TBI Throttle Body Injection discussion and questions. L03/CFI tech and other performance enhancements.

305 to 350 throtle body

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Old Nov 26, 2007 | 12:21 AM
  #1  
j_camaro_67's Avatar
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From: sask canada
Car: dark hunter red 84 camaro
Engine: 414 stroker
Transmission: th350
Axle/Gears: 3:70
305 to 350 throtle body

k i now this isn't about 3rd gens but need some help with coming up witha combo for my 1990 gmc half ton. right now its a stock 305 efi i wont to put a 350 in it that isn't just a stock 350 and wont to do it farly cheap, i'm gettting it bored to a 355, and wonted to use vortec heads off a 97 and up truck. but not sure on casting numbers to look for, and if i do use vortec heads what intake do i wont to use as well as throtel body and what about computor. as well as what cam choice should i go for i'm looking at makeing it a sleeper.
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Old Nov 26, 2007 | 05:01 PM
  #2  
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From: Sioux Falls, SD
Car: 85 Firebird
Engine: SBC 383/88BW
Transmission: Built 700R4
Axle/Gears: Moser 9in/3.55
Re: 305 to 350 throtle body

I'm working on the same deal withmy gmc, I don't think i'll go vortec, but I would suggest using this intake if your sticking with a TBI (I will be) ...oh make sure you chip it afterwards.... www.tbichips.com

http://store.summitracing.com/partde...5&autoview=sku

I would strongly advise you to use the holley TBI since it flows 670cfm:
http://store.summitracing.com/partde...5&autoview=sku

You can find those cheaper somewhere on the web... good luck
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Old Nov 26, 2007 | 08:18 PM
  #3  
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
This is more of a TBI question than Engine Swap. I'll let the mods there decide if it lives or dies.
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Old Nov 26, 2007 | 09:55 PM
  #4  
comp's Avatar
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From: So IN.
Re: 305 to 350 throtle body

lurkin for info
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Old Nov 27, 2007 | 09:08 PM
  #5  
BMmonteSS's Avatar
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From: Buckhannon, WV
Car: 84' Monte
Engine: 350
Transmission: 700-r4
Axle/Gears: ferd 9" posi 3.50 gears
Re: 305 to 350 throtle body

The TBI.com chip is junk, just like about any mail order tune. You'll need to learn to tune yourself if you want it run well and make power. The equipment only cost about $150, or be prepared to pay big bucks to have it dyno tuned.
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Old Nov 28, 2007 | 05:34 PM
  #6  
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From: Sioux Falls, SD
Car: 85 Firebird
Engine: SBC 383/88BW
Transmission: Built 700R4
Axle/Gears: Moser 9in/3.55
Re: 305 to 350 throtle body

I've heard a few good things about those. I would'nt order just any chip, and plus you can call and brian can chip things according to what mods you have (engine)

To tell ya the truth, I would rather chip my own tho, if you have time then do that...
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Old Nov 28, 2007 | 06:40 PM
  #7  
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From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: 305 to 350 throtle body

Originally Posted by TheBigJ
I've heard a few good things about those. I would'nt order just any chip, and plus you can call and brian can chip things according to what mods you have (engine)
What a bunch of bull.

Originally Posted by TheBigJ
To tell ya the truth, I would rather chip my own tho, if you have time then do that...
Now you are using your head
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Old Nov 28, 2007 | 07:52 PM
  #8  
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From: Buckhannon, WV
Car: 84' Monte
Engine: 350
Transmission: 700-r4
Axle/Gears: ferd 9" posi 3.50 gears
Re: 305 to 350 throtle body

It is IMPOSSIBLE to make a up a tune based on a mod list....just can't be done no matter how good you are.
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Old Nov 28, 2007 | 10:02 PM
  #9  
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From: Sioux Falls, SD
Car: 85 Firebird
Engine: SBC 383/88BW
Transmission: Built 700R4
Axle/Gears: Moser 9in/3.55
Re: 305 to 350 throtle body

But it does give you a starting point
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Old Nov 29, 2007 | 06:06 PM
  #10  
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From: Buckhannon, WV
Car: 84' Monte
Engine: 350
Transmission: 700-r4
Axle/Gears: ferd 9" posi 3.50 gears
Re: 305 to 350 throtle body

buy the equipment and I'll make you a starting point.....it only takes 5 minutes. He's charging big money for information that is given away here freely.
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Old Nov 29, 2007 | 06:27 PM
  #11  
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From: Sioux Falls, SD
Car: 85 Firebird
Engine: SBC 383/88BW
Transmission: Built 700R4
Axle/Gears: Moser 9in/3.55
Re: 305 to 350 throtle body

Originally Posted by BMmonteSS
buy the equipment and I'll make you a starting point.....it only takes 5 minutes. He's charging big money for information that is given away here freely.
thanks!
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