Supercharging an LT4
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Safety Car
Joined: May 2003
Posts: 4,283
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From: Houston Texas
Re: Supercharging an LT4 (crewzenLT4)
You can run it on stock engine but for longevity you really need an intercooler or water injection to help prevent detonation ( not to mention good tuning). Wouldn't go over 6 pounds, 8 at the very most with above mods.
Instructor
Joined: Aug 2003
Posts: 102
Likes: 0
Re: Supercharging an LT4 (BAM92)
I was running 5 lbs. on my P1SC ProCharger setup w/intercooler on a stroked Lingenfelter 383 at stock compression in my GS before I dropped compression to 8.5 and went with a 6 lb. setup (lowered compression in hopes of running more boost... wanted 9lbs., but then the shop didn't want to mess with a cog or 8 rib setup without alot more expense... oh well). I do miss the higher compression though! I agree, don't clear 6 lbs. without an intercooler setup at least. Mine ran fine with the intercooler at 5 and stock compression.
Safety Car
Joined: May 2003
Posts: 4,283
Likes: 0
From: Houston Texas
Re: Supercharging an LT4 (crewzenLT4)
Forgive me for quoting a catalog but Carroll Supercharging "claimed" 500 hp with 8 lbs of boost, 30 lb injectors,water injection and custom programming at 6250 rpm. Maybe somebody who has first hand knowledge will chime in.
Instructor
Joined: Aug 2003
Posts: 102
Likes: 0
Re: Supercharging an LT4 (BAM92)
I gotta be honest, I didn't get it on the dyno before I had a tranny incident that resulted in a spun bearing and I did the work while everything was torn down. The guy I bought the car from claimed 550 hp, but I have some doubts. The car runs alot better now than it did then, but granted I'm not sure if it's running more or less power since I didnt' get it on the dyno first. The night I broke it I was on it good and it was pushing so much power/torque that it forced the blood out of my hands and they went kinda numb like. I haven't felt it do that anymore and figure it probabbly has less torque now. Oh well, I hope that long tubes will help some with that! The spun bearing was b/c of the tranny not being willing to go into 5th... and after 3 or 4 tries... the next one found a gear... but 3rd. She's like new now and running strong, but the tranny was what caused the whole ordeal. It has since been rebuilt as well and is like new + some!
