tpi runners.
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Junior Member
Joined: Dec 2009
Posts: 73
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From: TX
Car: 1990 FORMULA WS6 T-TOPS
Engine: 305 TPI
Transmission: BORG-WARNER T5
Axle/Gears: BORG-WARNER 3.42
tpi runners.
I have a 305 tpi and i want to get new runners. Which ones are the best . The SLP or Edelbrock. And if i get 22lbs fuel injectors would it make a difference?
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Joined: Sep 2003
Posts: 6,859
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
Re: tpi runners.
Depends. Out of the box Edelbrocks as long as they are machined correctly. 
For serious modification SLP.
For serious modification SLP. 
Junior Member
Joined: Jan 2010
Posts: 60
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From: Corpus Christi TX
Car: Corvette
Engine: 383
Transmission: 700r4
Axle/Gears: D36 w/ 3.08
Re: tpi runners.
What are the stock injectors?
Injectors can help if yours are worn and the newer bosch III have better spray pattern atomization than stock.
going to a bigger size needs a tune.
Injectors can help if yours are worn and the newer bosch III have better spray pattern atomization than stock.
going to a bigger size needs a tune.
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Joined: Jul 1999
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From: Bertram (outside Austin), TX
Car: 87 GTA
Engine: L98
Transmission: 700R4
Axle/Gears: Dana M78 3.27 posi
Re: tpi runners.
MAF will allow a little more leeway for mods than MAP will, before PROM tuning is needed.
Junior Member
Joined: Jan 2010
Posts: 60
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From: Corpus Christi TX
Car: Corvette
Engine: 383
Transmission: 700r4
Axle/Gears: D36 w/ 3.08
Re: tpi runners.
Maf will think its feeding with 19lbers when its really dumping more in with 22s
I ran PIG RICH when I didnt get a tune for bigger injectors. I balanced it out for a while with an AFR but still ran rich.
Got a tune and been happy since
I ran PIG RICH when I didnt get a tune for bigger injectors. I balanced it out for a while with an AFR but still ran rich.
Got a tune and been happy since
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