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HELP! Low dyno numbers...kinda.

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Old Aug 7, 2006 | 06:36 AM
  #1  
70Stang's Avatar
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Default HELP! Low dyno numbers...kinda.

Car has always dyno'd and ran well on the spray. Stock it made 416/466 on a 125 shot.

Now, it has -

233/239 .598 .603 113 cam
LTs, X, Dumped
LS6
Lid
NX 150 single nozzle

TCI 3000 Convertor
Stock 10bolt


The car makes 375 on motor, which I am very pleased with but only makes 460 on the 150shot...

Some issues -

The car will always try to downshift in 3rd...so the nitrous and motor runs were done in 2nd gear.

The nozzle is in the typical LS! spot, but I think it may be a little looser in there then I want.

Stall = low numbers?


What should I look for? The solenoids are brand new from NX (carbon) and all the lines have been checked for debris. I need to run thru it and check voltage at WOT...that may be the issue, but I wanted to see what you guys thought.
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Old Aug 7, 2006 | 02:08 PM
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From: Sierra Vista, AZ
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Yes stall can effect the dyno #'s but still run the track #'s. Cant get a good reading in 2d either, use software to lock it into 3rd gear, or start the pull higher on the rpm, like 3500 or 4000.
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Old Aug 7, 2006 | 02:13 PM
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The pull needs to be in 3rd gear 1.1 ratio 2nd gear will result in less HP, If the trans keeps down shifting say above 70mph then you need to fix the tune
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Old Aug 7, 2006 | 02:51 PM
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With the bottle you're blowing through your stall.
The converter is slipping more which costs you in dyno numbers.
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Old Aug 7, 2006 | 05:24 PM
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From: strongsville ohio
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stalls are tricky to get good dyno #"s with
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