Quote:
Originally Posted by al lkosmal
Nux,
Greetings and excellent work on your part. You may need more return spring, but, one thing I've found with the Speed Triples is that you may need to loosen the two screws that fasten the butterflies to the shaft and then let the spring force close the butterflies. this tends to help to self-center the butterflies in the ITB to minimize any rubbing/friction caused by them not being perfectly centered in the throttle body.
Make sure you have the ITBs balanced well. Follow Clay's guide to getting them balanced. The next thing is to datalog and review what is happening to your AFRs ...backfires thru the stacks typically indicate,,unbalanced ITBs, bad timing and/or lean conditions...while popping thru thru the exhaust is often a rich condition.
MAP readings are in kPa and not in % and can be higher with ITBs than common plenum.
regards,
al
|
Thanks Al - I'll try that. I did set the ITB's up according to Clay's guide, and it runs quite well. It seems that MAP is way over 100, which may in part explain why my tune is somewhat off. At idle I'm seing MAP 40-60, whereas with plenum it was more like 20-40. So my initial AFR ratios are currently not correct.