Hey Tom:
Nice videos!
Hope you don't mind me jumping in on this thread with a question of my own, but maybe it will help others ,too.
In your walkaround, i think i heard you say you were running .030 plug gap to keep the turbo from blowing them out.
I know you have already said it elsewhere, but how much boost you running? I knew you were supposed to run reduced gap for boosted applications, but i didn't realize you needed to go that far. My 250 is running Splitfire coppers (heat range = AC R44XLS) at .046" off a GM HEI, 7PSI boost, and it just seems to smother out at WOT above 4000rpm. I'm running a stock mechanical fuel pump, so I just figured I was running out of gas. Plus, it's a street driver, RARELY revved like that anyhow, so i just haven't been concerned about it. Think plug gap is the culprit??
Thanks for your thoughts.
Well, it's almost a year later, and I finally got around to figuring out my "smotherin" problem: exhaust backpressure!
Uncapped the headers and ran it thru the gears a coupla times and the little 6 screamed!(new videos attached) First time it has ever wanted to wind 5G's!
I had a feeling that was the problem from the way it sounded, but just couldn't believe dual 1 3/4" exaust thru 2" turbo mufflers would be that restrictive for 250ci.
Anyhow, food for thought if you're planning on building a forced induction system.
http://www.youtube.com/watch?v=6mD6nt3SFoUhttp://www.youtube.com/watch?v=Gq8F_cia0ishttp://www.youtube.com/watch?v=JcSBNdM7-Xs
