[VanillaGorrila]

Looking to procharge my stock SS 1le and looking for some advice from guys who have done this before.


Which head unit would be most efficient for about 700hp on pump 93octane?


Is upgrading to lt4 HPFP and injectors still the way to go with this setup?


My car has about 25,000 miles is there anything I should look over before going FI?


Lots of information on here and I've read so many pages but want to make sure im doing the most up to date upgrades without wasting money



thanks for any input

[Joshinator99]

If you’re sure you’re staying at 700 WHP, then LT4 fueling is fine. If you think you might go bigger down the road, do port injection now and get it over with.

I’d go a step colder with the plugs while you’re at it.

[Sillysspeed]

I just got done a P1x with stage 2 intercooler. Did lt4 injectors, high side pump and in tank pump. Along with jms booster, baro breakout harness, zz performance guage pod with banks guage and aem afr. Turned out real nice I think. Able to run e50 fuel in cold air. Don’t know how much power but good enough to trap 133 on otherwise stock car.

[cjperformance]

To get 700 WHP you'll want to run some E. Too much boost plus high compression on 93 is no bueno.

[Sillysspeed]

Originally Posted by cjperformance

To get 700 WHP you'll want to run some E. Too much boost plus high compression on 93 is no bueno.

Definitely. 700rw is gonna take a few pulley sizes down too. I do know a few guys running boostane with good success.

[VanillaGorrila]

absolutely no access to E85 where I'm from. 94 octane is tops


I'm told the 1le has the in tank pump from the zl1 so I should only need the HPFP and injectors in regards to fuel?

[KingLT1]

You cannot get to 700whp on 93 without a cam to bleed off some dynamic compression on a SBE LT1. You need either, E85, Race fuel, VP octanium, or Meth injection. Ideally on a pump gas build I would do cam, rods, lower CR pistons. Or trade in and buy a ZL1.

[VanillaGorrila]

700 is just a number


not selling the car lmfao


NO E85 or other bs just pump gas. im sure others have procharged their cars without drop in pistons and race fuel LOL

[KingLT1]

The number is very important on this platform if you don't want to blow your engine up. If you are limiting the car to pump gas on the stock bottom end, then you can get to about 600whp safely with LT4 high side and a JMS low side booster.

[radz28]

To King's point: I'm not sure you aren't on the edge at 700 with a ZL1 on 93, lol. I'm pretty sure it's not possible on anything less than 93 though.

[Joshinator99]

Originally Posted by VanillaGorrila

700 is just a number


not selling the car lmfao


NO E85 or other bs just pump gas. im sure others have procharged their cars without drop in pistons and race fuel LOL

There is no such thing as “just a number”. These cars are torque-based ECMs so every single HP equals a corresponding amount of airflow and spark advance. Getting much above ~600-650 WHP on the SBE on 93 only is asking for trouble. It’s simple, you have a high compression engine that is getting boosted…that requires octane that 93 cannot adequately provide. If you cannot provide octane, then you need to get the compression down somehow (cam, drop ins, etc). This has been very well documented on this board over the past 6+ years.

Originally Posted by KingLT1

The number is very important on this platform if you don't want to blow your engine up. If you are limiting the car to pump gas on the stock bottom end, then you can get to about 600whp safely with LT4 high side and a JMS low side booster.

[Joshinator99]

Originally Posted by radz28

To King's point: I'm not sure you aren't on the edge at 700 with a ZL1 on 93, lol. I'm pretty sure it's not possible on anything less than 93 though.

Important to keep in mind the LT4 ZL1 has lower compression and a stronger bottom end than an LT1 to boot. The SBE LT1 has less wiggle room.

I know you know this Rad, but others in this thread may not.

[radz28]

Originally Posted by Joshinator99

Important to keep in mind the LT4 ZL1 has lower compression and a stronger bottom end than an LT1 to boot. The SBE LT1 has less wiggle room.

I know you know this Rad, but others in this thread may not.

Thank you for pointing that out. Not everyone hears the conversation I'm having in my head, LOL...

[Sillysspeed]

Originally Posted by VanillaGorrila

700 is just a number


not selling the car lmfao


NO E85 or other bs just pump gas. im sure others have procharged their cars without drop in pistons and race fuel LOL

Your best bet is to go with the stock pulley P1x with the stage 2 intercooler and get a real nice tune and be happy. If you still want more you could do meth injection and go with a smaller pulley. Beyond that you are asking for trouble