[WiggyB]

When I started my build I made 565whp with the p-1sc-1 w/ stage 2 intercooler, lt2 intake and kooks headers with a custom tune. I know you were just asking about just the blower but to get where you want comfortably I think you will at least need headers too.

[KingLT1]

Everybody wants to talk about WHP but that is only 1 part of the equation. A base Procharger kit with canned or even custom tune making 550whp on a dyno is more like 480whp on the street in real world because these engines will not sustain any timing on 93 octane even with low boost.

Pray performance posted a video about this on his Youtube channel.

When you switch to Ethanol the gains end up being much more in real world because we can keep the timing in the engine at higher temps.

93 octane is absolute piss water for a stock compression LT1 with Forced Induction. It's not even enough octane for NA applications which is why they pick up 25-30whp NA on E85 with just a few bolt-ons.

[Joshinator99]

Originally Posted by KingLT1

Everybody wants to talk about WHP but that is only 1 part of the equation. A base Procharger kit with canned or even custom tune making 550whp on a dyno is more like 480whp on the street in real world because these engines will not sustain any timing on 93 octane even with low boost.

Pray performance posted a video about this on his Youtube channel.

When you switch to Ethanol the gains end up being much more in real world because we can keep the timing in the engine at higher temps.

93 octane is absolute piss water for a stock compression LT1 with Forced Induction. It's not even enough octane for NA applications which is why they pick up 25-30whp NA on E85 with just a few bolt-ons.

We need a “mic drop” emoji on this forum…! Well said King.

[FrankBama]

Originally Posted by jstanton

Thank you for the insight and I want to hear more about your experience!

Before I jumped back on the forum and saw these response, I called ProCharger to ask some questions about this setup on a stock LT1 bottom end and fuel system. I was told that the P-1SC-1 with the HO or stage II intercooler was safe on my car without any modification to the fuel system and I shouldn't have any issues running their standard conservative tune. I'm just repeating what they told me. I understand there are variables they are probably not accounting for, like ring gaps as King stated, but I wanted to share what they told me.

They told me the same thing. 2022 stock SS. Same set up as you discuss. Ran it on a track and broke the piston rings. In my opinion, not a good option; you need forged internals.

[WiggyB]

......

[ZO6Ted]

Originally Posted by Joshinator99

We need a “mic drop” emoji on this forum…! Well said King.

100%. King is THE King. Can't yell it loud enough!

[Anom1LE]

This is what happened to all 8 pistons when I added boost to a FBO/SBE LT1.
It had plenty of fueling and I was in the middle of updating the tune. It destroyed
all 8 pistons and there was metal everywhere. Wanna know what conditions it blew up under?

* 4 PSI
* 84% throttle
* Plenty of fuel - 11.4afr - 93 Octane

Bowls of broken parts and a very long and very expensive road of getting a new setup to handle the extra sawce.

My recommendation is to just do a FBO/E85 Tune from a quality tuner, and build a shortblock on the side ready for boost.

[Tim M]

Impressive - if it has to go, go big!

[18.2SS.1LE]

You screwed something up bad, how much timing? Mine has been running strong for 3 years on the stock bottom end.

[KingLT1]

Originally Posted by Anom1LE

This is what happened to all 8 pistons when I added boost to a FBO/SBE LT1.
It had plenty of fueling and I was in the middle of updating the tune. It destroyed
all 8 pistons and there was metal everywhere. Wanna know what conditions it blew up under?

* 4 PSI
* 84% throttle
* Plenty of fuel - 11.4afr - 93 Octane

Bowls of broken parts and a very long and very expensive road of getting a new setup to handle the extra sawce.

My recommendation is to just do a FBO/E85 Tune from a quality tuner, and build a shortblock on the side ready for boost.

Sorry to hear of your issues but there are important details that need to be addressed before supercharging a LT1.

11.4 afr is too rich for DI engines and has NO value in regard to "plenty of fuel". You need to look at fuel pressure and injection timing. 11.4 can cause "fuel knock" on a DI engine. Ideal AFR should be around 12.0-12.2.

Correct heat range spark plugs, and ignition timing are very important. LTR7ix-11 or Brisk RR14s plugs with no more than 11-12 degrees of timing on pump gas. Ethanol fuel is really what these engines need to run boost as I have mentioned time and time again. If limited to pump gas, ideally the dynamic compression needs to be brought down with different pistons or at least a bigger cam.

Knock retard, proper crank case ventilation, and PCV filtering (catch can) are also very important. Any oil that gets into the combustion chamber will detonate and can frag a piston.

That being said there is still always the chance you get a LT1 that decides to have pistons leave the chat but it's not very common if you address the things I mentioned above.

I have been running 10psi of boost on my SLB bolt-on LT1 since 2019 without issues. I run 19-20 degrees of timing @ .82 lambda with E50-60 fuel.

[arpad_m]

I ran a supercharged LT1 setup with only the Maggie, LT4 fueling plus a JMS voltage booster at 7-7.5 psi of boost for 560-ish rwhp for a while.

In the back of my mind, however, I always wondered how long the stock backend will survive any time I pushed the car even a bit, an especially at the drag strip, wondering if mine is one of the unfortunate units that just barely made the LT1 specs, which is not the best way to enjoy a car like ours.

Having upgraded to fully forged internals (practically only the LT1 block is stock in my engine, which is the same part as the LT4) gave me a peace of mind that I appreciate. Indeed this is a costly endeavor on this platform, no question about that.

[Joshinator99]

To echo King’s post, “plenty of fuel” is not the same as plenty of octane unfortunately and you can definitely get knock from being too rich on a DI motor. Even E45-E50 is a huge help to SBE.