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  1. #1
    ncdoo's Avatar
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    Finally in the 80 mph club!

    Best I saw on GPS was 81mph @ 8550! Temp was 84 so the air was good. Had to repitch the prop since I was on the limiter. AFRs was right on at 12.3 @WOT and 15 lbs of boost.


  2. #2
    boost junkie skidoochris's Avatar
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    12.3 is on the edge with pump fuel

  3. #3
    AtoMIC_OraNGE greenbullet's Avatar
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    What Ecu?

  4. #4
    shrabber's Avatar
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    You need fuel, if you got a rrfpr add some fuel!!!

  5. #5
    dnielsen's Avatar
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    Great speed numbers but like stated above add some fuel or you'll be doing a rebuild.

  6. #6
    ncdoo's Avatar
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    I've got a RRFPR but I've got the vacuum/boost line clamped off. FP now at 58 psi. With the RRFPR I couldn't get the AFRs up at WOT. I tried more FP (65psi) but the AFR were only at 11.5 at WOT. It real rich on bottom end 11.2, climbs to 12.0 when the boost kicks in. What AFRs am I shooting for? Its a Torx ecu.

  7. #7
    shrabber's Avatar
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    11.5 is not terrible at WOT, do not worry about rich down low, that's where most people get thrown off. If Your at [email protected] 11.5 kick it to 62 and see what You got.

    what injectors do You have might be a tad on the small side

  8. #8
    WickedXP's Avatar
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    Quote Originally Posted by ncdoo View Post
    I've got a RRFPR but I've got the vacuum/boost line clamped off. FP now at 58 psi. With the RRFPR I couldn't get the AFRs up at WOT. I tried more FP (65psi) but the AFR were only at 11.5 at WOT. It real rich on bottom end 11.2, climbs to 12.0 when the boost kicks in. What AFRs am I shooting for? Its a Torx ecu.
    Welcome to the club! I had similar fueling issues and discovered the OEM fuel pump just couldn't keep up and would sporadically fail.

  9. #9
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by ncdoo View Post
    I've got a RRFPR but I've got the vacuum/boost line clamped off. FP now at 58 psi. With the RRFPR I couldn't get the AFRs up at WOT. I tried more FP (65psi) but the AFR were only at 11.5 at WOT. It real rich on bottom end 11.2, climbs to 12.0 when the boost kicks in. What AFRs am I shooting for? Its a Torx ecu.
    You need larger injectors for WOT and CMD stuff to cleanup the bottom end and for datalogging.

  10. #10
    JT jpt7779's Avatar
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    12.3 AFR is .84 lambda and IMO is too lean at WOT. Your 50 # injectors are getting maxed out duty cycle and you are very near melting a piston. I am sure your EGT's are well over 1700*.

    Yes, great performance for speed runs but that engine won't last long running it like that.

    ID 1000 injectors with a proper map, Walbro or Aeromotive fuel pump and you will be safe.

    There is a very common theme in everyone's comments………..


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