Inline 250 - T3 Turbo - w/ Video

[cAlvis165]

Originally Posted by boucher racing

Yes, I am running a HEI with the vacuum adv. plugged. First, I made a lockout plate for the HEI and it ran like sh**. Then, I put a HEI weight advance kit on it with the lightest springs. I have a dial back timing light and figured out that it was "all in" early (around 2000 rpm's) at 25 degrees. My initial is set at 10 deg and the mechanical advance gives it another 15 deg. (25 total)

With my setup, I have it running on the rich side and have never had any detonation yet. I have the wastegate set at 10 psi. If I were to run more boost, I would most likely get a BTM box to remove timing, but where I am running it, there is no need. For my setup, it is right at its sweet spot.

I hope this makes sense.

Boucher'

Thanks for taking the time to spell it out. Chevy's are my first love, but I'm thinking about turbocharging an old International Harvester 266. Its a beast in the low end but needs help up top. The old binders don't move much air, I would only need a Holley 2300 350 cfm to feed it. I need to figure out what to do for timing though. Thanks for all the info in this thread.