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

Which one first?? Heads, EBL Flash, Gear ratio

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Old Dec 30, 2011 | 12:42 AM
  #1  
ericamaro89's Avatar
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From: Texas
Car: 1989 Camaro RS
Engine: LO3 305 TBI
Transmission: 700-R4
Which one first?? Heads, EBL Flash, Gear ratio

For a 1989 Camaro RS with 305 TBI only upgrades are short headers and flowmaster.
So I was really wanting to get a new cam, after listening to other people saying I should leave cam till last. (I don't if thats good)
Now that I have some money saved up which should I do first?
Port stock 305 Heads?
Order and install EBL flash? OR..
Change my gear ratio to 3.73?

Comments and recommendations highly appreciated.
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Old Dec 30, 2011 | 09:20 AM
  #2  
RBob's Avatar
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: Which one first?? Heads, EBL Flash, Gear ratio

Originally Posted by ericamaro89
For a 1989 Camaro RS with 305 TBI only upgrades are short headers and flowmaster.
So I was really wanting to get a new cam, after listening to other people saying I should leave cam till last. (I don't if thats good)
Now that I have some money saved up which should I do first?
Port stock 305 Heads?
Order and install EBL flash? OR..
Change my gear ratio to 3.73?

Comments and recommendations highly appreciated.
I wouldn't go with 3.73 gears unless the engine can rev more. Going with 3.23 or 3.42 gears would be better. The V6 cars used those ratios, so easy to get. And get the speedometer gears too (from tranny).

If the heads are off I'd do a cam at the same time. No sense tearing it down twice.

Will also need a better fuel pump once the heads/cam are done. Along with increased fuel pressure or larger injectors to support the additional HP.

Once the heads/cam are done tuning is going to be required. So maybe a good order is:

gears
fuel pump (TPI or a 190 LPH)
EBL Flash
injectors or adjustable FPR
heads & cam

RBob.
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Old Jan 1, 2012 | 12:40 AM
  #3  
L98wit's Avatar
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From: CT
Car: 91 rs
Engine: 350 tbi with EBL
Transmission: t56!
Axle/Gears: 2.733
Re: Which one first?? Heads, EBL Flash, Gear ratio

i would first buy the ebl flash which was what i did wen i had a 305 (even with stock muffler it sounded louder and ran better after a few tuning runs) i then bought an exhaust so my order was 1.ebl 2.exhaust 3.350 swap but do the ebl swap first its one of those upgrades thats better to do early (wen u got the money) then later wen ur car has new parts but runs like crap because it doesn't have a decent tune
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Old Jan 5, 2012 | 07:55 AM
  #4  
305sbc's Avatar
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From: Fairview Heights Illinois
Car: 1986 Irocz
Engine: 305 TPI
Transmission: 700R4
Axle/Gears: 3.25:1
Re: Which one first?? Heads, EBL Flash, Gear ratio

Getting very familiar with your tuning equipment and software is always a good idea before you start changing things around with mods.
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