VoyForums
[ Show ]
Support VoyForums
[ Shrink ]
VoyForums Announcement: Programming and providing support for this service has been a labor of love since 1997. We are one of the few services online who values our users' privacy, and have never sold your information. We have even fought hard to defend your privacy in legal cases; however, we've done it with almost no financial support -- paying out of pocket to continue providing the service. Due to the issues imposed on us by advertisers, we also stopped hosting most ads on the forums many years ago. We hope you appreciate our efforts.

Show your support by donating any amount. (Note: We are still technically a for-profit company, so your contribution is not tax-deductible.) PayPal Acct: Feedback:

Donate to VoyForums (PayPal):

Login ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 1 ]
Subject: Re: which valves to buy?


Author:
BuRn__
[ Next Thread | Previous Thread | Next Message | Previous Message ]
Date Posted: 19:19:41 01/19/03 Sun
In reply to: BuRn__ 's message, "which valves to buy?" on 10:27:21 01/19/03 Sun

im not gonna port the head, but was told when i take it to have it machined to "mill your head to minimal tolerances". would that have any effect on the valves? also, i plan on replacing the valves and all that stuff myself, just taking it to a shop to have it machined. is there n e thing i should watch out for?

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Replies:
[> [> Subject: Re: which valves to buy?


Author:
tonyz2897
[ Edit | View ]

Date Posted: 11:19:40 01/20/03 Mon

I wouldn't go any farther than what's necessary to get the head back into spec as far as the flatness of the gasket surface. Planing excessive material off of the head will increase your compression ratio which would increase your octane requirement at high boost. In other words, increase the compression too much and you may get detonation with pump gas at a boost pressure that you would otherwise be able to run. I've also heard that compression made with boost makes more power than the equivalent static compression. I have never seen documentation to back this up though.
Tony

[ Post a Reply to This Message ]
[> [> [> Subject: Re: which valves to buy?


Author:
BadAndy
[ Edit | View ]

Date Posted: 07:53:03 01/25/03 Sat

That's not the worst of it.....you forgot the fact that milling changes your camshaft timing as the area between pullies has been shortened.

[ Post a Reply to This Message ]


Post a message:
This forum requires an account to post.
[ Create Account ]
[ Login ]
[ Contact Forum Admin ]


Forum timezone: GMT-8
VF Version: 3.00b, ConfDB:
Before posting please read our privacy policy.
VoyForums(tm) is a Free Service from Voyager Info-Systems.
Copyright © 1998-2019 Voyager Info-Systems. All Rights Reserved.