Hello,my first post 79 firebird

Hello I have a 79 firebird with a 383 stroker

I need help converting over to TBI..
I have. A few questions...
my specks.
383 Stroker scat assy.
Howards cam 110051-10
procomp alum. heads 210cc runners 64cc chambers
12cc dish Pistons.
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parts I have

5.7 Tbi.
Wire harness 95 4x4 suburban
95 Ecu suburban with 4l60e trans prom
4l60e trans
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how large can I bore out the tbi? 46mm?
What inline fuel pump should I get on a budget?

Thanks in advance

Like most things, you can spend as much as you want to. Most people building high levels of power run a 454 throttle body does to it's larger flow capacity. It is my opinion that an In-tank fuel pump would be superior, I believe that models similar to the Airtex E2000 are popular for this. There is also a modification that was done on another thread with a modified fuel pump module to overcome the fact that your factory pump probably doesn't have any baffles.

Thanks I am considering that. I got the 5.7 tbi because I read that the 454 tbi had idle issues

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Originally Posted by Greased-lightning

Thanks I am considering that. I got the 5.7 tbi because I read that the 454 tbi had idle issues

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I have a 454 Throttle Body on my 93 K1500 / 5.7 liter / 4L60E, which has a very similar harness and ECU you have posted. I custom tuned (programmed) my own chip, so no, I don't have idle issues! Best I can figure, there could be some WRONG information about 454 Throttle Bodies? Heck, the money I saved using a 454 Throttle Body vs. the cost of a custom bored 350 throttle was HUGE!

I would recommend using a frame mounted fuel pump the 1985-1989 Ford F150 Electric Fuel Pump ... sometimes called the E2000 (Airtex part number) fuel pump.

dave w

Excellent thanks I'll get rid of the one I have and get a 454

i contacted tbi chips and was told that my setup was to powerful for a tbi to stay carbed.
What is the tuning limits of a 454 tbi?
Here are my specs if anyone can give me some advice thanks

383 stroker
howards cam 110051-10
duration 289/297 lift .488/507 op range 2800-6800
procomp alum heads 210 cc runners 64cc chambers
edelbrock air gap intake

Quote:

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Originally Posted by Greased-lightning

i contacted tbi chips and was told that my setup was to powerful for a tbi to stay carbed.
What is the tuning limits of a 454 tbi?
Here are my specs if anyone can give me some advice thanks

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Maybe this time TBI Chips could be correct? Maybe not?

It's not going to be quick or easy to get TBI working correctly / tuned on an engine with your build specs. Most likely myself and other members would disagree with TBI Chips.

In my humble opinion, it really depends on "How Much YOU Want to LEARN TBI"?

dave w

If it's possable I'm willing to learn, I just need some guidance up front so I don't ruin my engine or spend money unnecessarily. Any advice would be greatly apreciated

Quote:

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Originally Posted by Greased-lightning

If it's possable I'm willing to learn, I just need some guidance up front so I don't ruin my engine or spend money unnecessarily. Any advice would be greatly apreciated

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I think learning to data log with TunerPro RT is a very good place to start learning!:thumbsup:

Attached are screen shots showing a summary of some TunerPro RT data logs I combined, using a TBI computer identical to the one you posted you plan on using. I use Microsoft Excel to "crunch" a data log. I don't know what TBI Chips uses to "crunch" a data log, maybe DataMaster TTS (http://www.ttspowersystems.com/index.html)?

Engines need three things to run, Fuel / Air / Spark. The data log is "crunched" to determine rich / lean, spark advance / knock, and Idle Air Control (IAC) / RPM.

dave w

Thank you for taking to time to send me this, I was just on the tuner pro site reading.