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Old 06-30-2011 | 04:31 AM
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6stringer
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From: MN, MN
Default Beginner Tuning Question



I took my recently built Savage X SS out last night for it's 1st hard driving session as I wrapped up the break in procedure last weekend. Everything went great.

One quick question about tuning. I thinkI figured it out, but just want to make sure.

When doing high speed runs the engine would lose power until I let off the throttle. It only would happen whenI gave it full throttle and only after it reved up for a few seconds.If I slowly built up speed all the way to full throttleit wasn't as severe, but ultimately it would happen. I brought it in and checked the engine temp and it was 310 degrees - way too hot.

I richened it and it fixed the problem.

SoI am guessing this was a situation where it was to lean and the engine wasn't getting enough fuel to continue to run? I am trying to figure out not only how to tune, but how things are affecting the motor so I can understand what is happening, and not just which way to turn the needle.

After last night Ican see why tuning an engine is an art with a learning curve.I warmed the engine up at a baseball field and got it running great - good response, punchy acceleration, etc. Well,Imoved spots to a construction zone, got the car out and it was then running to rich. It took all of 15 minutes to change locations and the tune was already in need of small adjustments. Also, it's amazing how much change in performance just an 1/8 of a turn of the HSNdoes when you are near the "sweet" spot.

Thanks
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