5oo Hp 7 Psi Too Much
01-16-2006, 06:26 PM
#2
Registered
Re: 5oo Hp 7 Psi Too Much
Originally Posted by chad1
Stock 500 Hps B&m 420 Mega Blowers 93 Octane..can This Setup Handle 7psi . Go From 4 To 7 By Reversing The Pullys.. No Inercooler...
on the dash
01-17-2006, 08:33 AM
#7
Registered
Re: 5oo Hp 7 Psi Too Much
Chad,
I have been doing a lot of research on how much, reliable, boost to run on a marine engine. With 7 lbs of boost on your HP 500 engine your static compression is a little over 13 to 1. What I keep reading is where you want to set your engine for long term reliability is around 12 to 1 Effective compression (Effective compression is the calcuation of your compression ratio + the amount of boost you are going to run) . I just looked at a chart looking to answer your question the most boost you want to run with your stock HP 500 pistons is around 5 lbs. This will net you just over 12 to 1. If you go to Holley's web site and search around they have a bunch of blower technical information.
I hope this helps you out.
Greg
I have been doing a lot of research on how much, reliable, boost to run on a marine engine. With 7 lbs of boost on your HP 500 engine your static compression is a little over 13 to 1. What I keep reading is where you want to set your engine for long term reliability is around 12 to 1 Effective compression (Effective compression is the calcuation of your compression ratio + the amount of boost you are going to run) . I just looked at a chart looking to answer your question the most boost you want to run with your stock HP 500 pistons is around 5 lbs. This will net you just over 12 to 1. If you go to Holley's web site and search around they have a bunch of blower technical information.
I hope this helps you out.
Greg
01-17-2006, 10:39 AM
#8
Registered
Join Date: Jan 2005
Posts: 185
Likes: 0
Received 0 Likes
on
0 Posts
Re: 5oo Hp 7 Psi Too Much
Originally Posted by JCPERF
I would take it out and hold it on the dash
on the dashGreg, I don't mean to offend you but a boost level doesn't necessarily equate to a certain cylinder pressure. An engine that has a cam with 200 degrees of duration @.050" and pulley'd to 7 lbs of boost will not make as much cylinder pressure as the same exact engine with a cam that has 250 degrees of duration @.050" and pulley'd to the same 7 lbs of boost. A supercharger has to be thought of as another engine on top of the existing engine.
01-17-2006, 11:58 AM
#9
Registered
Re: 5oo Hp 7 Psi Too Much
Richard,
You may think my answer is funny, but I didn't see an answer from you.
Chad is looking for advice, and as I posted he can go to Holley's website and find what I am talking about.
You may think my answer is funny, but I didn't see an answer from you.
Chad is looking for advice, and as I posted he can go to Holley's website and find what I am talking about.
01-17-2006, 12:11 PM
#10
Charter Member # 55
Charter Member
Re: 5oo Hp 7 Psi Too Much
Originally Posted by GS42fun
Richard,
You may think my answer is funny, but I didn't see an answer from you.
Chad is looking for advice, and as I posted he can go to Holley's website and find what I am talking about.
You may think my answer is funny, but I didn't see an answer from you.
Chad is looking for advice, and as I posted he can go to Holley's website and find what I am talking about.
He said JC's post was funny, not yours.
He also gave advice/information. Cranking Compression is related to cam duration and I'll add also to the amount of timing you are running. Holley's site might give some basic tech info, but Holley does not build engines.
