How much lift can L98 heads support?
#1
Supreme Member
Thread Starter
Join Date: Dec 2001
Location: Nebraska
Posts: 1,532
Likes: 0
Received 0 Likes
on
0 Posts
How much lift can L98 heads support?
I'm putting in a zz4 cam that has .474/.51 lift. will my stock L98 heads handle that much lift? and if not what all do I need to do to em so they can? or should I just buy new heads? thanks
#4
Member
Join Date: Nov 2000
Location: Tecumseh,Mi,USA
Posts: 474
Likes: 0
Received 0 Likes
on
0 Posts
I just had my heads worked on and the machine shop said that my heads would only handle .460 lift before the retainers hit the valve seals. So they had to cut down the valve guides to provide more clearance. I have not seen anyone else have this problem, but I did. I have an 89 L98.
nick
nick
#5
Junior Member
Join Date: Mar 2002
Location: Austin TX
Posts: 17
Likes: 0
Received 0 Likes
on
0 Posts
I just had the same problem same cam w 1.6 roller rocker lift .510/.524 I had to have evertything machined down I was told the stock springs would break after about .420 lift consistantley
#6
Supreme Member
Join Date: Nov 2001
Location: Cleveland, OH
Posts: 1,526
Likes: 0
Received 0 Likes
on
0 Posts
Car: '87 Camaro LT
Engine: 355 L98
Transmission: T56
i just put in an lt4 hot cam (.492 lift) on my vette l98. i had the guides cut .050" and used new high lift springs that fit the stock spring seat.
Thread
Thread Starter
Forum
Replies
Last Post