The Cormaro......

[Jim Nilsen]

Originally Posted by GregWeld

When you have the intake manifold off - make sure you do a forensic tear down -- look at the gasket area for any signs of a leak... pulling oil or oil vapors into the intake can reek havoc on the O2 sensor...

Also - make sure you're valve spring rates match your cam... overlook this at your own peril (or the cams peril...)

I assume you're using a dual sync distributor? Ingition timing controlled by the ECM...

If you're using Accel Gen 7 ECM - have you tried using the VE table estimator function? Also - if your motor is "similar" to many motors built these days - there are tables / tunes - already loaded with the software - have you looked at any of them - and tried any? They're a good way to get a "base" tune - as far as AF ratio and timing etc and then just tweak the VE's where they may be needed.

I am checking my spring pressures to be sure but believe I should be ok, the cam lift is within .020.

yes I am using a dual sync and am still not 100% sure it is working like it should but it is reving to 6k vs 3k the first time out of the box. Do your cam and crank sensor lights come on and stay on in you diagnostics page when you rev it up or do they go white? Mine flash but not in any kind of firing sequence.

The VE estimator was so far off it was a joke. I am using the autocal button and it seems to want to change its mind like a woman in a shoe store. It likes one setting on the way up from idle and another on the way down each done right after the timing stabilizes. The cam and lifters are varying that much.

I am really hoping the swap will go straight forward like it should and if I need to get new springs I will.

Thanks