L82 Mini Blower help
Thread Starter
Burning Brakes
Joined: Mar 2016
Posts: 1,008
Likes: 163
L82 Mini Blower help
Hey guys, I'm looking at picking up a rubber bumper C3 sometime this Spring or Summer. My plan was to get a cheap-ish L48 in decent condition that drove well so I could drive it around all year while I build up a motor in my garage. I was wanting to go with a mild 383 stroker with forged crank, pistons, and rods so that it could handle a mini blower (planning on using a Weiland 144).
However, I just learned that the L82 engined cars had forged crank and pistons from the factory. Would I be fine to just put some bigger aluminum heads on the L82 to bring the CR down and install the Weiland 144 on that motor?
If so that would definitely save me some money and time and I'm sure my wife would be happier if I wasn't taking up more garage space with a second engine.
Thanks.
However, I just learned that the L82 engined cars had forged crank and pistons from the factory. Would I be fine to just put some bigger aluminum heads on the L82 to bring the CR down and install the Weiland 144 on that motor?
If so that would definitely save me some money and time and I'm sure my wife would be happier if I wasn't taking up more garage space with a second engine.
Thanks.
Thread Starter
Burning Brakes
Joined: Mar 2016
Posts: 1,008
Likes: 163
Follow up question: when people talk about their motors "blowing" from running too much pressure from a forced induction application, what actually breaks? Is it rods and rockers? A piston? Or does the actual block crack from the pressure?
Basically just wondering if I were to run an engine with 9:1 compression and some mild boost (~8 PSI) and it were to "blow" whether the engine would be salvageable (or at least the heads, intake etc...). Thanks and sorry for the lack of knowledge on this subject!
Basically just wondering if I were to run an engine with 9:1 compression and some mild boost (~8 PSI) and it were to "blow" whether the engine would be salvageable (or at least the heads, intake etc...). Thanks and sorry for the lack of knowledge on this subject!
Drifting
Joined: Aug 2009
Posts: 1,346
Likes: 160
From: new iberia la
I m no expert on Forced Induction ,others here are probably better suited to answer your questions. but I would think 8psi boost would be ok with good fuel .. .. Pistons are the first to fail because of detonation or just too much boost .. My T-Bird had 12 PSI Boost and ran fine on 93 Octane
Burning Brakes
Joined: Jul 2015
Posts: 823
Likes: 57
From: Austin TX
Follow up question: when people talk about their motors "blowing" from running too much pressure from a forced induction application, what actually breaks? Is it rods and rockers? A piston? Or does the actual block crack from the pressure?
Basically just wondering if I were to run an engine with 9:1 compression and some mild boost (~8 PSI) and it were to "blow" whether the engine would be salvageable (or at least the heads, intake etc...). Thanks and sorry for the lack of knowledge on this subject!
Basically just wondering if I were to run an engine with 9:1 compression and some mild boost (~8 PSI) and it were to "blow" whether the engine would be salvageable (or at least the heads, intake etc...). Thanks and sorry for the lack of knowledge on this subject!
Race Director
Joined: Dec 1999
Posts: 11,096
Likes: 990
From: Sierra Foothills CA
You should get ahold of L-82kid. He did this mod and ran very well with it. He should be able to tell you a lot about what to do and what not to do. In case you can't reach him you can look at post #10 in this thread for some specifics-
https://www.corvetteforum.com/forums...questions.html
https://www.corvetteforum.com/forums...questions.html
Thread Starter
Burning Brakes
Joined: Mar 2016
Posts: 1,008
Likes: 163
Thanks for the help guys, this forum is awesome.
I'm thinking what I'll do is base my decision on what car I can find. If I find a decent priced L-82 4-speed for sale then I'll use that motor and but the mini blower on it. If all I can find is a 4-speed L-48 then I'll just drive it a bit and build a forged 383 on the side to put in it.
I'm thinking what I'll do is base my decision on what car I can find. If I find a decent priced L-82 4-speed for sale then I'll use that motor and but the mini blower on it. If all I can find is a 4-speed L-48 then I'll just drive it a bit and build a forged 383 on the side to put in it.
Thread Starter
Burning Brakes
Joined: Mar 2016
Posts: 1,008
Likes: 163
Hey another question for you guys. I'm planning to basically build a 383 to put in the car and eventually supercharge, but I would probably end up running the 383 for a year or so while I build up more funds to get the blower for it.
Will the engine be pretty weak if I build it with an 8.5:1 compression ratio (and a Cam geared more towards a blower) and run it without the blower for a while? Or would I be safe to build it to 9:1 compression if I'm going to run Aluminum heads and about 8 PSI boost?
Will the engine be pretty weak if I build it with an 8.5:1 compression ratio (and a Cam geared more towards a blower) and run it without the blower for a while? Or would I be safe to build it to 9:1 compression if I'm going to run Aluminum heads and about 8 PSI boost?
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