Results after PCM programing.........
A friend o mine with a FRC and my self decided to fly-in an expert in PCM programming. His name is Chris Bennight from Corpus Christi, Texas. He arrived on Friday night and on Saturday morning at 9:00 am we started working on my car. First of all we took off the Haltech sidewinder and installed the Black Wing, then disconnected the MAFT and proceeded to scan the car. First programming was done for the SVO30 injectors. He had a full table from FORD and the correct conversions for the LS6. Pushed the torque management from 350 LB/ft to 800 (as if I will ever get there). Since there are no dynos here in Panama we had to test drive the cars in order to get accurate info. Our first trial the car was popping through the mufflers. He adjusted the timing. Our next trial, from idle to 2,000 RPM the engine was hesitating a little bit, again adjust the timing. Finally he deactivated the O2 sensors located after the main cats. Reason for this is that next Saturday I will take out both of them. Not because of the 3 o 4 additional HP, but for the stronger sound I am looking for. After 5 hours of adjusting and testing I am glad and happy to say the car is pooling like hell. According to his calculations the car is producing 385 RWHP. No knock, no anything, just perfect. In my honest opinion, this is the ONLY way to go if you are serious about your mods and the only way to make does mods REALY deliver their potential. A MAFT will only take you 1/3 of the way. Programming is the key here. Since I do not know and don’t dare try to fiddle with this kind of surgery, my best bet is to go with a pro. And invest on his plane tickets, hotel stay and professional services.
My friend car has a stroker engine (I believe 412CID) and at the end of his PCM adjustment he was producing 485 RWHP. And with out the 200 shot of nitro. That car sounds like the old 426 hemi and rides like a bat out of hell.
Dan.

 

Hmmm....not bad. Wonder if there are any pro in the SF Bay Area...hmmmm.....

Take it easy, and thanks for the post...

:cheers:

 

Dan; could you tell me what his "Professional Services" fee was?

I would guess he charges by the hour with a certain minimum?

Thanks very much.

Pat

 

congrats :cheers: :cool: :cheers: :cool:

 

Muffler,
His charged me 500.00 that comes about 100.00 per hour.
Dan

 

Not sure how he could possibly dial-in the WOT A/F ratio without a wideband O2 on a dyno. He was probably shooting in the dark and just hoping to get close. The stock O2 sensors can not accurately measure WOT A/F ratio.

He did not deactivate the rear O2 sensors. He just turned off the diagnostic checks that get run on them. This will stop the Service Engine light from coming on when you pull the cats.

Why do you need a Grantelli MAF if you are tuning the PCM on a relatively stock car? That part is supposed to modify the MAF signal to change the A/F ratio and it justs complicates your tuning.

Some people feel that raising the TQ management level to an incredible number (like 800) can cause issues with related systems (like Active Handling). I have no proof that is true but I would have estimated your engine's torque value and then raised it to something just beyond it, like 400 ft-lbs.

385 rear wheel HP sounds like a really big stretch for a 2001 with these minor mods. Stock 2001 Z cars usually put down about 330 or so to the rear wheels. From what I have seen I would guess with your mods and proper tuning that you would be somewhere in the 360 range.

 

Rbartick,
Thanks for your comments. Again, I am no expert but this is what was done
- He did use a wideband O2. And test runs were done live on the road since we do not have a Dyno in town.
- Deactivating the O2 sensors. You are probably right. Never the less there are no codes coming after taking out the cats. But again these rear sensors are basically there to tell you when they are out of order. The sound is MUCH better and probably picked some extra ponies.
- Granatelli MAF was taken out, mainly because we could not install the Balckwing filter. So used the stock MAF, narrower mouth. You must be talking about the MAFT (maf translator). You are correct since we re-program the PCM there is no need for this device. But since it is so well installed (soldered and stuff) we decided to keep it there for the time being but all dials are set to 0. So there is no effect of it being there or not being there.
- TQ management. Again your are probably right. But I have really hammered down the car and in some instances were the rear was about to come out. AH came on and started doing its job. So I figure I am not affecting the performance of AH. I understand that the TQ management feature has more effect on auto trans than on a manual.
- Again, we do not have a Dyno. But figures that headers, Injectors, Intake, PCM tuning can easily give an additional 40 to 50 rwhp. So we have 330 stock + 50 it give about 380 to 385. Worst case scenario I will say 370. Can not complain about that…..
The most important thing here is that by the seat of my pants this car is holing some serious butt. Was able to race a restore 69 mustang with a small block and I was able to pull at least 7 cars ahead of him. Third gear on this baby is brutal. (sorry for any misspelling)
Dan

 

>He did use a wideband O2.

Ok, he must have some sort of portable wideband setup. That sounds very good.

>Granatelli MAF was taken out, mainly because
>we could not install the Balckwing filter. So used
>the stock MAF, narrower mouth. You must be
>talking about the MAFT (maf translator).


No, I was talking about the Granatelli. Some of those Granatelli MAF devices will change the MAF signal based on load to help lean out WOT. I am not sure if you had one of those.
http://www.granatellimotorsports.com...automotive.htm
Quote from this page:
"The advanced, active-electronic module packaged within the sensor provides improved control of injector timing and ignition timing.
"


>TQ management. Again your are probably right. But
>I have really hammered down the car and in some
>instances were the rear was about to come out.
>AH came on and started doing its job. So I figure
>I am not affecting the performance of AH.

There is much debate on this subject and I am not sure of the truth. I set my TQ Management to 380 ft-lbs just to be on the safe side. I did not feel comfortable moving it to a sky high value.

>Again, we do not have a Dyno. But figures
>that headers, Injectors, Intake, PCM tuning
>can easily give an additional 40 to 50 rwhp.

IMO, that sounds unrealistic. I've seen a good number of Z06 dyno runs and I've never seen 50 RWHP from these types of mods.


>The most important thing here is that by
>the seat of my pants this car is holing
>some serious butt.

Enjoy!

:cheers:

 

:cheers: :cheers: :cheers: