Glad you are happy with the car Brian, I hope it runs good at the track for ya.

 

Fad2blk_98

Your car is so nice looking!!! I love it!

 

It is even better in person

 

Yep, I've been out the last two weekends. As for the idle and street driving no problems. We had the idle set around 850 at first and the car didn't really like it. Supertune Performance set it back a little higher for me (around 900) and it idles and starts great now!

KCFormula - Very happy with it Joe, and happy with how you and everyone at SuperTune Performance worked with me to get it running just like I wanted it. You guys are awesome there Thanks!

CarsRFun - Thank you for the compliment on the car! Thanks again also Chris

 

You said this car is tuned? Was any WOT tuning done at all?

I ask because your AFR is all over the place, and pretty lean in most places. In your second pull in particular, there is a point where it almost hits 15:1! Who "tuned" this car?

Disclaimer: I am in no way trying to flame you, so please don't take it as such. Whoever "tuned" your car did a **** poor job IMO, as far as WOT is concerned at least, and if you paid money for it you've been ripped off.

With that said, if your car was properly tuned, you'd be seeing better numbers. Your AFR starts at 14:1, rises to almost 15:1, briefly falls to around 13:1, and then floats between 13-14:1 for the rest of the pull. And if your AFR is this jacked, who knows what your timing looks like? I would also be very surprised if you aren't getting a ton of KR, especially where your AFR hits 15:1. A WOT AFR this lean I would even consider dangerous, especially not knowing what your timing and KR values are.

Again, I think you have the potential to make a good bit more power with a proper tune. If a "professional" "tuned" this car, I'd demand your money back and take it somewhere else.

And I have to agree, that's one damned fine looking Firebird!

 

Actually I can tell you right now that I know for a fact that they were having a problem with the KR. I also know that they were having a problem figuring out the timing. When we left they said that they were able to get everything straightend out.

The shop did spend a lot of time on the car and they were very polite. If there is something that needs to be done with the tune how would it be fixed.....The tuner's co worker has actualy posted in this thread so maybe he can take a look at what you might be able to suggest.

 

I would think w/that size cam you should be able to attain better numbers w/your current mods...but if you're satisfied, that's what really counts.

 

Well, I'm glad to hear that at least the shop seems to be legitimately trying to get it right as opposed to just throwing some **** together and sending it out the door. That being said, it looks to me like whoever did this tune doesn't have a very good handle on LS1 tuning, despite their best intentions. The reason they are having such a problem with KR is because the WOT AFR is extremely lean. A good rule of thumb is an AFR in the 12.8 to 12.9 range. The AFR shown in the graph is lean to the point that it could very well cause severe detonation at WOT, and possibly engine damage.

When they said they were able to get everything "straightened out", I suspect they meant that they pulled out timing until the KR was minimized. As such, he stands to gain power not just by fattening up the AFR, but by also being able to advance the timing since it won't be running so lean anymore.

The easiest (not the best) way to get the AFR in line will require the tuner to just modify the PE table, which is not very difficult to do with a wideband equipped dyno. The tuner simply has to log wideband output and modify the commanded AFR divisor in the PE table for a given RPM until the AFR falls into line. That's the quick and dirty way. A more correct way would be to just set the commanded AFR divisor for the AFR desired, and then correct the VE table until the correct AFR is achieved.

Personally, I'm not sure I'd be comfortable taking my car back to a shop that let a car with an AFR like that out of it's doors. We're talking basic stuff here. But, it sounds like they are willing, and if he doesn't have a problem with it he should definitely take it back, and not accept the tune until it's done right. I'm sure he paid good money for the tune, and he deserves to have a correct tune that's not going to rob him of power and be a potential danger to his engine.

 

Hopefully you'll get the tune straightened out, I think your numbers are down a little. I put down 401 through my locked A4, but I do have a pulley and ported TB. I'm way down on the TQ though (352), Which has me considering making another cam change already.

 

15.1 were the hell is that ??????? I wonder

 

At about 3200 RPM his AFR hits almost 15:1.

 

not to stray from the topic, but where did you get this front lip? looks awesome

 

That is a sweet looking car.

There is definitely some power to be squeezed out there. Is it my imagination, or are your torque numbers a little low at low RPMs?