[Fabyfresh]

Hello, so I have a question. I currently have a Twin turbo 6262 oil less turbos on a stock LT1 with stock fuel system on 93. I’m making 565whp and 585wtq. Could I and how much more could I make if add the LT4 injectors and lt4 hpfp? I plan on doing a much bigger and expensive build later down the road. Just wanna have a little more power to play with for now. Maybe a little over 600 to 630whp

[ZO6Ted]

Yes but the pistons and ring gap without additional cooling. Do a search on other builds on here or read through threads on FI. That's why I'm here, tons of great info. You'll find your answer.

[JasonGofast]

Note: This is only from my research on this forum and other places. The LT4 fuel components should allow you to get to 650 whp. Even more so if you combine it with a JMS voltage booster or DSX aux pump.

[asthmamax11]

I'm starting to suspect GM sabotaged our chances of reliably using pump gas with this direct injection nonsense

[Fabyfresh]

Originally Posted by JasonGofast

Note: This is only from my research on this forum and other places. The LT4 fuel components should allow you to get to 650 whp. Even more so if you combine it with a JMS voltage booster or DSX aux pump.

Now is that including the pump in the tank? I’m not trying to add that because like I said I plan on getting the car heavily built later on professionally. If I can make close to that with safely with the injectors and hpfp I’ll be content for now.

[Fabyfresh]

Originally Posted by ZO6Ted

Yes but the pistons and ring gap without additional cooling. Do a search on other builds on here or read through threads on FI. That's why I'm here, tons of great info. You'll find your answer.

I mean the car has been running perfect now..I know some people have ran like close to 700whp on stock internals. I have done research. I’m not trying to go crazy on the build right now. Just push a little bit more power until I’m ready to build it more and dump more money into it. A lot of people are running the lt4 fuel system but they usually include the in tank pump but I’m not..I did some looking around don’t see much info on just injectors and hpfp

[KingLT1]

You will hit a octane wall on 93 before fuel limitations with the lt4 stuff. You need meth and/or e85, or race fuel for added octane.

LT1 fueling on 93 taps out around 575whp.

LT1 fueling on 93 + meth will reach 650-670whp.

LT4 fueling and 93 will reach 600-620whp. Pushing above that will put the engine on edge...too much heat in the cylinder.

LT4 fueling and 93 + meth will reach 750whp.

LT4 fueling and e60 will reach 630whp before running out of fuel.

LT4 fueling, e85, and meth will take you to 800+whp.

LT4 fueling and race fuel will take you to 800+whp.

This is just ball park estimates. Also other things play a factor...octane and cooling will go a long way in protecting those stock pistons. So don't look at a particular option and chose it because it supports more power for less money. E85 trumps all for removing heat out of the cylinder.

[Joshinator99]

Originally Posted by KingLT1

You will hit a octane wall on 93 before fuel limitations with the lt4 stuff. You need meth and/or e85, or race fuel for added octane.

LT1 fueling on 93 taps out around 575whp.

LT1 fueling on 93 + meth will reach 650-670whp.

LT4 fueling and 93 will reach 600-620whp. Pushing above that will put the engine on edge...too much heat in the cylinder.

LT4 fueling and 93 + meth will reach 750whp.

LT4 fueling and e60 will reach 630whp before running out of fuel.

LT4 fueling, e85, and meth will take you to 800+whp.

LT4 fueling and race fuel will take you to 800+whp.

This is just ball park estimates. Also other things play a factor...octane and cooling will go a long way in protecting those stock pistons. So don't look at a particular option and chose it because it supports more power for less money. E85 trumps all for removing heat out of the cylinder.

This should be a sticky!

OP: Give some thoughts to your ultimate goals. Knowing what I know now, I would have skipped LT4 fueling and went right to Fore triple in tank pumps and port injection. If you want over 800+ WHP down the road, bite the bullet and do it once. The fuel system is one place you cannot skimp on or it will bite you...

[ZO6Ted]

Originally Posted by KingLT1

You will hit a octane wall on 93 before fuel limitations with the lt4 stuff. You need meth and/or e85, or race fuel for added octane.

LT1 fueling on 93 taps out around 575whp.

LT1 fueling on 93 + meth will reach 650-670whp.

LT4 fueling and 93 will reach 600-620whp. Pushing above that will put the engine on edge...too much heat in the cylinder.

LT4 fueling and 93 + meth will reach 750whp.

LT4 fueling and e60 will reach 630whp before running out of fuel.

LT4 fueling, e85, and meth will take you to 800+whp.

LT4 fueling and race fuel will take you to 800+whp.

This is just ball park estimates. Also other things play a factor...octane and cooling will go a long way in protecting those stock pistons. So don't look at a particular option and chose it because it supports more power for less money. E85 trumps all for removing heat out of the cylinder.

Originally Posted by Joshinator99

This should be a sticky!

OP: Give some thoughts to your ultimate goals. Knowing what I know now, I would have skipped LT4 fueling and went right to Fore triple in tank pumps and port injection. If you want over 800+ WHP down the road, bite the bullet and do it once. The fuel system is one place you cannot skimp on or it will bite you...

What these guys said

[EDFHOBBIES]

Originally Posted by Fabyfresh

Hello, so I have a question. I currently have a Twin turbo 6262 oil less turbos on a stock LT1 with stock fuel system on 93. I’m making 565whp and 585wtq. Could I and how much more could I make if add the LT4 injectors and lt4 hpfp? I plan on doing a much bigger and expensive build later down the road. Just wanna have a little more power to play with for now. Maybe a little over 600 to 630whp

the lt4 pump and lt4 injectors will get you to 630 easy consider a boosta pump or an aux pump if you don't mind tapping the tank for the low side.

if your turbos are moving a lot of air with good iats 650 might be doable with 93 and 11.5:1 compression to go further you may have to introduce some E or meth just for the octane.

its funny you could do drop ins with 10:1 and the LT4 fuel parts and probably make 730s on 93 to go further you need a cam or you will be fuel pressure limited lol.. with the cam lobe you could make 850 easy if your turbos move as much air as 2650 rotor pack.

so anyway to look at it you will hit an octane wall followed by a pressure drop..


OR...

consider getting a manifold with port injection... run a separate controller for the port system and since you need a low side in the direction your talking you can swap the in tank for a triple or add a bigger aux pump either way they need to be setup as a return style with a pressure regulator. this will allow you to run full e85 and raise the octane wall you hit.. all your fuel needs will be done to 1400 hp then you can do cam and pistons later and your not messing with fuel system multiple times wasting money.

look at the crawford racing setup with holley or you can get with a good tune and run a Haltec setup and piece together rails, lines, and injectors.

[JANNETTYRACING]

Originally Posted by KingLT1

You will hit a octane wall on 93 before fuel limitations with the lt4 stuff. You need meth and/or e85, or race fuel for added octane.

LT1 fueling on 93 taps out around 575whp.

LT1 fueling on 93 + meth will reach 650-670whp.

LT4 fueling and 93 will reach 600-620whp. Pushing above that will put the engine on edge...too much heat in the cylinder.

LT4 fueling and 93 + meth will reach 750whp.

LT4 fueling and e60 will reach 630whp before running out of fuel.

LT4 fueling, e85, and meth will take you to 800+whp.

LT4 fueling and race fuel will take you to 800+whp.

This is just ball park estimates. Also other things play a factor...octane and cooling will go a long way in protecting those stock pistons. So don't look at a particular option and chose it because it supports more power for less money. E85 trumps all for removing heat out of the cylinder.

LT4 fueling and e60 will reach 670 rwhp before running out of fuel.

These numbers are based on Supercharger they will be higher on Twin turbos.

The Hellion twins make more power for each lb. of boost than anything we have seen.

I think we did one of the very first ones https://www.facebook.com/watch/live/...atch_permalink

[KingLT1]

Originally Posted by JANNETTYRACING

LT4 fueling and e60 will reach 670 rwhp before running out of fuel.

These numbers are based on Supercharger they will be higher on Twin turbos.

The Hellion twins make more power for each lb. of boost than anything we have seen.

I think we did one of the very first ones https://www.facebook.com/watch/live/...atch_permalink

Good catch! Yep I was basing that off of your Whipple and Flex Fuel WOW thread. But I did say "ballpark" just in case I was missing something(supercharger vs turbo). Turbos definitely reduce parasitic pumping losses so that makes sense.

[PeteSS2018]

Originally Posted by JANNETTYRACING

LT4 fueling and e60 will reach 670 rwhp before running out of fuel.

These numbers are based on Supercharger they will be higher on Twin turbos.

The Hellion twins make more power for each lb. of boost than anything we have seen.

I think we did one of the very first ones https://www.facebook.com/watch/live/...atch_permalink

Interesting info, thankyou!

Do you have an estimate on LT1 + 98 fuel?