My 89 Camaro Project

[2.8/3400 1985 Camaro]

Ah, the last year before they got fat and heavy, lol, I actually looked at buying those when i wound up getting the camaro, we should race sometime if you're up for it, once I get my maro back on her feet ofc. I'd probably lose in my current configuration, but I need a baseline 1/4 time for the car yet before I do the real heavy mods, and its funner racing something more than just a clock :P
Just realized, that's got a dohc doesn't it?

[2.8/3400 1985 Camaro]

Glad to hear it is coming along. You definately have a unique ride.

How much HP are you estimating so far at WOT? I can only imagine what the intake sounds like at high throttle.

And since he's not replied, I'll take a crack at an estimate based on the config, I don't offhand recall what all mods he has in his car, but I'm thinking he probably has close to, but maybe not quite 300 hp, it should be pushing at least 300 tq though I imagine, I would be surprised if he were under 250 for either though.

[Schmieder]

No DOHC, 3100v6 SFI OHV (L82)

Before the manual swap, I was estimating around mid 300 ft/lbs. 320-360 ish area. But thats because I am pushing boost. My goal is to generate as much power w/ as little boost as possible.

Race? maybe someday. I got to get it on the road first...almost there.

Mwahahahaa, a getrag 282 with modified bell housing for a hydraulic tob and an EP LSD. Both wheels are gonna grab real nice behind the spec 3 clutch/lsd combo.

[Superdave]

right around 350 HP/300 TQ @ the crank.. maybe a little more. The Datalogs from today are showing me some scary things at WOT... These ITB's are proving to be very tricky when it comes to AE tuning.

[3400-95-Modified]

right around 350 HP/300 TQ @ the crank.. maybe a little more. The Datalogs from today are showing me some scary things at WOT... These ITB's are proving to be very tricky when it comes to AE tuning.

How are you dialing in your AE if you don't mind me asking.

I've been able to get mine to not hesitate when the throttle is punched and I don't notice a huge rich dip after leaving the line or something similar so I'm only assuming I have mine pretty close, but then again I don't know how much more critical AE is for you OBDI guys vs me with the MAF sensor.

[Schmieder]

To answer the AE question 3400-95-Modified

This is how I dialed in my AE. I had to use excel to nail it.

LINK to HPTuners Forum

After I tuned the AE, my throttle response was crisp and the rate of rpm increase was faster too. But I was targeting a specific AFR previously determined to be the best for RPM deltas.

The trick is make a change, observe what that change did then scale to hit the target AFR. It will take some work and brain crunching but it is worth it.

Superdave: Whats up w/ the AE? Are you logging AFR per cylinder or over all AFR? A wideband per cylinder is crazy expensive but probably worth it running ITB's.

Is it a tuning issue or a mechanical issue?

[3400-95-Modified]

damn, thats in depth... thanks for the link.

[Superdave]

It's in the tune, just need to tweak the tables a little more.

If I go from light throttle 100% TPS instantly it goes into PE mode and commands a 12.7 but the actual creeps up to near 20:1 for a few seconds.. prettty scary. light throttle blips and it falls on it's face going lean.. just needs more fuel.

[robertisaar]

AE on a gen3 alone is tricky if you don't have tables to base them off of... found that one out the hard way. coolant based spark correction is quite a bit different as well.

tables that work pretty well with a mildly cammed 3400:

AE Multiplier vs AE Pulses (F100)
1.75
1.75
1.66
1.50
1.25
1.00
0.75
0.50

AE Multiplier vs D-TPS (F101)
0.537
0.918
0.762
0.653
0.560
0.490
0.459
0.420
0.389
0.358
0.327
0.288
0.257
0.233
0.202
0.163
0.132

AE Multiplier vs Coolant Temp (F102)
0.703
0.648
0.609
0.578
0.539
0.477
0.391
0.297
0.219
0.148
0.070
0.000
0.000
0.039
0.070

AE Multiplier vs Barometric (F103)
0.649
0.751
0.852
0.997
0.997

AE Multiplier vs IAT (F107)
0.063
1.102
1.070
1.031
1.000
1.000
1.023
1.094
1.125

TPS Filter vs Coolant Temp (F104)
0.122
0.122
0.122
0.122
0.122
0.122
0.122
0.122
0.122
0.122
0.122
0.122
0.122
0.122
0.122

Timeout Reduction Factor of F104 vs Start-Up Coolant (F105)
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.030
0.022
0.026
0.030
0.030
0.030
0.030
0.030
0.938
0.938

Timeout Reduction Factor Multiplier vs Start-Up Coolant (F106)
0.977
0.977
0.977
0.977
0.969
0.969
0.969
0.969
0.969
0.969
0.969
0.969
0.969
0.969
0.985

D-TPS in 12.5mS needed to Enable AE (KTPSAE)
2%

D-TPS Every 12.5mS needed to Remain in AE (KTPSAEEN)
1.6%




hope these help.

[Superdave]

all that is relative to the injector size and BPC.. and VE of the engine.

Here is the delta TPS table from before i was running the ITB's..

0.15
0.28
0.28
0.28
0.28
0.19
0.19
0.19
0.19
0.19
0.19
0.37
0.35
0.35
0.26
0.26
0.26


Once i figure out the lingering problems the tuning should go a lot quicker. part throttle seems to be decent although my NBo2 input isn't working, no VSS input is making it hard to analyze the logs and the FP voltage is all over the place. Just the typical shakedown problems after a swap like this though.

There are mechanical issues as well, i can't ignore the amount of gear oil that the rear end has leaked out, i also need to get my posi carrier in there. It needs an alignment bad and half the interior screws are missing so it's a rattle box.. I'm also seriously considering re-working my headers to improve ground clearance and overall flow. Right now i have roughly 3" from the ground to the lowest point of the exhaust, if i cut off the collectors and re-route the primaries i can make some significant changes there, add length and also add the option for cutouts.



I plan on addressing most things this weekend...

[Superdave]

Before the ITB's i had a ported 3500 UIM and a 75mm TB.. that's what the AE is tuned for currently... and it was near perfect before...

Here is a sample that shows just how much more air 6 45mm ITB's flow than the old plenum..






you can see that once i floor it she goes WAY lean.. don't mind the NB02 volts, that's fixed now.

[mfuller]

Whoa. Just a tad lean, eh? What are you using for fuel injectors again?

[Superdave]

33lb/hr M1's got the WOT fuel in a safer range, AE is still off though. I'm going to be pretty close to maxing these injectors out, might have to find some 36's with a tight spray pattern.

Been out driving/tuning and figured i should post some new pics...











Got the trans issues pretty much squared away. I broke down and ordered a VSS for a 90-92 Caprice with the D8B police interceptor option, it's got both the cable output and the magnetic so i can make my ECM happy and keep the stock speedo.

The car still needs an alignment bad but i want to swap in a new pair of front springs so i can lift it up an inch or so before i take it in. Lots of other rattles, squeaks and random things to fix as well. It is nice to finally be able to drive it around though.

[bob442]

i would lower the rear a 1/2-1" or just leave it. the stance looks really aggressive. especially with that huge hood!

[Superdave]

i'm getting a little nervous about oil pan clearance, i have about 3" right now and about 2.5" to the lower K member tube. I think if i give it an inch or so in the front it should be ok.

the rears are stock V6 camaro springs, fronts are stock with 1.5 coils cut.