V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

Performance Parts ?

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Old Sep 21, 2000 | 10:05 PM
  #1  
Vortex_89rs's Avatar
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From: Lee's Summit, MO
Performance Parts ?

Okay. I have heard people talking about getting fuel injectors that put out more fuel. This is all good, but I talked to my Power Mechanics teacher about this. If you increase the amount of fuel going into the chamber (from bigger injectors), wouldn't you need to increase the amount of air going into the chamber (via forced induction ie supercharger or turbo)? Otherwise your ratio would be off, and your car would run weird. Now, I don't know if the ECM controls how long the injectors are open or whatever, so the theory seems sound. More fuel means you need more air. Am I just missing something?
Vman

------------------
1989 Camaro RS
2.8 V6
K&N's
700R4 tranny
Cragar Street Pro rims (old Series 30)
Pioneer DEH-P3000
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Old Sep 22, 2000 | 01:00 PM
  #2  
TomP's Avatar
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Joined: Mar 2000
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From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
Yep, your man's right. That's why injectors are usually done after many other mods. The idea is that after the mods, the motor has more than enough air, but is getting choked by the stock injectors.

The ECM does control the injectors.. so if you put on high-flow ones, you wouldn't affect the car that much. Of course, the "extra" wouldn't get used, and you'd be wasting $$.

I thought I remembered reading once that our v6 injectors were the same as v8 injectors- but that might not be true. We could possibly go to v8 injectors from a junkyard instead of paying high $$ for new ones.

Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
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Old Sep 22, 2000 | 01:01 PM
  #3  
82-T/A's Avatar
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Joined: Jul 1999
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From: Davie
No, your totally right. Before you go get new injectors.. you should do other things first. For the injectors to benefit you, you will need more air flow. This can be accomplished by a writeup that I did in a message thats down below titled..

PORTING AND POLISHING RESULTS!!!!!

On this same forum.

You can also bore the throttle body to 57mm too.

A camshaft will increase flow too.

Todd
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