LT1's LOVE blowers!!!!!
TECH Apprentice
Joined: Feb 2005
Posts: 384
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That must have been some good stuff. 
In all honesty, that question is a little too vague to answer. Too many variables. How much boost? Intercooled? How much mileage? How hard will it be driven? Good dyno tune, or something cheap and generic?
Generally speaking, no, a high-compression motor using hypereutectic pistons is exactly what you DONT want for a good blower buildup. That's not a good combination for anything other than really low-boost levels. Otherwise, it's a ticking time bomb. Could be a month getting thrashed around with 9psi, or it could be two years driving like a granny with 4-6psi. The ring lands generally don't hold up, from what I've read.
I wouldn't even consider a blower without building up the bottom end. Which, is exactly what I'm doing...
In all honesty, that question is a little too vague to answer. Too many variables. How much boost? Intercooled? How much mileage? How hard will it be driven? Good dyno tune, or something cheap and generic?
Generally speaking, no, a high-compression motor using hypereutectic pistons is exactly what you DONT want for a good blower buildup. That's not a good combination for anything other than really low-boost levels. Otherwise, it's a ticking time bomb. Could be a month getting thrashed around with 9psi, or it could be two years driving like a granny with 4-6psi. The ring lands generally don't hold up, from what I've read.
I wouldn't even consider a blower without building up the bottom end. Which, is exactly what I'm doing...
Staging Lane
Joined: Jan 2005
Posts: 98
Likes: 0
From: Orlando (UCF), Florida
Depends on how many miles on it, how much boost, how you drive it, and the condition of everything else. Prepare for a rebuild if you put a blower on a stock engine. BTW, the high compression of an lt1 does not like boost, and the pistons don't like to hold their own either.
Ryan
Ryan
well I at least know the stock LT1 will take it for some time from Keith Mease's expirements. Stock Long block w/ over 250+ on it just new gaskets (rotating assembly untouched), and a close to stock reground cam. Stock Iron heads that were cleaned up w/ new valve stem seals and springs. Twin Screw Roots Blower off the lightning (Eaton M112?). He had well over 5,000 miles on the setup running 8-10 psi (non intercooled) and besides the fact it had serious blowby from the high mileage, it ran just fine. I would still suggest what's already commented. Build a motor meant for boost 
Originally Posted by Saad06
i onno man..them damn LT1 blocks can hold their own pretty damn good... but yeah... forged internals is recommended for high boost.. thats what im going to do if i get bored/rich
Joined: Nov 2001
Posts: 10,023
Likes: 6
From: LT1 land...the "409" of the 90s!
As long as you stay under 8Psi and do not drive them hard they will last.
You get much over that and the pistons give up....thats How I lost my first motor
You get much over that and the pistons give up....thats How I lost my first motor
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Originally Posted by TwoFast4Lv
As long as you stay under 8Psi and do not drive them hard they will last.
You get much over that and the pistons give up....thats How I lost my first motor
You get much over that and the pistons give up....thats How I lost my first motor
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TECH Enthusiast
Joined: Sep 2004
Posts: 595
Likes: 0
From: Clarksville,Tn
You have to watch detonation, as with any SBC. That means backing off on timing and possibly running race fuel if yer running alot of boost on the stock compression ratio. Compressed air heats up so if you have a non intercooled setup detonation will be even worse.
I haven't read the entire thread, so I'm not sure if this has been stated yet, but TYPICALLY, stock LT1's last for around 15,000 miles with boost. Obviously, this is not an exact number. This is just an average. It could vary greatly, but what this should tell you is that once you slap that blower on, your motor becomes a ticking time bomb. It you want a supercharger, and the power that goes along with it, your gonna have to pay a price for it. When it comes to boost, you'll need to build the engine for it. At a minimun this means lower static compression through the use of a forged dished piston, piston rings that are gapped properly for forced induction, bigger injectors and fuel pump, and a GOOD tune.
Raymond
Raymond
Originally Posted by '68LT1camaro
I haven't read the entire thread, so I'm not sure if this has been stated yet, but TYPICALLY, stock LT1's last for around 15,000 miles with boost. Obviously, this is not an exact number. This is just an average. It could vary greatly, but what this should tell you is that once you slap that blower on, your motor becomes a ticking time bomb. It you want a supercharger, and the power that goes along with it, your gonna have to pay a price for it. When it comes to boost, you'll need to build the engine for it. At a minimun this means lower static compression through the use of a forged dished piston, piston rings that are gapped properly for forced induction, bigger injectors and fuel pump, and a GOOD tune.
Raymond
Raymond
Joined: Nov 2001
Posts: 10,023
Likes: 6
From: LT1 land...the "409" of the 90s!
yup I would say 15k is Normal. I had the P600B also with the 12 rib belt and 2/3 core(one large *** cooler under the car) Smallest pully for that kit was 9Psi.
Was out playing one night, 40° foggy and we are sea level. Perfect boost weather....Gauge hit 11psi and three pistons gave up there ring lands...
I will agree my fault. Then again I drive my car not show it
Then there was the time the by-pass valve stuck closed and the blower let go threw the new motor but that is an entirely different story
Was out playing one night, 40° foggy and we are sea level. Perfect boost weather....Gauge hit 11psi and three pistons gave up there ring lands...
I will agree my fault. Then again I drive my car not show it
Then there was the time the by-pass valve stuck closed and the blower let go threw the new motor but that is an entirely different story
