wg871

iTrader: (15)

Got to test out the FAST 90/90 on my bolt on 99 SS this past week in 1/8 only.
I still have not got the car tuned, this may be some of my problem.

Last time out at the same track my mods were
Hooker Super Comp Longtubes
Hookey OR Y Pipe
Hooker Catback
SLP Lid w/ ram air
On stock LS1 intake, 3.23s and Chrome Zr1s
Went 8.2 @ 88mph with a 2.0 60'

Same mods, Same track, the only difference this time out was
Fast 90 intake, 90mm Nick Williams throttle body, SLP 85mm MAF, Front Swaybar Delete and Skinny Draglite fronts, still on the same rear tires.
The best I could get was 8.41 @ 87 with a 1.99 60'.
The car is running rich, you can smell it through the exhuast. It really needs a dynotune bad.
Anyways here is a pic from that day

deelong4002

iTrader: (8)

Damn. I would have figured the skinnys would have made you at least go faster. Sounds like you need a tune really bad.

wg871

iTrader: (15)

Im hoping the tune will at least get me back where I was, then I will work my way down. I am wanting to make a 7.99 1/8 pass with just bolt ons, which shouldnt be too hard. After the 7.99 pass a converter will go in.

Pewter53

iTrader: (36)

get a converter and dip deep in the 7's.

work in progress

iTrader: (2)

Nice pic! Looks like a much harder launch than 1.99, Front sway bar removal lets the front come up nice!!

Villain281H

iTrader: (5)

Agreed the tune likely needs some work, even without knowing the weather condition differences between the runs. The lack of mph and your mention of rich is the deciding factor.

Derek

MikeG

iTrader: (33)

IMO, this thread is a letdown! All you're saying is on an untuned bolt-on car, a FAST will not help. Your tune was already not spot on since your header install, and the intake swap most likely made it worse. I was hoping for a true before/after comparo on a more level playing field I guess.

wg871

iTrader: (15)

IMO this will be a true before/after comparison because I will update it again when I get it tuned, so we can see all aspects. Sorry for the letdown but it is what it is, just letting people know what to expect on a fast without a tune

Goat2NV

iTrader: (19)

You might have seen better result if you kept your stock MAF on there. But either way as stated before, there's alot of horsepower being left on the table without a tune.

JonCR96Z

iTrader: (33)

You tell him, Mike.

Given the results I had, I don't think you'll get a 7 with the FAST before the stall. You would have been more likely without it. I waited til I had my stall and still gained nothing. From dyno results I've seen with FASTs on mildly modded cars there usually is a small loss up until the 4-5000 rpm range and then only a small gain. My car leaves around 4500 and never drops below 5300 after the shifts and I still didn't gain. Your car probably isn't even to 3000 by the 60'. On your average 1/8 pass you probably see more rwhp loss than gain (tune or not). Your slight 60' gain was probably solely from the skinnies (maybe weather changes too). In a true before and after FAST swap I bet it would have slow down as well.

Just to bust your ***** some more, that would be more of a before and after tune results. If you happen to be at a track that I'm at before you get it tuned, I'd be more than happy to log a pass for you with my wideband and let you know where you're at as far as the tune goes. And depending on how generous I'm feeling that day I may make a few changes for you, assuming that it works out like that.


Or they may have been worse. It's hard to say what mod did what to the AFR. It may be perfect now where it was off before, but you just never know without actually knowing. Smelling rich at idle or part throttle means nothing when talking about WOT passes. My AFR with a FAST swap was barely off at all. It was actually a tad bit leaner which may have made it faster untuned, but my tune was spot on before the FAST as well and all I changed was the FAST

wg871

iTrader: (15)

Haha yea you called it Jon, it slowed my car down. I couldn't pass up the deal I got on it though. I do have some pre 90/90 dyno numbers I will post results on that also after a tune

passnu2

Even with a stock stall I would think you should be able to pull off a 7 sec at piedmont? My bolt-on 6spd ran 7.99 @ 92mph with stock clutch, 3.42 gears, and eagle F1's. After I changed the cam I went 7.79 @94 with the same set up and stock tune.

JonCR96Z

iTrader: (33)

What does being at Piedmont have to do with it?

7.99 on Eagle F1s? That's one of the fastest street-tire bolt-on M6 f-bodys there are. That's an awesome time (if it's true), but it means absolutely jack **** to an automatic car, especially with a stock stall.

passnu2

My point is Piedmont is known for how good it hooks. I haven't been to a track that hooks like piedmont. That's all I was trying to say. As far as my time it really doesn't matter if anyone believes it or not. They can ask anyone around Burlington about a SOM SS.

JonCR96Z

iTrader: (33)

I don't believe this car is trying to spin is what I was trying to say. It's not easy to get a bolt on stock stall A4 to spin on any decent track.

Your times are still irrelevant whether I believe them or not.

wg871

iTrader: (15)

Just out of random curiosity your car dosnt have a gmmg catback does it? If so I may know of your car

passnu2

Yes it has GMMG

wg871

iTrader: (15)

I got a couple buddys in mebane that were telling me about your car, small world...

wg871

iTrader: (15)

double post

passnu2

Yes it is.