LT1 12.1 Boost??

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Jan 9, 2012 | 11:01 PM

Green3spd

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From: Little Rock, Ar

LT1 12.1 Boost??

Purchased a 396 shortblock sometime last year. Assy will go underway soon. I've seriously considered getting rid of the nitrous and going with a Vortech.

My main concerns are boost + 12.1 CR.
Will 93 octane be ok with this? What kind of boost should I expect to feed a shortblock with that much pressure.
I keep being told(by one person) I'll have to run some sort of race fuel or E85 for this set up.
Is 12.1 CR + boost + 93 Not ideal?
My heads and Cam are not get finished so those items can be adjusted to the setup still.

Thanks for any info!

Jan 9, 2012 | 11:06 PM

lt1slowz28

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there was just a recent thread about high compression and boost... try a quick look for it.

Jan 9, 2012 | 11:08 PM

jaycenk

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From: Holiday, FL

What piston is in it?

Jan 10, 2012 | 07:50 AM

ahritchie

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Read> https://ls1tech.com/forums/lt1-lt4-m...hos-doing.html
Not gonna happen with 93 octane

Jan 10, 2012 | 08:09 AM

stumprrp

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Yeah, close this before all the master mechanics rip you to shreds, lol. Seriously though i talked to one of my mechanics who IS a master and he confirmed i would need pure race gas.

Jan 10, 2012 | 08:27 AM

ahritchie

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Why not just spray it if you want more hp? It would actually be safer than boost if setup properly, high compression and nitrous are your friends.

Jan 10, 2012 | 09:18 AM

96TransAmboosted

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I don't think it matters what pistons are in the block with 12.1 + boost. That motor wont last very long at all. Even with meth a cooler and 110 keeping timing down will all just be a waste. Best thing to do would be to sell that engine and either biy a ready FI engine or completely rebuild the one you have. Anything over 9.5/1 is a waste on a FI engine and limits the amount of boost you can run safely. Why only run 5psi and be blown away by NA cars. Or build it to handle 10-20 and destroy just about anything on the road.