o2 problem (EFI Connection conversion)

[Phantom409]

what springs are in it?
how much lift?

The valve springs are from Lazer Cams, same place I got the cam from.
I have no card or specs on them at all so at some point I'm going to pull one off and have it checked.

Yes, I'm at 3/4 past 0 but every time I loosen them up they clack like crazy.
Rockers are Comp Pro Mags, Full Roller, 1.6 ratio.

I can loosen them a bit but I don't want to go to much.

[Phantom409]

what evidence is there that the springs are weak?

Even if the springs are weak, and i see no reason to believe they are, he has his valve lash set to 3/4 turn past zero. To my knowledge that is within spec but on my car that was NOT an optimal adjustment. As i recall it was starting to pressurize the valve stem if I went beyond 3/4 turn at all. Even if springs are a suspicion try loosening up the valve lash first, it cant hurt. Some people run as little as 1/8 turn with no problems.

I believe mine are set to 1/3 turn past zero lash.

Evidence is in the dyno run and a flat line in the pwr band at 4500 RPM both times.
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I had Eric with me the 2nd time I went and between the 3 of us (Me, TJ & Eric) came to the conclusion that valve springs could or are the problem.

My cam is a 228/234 @.050 .565/.557 lift w/ 108 LSA 104ICL

[JoeliusZ28]

The valve springs are from Lazer Cams, same place I got the cam from.
I have no card or specs on them at all so at some point I'm going to pull one off and have it checked.

Yes, I'm at 3/4 past 0 but every time I loosen them up they clack like crazy.
Rockers are Comp Pro Mags, Full Roller, 1.6 ratio.

I can loosen them a bit but I don't want to go to much.

alright then that isnt the problem if they clack on a looser setting. Thats fine though, one more possibility eliminated.

[prorac1]

Yeah, I had the same thought Joel, cause mine are crane gold/gmpp rockers, and mine are set at about half turn. Im pretty sure that his valve springs are getting weak. If you could see the whole graph like I did youd see it for sure. Its a classic dyno graph of bad valve springs. On one run the tq fell off and the hp went dead flat from 4500 to 6000 rpm. And thats where he should be coming in to the power. Eric L

[JoeliusZ28]

time for a set of PAC1218s then!

[Phantom409]

Who sells PAC?
What about Nitrated Beehives?

[1BADAIR]

stock yellow ls6 would even work

[sman]

Lots of places sell PACs, I just put 1218's on my car. The 1218's are a Nitrated Beehives.

[prorac1]

I would get the heads checked before I sunk a ton of money into springs and setup, etc. Make sure the ports are ok. Eric L

[1BADAIR]

ports? did they get epoxied at some point? if not throw some spring at it. 15 minute job

[prorac1]

He has dual valve springs, and head studs. Do they make a valve spring changer that you can use on the car for dual valve springs? To my knowlage they dont. Me and kyle were just talking about that the other day and we didnt thing they made one. Eric L

[prorac1]

Oh, and btw Larry....................thats a sweet ass converter, what kind is it. Eric L

[1BADAIR]

the flat plate "larry tool" or "tim" works fine for duals

[1BADAIR]

Oh, and btw Larry....................thats a sweet ass converter, what kind is it. Eric L

the expensive kind

[Phantom409]

Got the harnesses on the car and the car runs very nice