When to use longer valves?
Thread Starter
Junior Member
Joined: Nov 2008
Posts: 10
Likes: 0
From: Dresden, OH
Car: 1992 Camaro RS
Engine: 350
Transmission: 700r4
Axle/Gears: 3.42
When to use longer valves?
I am trying to decide to rebuild a set of stock heads and I am curious as to when or if you need longer than standard length valves? I'll be using comps XE268 cam (flat tappet), so there is not really that high of a lift. I will also be using the springs the Comp calls for to match the cam.
I am keeping this on the cheap since I already had these heads laying around. I hope in the near future I'll be able to get some better heads.
Thanks
I am keeping this on the cheap since I already had these heads laying around. I hope in the near future I'll be able to get some better heads.
Thanks
Moderator
Joined: Jul 1999
Posts: 17,265
Likes: 168
From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: When to use longer valves?
You need longer valves when you use a camshaft that requires a valve spring with a higher installed height. Using longer valves also requires different length pushrods to maintain the valve train geometry.
Thread Starter
Junior Member
Joined: Nov 2008
Posts: 10
Likes: 0
From: Dresden, OH
Car: 1992 Camaro RS
Engine: 350
Transmission: 700r4
Axle/Gears: 3.42
Re: When to use longer valves?
Thanks ... I have to check my pushrod length anyways because of the block being decked (I think .009).
Is the factory spring height is 1.70?
Is the factory spring height is 1.70?
Thread
Thread Starter
Forum
Replies
Last Post
355tpipickup
Tech / General Engine
9
Sep 13, 2015 11:35 PM
