LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Back in an F-Body!

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Old Oct 30, 2012 | 07:48 PM
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Default Back in an F-Body!

I finally got another F-Body... I had a 2001 s10 and traded even for a 93 z28 M6. I had a 94 before this one so if anyone has any info on the 93's let me know! It has 3.23's glove box code is a gu5.. Has an SS spoiler, a flowmaster, Moroso Cold air intake and a hurst. Looking for some 10 spoke SS wheels now!
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Old Oct 30, 2012 | 09:10 PM
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Congrats! #150shot
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Old Oct 31, 2012 | 05:47 AM
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I believe there is a set of SS 10 spokes in the classifieds...
Ls1 lid
Longtubes
TIRE!!!!!!!
150 shot
TUNE-TUNE-TUNE-TUNE
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Old Oct 31, 2012 | 10:44 AM
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Originally Posted by 96lt1m6
I believe there is a set of SS 10 spokes in the classifieds...
Ls1 lid
Longtubes
TIRE!!!!!!!
150 shot
TUNE-TUNE-TUNE-TUNE
So you can put an LS1 lid on it without changing the hood or anything? The hood will clear it? Also I'm planning on putting 4.10's in it soon..
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Old Oct 31, 2012 | 11:03 AM
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4.10's
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Old Oct 31, 2012 | 12:47 PM
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Just my opinion but do 3.73s with your car. You have the M29 T-56 with the different gear ratios than the '94+ T-56. That's what I had in mine when I had the original trans. 3.73s in an M29 are similar to 4.10s in an MN6 (94+). 1st gear would be almost worthless with 4.10s.

Btw have fun with the '93. They really are a different animal
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Old Oct 31, 2012 | 08:46 PM
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Originally Posted by 93M6Formula
Just my opinion but do 3.73s with your car. You have the M29 T-56 with the different gear ratios than the '94+ T-56. That's what I had in mine when I had the original trans. 3.73s in an M29 are similar to 4.10s in an MN6 (94+). 1st gear would be almost worthless with 4.10s.

Btw have fun with the '93. They really are a different animal
Thanks man.. So.. What do you mean a different kinda animal? Good or bad way? Lol. Do tell...
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Old Nov 1, 2012 | 08:58 AM
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Originally Posted by 94 z28 A4
Thanks man.. So.. What do you mean a different kinda animal? Good or bad way? Lol. Do tell...
Kind of a pros and cons type deal. I could honestly go on all day about it.

They aren't necessarily bad cars at all, it's just that being a first year car, it has a few oddities that are specific only to 1993. Here's a small list of what a '93 is about.

-It is speed density and doesn't use a MAF sensor.
-Spline Drive non-vented Opti used from '92 to early '94.
-'93 only intake manifold that doesn't have a notch for a crossover tube on the fuel rail. Fuel rail is different also and the location where the fuel lines connect is in the middle of the rail unlike the rear on a '94+ fuel rail.
-Slightly larger cam (And I do mean slightly) The cars are supposedly faster...
-Oil pressure sensor located on the side of the motor by the oil filter as opposed to behind the intake on a '94+.
-AIR pump is frame mounted while the '94+ cars have it mounted to the front of the motor.
-'93s only have an oil fill cap on the valve cover while '94+ cars have a 3" or so extention piece that screw into the valve cover and have a cap on top.
'93s use an ECM with a removable chip that has to be burned for tuning. Can be a pain sometimes to tune but it's not all bad. '94+ cars use a PCM with a non removable chip.
-You cannot correct the speedometer after a gear change using a handheld tuner i.e. Hypertech, You have to install a speed calibration box (Dakota Digital SGI-5) and calibrate it manually.
-'93s are Multiport Fuel Injection while '94+ cars are Sequential Port.
-'93 V8 cars had 2 options for a manual. The M28 T-56 that came standard with 2.73s or a M29 (more common) with 3.23s. The M29 has great gearing for racing but were slightly weaker than '94+ T-56s. For a automatic, you have a one year only 4L60 (basically a standard 700R4) that still uses a TV attached to the TB.
-'93 camaros had all yellow lettering in the interior, i.e. gauge cluster, window switches etc. etc. The only yellow lettering in a '93 firebird is the hood pop handle.
The removable panel for the spare tire doesn't have Lock/Unlock embossed in the plastic like '94+ cars.

I'm sure i'm forgetting a few things yet these are basic differences and like I said, it's not that they are bad, it's just that they are different and sometimes finding '93 specific items can be a pain. Good luck!

One of these days i'm gonna create a whole archive with info and post it.

Last edited by 93M6Formula; Nov 1, 2012 at 09:07 AM.
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Old Nov 1, 2012 | 10:25 AM
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Thanks for all the info! Mine actually has a 3" extension for the oil cap. I hate the yellow lights :/ I miss my 94... Mine does have the M29 with 3.23's but I'm wanting to put 4.10's in it soon.
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Old Nov 1, 2012 | 11:43 AM
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Originally Posted by 94 z28 A4
Thanks for all the info! Mine actually has a 3" extension for the oil cap. I hate the yellow lights :/ I miss my 94... Mine does have the M29 with 3.23's but I'm wanting to put 4.10's in it soon.
No prob. Like I said, i'd run 3.73s with that trans. My car ran about 1900 RPM at 65 with them. You will be at around 2200-2300 RPM with 4.10s unless you don't mind. I'm at 1650 RPM with 4.10s and a '96 T-56 now.
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Old Nov 1, 2012 | 01:54 PM
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Did you have 2.23's before those? Cause right now at 55mph I'm between 1200 and 1300 rpms
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Old Nov 1, 2012 | 04:51 PM
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Originally Posted by 94 z28 A4
So you can put an LS1 lid on it without changing the hood or anything? The hood will clear it? Also I'm planning on putting 4.10's in it soon..
Yes sir you can.... mine has been on for 4 or 5 years now
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Old Nov 1, 2012 | 07:34 PM
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Originally Posted by 96lt1m6
Yes sir you can.... mine has been on for 4 or 5 years now
Nice! Do you have pics?
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Old Nov 1, 2012 | 08:25 PM
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Post up pictures!!!

93 FTW
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Old Nov 3, 2012 | 03:25 PM
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Originally Posted by 94 z28 A4
Did you have 2.23's before those? Cause right now at 55mph I'm between 1200 and 1300 rpms
Yeah my car had 3.23s originally.
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Old Nov 3, 2012 | 06:03 PM
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Is there something in the Manual's I don't know about??? My A4 can change the rear gear and correct for in the speedometer drive gear in the back of the trans. But my 4L60 is basically a re-named 700R4. Do the M6's have tone rings on the output shaft? More out of curiosity than anything.
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Old Nov 3, 2012 | 07:32 PM
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Nice choice! Good luck with it!
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Old Nov 5, 2012 | 10:05 AM
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Originally Posted by duh
Is there something in the Manual's I don't know about??? My A4 can change the rear gear and correct for in the speedometer drive gear in the back of the trans. But my 4L60 is basically a re-named 700R4. Do the M6's have tone rings on the output shaft? More out of curiosity than anything.
Yes there is no changeable gear in the T-56. It uses a reluctor wheel with a speed sensor. This is the same for all T-56s. You cannot correct the speedometer without the Dakota Digital box.
And yes on the 4l60, you can change out the gears but I don't know that they make one for certain ratios i.e. 3.90s, 4.10s, 4.56, etc and they wouldn't be that accurate with different tire sizes. So that box would have to be used on the auto also. I think it's great since you can literally adjust for whatever combo you have on the fly.
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