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Low, almost no backpressure

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Old Jul 10, 2009 | 10:38 PM
  #31  
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HELLOOOOO....HELLOOOO......
The only mods he has that is worth a damn are headers and a tune and he's goin mid 14's in tx heat.I honestly dont see the problem here...
Put a convertor in the truck IMO..


What headers are on the truck?
Does it have a posi rearend?
have you run it with slicks?

Last edited by andrew383; Jul 11, 2009 at 06:57 AM.
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Old Jul 10, 2009 | 11:51 PM
  #32  
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Originally Posted by andrew383
HELLOOOOO....HELLOOOO......
The only mods he has that is worth a damn are headers and a tune and he's goin mid 14's in tx heat.I honestly dont see the problem here...
Put a convertor in the truck IMO..


What headers are on the truck?
Does it have a posi rearend?
have you run it with slicks?
Agreed. Just giving him some opinions on optimizing his exhaust for his particular setup. That is all.

True, look at a converter, and a cam that would take advantage of all the breathing room he has created up top! OR F.I. !!!
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Old Jul 11, 2009 | 06:56 AM
  #33  
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well he hasnt said what size headers they are.If he lost "alot" then he may be runnin around with 1 7/8 primaries ya know..
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Old Jul 11, 2009 | 10:52 AM
  #34  
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I'm running the pacesetter headers I believe they're 1 3/4 primaries. It does not have the G-80, and no I haven't ran it with slicks, there's no need to the truck doesn't have enought torque off the line to brake the tires loose. I'm running some hankook ventus on my stock 17's they're 275/60R17
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Old Jul 11, 2009 | 12:10 PM
  #35  
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F-back pressure. nothing good will come from ADDING backpressure. gears, converter, cam will all solve your issues....

Last edited by Wilde Racing; Jul 11, 2009 at 12:26 PM.
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Old Jul 11, 2009 | 12:20 PM
  #36  
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put a potatoe in one of the tailpipes
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Old Jul 11, 2009 | 01:05 PM
  #37  
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I say just increase the airflow to match the exhaust you have

On a side note my truck ran a 14.1 @ 96 with CAI, 1 3/4 x 3 longtubes, ORY w/ 4" straight through exhaust and a mail order tune. Full weight plus some extra. Way oversized for my setup and still had traction problems. I'm not convinced that too little backpressure hurts you much.
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Old Jul 12, 2009 | 01:23 AM
  #38  
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who cares about backpressure. it's all about the exhaust gas velocity and where you want your power curve. you can make up for a lack of low-end with a bigger converter or deeper gears. it's whatever pulls your trigger.
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Old Jul 12, 2009 | 08:40 AM
  #39  
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full bolt ons/exh and cam WITHOUT a stall (bad idea) i was running 14.2s. 3600 stall and a better tune, ended up running a 13.2 and theres still room to get it down. That stall will make all of the difference.

Theres a guy on here running his 4.8 w/o a cam and has bolt ons/exh and is running 14.0s in this hot assed weather. But to run that 14.0 he has a torque converter, once he does the cam hes expecting another 3-4 tenths knocked off and in cooler weather he can expect to see even better.

If you're trying to compare 60ft runs and are on street tires you might as well just forget it, lol. If you add power and want the 60fts to go down it wont happen unless you can hook.
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Old Jul 13, 2009 | 03:49 PM
  #40  
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thanx for all the replies guys. I think I will leave it the way it is and slap on a 3200 precision industries converter with some 4:10 gears...
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