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Have 730 ECM, SD harness and ...TBI intake setup

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Old Sep 20, 2003 | 05:07 PM
  #1  
8Mike9's Avatar
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From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Have 730 ECM, SD harness and ...TBI intake setup

Seems to me it should work, huh?

My thoughts are that TBI injectors are about 2ohms each, in parallel should be about 1ohm ..16 TPI injectors at 16-18ohms each, come out about the same.

Reason I want to run it this way is I stumbled across a complete TBI setup, minus harness and ECM (which I already have the above mentioned SD stuff).

Starting from a stock tune in the prom, do I have a chance?

Motor is basically stock (non-thirdgen) to be tweaked as needed/upgraded.

Thanks.
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Old Sep 21, 2003 | 04:50 AM
  #2  
Z69's Avatar
Z69
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From: Texas
If it doesn't work out or if your just interested. I'll buy your 730 & harness or swap you for a 746 & harness if I can find one.
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Old Sep 21, 2003 | 10:26 AM
  #3  
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From: In reality
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Re: Have 730 ECM, SD harness and ...TBI intake setup

Originally posted by 8Mike9

My thoughts are that TBI injectors are about 2ohms each, in parallel should be about 1ohm ..16 TPI injectors at 16-18ohms each, come out about the same.

Reason I want to run it this way is I stumbled across a complete TBI setup, minus harness and ECM (which I already have the above mentioned SD stuff).

Starting from a stock tune in the prom, do I have a chance?
There was an application where the 730 was used in TBI, but it only drove One injector.

The 749 ecm however has 2 injector drivers and is compatible with the dual TBI.

I have run a TBI with a 749, and it did work, but ran out of time for fully tuning it.

Be advised thou, that most any calibration you begin with for a 749 is for a TPI, which is a dry manifold, vs TBI which is wet, so you'll probably have to make some drastic AE changes.
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Old Sep 21, 2003 | 10:51 AM
  #4  
8Mike9's Avatar
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From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
Thanks for the info...I didn't think about the wet and dry aspect of it.
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Old Sep 21, 2003 | 10:53 AM
  #5  
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
730..TBI

A 730 will not run a TBI ...I tried and could not make it work.
Just to save you a little time and trouble.
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Old Sep 21, 2003 | 12:17 PM
  #6  
8Mike9's Avatar
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From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
That's good info...I was trying to use up some stuff I've collected.

I guess ths old beast will just have to go with 8 injectors instead of two.
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Old Sep 21, 2003 | 06:31 PM
  #7  
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: 730..TBI

Originally posted by Dyno Don
A 730 will not run a TBI ...I tried and could not make it work.
Just to save you a little time and trouble.
GM made it work. Correction, GM used the '730 to run TBI factory vehicles.

RBob.
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Old Sep 25, 2003 | 06:08 PM
  #8  
8Mike9's Avatar
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Joined: Jul 1999
Posts: 5,183
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From: Oakdale, Ca
Car: 89 IrocZ
Engine: L98-ish
Transmission: 700R4
RBob,

Do you have any info on this?
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