Tunning a GT with 4v Motor

[fastball19]

Ok many of you already know what i have been up to, i took the 2v out of the car and replacing it with a 4v mach1 motor. I'm keeping the factory computer in the car. How hard will it be to tune the computer for the new motor. What needs to be done. I want to get a idea i what will be going on with the car. The car is automatic.

these will be the mods
-LT Headers
-Shorty X
-373 Gears
-Catback
-The current chip i have is a Diablo Revolution
- i have a nos system but i will be adding that later not with the motor tunning

 

[Yellow4.6]

I just did this swap myself.......03 Mach motor into a 98GT, I assume you reused you stock harness & cpu.........All you really need to do is to flash a stock Mach 1 tune into yours and tweak it from there.

So i'd send you chip to a tuner.....(i recommend Modular Depot in Cincy, tuned mine...or Modular Powerhouse in Georgia) and they can flash it for you and help set ya up from there.

Did your motor come out of an auto car or stick?.....Post up some Dyno #'s when you get it done.


GoodLuck

 

[ponygt65]

I just did this swap myself.......03 Mach motor into a 98GT, I assume you reused you stock harness & cpu.........All you really need to do is to flash a stock Mach 1 tune into yours and tweak it from there.

So i'd send you chip to a tuner.....(i recommend Modular Depot in Cincy, tuned mine...or Modular Powerhouse in Georgia) and they can flash it for you and help set ya up from there.

Did your motor come out of an auto car or stick?.....Post up some Dyno #'s when you get it done.


GoodLuck

:beer:

 

[fastball19]

Is the Tune Difficult? Time Consuming to flash tune the Stock Mach 1 Tune into the GT’s Stock Computer

 

[fastball19]

Should i just get a Stock Mach1 ECU?

 

[VirtualSVT]

Did you PM Slow on FS? He'll know if the Gt computer can run the mach Motor.

I don't see why not but still.

 

[Yellow4.6]

Should i just get a Stock Mach1 ECU?

The stock GT ECU will run the Mach Motor w/ the GT Harness. You Do not need the Mach computer......If your close to a tuner then I'd just take it there and have them dyno tune it.

I took mine to Modular Depot to have the dynotune done, and Ken B just more or less flashed a Mach tune into my ECU and tweaked it from there.

If you want to run the Mach 1 Harness (which is not needed) you'll have to run the Mach ECU.

If you wanna go the Mach ECU route.....I bought one outta an 03 Mach 5-spd.....that i ended up not using, that'll i'll sell ya for what i bought it for.

But the easiest and most cost effective way is the GT ECU/harness.

 

[blk04cobra1]

Like Yellow 4.6 has said...there will be no difficulties tuning with the GT harness...

 

[Yellow4.6]

Is the Tune Difficult? Time Consuming to flash tune the Stock Mach 1 Tune into the GT’s Stock Computer

No more difficult than any other tune.

 

[fastball19]

The stock GT ECU will run the Mach Motor w/ the GT Harness. You Do not need the Mach computer......If your close to a tuner then I'd just take it there and have them dyno tune it.

I took mine to Modular Depot to have the dynotune done, and Ken B just more or less flashed a Mach tune into my ECU and tweaked it from there.

If you want to run the Mach 1 Harness (which is not needed) you'll have to run the Mach ECU.

If you wanna go the Mach ECU route.....I bought one outta an 03 Mach 5-spd.....that i ended up not using, that'll i'll sell ya for what i bought it for.

But the easiest and most cost effective way is the GT ECU/harness.

How much for the Ecu ?

 

[Yellow4.6]

How much for the Ecu ?

PM'd ya

 

[fastball19]

PM'd ya

let me think about it!

 

[fastball19]

So what would be better: Running the GT Ecu or running the Mach1 ecu?

 

[Yellow4.6]

So what would be better: Running the GT Ecu or running the Mach1 ecu?

You can do either.........After you tune it, it dosen't make much difference.

 

[fastball19]

How much should something like that run ? For the Flash and the tune for the car on a chip ( non Dyno )

 

[Yellow4.6]

To Flash a chip and then tweak it from there i'd say around $150+. Not real sure though. I'd advise you to call acouple places and see what their charge is. Since you have a Diablo chip I'd start w/ those who handle that product. I know MD in Cincy handles both Diablo and SCT.

 

[fastball19]

just going with my computer