LT5 Assembly Project

[LGAFF]

Gag order right now. Lets see how she does

[Locobob]

Originally Posted by LGAFF

Gag order right now. Lets see how she does

Don't make me call Pete

I'm still kicking around doing something with my cams, I'll be watching with great interest.

[-=Jeff=-]

I know now

[XfireZ51]

I'm not convinced that a 5.7L motor needs more exhaust timing when
the I:E ratio is already very good. It should prove a worthwhile compare between my heads combo v what Lee is doing.

[Pete]

Originally Posted by Locobob

So what was your thinking behind this choice?

Bob, the cams Lee has found are basicly the same as the ones that were in my Z at Bowling Green the past 2 years.

I had .236 .425 In .220 .425 Ex i ran 128-129 with these and car drove very very nice.

I think Lee is on to something,will be waiting to see this set up i think it will work just fine or at least be worth 20-25 hp.

Pete

[LGAFF]

Cams arrived safely, my cam guy said if you are reusing lifters, you are asking for trouble.......new lifters are essential on any cam change. This guy has made cams for some of the fastest cars in the world, ferrari, Bugatti, etc

[-=Jeff=-]

Originally Posted by LGAFF

Cams arrived safely, my cam guy said if you are reusing lifters, you are asking for trouble.......new lifters are essential on any cam change. This guy has made cams for some of the fastest cars in the world, ferrari, Bugatti, etc

but are you lifters tall enough?

[LGAFF]

Since the heads have had 2 valve jobs, might work out fine with the change in base circle.....a lot of lifter options out there. Mine are actually too tall as is

[Locobob]

Originally Posted by Pete

Bob, the cams Lee has found are basicly the same as the ones that were in my Z at Bowling Green the past 2 years.

I had .236 .425 In .220 .425 Ex i ran 128-129 with these and car drove very very nice.

I think Lee is on to something,will be waiting to see this set up i think it will work just fine or at least be worth 20-25 hp.

Pete

Yeah I was thinking the specs were pretty close. Be interesting to see if Lee's project yields similar results to yours.

[Locobob]

Originally Posted by LGAFF

Since the heads have had 2 valve jobs, might work out fine with the change in base circle.....a lot of lifter options out there. Mine are actually too tall as is

So how much base circle did you lose in the process?

I had thought about deep seating the valves a bit to make up for some base circle loss. I suppose if you rework the chamber a bit around the seats you would not lose any flow by doing so.

I devised a pretty handy little measuring tool for checking valve height - 1.125in OD copper pipe with a hole drilled through the center. It fits nicely in the bearings and allows me to run a dial caliper stem down the hole to the top of the valve. I've played with it quite a bit and it is very repeatable.