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Very Dissapointed with dyno results today...

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Old 06-10-2006, 04:02 PM
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At the crank they are good for probably 450-460...but not at the wheels. 28lb injectors with 450rwhp (over 500 at the motor)would be well over 100% duty cycle. And < 80% is considered the safe zone
Old 12-28-2006, 10:31 AM
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So, what ever happend with this guys motor/combo?
Old 12-28-2006, 01:48 PM
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I`m interrested also .... all I can think of is a maf or a sensor like the tps or something else screwing his numbers .... you service engine soon i on? or its lamp is fused maybe? no codes what so ever?
Old 12-28-2006, 03:03 PM
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Well, the poor guy doesn't have any tuning software so he's almost helpless beyond basic stuff. Really sucks for him. I guess I'm just curious.
Old 12-28-2006, 06:18 PM
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That poor guy (me) hasnt found anything wrong. 'm still running the stock injectors on my mail order tune. As soon as I get the money, I plan on adding a 90/90 setup with injectors and a dyno tune. Hopefully this combo will get me up to the 450-460 mark. I have ZERO codes, car runs good and strong, plenty of power, just the dyno numbers arent the greatest. I'm open to any other suggestions you all may have.
Old 12-28-2006, 06:37 PM
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didn't go through the entire thread, but have you tried to see if you have anything obstructing your exhaust flow - like broken up cat pieces in the y-pipe?
Old 12-28-2006, 06:50 PM
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http://motors.search.ebay.com/_W0QQsassZdeatschwerks

Good place to get injectors. They come flow matched with a flow sheet. I'm running them with good results.
Old 12-28-2006, 08:15 PM
  #168  
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Originally Posted by Grimes
didn't go through the entire thread, but have you tried to see if you have anything obstructing your exhaust flow - like broken up cat pieces in the y-pipe?
Tried dumping the pipes and dyno with open headers?
Old 12-29-2006, 06:06 PM
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The dyno was with gmmg catback and jet hot catted y-pipe...if you call them cats, more like rasp reducers. If you have clogged exhaust you can usually tell just by driving....but no I havent visually looked in the y-pipe.
Old 12-29-2006, 11:27 PM
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Originally Posted by joshp14
The dyno was with gmmg catback and jet hot catted y-pipe...if you call them cats, more like rasp reducers. If you have clogged exhaust you can usually tell just by driving....but no I havent visually looked in the y-pipe.

I would honestly check...seems like you have eliminated most of the other things!
Old 12-30-2006, 09:10 AM
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Question

Had same problem w/ a turbo Puick, v-sicks.... Lazy, low on pwr.
Chased all I could think of, except for the air cleaner.
Depending on the size, it could be a serious restriction. I built a dual cleaner/plenum system.. Picked ALOT of rpm, and HP.
What size is the cleaner?
Has the engine been run with it off?
Old 12-30-2006, 09:48 AM
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why are you running such a cold plug? if the afrs can run leaner and more timing, i'd think a stock plug would be cold enuff...maybe one step colder but nothing along the lines of a "tr-8"
Old 12-30-2006, 09:53 AM
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Originally Posted by cablebandit
why are you running such a cold plug? if the afrs can run leaner and more timing, i'd think a stock plug would be cold enuff...maybe one step colder but nothing along the lines of a "tr-8"
What plug is he running? A Tr55 should be fine for that kind of power
I would think. Well, the power that his mods should make.
I'm only running a TR6 and my car sees 19psi daily.

What % duty cycle are the stock injectors at?
Old 12-30-2006, 03:31 PM
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I havent check the DC of the injectors...I imagnie they are maxed out or at least 80%. I'm runnng a TR6 plug because I'm running 11.4 compression. As far as intake, just a holley air filter, slp lid, bellow, stock MAF, stock TB smoothed out, stock LS6 intake.
Old 12-30-2006, 03:32 PM
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Originally Posted by cablebandit
why are you running such a cold plug? if the afrs can run leaner and more timing, i'd think a stock plug would be cold enuff...maybe one step colder but nothing along the lines of a "tr-8"
Where did TR8 come from??? I'm running the TR6's.
Old 12-30-2006, 03:39 PM
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Originally Posted by Patrick G
To me, it looks like your throttle body is not opening up all the way. Basically, you start showing the gains down low, then they go away. I know it sounds too easy to miss, but I've seen Stock Eliminator guys miss this before. Check the throttle cable and have someone step on the throttle and see if you're getting 100% throttle opening.
Had this happen on my girlfriends car one time....the cable was hooked to the wrong spot on the NW TB, lol made about a 25 rwhp diff.
Old 12-30-2006, 04:42 PM
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Question What are the..

Originally Posted by joshp14
I havent check the DC of the injectors...I imagnie they are maxed out or at least 80%. I'm runnng a TR6 plug because I'm running 11.4 compression. As far as intake, just a holley air filter, slp lid, bellow, stock MAF, stock TB smoothed out, stock LS6 intake.
dimensions of the filter?
L x W x H ???
It's fairly easy to calculate the air requirements, and the capacity of the filter, to determine if it's a problem..
Old 12-30-2006, 04:45 PM
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Air filter is whatever the stock ls1 filter is.... 16" x 8" x 1.5"
Old 01-01-2007, 03:27 PM
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i dunno WHERE i got tr8 from...sorry...carry on
Old 01-01-2007, 11:27 PM
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hmmm, perplexing in the least


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