4200 wall thickness
pressed in factory sleeve 0.06"
aluminum barrels the sleeves are pressed into about .12"
Should you put darton sleeves in - I did. You may say that I only am going to say 8 psi.... that was good now I want more ... Unless the engine is built right in the first place this is when the problems start.
I look at them like good insurance.
What I did was get the engine installed and running NA - did a tune then added the turbo and re-tuned this way if I had any engine issues I could sort them out seperate from the turbo install.
As for tuning - if your going to use GM electronic it takes a different set of knowledge than using an aftermarket system.
If you are coming to the convention - come and watch the TBI conversion that I will be doing on the grand prize engine. You can watch and test drive the tuning s/w.
Once you see it once you will get it. It's not hard - just need to twist the way you approach tuning a bit different.
Last edited by efi-diy; 06/12/10 02:39 PM.
