94 mark 8 tuning question

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Rich00033

New member
Ok I'm am just wanting to know if I change the exhaust and the gears to 4.10 and do jmod will it run funny till I tune it ?
 
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CARiD

New member
Exhaust will definitely make it sound well, and will improve the power a little (as it improves the exhaust gas flow).
Performance air intake will let the engine breath easier which will give you a slightly better result in combination with a nice exhaust system.

These cars have very comfortable suspension which is not really good for a performance orientated vehicle. So if you decide to go further you would need to think about sport suspension setup to avoid nose dive on braking and acceleration.
 
driller

driller

El Presidente
If you're not ready to tune it, I would wait on the gears.

General rule of thumb is you can step one, maybe 2 gear steps without a tune. The speedo gear can be changed easy enough to correct the speedo. Even so, 4.10s will need a tune to be effective.

I highly recommend a J-mod and transmission cooler. You can do well with a dual 2-1/2" exhaust with an x-pipe and open type mufflers. With the cats still in place it would not be too loud.
 
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Rich00033

New member
Or do you mean 3.29 or 3.30 gears and I wouldn't have to tune right away cause the main reason I'm asking is cause the cheapest person I can find to tune it is almost 900 dollars for the first tune and every additional tune is 250 dollars a piece
 
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Rich00033

New member
I'm sure I can't pur a 96 obd2 computer in my 94 witch would be a lot easier to tune cause you can get a sct x4 power flash tuner for 96 and up but not for 94
 
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chris2523

New member
Rich00033 said:
Or do you mean 3.29 or 3.30 gears and I wouldn't have to tune right away cause the main reason I'm asking is cause the cheapest person I can find to tune it is almost 900 dollars for the first tune and every additional tune is 250 dollars a piece
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that is way too expensive.
it should be around 400 or so. and many tuners will do lifetime adjustments.

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Rich00033 said:
I'm sure I can't pur a 96 obd2 computer in my 94 witch would be a lot easier to tune cause you can get a sct x4 power flash tuner for 96 and up but not for 94
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much easier to just purchase a 96 model than to swap everything over.
 
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Rich00033

New member
And that's what I thought to but I live in Chattanooga tn and the closest I have found is moes speed shop in Dallas ga

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If anyone knows someone that can do it somewhere around me please let me know
 
driller

driller

El Presidente
Rich00033 said:
Ok cool now if I went with 3.73 gears I probably wouldn't have to tune it right away then would i
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3.73s would be 3 steps.

Rich00033 said:
... the main reason I'm asking is cause the cheapest person I can find to tune it is almost 900 dollars for the first tune and every additional tune is 250 dollars a piece
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Does that include the cost of the chip and dyno time for the 1st tune?

Rich00033 said:
I mean that alone almost has made me want to say the hell the lincoln and swap the motor to a mustang
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Mustangs also require tunes.

Rich00033 said:
I'm sure I can't pur a 96 obd2 computer in my 94 witch would be a lot easier to tune cause you can get a sct x4 power flash tuner for 96 and up but not for 94
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Simple bolt-ons do not require OBD2 capability.

Rich00033 said:
If anyone knows someone that can do it somewhere around me please let me know
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If you didn't notice, we have vendors here. They can supply you with a tune on a chip. It won't be a generic tune but specific to the Mark VIII and accommodating your modifications and requests.
 
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OU812IC

New member
For what it is worth I went from 3.27 to 4.10 on my 98 and it shifts in time with no issue. I do not have a jmod. Again mine is a 98 and has slightly different internals compared to earlier models from what I have read. Hope this helps..
 
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Rich00033

New member
Ok I got my spring conversion kit out on the other day and I drove it from where I had it parked to the house about 30 miles total and I get almost to the house and the trans started slipping a lil bit it is the first time it has been drove in 2 years and the tranny fluid looks good but it does have kinda jelly looking stuff in it.... I think the trans filter is stopped up and that was causing it to slip a lil bit it only slipped for a few seconds and I parked it and before I move it anymore I'm going to change the tranny fluid... Does anyone think I fried the tranny???

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I got the spring conversion kit put*** on not out on
 
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Rich00033

New member
And I know that the mustang would have to be tuned to but it's a lot easier to find someone to tune them and it's easier to find parts for to that's y I'm thinking about going that route

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Cause it's kinda hard to find someone to tune a 94 mark 8 lol
 
tonybrooklyn

tonybrooklyn

New member
OU812IC said:
For what it is worth I went from 3.27 to 4.10 on my 98 and it shifts in time with no issue. I do not have a jmod. Again mine is a 98 and has slightly different internals compared to earlier models from what I have read. Hope this helps..
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I have a 1997 Mark VIII and have also gone from 3.27 to 3.73 with no issues whats so ever.
But you wanna know something do yourself a favor and J-Mod it when you can.
The difference is night and day.
Your gonna fall in love with your car all over again.
Can't believe i waited so long to do mine.
 
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