107" Power Problems

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May 23, 2012 | 07:39 AM

#41

DRAGO'S BIKE WORKS

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Its like we talked about on the phone. Check to see if your throttle blade is opening all the way. It almost looks like its not getting air into the motor. or fuel psi system. On your your graph it shows one afr is it front or rear cylinder how do both look at the same time. And I would do a leak down test just to confrim. Your comp is right on th money for that type of build. cant hurt to check......

Quote:

Originally Posted by $tonecold

Thanks for the comments, but yes I have checked for sumping, got a whole 2 oz. when the plug was pulled. As for the throttle plate, I have watched it and it looks to me like it is opening completely and the computer says it is on the TMax monitoring. And Iclick, this is about the coolest running engine I have ever seen. Even in this Az. heat it takes it 7 or 8 miles to get above 170 F. of oil temp. If the ambient is below 70 F it won't exceed 170 F oil temp in the 15 mile trip to work.
Just for an update, had the fuel pressure checked today and it is at 58 psi, dead in the middle of the range. The tech said the bleed down was good also. Again I'm at a loss. Not sure what to do now. I don't know if changing the throttle body and injectors would do anything, it's about the only thing I haven't done yet. I ran a hot compression check last night, 205 psi on both cylinders. It holds 193 or 194 when it is cold. I haven't done a leak down, but with that kind of compression I don't think a leak down will show a problem.