OBDII upgrade ?

ggfrank21

ggfrank21

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Would there be any benefit to changing my 94 mark to the 96 and up OBDII system and if so what would it be and what would it take to do the job is it a completely new harness?
 
Lonnie did it, and from what he said it was indeed a nightmare.

with enough money, time and patience it could be done.
 
I think you would have a hard time finding some parts that were made only for the 96 model year. Things like IMRC controllers and the VCRM come to mind.

I like the OBDI better because I don't have to have a scanner to read my error codes.

The only advantage I could see would maybe be for tuning purposes, but I think there are some better systems for tuning OBDI cars now?
 
Tuning options for obd1 and obd2 are basicly the same...
but "datalogging" options for odb1 basicly dont exist.

If I knew in 1999 what I know now, I wouldn't have bought a 95 Mark 8, I would have held out and gotten a 96 LSC (odb2 w/HIDS)
 
Yes I did it on my 95 and for customer’s 94. It’s a lot of work, very involved and not something you want to tackle on a weekend or two or three. The IMRCs are the same in 96 as any other Gen 1. They just use different actuators with sensors in them to tell if each bank is open or shut. You don’t have to swap them out if you don’t want to.

The advantages in tuning are not the same. The OBD I has limited parameters that are accessed for tuning. Where as the OBD II has a lot more for much better control over the entire drive train. Just switching over with the new programming I gained 20 more hp over the max I got with the OBD I. And I had a more restrictive exhaust in place, no UDs, no MSD and no CAI as I did with the OBD I.
 
Dumb Question........if the ODBII is so much better than the ODBI, how come my 1998 LSC can't be tuned to run faster than my 1993 Mark VIII?

My 1993 ran 14.6 stock and 14.3 with just an exhaust.......and no tune or chip. As far as I know there are no Gen II's running these kind of times stock or with just an exhaust?

My new 1998 LSC is slower......at least by seat of the pants. (I'll get it to a track when they open in NJ.

I'm thinking of putting an exhaust and a tune on my 98 LSC. Would take even get my close to 14.5?

Ken
 
Intake - the Gen II has an inferior intake system. Put a Cobra intake on that baby and you will be happier. On top of that I read that some 93s, the early ones, has some pretty aggressive tuning from factory.
 
unity said:
On top of that I read that some 93s, the early ones, has some pretty aggressive tuning from factory.
Click to expand...

This is the part I've never really gotten about this topic. So I can't program the computer on my 1998 LSC with the
"more programable ODB II" to the levels of the aggressive factory tuning on my OBD I computer on my 1993??

Maybe if I put the intake and the ODB I computer from my 1993 on my 98 LSC it will run faster? :)

Ken
 
Yes you can, but the the intake is still the Achilles heel. But yes, your tunes 98 should do better than a stock 93. But if you are looking for better performance yet, consider and intake swap and exhaust work.
 
I will approach it in this way, anything can be done with enough time and money.
If you go about swapping manifolds plan for a complete chip and retune from a shop that knows their stuff (ie Lonnie). If you are a new customer you should fully discuss what your expectations are, and if they can be met, and what will be charged for what services performed.
 
unity said:
Yes you can, but the the intake is still the Achilles heel. But yes, your tunes 98 should do better than a stock 93. But if you are looking for better performance yet, consider and intake swap and exhaust work.
Click to expand...
........As far as I know there are no Gen II's with just a tune running 14.6?

The goal with my 98 car was to try and make it as fast as my 1993, which got down to 14.3.......without doing a gear swap.

I'm thinking exhaust, a tune and MAF. But is that enough on a Gen II? A cobra intake swap is a big (time & money) job isn't it?

Thanks,
Ken
 
Ditto .... these cars get air fine, its the exhaust end that needs the work. Swapping a Cobra intake to improve is not too expensive at all, $400 to $700 max. Then for $50 put on some 03/04 Cobra manifolds, slap that exhaust on and you are setup to get the most out of a tune.
 
Like it's already been mentioned the intake on your 98 is most of your problem. It works ok in a SC application but NA it isn't worth it. I've thrown a lot of them away. Also in 96 they changed the exhaust manifolds. Those are more restrictive than the earlier ones. Exhaust needs some work. I like the Cobra intake myself and why I push them when people bring me their vehicles. You have to have a program for them to get the most out of them though.

Stock vs stock the Gen 1 will be faster. You can't just toss in the same agressive calibrations from a Gen 1 into a Gen 2 either. Totally different calibrations. Also the Gen 1 intake allows for more agressive calibrations.
 
Has anyone tried putting a gen 1 intake on a gen 2?

If the gen 1 intake is better, I would think this would be a cheap upgrade? At least cheaper than the cobra intake and a lot more are available.

I think they look better too.:D
 
The quickest N/A Gen2...

#7 - sleeper/Dave Hogan/97 Mark VIII/13.931 @ 98.653

If I recall it had a Cobra intake.

The next two quickest N/A Gen2s...

#12 - JC/Jack Carter/97 Mark VIII/14.077 @ 97.19
# 13 - mlschultz/Mike Schultz/98 Mark VIII LSC/14.132 @ 96.79

... both who have since gone supercharged.

The quickest N/A Gen1...

#1 - Lonnie/Lonnie Doll/95 Mark VIII/13.323 @ 102.49

... ironically, a Gen1 converted to OBDII. :p
 
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