why the hell am i down on power
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From: Okinawa, Japan
why the hell am i down on power i made 420rwhp 396rwtq last time at the dyno since then ive added a flowtech 3" cutout and a shaner s3 tbody and i went to the dyno and only made 407rwhp 382rwtq......my a/f looks a little weird at the beginning of the graph 2500rpms the a/f is like 14:1(which i know is lean) and its a steady angle down to about 12.8:1 at 6600rpms last time i went to the dyno it was pretty flat across the line at 13.2:1 or so......cutout closed it only made 399rwhp so thats down 20rwhp.....what the hell any ideas?
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987 valve springs w approx 5k miles on them.....were you speaking of exhaust vacuum leaks?.....graph indated not gettin any valve float.....i guess it would be easier to post a pic of the dyno sheet
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oh yea when i did 420 i had factory ws6 wheels with 275 40's on it, this time was with 18x9.5 z06 wheels with 285 35s on it......i know i didn't lose that much through the wheels and i was hoping that the cutout and tbody would at least soak up the loss for the wheels....regaurdless my a/f still looked a little funny...ill try to get a pic up soon, and ill be heading to the dyno for further tuning but before then i think i might give the lsx intake and a FMS cam a try then tune
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Originally Posted by Kurtomac
987 valve springs w approx 5k miles on them.....were you speaking of exhaust vacuum leaks?.....graph indated not gettin any valve float.....i guess it would be easier to post a pic of the dyno sheet
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Thread Starter
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From: Okinawa, Japan
X-ER 224 581 112+2 comp cam.....heads were at TEA approx 1500miles ago spring pressure was good.....and no valve float on the dyno....ill check for leaks in the intake area....where is a common place to find leaks(be specific)
