TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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stock l98 heads

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Old Feb 19, 2007 | 12:47 PM
  #1  
gscz28's Avatar
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From: Kalamazoo
Car: 89 iroc
Engine: 355 TPI FINALLY
Transmission: 700r4/ SHIFT KIT
Axle/Gears: 3.42
stock l98 heads

I'm looking at having these rebuilt and would like to know.
In order to create a little more lift, how do you know what springs to go with?
Maybe something around the .520 range would be nice.

thanks
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Old Feb 21, 2007 | 11:46 PM
  #2  
89Nighthawk's Avatar
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From: Texas
Car: 89 GTA Nighthawk
Engine: 389 CID Vortec TPI
Transmission: TCI 700R4 w/Vigilante
Get the recommended springs from the cam manufacturer.
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