How much hp can a stock 4l80e handle

The factory injectors are only rated at 25 lbs. and won't support much more than 380 hp. ... The stock heads can be CNC ported for more airflow and milled up to .030 in. for more compression. Flow numbers can be as high as 325 cfm at .600 lift. ... They've been known to handle over 1000 whp. The main reason for going with a stroker forged ...

Just wondering how much hp can these stock internals actually handle. The tech guide said you can get a reliable 400hp on the stock internals. Obviously i will be puttin the boost down when i'm daily driven. Also whats a recommended place to get good internals for the 4g63. Thanks! i want high hp but reliable at the same time. Vic.0. 0. Jul 19, 2001. #3. You want power, you can get it with the RX7. A local mod shop sold his RX7 monster. 484 HP, 515+ torque in a 1.3 liter engine. It was a monster, but he sold it to buy a Mercedes for his wife and son. The rotaries were made for power, but have a higher maintenance. Think about that when you buy one.With our minds shifted into heavy-duty overdrive, we made a call to Monster Transmission to get our hands on a complete 4L80E Monster in a Box rebuild and shift kit. We also sourced Monster ...You will be perfectly fine with stage two's which are around 140+HP. Your stock turbo will only be in the 35-38 psi range with those sticks. Your usually good till 40+ psi. New bolts should hold it for a good while. '99 Super Duty Pullin Truck with a trick 6.7L twin turbo CR built by BDP. Save Share.At the current 470-480lbft, driveline shock is less than it was with the stock turbos making a 500+lbft torque spike in the 3500-4000rpm range. IMO, the failures happen with the high RPM stick launches and Auto 3k power-brakes, more than doing roll-ons with 450+hp.

• 1 yr. ago. Depends on driver, tire, surface, gears, vehicle. The more resistance at the back end the more likely it'll break. Big difference between Slicks and a trans brake on a prepped track vs street tires and a 1800 stall. Lots of guys with 500whp and stock transmissions surviving. 4. Reply. Share. misfit0513. • 1 yr. ago. 650 so far lol. 3.5-speed trans of any year holds up to about 250wtq. Not hp. Stock connecting rods inside the block also only hold to about 250wtq. For example, a Rotrex powered block could make 250whp but only around 190-200wtq and never pop the block or the trans. Versus a turbo which the torque and horsepower numbers a significantly closer to each other. 16.The bottom end alone is several grand in parts. 300WHP can be made with the torque that ALH's are already putting down. 400ft-lbs @ 4000 rpm your at 300WHP so it's not that you need to make more torque you just need enough fuel and air to hold it into the upper range.my friend if you need 22lbs to make 550. u need a larger turbo very bad. thats insane boost for a v8 to only make 550. the heat alone had to be killing it. My 82 s10 lb 8.89 at 152.78 on pump E85. 15lbs boost 357"sbc 8.4:1. 89 s10 blazer 9.90 nitrous 335" sbc 12.4:1 e85 homemade 750 225 shot.For a 4l80e it might be okay to use 150mA for example. But a 4l60e I would imagine needs a bit more, so I would shoot for 89mA or something closer to zero at WOT if you are making the 600-700 horsepower that those transmission can handle when fully built. 4. Finally for trans part throttle tuning, there are two ways you can go about it.

88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it. 04 Mach 1 12.7 @ 109 mostly stock - sold it. 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it. Like. This is an older thread, you may not receive a response, and could be reviving an old thread.A 4l80e, stock (either new or rebuilt using stock-level parts), can handle about 450 hp or thereabouts. If you expect to go beyond that, I would suggest getting one built for more hp. A 6l80e, stock, is in the 5-600hp range from what I gather from google. 2004 Sierra 3500 dually, 6.0L extended cab, cab&chassis flatbed, upgraded to 4wd.How much does it cost to rebuild a 4L80E transmission? A local transmission shop will rebuild a 4L60E for around $900 to $1,200 and a 4L80E for $1,300 to $1,800, with used units going for about $400 and $600 to $1,000, respectively.MAVEN said: The GM torque capacity specification for the T56 used in all applications is 400lbft. What does this mean....not sure Ive seen lots of 450=hp C5's and a few 600+hp ones all using stock T56....basically the tires slip before trans damage occurs unless youve gone insane and have like 800hp/800lbft, or just mercilessly beat your car ...

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How much HP can 4L80E take? When it comes to high performance transmissions, Performance Automatic has a proud history of delivering beyond expectations. Their 4L80E transmission is no exception. Engineered and built with the highest quality parts available, this transmission can handle more than 700 horsepower and comparable torque levels. The ...The 330 uses a lot of forged internals so it's pretty stout. Your biggest limitation with stock pistons and any kind of FI is going to be due to the compression ratio, which will limit the amount of boost you can add without major detonation issues. That said, about 400 crank hp on stock internals isn't a problem.21205 posts · Joined 2009. #2 · Jul 26, 2017. I have a run that and more power in my Mustang using an AODE which is basically the same as a 4R70W. It's not always the HP that kills them, it is the torque, car weight, how hard the car leaves and rear gearing.The LQ9 is a 6.0L Gen. 3 small block engine used in GM trucks between 2002 and 2007. For marketing purposes, it was also known as the Vortec HO 6000 or VortecMAX. The information listed here is for the stock engine. Mechanically similar, General Motors' LS and LS-based Vortec engines wound up on almost every branch of the GM family tree ...172 posts · Joined 2007. #15 · Mar 27, 2009. i run a 230hp tune on my truck and its got a stock 48re. pull atleast 20k on flatbed without a problem...never turn the tune down either..pyro gets PRETTY warm when in it real good. *thats an 05 dually*. '09 QCSB 4x4 bone stock farm truck, recon strobes, boss 9'2" vxt.The 4L60E can handle up to 360 horsepower and 380 lb-ft of torque. This is the maximum rating for the transmission, and it is only achieved with an aftermarket torque converter …

The horsepower that stock and an upgraded 700R4 transmission can handle is not the same. If you’re wondering how much hp can a stock 700R4 handle, the answer is around 300 HP. Though a stock 700R4 is rated to handle 350 HP, the users tend to have trouble when they go over 300 HP.The stock internals can handle in the ballpark of 400hp at the crank. The hard part is getting there and being able to put it to the ground. ... (250+) hp range is at best difficult. You can start with the following mods first which are described in detail at Z31.com: better cat back exhaust 240sx throttle body (SOHC, w/ cruise) headers cams ...Turbolag87 said: dodge tested out the limits at 700whp untill the pistons and rods were changed. There is a big difference between consistently holding power in the real world and holding it for a failure test in a lab. The SRT has an awesome engine with a lot of strong parts. However, I would not use stock rods at 500whp.Lasting him about 2 years of racing every weekend and drove it to work. I would say a 600 to 650 Hp build. 200cc dart heads, compcam 292H, Victor jr, 750 DP, 300hp shot N02, 3500 stall, and 4.56 gears. Finally developed a rod knock after eating 20lbs of n02 every week for 100 weeks.Extended pulls over 700rwhp has been the culprit of crumbling input clusters and overall toasted T-56 transmissions. By extended pull, I mean accelerating long enough to heat the gears up beyond what they can tolerate. Generally 3-4-5 to redline would get you there. To answer your other question, contrary to what 99% of guys think, a 26 spline ...A two-bolt main, cast crank bottom end, properly machined and assembled would be good for at least 550-600 hp. 6-6300 rpm limit. 4 bolt mains and a steel crank can handle 700hp and 7200 rpm. Authentication and pre-purchase inspection service still available. PM me for more information. :thumbsup:605 posts · Joined 2004. #3 · Oct 2, 2007. I agree with Briscoe that ~400 hp/tq is about the limit. I think the first thing to fail in a stock calibrated TH400 due to power would usually be the direct clutches. The sprag is a weak point also but I think engine rpm is as much of a killer as power. Lower rpm combos, even with tremendous torque ...Honda J series are known to handle really solid power numbers. Drag guys seem to make ~700hp with minimal modding (outside of massive turbos and injectors), but I'd imagine your streetable numbers would be closer to 400. That being said, odyssey automatics really arent "upgradable" in a lot of ways, they're kinda just bad.It is capable of handling up to 700 ft-lbs of torque and can be used with engines that produce up to 500 hp. The 4R70W is also capable of handling rear-wheel drive and four-wheel drive applications. The 4R70W has a maximum power rating of 700 ft-lbs. This means that it can handle engines that produce up to 500 hp.How much HP can a stock rearend handle. My 327 is putting out about 350 HP. Running a Tremec 5 speed with 3.73 stock posi. In my younger days I would break axles not the rearend in my 63 Impala with same amount of HP but I had an automatic in the car. I know of the aftermarket posi units but does anyone make aftermarket axles for our trifives?The 4L80E contains a pan that is oval, while the 4L60E has one that is shaped like a rectangle. The number of bolts that both contain is also different. There is one gasket with 17 bolts on 4L80E models, while the 4L60E pan contains 16. 3. Weight/Size. Because of the application, the 4L80E is much heavier and larger than the other transmission.With the proper care and parts your car can safely handle 227 CHP (roughly 170whp). I will place money that you are going to break very little with that amount of power if you care for your vehicle. 0-60 faster then your first sexual experience. "You've come far, and though you're far from the end.

For the "price" it's fantastic, and is reported to be able to handle up to 500 rwhp - which I'm hoping to be at by next spring. 2006 GTO Phantom Black - M6 - sold. GMM Ripshift, LS7 clutch - Pedders Street II. AEM CAI, Coated Dynatech LT's, PowerCat high flows, Magnaflow cat-back w/ e-cutouts.

The horsepower that stock and an upgraded 700R4 transmission can handle is not the same. If you’re wondering how much hp can a stock 700R4 handle, the answer is around 300 HP. Though a stock 700R4 is rated to handle 350 HP, the users tend to have trouble when they go over 300 HP.How much horsepower can a stock allison transmission handle Cummins 6bt Torque handle building power. How much horsepower can a fj60 handle? Ih8mud forum reactionsHorsepower engines How much nos can a stock 350 handleBuilding a 4l80e to handle more torque and power!. Duramax horsepower allison . Check Details. …181 posts · Joined 2012. #4 · Sep 28, 2012. Ripp is running around with the Ram Runner with over 100 hp on stock Trans. 2012 Ram 2500 Outdoorsman 4X4, 4:10 gears, 305/60/18 Pro Comp Xtreme AT, ION 18x9 wheels, Magnaflow muffler, fastman throttle body, Bullydog Tuner, Edge 2600 stall TC. Like.At the current 470-480lbft, driveline shock is less than it was with the stock turbos making a 500+lbft torque spike in the 3500-4000rpm range. IMO, the failures happen with the high RPM stick launches and Auto 3k power-brakes, more than doing roll-ons with 450+hp.Stock 4L60E planetary gears are designed to handle up to 400 horsepower and 380 lb-ft of torque. Upgrading these components is an effective way to increase the power handling capability of the transmission. Aftermarket planetary gears are available for the 4L60E, and they are designed to handle up to 700 horsepower and 650 lb-ft of torque.2510 posts · Joined 2004. #2 · Apr 13, 2009. Well...It depends on the block. If a competent machinist does a full inspection and finds minimal core shift and no casting flaws, and then the appropriate upgrades are accomplished (billet four-bolt mains, etc.) then the block could survive making 1,300 hp for short periods (like quarter-mile ...A tune and rear end gears, best bang for the buck on the V6. Dual exhaust will change the sound, but not really add much HP. Cold air intakes are popular, but are worthless without a tune and even with a tune don't add more than 10-12 hp. With the stock long block there just doesn't seem to be the easily made HP with simple bolt ons like the …There's nothing all that special about it. It's a TH400 with a billet input shaft and hub. It's definitely breakable. I would recommend a 300M mainshaft at that power level. the 2.48 ratio loads the mainshaft more than a 2.10. And that power level the 2.10 starts to make sense on most combos.I'd say max just under 300bhp. I know a guy who made approx 278HP. In Ireland the is200 is the most popular car in the scene I know 40 of them in my small town and my friends making 314bhp with his 1gfe and she handles it.The 4L80E featured a large 32 spline output shaft (even though much stronger) in its various 2wd and 4wd applications. 4L80E vs. TH400. The 4L80E featured an overdrive fourth gear which required an extra gearset as well as a longer (1-1/2″) case. The transmission uses electronics to control shift points.

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The basic 250-horse-capable 2004R transmission begins at about $1,600 without extras, plus shipping. A 400-horsepower version begins at $1,799 without any extras (plus shipping). The 800 ...At 700hp with street tires, you could probably put a stock 4L80E in there with a decent torque converter and a $90 Transgo kit and drive it on a daily basis with very good reliability at your proposed power levels. As for cost, the 4L80E's are still kinda pricey. You can good good used one's for around $1000, or GM Reman's for about $1400+.6826 posts · Joined 2012. #29 · Nov 25, 2019 (Edited) RocketRobin said: The stock clutch can handle about 360 lbs torque. I swapped mine out for an ACT HD clutch that can handle 522 lbs. Pedal pressure and modulation is ok for city driving, but it's not the nicest. This clutch takes a while to break in.Reads 148. A stock 4l60e can handle up to about 600 horsepower. However, there are many aftermarket options that can greatly increase this number. For example, there are upgraded input shafts and output shafts that can handle up to 1,000 horsepower. There are also transmissions that have been built specifically for drag …Jul 14, 2009. #2. A stock one will hold up for some time with 500crank hp. Push more than that and it is on borrowed time. Plus with a used one who knows how abused it already is. A rebuild with good & extra clutches will result in 600-700 crank hp. Some more easy mods and you can build them to hold well over 1000hp.Power is (torque * RPM/ 5252). Max RPM for a mostly stock L28 is around 7500 RPM. If you can make the engine flow enough air/fuel (thats all that porting and polishing and big cam, etc.) to fill the cylinders at 7500 rpm, you get 240 hp. Thats a very radical L28 for the street, more typical is 200-225 hp.May 21, 2009 · The ultimate limiting factor becomes the OD section. 1200 HP is a good number. I'm working on a fix for the OD section to improve it's strength. a built 4L80e will stay behind a 1000rwhp/1000rwtq turbo'd 408 lsx in a 4500lb. truck, and that is well documented. a 4L65e will hold up to 500rwhp/500rwtq in the same truck. Power is (torque * RPM/ 5252). Max RPM for a mostly stock L28 is around 7500 RPM. If you can make the engine flow enough air/fuel (thats all that porting and polishing and big cam, etc.) to fill the cylinders at 7500 rpm, you get 240 hp. Thats a very radical L28 for the street, more typical is 200-225 hp.FM1R. 31427 posts · Joined 2007. #13 · Sep 16, 2010. I have heard that the stock pistons and rods can hold up to around 6xx/6xx at the tire. Sure every car is different, but if you're like me and you see a lot of track time then I wouldn't push it that if you're not ready to rebuild soon. Like.Table of Contents. How Much Power Can a Stock 4L60E Handle? The engineers at GM designed the 4L60E to withstand impressively high power outputs in stock form: Reliably … ….

Oct 6, 2006. #9. Typically the stock block is good to about 450 hp. There are some really lucky ones what have an exceptional build and the stars are lined up correctly but don't bank on it. The girdles don't strengthen the block because its not part of the block. The GM 4L80E Performance Transmission Level 4 is powered with whopping 800 Horse Power. This automatic transmission gear can also generate up to 700 ft. lbs. of torque at a stall level of 2800 to 3400 rpm. This automatic transmission for sale is compatible with custom built and custom stalled 10” Lock-Up Billet Racing converters. Re: How much boost can a stock 1600 DP handle. by Stripped66 » Fri Sep 05, 2014 4:40 pm. my_medusa wrote: With the 10mm i Talked about stock ones. That 10mm can hold alot! I recall the Red Baron used stock 10mm studs back when they were still running in the 8's; I know of several 400+hp engines that run them as well.* The stock L29 (454) makes only 290hp, but cranks out 410 ft/lbs ... about how much torque their design can handle. Keep in mind that if you ask them how much torque their baby can handle, any engineer ... and then by 2.48 by 4L80E low gear (2182+ ft/lbs at the trans output shaft, not counting losses within the transmission--driving the pump ...First of all you are looking 5,000-10,000 on a motor. The turbos are not cheap nor the motor. To get 400-500 horses out of a 318 is not that difficult. You need good heads, cam and intake.Can a Stock 4L80E Handle 500HP? • 500HP Stock 4L80E • Discover if a stock 4L80E transmission can withstand 500HP and the key modifications for optimal perfor...its not really how much "it" can handle but how much you can. Ive raced circle track cars with 400+hp with Muncie trannys and theve been just fine. it really comes down to how you treat it, drop clutching speed shifting, you can break it with a mear 300. just treat it nice and you should have no problem with 400-600hpan earlier 69-70 block as a rule of thumb can handle more then the rest of the 70s, and those can handle more then the roller blocks. now with that said it all comes down to how well it is built and most importantly how well its tuned. a bad tuned 351 can split at a few hundred HP, i have seen 69-70 blocks put down a little over 700 to the wheels. How much hp can a stock 4l80e handle, 0. No views 2 minutes ago. Can a Stock 4L80E Handle 1000HP? • Stock 4L80E and 1000HP • Discover if a stock 4L80E transmission can handle 1000hp or if modifications are needed to ensure reliable..., Santa Rosa, CA. Jul 3, 2006. #3. 1100 hp. See Joe Morgan and the Turbonetics Ford Focus! In the real world, 300 hp for a couple hundred $$ (if that) and a weekends work. A few hundred more and you're into the 400 hp range. Of course, an excellent tune is a big part of that! P., Jan 2, 2008 · Re: 4l80E - How much can it handle? Yes it can handle quite a bit. My truck makes 320 whp/500 wtq, weighs 3780 lbs with me in it and ran 11's. Blake 80e with a shift kit and good clutches only. That being said, if you are not goin to do alot of highway cruising the t400 would be cheaper and just as strong. , The HP 12C is Hewlett Packard's longest-selling calculator. It is specifically designed for financial calculations, including mortgage payments, the time value of money, cash flow ..., If you want to keep your truck dependable without having to rebuild the tranny, keep it to about 90 hp over stock (that is about 160-180 lb/ft of torque over stock) 2021 GMC Sierra 3500HD Denali. Lomax Diamond Mist Tonneau. SOLD 2016 GMC Sierra 2500HD Denali. SOLD 2004 GMC Sierra LB7., Jun 5, 2023 · It is well-known for its durability and many stock 4L60E transmissions can handle up to 425 horsepower due to the heavy-duty internals and the extra-wide bands that are pre-installed. The stock 4L60E is also designed to handle up to 450 lb-ft of torque and can handle up to 600 hp with upgraded components. , Conclusion. The bulletproof nature of the Ford AOD transmission can be unraveled just by knowing the right buttons to push. When that has been put in place, you can boost its performance from about 400 hp to as high as 1,200 hp which makes for excellent speed while racing., Although the stock 4L80E transmission can handle 450/450HP over the long term, there is a critical component that will wear out faster. This is the input shaft. While it is easy to …, 3431 posts · Joined 2009. #2 · Feb 15, 2017 (Edited) I've read a stock 700r4 can handle 350 lb-ft of torque. But some were rated higher depending on it's application. 1989 was not a high horsepower maybe 230 or torque motor if I recall correctly. You could just have that trans freshened up to handle new motor., If you really have 1000 HP you should be running way quicker and way more MPH so you either have way less power or a big issue putting it to the ground. You should have some room to lower that e.t. no problem with a stock block. I ran a stock block small block to 6 flat in the 1/8th at 3450lbs. I was figuring on 675 at the crank., A high-quality TH350 that has been properly built and maintained can easily hold upwards of 1,000 horsepower. However, a lower-quality TH350 or one that has not been properly cared for may only be able to hold half that amount, or even less. Another important factor is the type of engine that is being used. A naturally aspirated engine will not ..., 172 posts · Joined 2007. #15 · Mar 27, 2009. i run a 230hp tune on my truck and its got a stock 48re. pull atleast 20k on flatbed without a problem...never turn the tune down either..pyro gets PRETTY warm when in it real good. *thats an 05 dually*. '09 QCSB 4x4 bone stock farm truck, recon strobes, boss 9'2" vxt., IMO, The 4L80E is unbeatable for durability as far as OD transmissions go. It will fit in most chassis with minimal work as far as floorpan ..., These stock LT4 cams really do no like rpm, they're even worse on the stock blower. Heres some data: **All tests completed at 4000ft altitude, DA changed but dyno is using SAE correction. This is my final run for all 3 configurations: Green: 90mm upper, stock lower: 14.5psi at 6500rpm, 24deg. 8psi at 3000rpm., should handle 140 ft-lb forever no problem. Torque kills, not HP If it is ACTUALLY a 69' model trans then it will have the weaker diff compared to mid-70's trans, so if rebuilt then get the later stronger diff and "welded" 3rd and 4th gears the later model SSC trans has been known to handle 180 ft-lb and sometimes over 200 HP without ..., MAVEN said: The GM torque capacity specification for the T56 used in all applications is 400lbft. What does this mean....not sure Ive seen lots of 450=hp C5's and a few 600+hp ones all using stock T56....basically the tires slip before trans damage occurs unless youve gone insane and have like 800hp/800lbft, or just mercilessly beat your car ..., Black Diesel said: Drive pressure is what lifts heads but about 50 psi of boost is usually the limit. I push about 47-48 with stock bolts. Don't plan on doing that for much longer though. Sent from AutoGuide.com App. Iv ran 58 pounds on my stock head bolts for the last 5 years and never had a problem., It is well-known for its durability and many stock 4L60E transmissions can handle up to 425 horsepower due to the heavy-duty internals and the extra-wide bands that are pre-installed. The stock 4L60E is also designed to handle up to 450 lb-ft of torque and can handle up to 600 hp with upgraded components., The number of bolts that both contain is also different. There is one gasket with 17 bolts on 4L80E models, while the 4L60E pan contains 16. How much power can a 4L60E handle? Their Stage 2 Pro Race transmission can handle gobs of power while their Invincible Black Edition 4L60E trans can support over 1,000 ponies., A tune and rear end gears, best bang for the buck on the V6. Dual exhaust will change the sound, but not really add much HP. Cold air intakes are popular, but are worthless without a tune and even with a tune don't add more than 10-12 hp. With the stock long block there just doesn't seem to be the easily made HP with simple bolt ons like the 4. ..., Mar 27, 2022 ... 4l80e Transmission was built by a "professional" transmission builder to handle 1000+HP ... Your browser can ... Turbo 5.3L w/ 4L80E and STOCK STALL., 431 posts · Joined 2009. #16 · Aug 24, 2010. ^ i can testify for shoaf his car does make 550 rwhp and then 10 bolts still holdin, mines makin 360 rwhp on motor with 12" wide street tres and i launch the piss outta mine all day, some hold up some dont its varies from car to car. -1996 Trans Am. cammed and sprayed:bat., The stock 7.3 is capable of producing up to 250 HP. However, with some modifications, it can reach up to 400 HP. It is important to note that modifications can cause the engine to become less reliable, so it is important to consult a …, 2850 posts · Joined 2005. #1 · Jan 7, 2006. im changing combo's from a single 101 to twin 88's and exspect to make around 2500hp. the car weight will be around 3000lbs. and i run a 33x10.5 tire. can a glide hold up if its done right . and what input shaft would you recommend. i have a 300m ringless shaft now. is there a better one out there ..., Oct 6, 2006. #9. Typically the stock block is good to about 450 hp. There are some really lucky ones what have an exceptional build and the stars are lined up correctly but don't bank on it. The girdles don't strengthen the block because its not part of the block., 2614 posts · Joined 2002. #5 · Mar 14, 2009. A stock 200 should handle 350-400hp on the street. With track abuse or big stickies then only 300-350 without issue. True a stock 700 or 4l60 can handle 400-450 and @400 at the track. There's pro/cons to both. The 200 is an easier swap but it also has better gear ratios than the 700., How much hp can a stock block jdm d15 handle? 218whp on a mustang dyno, which supposedly reads a little lower. this month i am goin back to the dyno, this time a dynojet. gonna baseline the 15psi tune again, then tune for an electric cut out. and then tune it for more power with a methanol kit from snowperformance., HORSEPOWER RATING: This transmission will support up to 1000 RWHP. NOTE: All units are available in either 2wd or 4X4. If you have a special application requiring a special adapter or output shaft, please contact us and we will be happy to provide it and quote a price for your special application. YEARS: 1989 to 2008 4L80E transmissions ..., 2921 posts · Joined 2003. #5 ·Feb 6, 2006. The factory THM 350 transmission "generally" can take about 300 to 350 Lb/Ft. of torque max for the truck versions. Cars are a little less. In the 80 versions where they started using an electronic stall converter they don't hold up well at all., 0. No views 2 minutes ago. Can a Stock 4L80E Handle 1000HP? • Stock 4L80E and 1000HP • Discover if a stock 4L80E transmission can handle 1000hp or if modifications are needed to ensure reliable..., the best thing to do would probably talk to the supplier of your forced induction & see what they remomend.I do know thah a 255lph pump is good for 700 naturally aspirated hp.A stock Gt pump (110lph)is good for 315hp naturally aspirated ( both at the flywheel) 1992 4cyl conversion w/Pro Products upper & lower, 75mm TB & EGR, CAI to inner fender ..., Carbondale, Pennsylvania. 4g63 blocks can handle more than 450hp with a good tune. But general rule is about 400, but like I said there has been alot of cases with more than that. Im running 24 psi on a evo III and meth and my block has been fine for 10k miles (all summer). -Jeff G., 2850 posts · Joined 2010. #3 · Apr 22, 2017. my stock trans with a shift kit held a little over 300whp with a 2600 stall converter for 2 years. when i did my rebuild i was making just a little over 400whp on a patc level4 kit. i did end up getting come codes and pressure issues with my pcm that limited me to pushing the trans to its full ...