won't stop raining!

[robertisaar]

I don't know how well the OBD1 defs are opened up for the transmission section.

using a 16149396 PCM, there are LOTS of options as far as tranny tuning. there are almost too many, really...

[95SleeperAcheiva]

(sigh) why can't i just get a point and click interface? Who ever at GM decided in MPH shift points needs to be dragged out in the street and shot!

I'd rather take the comp out of the tranny equation completly.

[robertisaar]

Who ever at GM decided in MPH shift points needs to be dragged out in the street and shot!

agreed that its dumb, but using the moonwell efi gear ratio calc works for me...

[asylummotorsports]

The spacers between the UIM and LIM are a waste of time and money.

NOTHING to be gained there!!

Been there, done that! The air doesn't spend enough time in there to heat up OR cool even 1/10th of a degree.

The Aurora TB I don't know, but the TCE 62mm is probably all you need.

I gained nothing going from an MRZperformance 62mm bored and sleeved TB to the 65mm TCE unit performance wise!

It's akin to putting too big a carb on an engine.

[IsaacHayes]

robertisaar, sweet I was wondering about that. tunerpro def not tunercats right?

Intrigues had the 3.5 too. Car-part will cross reference. I've heard of people using ply wood to make the spacers, then sealing it lol. maybe even MDF would work if sprayed with a high temp engine paint or something. mcmaster car I'm sure has pheonlic. Check ebay too sometimes you can find small materials with cheap shipping on there for small projects.

OBD1.5 shifts by RPM... but of course you can't tune it... but at least you can change the FDR without the ECM freaking out and acting weird. Does the OBD1 shift by MPH? I know OBD2 does both I think.

[robertisaar]

robertisaar, sweet I was wondering about that. tunerpro def not tunercats right?

Intrigues had the 3.5 too. Car-part will cross reference. I've heard of people using ply wood to make the spacers, then sealing it lol. maybe even MDF would work if sprayed with a high temp engine paint or something. mcmaster car I'm sure has pheonlic. Check ebay too sometimes you can find small materials with cheap shipping on there for small projects.

OBD1.5 shifts by RPM... but of course you can't tune it... but at least you can change the FDR without the ECM freaking out and acting weird. Does the OBD1 shift by MPH? I know OBD2 does both I think.

i have 3 definitions for DF(16149396) that i use, depending on how detailed i need to get. only 1 of them has tranny options and thats the one from the file archive on here. i want to say it was done by Sil?

[IsaacHayes]

McGavinZ26 had some results by placing a bag of ice on the UIM. So I think it helps some. When I went drag racing I just kept the engine on with the AC on so the fan was on and that kept the engine cool and didn't allow heat soak. I could place my hand on the UIM and it was just luke warm. Shut it off and yes it gets very hot then.

The 65mm isn't too big, as in too big that it hurts anything. I have one on my un-tuned 3100 with mods and it's fine. The throttle response is up a little but it's not an On/Off switch like some fear. Going bigger (70 or 75) probably would be though. The Olds TB is for the cheap DIY'er that doesn't mind a little fab work to get it on their car. If you want to just bolt on and go like stock the TCE unit is THE way to go.

I really like mine but I'm sort of biased since I came up with the idea and got it going. Geldarbt thought of it as well too as he found one as well. I thought the LX5 might have a 65mm TB and it did! LOL

Either way just go 65mm. That's the same diameter as the 3500 LX9 Upper and therefore less chance for turbulence. Plus always more room for future upgrades.

65mm = 2.56"
56mm = 2.20"
52mm = 2.05"

Kind of funny, I went from stock 2" TB and exhaust, to 2.5" TB and exhaust. Hey makes sense right??

[robertisaar]

Kind of funny, I went from stock 2" TB and exhaust, to 2.5" TB and exhaust. Hey makes sense right??

i believe in maximum boost, corky bell says that 400ft/sec for intake and 250ft/sec for exhaust would be ideal, but whatever, those numbers don't seem very realistic to me. thats having an exhaust with 60% more area than an intake. i'm not sure what size diameter that would come out to, but it seems a bit conservative to me.

[3400-95-Modified]

OBDI ecm's don't have a shift point by MPH and RPM??

OBD1.5 was an odd ball, or the mph was set low... going from a 2.97fdr to a 3.33fdr on a 94-95 beretta ecm was possible... its not on a 96, you'll hit a rev limiter on the 1-2 shift every time, and throw a trans slippage code for the FDR being wrong. In OBDII there are two triggers, a MPH and a RPM level, Both have to be reached for the car to shift, so in my application I have my mph's set low so they are always achieved, I then fool with my WOT RPM points to make them what I want... This is also not fool proof, I have trouble getting the right finish RPM since 1-2 shift slips about 500-600 rpm after its commanded to when it actually starts to shift or completes the shift... so If you command 6200 rpm you'll see 6750 or so for a peek RPM before the 1-2 shift.

Mine is now set for 5800 so I'm hitting a peak of 6200 or so, since with my new converter I wont need to rev the piss out of the car, it will have more low end than before.

Oh and Eric, that 13.8 was on a stock 3400 OBDI.5 3.33FDR and the 100 shot of nitrous, and my first trans I built. no tuning.

I have since run the 13.9 n/a on the newest trans I did, which has much less modifications than my first. I didn't do any valve body valves or such on this one.

[robertisaar]

OBDI ecm's don't have a shift point by MPH and RPM??

i remember seeing a TPS/MPH table, i don't think the PCM gives a shit as to what RPM its at, just as long as the MPH is right.

[3400-95-Modified]

Thats a bummer

[robertisaar]

Thats a bummer

how so? its less things that need configured to accomplish the same thing. just use the moonwell calc and you have the WOT part done, then just scale them down for less throttle, and should you find it necessary, fine tune from there. the only advantage i know of comparing 1 to 2(or 1.5) is that 1 doesn't use a PWM solenoid, so shifts could be rough if you have a lot of throttle into it and it shifts too soon, but as long as you make note of it, you can fix it.

[IsaacHayes]

Correct me if I'm wrong, but OBD1.5 doesn't use PWM either. I know it doesn't use it for the TCC for sure. But I've hit the throttle right as it's doing an up shift at low speesd and it shifts hard.

[robertisaar]

Correct me if I'm wrong, but OBD1.5 doesn't use PWM either. I know it doesn't use it for the TCC for sure. But I've hit the throttle right as it's doing an up shift at low speesd and it shifts hard.

pin a13 is tcc pwm. i've been told if your pwm wires get cut, it'll usually shift pretty rough all the time

[IsaacHayes]

Hmm. Well I can feel my TCC engage and dis-engage on the HWY more than newer GM cars...