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FM11 and PP ls6 stylr heads

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Old 06-17-2004, 06:36 PM
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pdd
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Default FM11 and PP ls6 stylr heads

thanks don(slowhawk) u did an awesum job. idle is mint, no surging. i put down 415rwhp and 390rwtq with a z06 catback with 90 degree humid shi$$y weather. i very happy and the car is sooooo streetable. a few pics but my dyno chart is hard to read
http://www.picturejudge.com/memberpi...s/IM000308.JPG
http://www.picturejudge.com/memberpi...s/IM000310.JPG
Old 06-17-2004, 06:53 PM
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funky lookin tq curve
Old 06-17-2004, 08:40 PM
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Cool Pat, now you gonna start driving that thing?
Old 06-17-2004, 10:03 PM
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Originally Posted by foff667
funky lookin tq curve
because its on the 114 i think
Old 06-17-2004, 10:05 PM
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Originally Posted by JoeyGC5
Cool Pat, now you gonna start driving that thing?
hell ya
Old 06-18-2004, 03:53 AM
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Originally Posted by pdd
because its on the 114 i think
no, it looks like major detonation.....or something of the sort, you're missing a buttload of mid-range power. All a 114 LSA does vs. a 112 or lower LSA is shift the entire power band a few hundred RPM's higher, it does not take huge chunks of power away like your graph shows.

Your a/f ratio is a bit lean and I bet you're getting detonation, hense knock retard.
Old 06-18-2004, 04:39 AM
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Originally Posted by verbs
no, it looks like major detonation.....or something of the sort, you're missing a buttload of mid-range power. All a 114 LSA does vs. a 112 or lower LSA is shift the entire power band a few hundred RPM's higher, it does not take huge chunks of power away like your graph shows.

Your a/f ratio is a bit lean and I bet you're getting detonation, hense knock retard.
i would assume the tuner would of taken care of any detonation and KR if it were present. you are right though, he's missing an *** load of low end and mid range. hits 300rwtq @ ~2400 but doesnt hit 350rwtq until ~ 3800 rpm. i'd expect that out of maybe a Trex cam only setup but not an FM11 which are known for some great under the curve tq with stock and ported heads.

Last edited by jrp; 06-18-2004 at 07:24 AM. Reason: incomplete thoughts and spelling
Old 06-18-2004, 05:49 AM
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Originally Posted by jrp
i would assume the tuner would of taken not of any detonation and KR if it were present. you are right though, he's missing an *** load of low end and mid range. hits 300rwtq @ ~2400 but doesnt hit 350rwtq until ~ 3800 rpm. i'd expect that out of maybe a Trex cam only setup but not an FM11 which are known for some great under the curve tq and some heads.
There was no detonation causing that dip.Was just an affect of his setup.If you notice the HP curve was smooth,torque took a dip.(plus I scanned it)Tried a wide range of timing/A/F across that area with no affects to the dip area.Could be an affect of the light flywheel/dyno setup that could give the reading like that.Corvettes can be a little funky on the dyno.
Old 06-18-2004, 06:49 AM
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How was the timing in the midrange? I had a similar dip on my old setup and with the predator Coastal Dyno and Chassis got rid of that dip and I picked up a boat load of midrange. Trust me. That dip can be removed and replaced with power..
Old 06-18-2004, 07:04 AM
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Originally Posted by VINCE
How was the timing in the midrange? I had a similar dip on my old setup and with the predator Coastal Dyno and Chassis got rid of that dip and I picked up a boat load of midrange. Trust me. That dip can be removed and replaced with power..
How about changes from 14 degree's to 30 degree's.Made very little difference. It is just the setup.No big deal.
Old 06-18-2004, 07:11 AM
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Nice HP curve, but I kind of agree with the other guys on the torque curve. When I changed my stock timing table to a table that Chris Robinson did for me, I gained a bunch of area under the torque curve in the low/mid range. Check out my recent dyno sheet. Your cam should be better in the low/mid than mine since it's a tad smaller and on a wider LSA. But you're down 50 ft-lbs almost all the way up to 4000 rpm.

https://ls1tech.com/forums/dynamometer-results-comparisons/180113-fms-f13-vs-tr224-dyno-results-inside.html

I'd think an aluminum flywheel would show a torque increase too, not decrease it, since you have less rotating mass.

Wierd.




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