max compression with 8 PSI
Thread Starter
I ♥ Acer
Joined: Jul 2004
Posts: 2,042
From: Suwanee, GA
max compression with 8 PSI
this might sound weird but i want to know if a 4.2 forged stroker with 10:1 compression could run 8-10 PSI with an intercooler. i don't like big boost, it facks **** up.
Joined: Jan 2005
Posts: 13
RE: max compression with 8 PSI
way to much compression i a have a super coupe and that has 8.2 to one compression and it is putting out about 14 to 15 psi.The shop that i went to said a good rule of thumb is to take 1 pound compression away for the engine for every 5 pounds of boost. i know that is not true for every application but he said for the engines us common foke are building it is a pretty good guide line to stick with.
Just my 2 cents
Just my 2 cents
Thread Starter
I ♥ Acer
Joined: Jul 2004
Posts: 2,042
From: Suwanee, GA
RE: max compression with 8 PSI
ORIGINAL: supercouper
way to much compression i a have a super coupe and that has 8.2 to one compression and it is putting out about 14 to 15 psi.The shop that i went to said a good rule of thumb is to take 1 pound compression away for the engine for every 5 pounds of boost. i know that is not true for every application but he said for the engines us common foke are building it is a pretty good guide line to stick with.
Just my 2 cents
way to much compression i a have a super coupe and that has 8.2 to one compression and it is putting out about 14 to 15 psi.The shop that i went to said a good rule of thumb is to take 1 pound compression away for the engine for every 5 pounds of boost. i know that is not true for every application but he said for the engines us common foke are building it is a pretty good guide line to stick with.
Just my 2 cents
5th Gear Member
Joined: Mar 2004
Posts: 3,594
From:
RE: max compression with 8 PSI
well justin at VMP ran 17psi on stock 99+ pistons with 100 octane gas.
the key is the tune. no detonation no problems. forged 9.0:1 will handle 20psi just ask Dan Haga. 9:1 20psi gave him 400+rwhp with his vortech.
big boost doesn't screw things up. an improper tune at high boost screws things up
7 psi and a bad tune will wreck just about any engine before long.
don't fear boost. it is your friend when tuned properly. buicks run about 7.5-8.5:1 at 25psi+
the key is the tune. no detonation no problems. forged 9.0:1 will handle 20psi just ask Dan Haga. 9:1 20psi gave him 400+rwhp with his vortech.
big boost doesn't screw things up. an improper tune at high boost screws things up
7 psi and a bad tune will wreck just about any engine before long.
don't fear boost. it is your friend when tuned properly. buicks run about 7.5-8.5:1 at 25psi+
Thread Starter
I ♥ Acer
Joined: Jul 2004
Posts: 2,042
From: Suwanee, GA
RE: max compression with 8 PSI
ORIGINAL: cobra232
well justin at VMP ran 17psi on stock 99+ pistons with 100 octane gas.
the key is the tune. no detonation no problems. forged 9.0:1 will handle 20psi just ask Dan Haga. 9:1 20psi gave him 400+rwhp with his vortech.
big boost doesn't screw things up. an improper tune at high boost screws things up
7 psi and a bad tune will wreck just about any engine before long.
don't fear boost. it is your friend when tuned properly. buicks run about 7.5-8.5:1 at 25psi+
well justin at VMP ran 17psi on stock 99+ pistons with 100 octane gas.
the key is the tune. no detonation no problems. forged 9.0:1 will handle 20psi just ask Dan Haga. 9:1 20psi gave him 400+rwhp with his vortech.
big boost doesn't screw things up. an improper tune at high boost screws things up
7 psi and a bad tune will wreck just about any engine before long.
don't fear boost. it is your friend when tuned properly. buicks run about 7.5-8.5:1 at 25psi+
Administrator
Joined: Dec 2003
Posts: 26,064
From: Southern California
RE: max compression with 8 PSI
ORIGINAL: cobra232
well justin at VMP ran 17psi on stock 99+ pistons with 100 octane gas.
the key is the tune. no detonation no problems. forged 9.0:1 will handle 20psi just ask Dan Haga. 9:1 20psi gave him 400+rwhp with his vortech.
big boost doesn't screw things up. an improper tune at high boost screws things up
7 psi and a bad tune will wreck just about any engine before long.
don't fear boost. it is your friend when tuned properly. buicks run about 7.5-8.5:1 at 25psi+
well justin at VMP ran 17psi on stock 99+ pistons with 100 octane gas.
the key is the tune. no detonation no problems. forged 9.0:1 will handle 20psi just ask Dan Haga. 9:1 20psi gave him 400+rwhp with his vortech.
big boost doesn't screw things up. an improper tune at high boost screws things up
7 psi and a bad tune will wreck just about any engine before long.
don't fear boost. it is your friend when tuned properly. buicks run about 7.5-8.5:1 at 25psi+
5th Gear Member
Joined: Mar 2004
Posts: 3,594
From:
RE: max compression with 8 PSI
ORIGINAL: matthockey32
where can i find one?
ORIGINAL: cobra232
it will hold just fine.
throw a bottom end girdle in for good measure
it will hold just fine.
throw a bottom end girdle in for good measure
also i believe www.rpm-mustangs.com has them
a 4.2 truck block girdle may work as well but i'm not positive
Thread
Thread Starter
Forum
Replies
Last Post
jwog666
Pipes, Boost & Juice
11
Dec 27, 2021 08:09 PM
