Dyno Guesses & Bench Racing Forum - car just wont run...




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supersean
05-17-2009, 03:58 AM
Didnt really know what section to put this is so im putting it here. My car has got me puzzled. Ive got a 00 ws6, a4, hedman lt's and y-pipe and magnaflow, ls6 intake, mti lid, rebuilt trans and the car will not run for shit!
best it has been with all of this is 8.91 @ 82 mph with a 2.06 not spinning much at all...very sad i know. no, the car has not been tuned yet but geez it should def be running 10x better than this untuned i think, maybe ive just got the slowest ls1 car produced, hell idk, just aggravating.


bowtiebuilder
05-21-2009, 01:20 PM
You running at the valley?

bowtiebuilder
05-21-2009, 01:21 PM
When I first bought mine, 100% bone stock was 8.78!


k-mart
05-21-2009, 03:57 PM
Your problem is obvious. You're a Cards fan!

J/K I'd say get a tune and get it on they dyno to see exactly what's going on before getting too depressed about this.

PS: C-A-T-S

ponygt65
05-21-2009, 05:19 PM
WHat do you consider running like shit?...you mean under normal driving, or simply the ETs/TS?

I'll presume your times. I fyou expected more..what's the DA of hte track?....and YES, a Tune will benefit ALOT. It amazes me how many guys on this site do a bunch of mods without tuning it.

supersean
05-22-2009, 12:15 PM
yea i run at the valley...no positive on the DA used to know but forgot. The car seems like it running smooth then goes 8.91 @ 81 mph pretty slow for a full bolt on car i think..maybe im crazy tho. o yea if i were a CATS fan the prolly wouldnt even start! haha

ponygt65
05-22-2009, 01:49 PM
yea i run at the valley...no positive on the DA used to know but forgot. The car seems like it running smooth then goes 8.91 @ 81 mph pretty slow for a full bolt on car i think..maybe im crazy tho. o yea if i were a CATS fan the prolly wouldnt even start! haha

Stock stall and gears?

Honestly, I think the 'gains' you were looking for are being left on teh table from not having a custom tune. The HP gains that are advertised are both 'best case' and mod with a Tune.

Get a custom dyno tune done, and I bet you'll see better numbers. :chug:

supersean
05-22-2009, 02:06 PM
yea the stall might as well be stock is around 2400-2600 nothing crazy at all...the guy that redid my trans has a yank 3800 he said i could put in and try out to see if id like it..he seems to think itll be too much for the car but from what ive read i disagree. should i tune it before the converter being that i may not keep it? or wait?? thats what has me thinking...

ponygt65
05-22-2009, 02:40 PM
yea the stall might as well be stock is around 2400-2600 nothing crazy at all...the guy that redid my trans has a yank 3800 he said i could put in and try out to see if id like it..he seems to think itll be too much for the car but from what ive read i disagree. should i tune it before the converter being that i may not keep it? or wait?? thats what has me thinking...

I'd wait until after. I dont' see why a 3800 would be bad. :confused: Either way, I'd swap it in and go for a test drive. Just keep in mind that you still won't get teh full feeling until you've got it tuned. What rear gears do you have or better yet, which ones are you planning on going with?

supersean
05-22-2009, 02:59 PM
ive got stock 3.23s and plan on keeping them since i drive on the highway some

supersean
05-22-2009, 03:02 PM
since you say wait til i get the converter before then tune...say what if i decide to take the stall back out?? will that mess the tune up??

ponygt65
05-22-2009, 04:48 PM
ive got stock 3.23s and plan on keeping them since i drive on the highway some
That may be why he said 3800 is too much. that's his opinion and you'll just have to ask around.
since you say wait til i get the converter before then tune...say what if i decide to take the stall back out?? will that mess the tune up??
I'm not 100% sure to be honest because I'm not all to familiar with tuning perimeters with autos, but it would be best to do so.

I sent an email to a guy named Darrin that does ALOT with AUtos. I'm not sure if he does only mustangs, or GMs too. I'll letyou know what he says. :chug:

Texas Heat
05-22-2009, 07:52 PM
STALL!!!!

I had a 99 Z28 with about the same mods as you, and when I slapped a Yank PT4000 stall in it I dropped 7 tenths in the quarter and was pulling 1.7 60's.

bowtiebuilder
05-22-2009, 09:42 PM
Go cards!!!

supersean
05-23-2009, 01:19 AM
STALL!!!!

I had a 99 Z28 with about the same mods as you, and when I slapped a Yank PT4000 stall in it I dropped 7 tenths in the quarter and was pulling 1.7 60's.


Now thats the kind of shit im looking for! haha i know i need the car tuned and surely with that 3800 stall, the car doesnt have much choice but to move out half way decent...im not looking to set any records, id just like the car to run sum 8.30-40's which i dont see being impossible

SPLATT
05-23-2009, 01:38 AM
Stall will work wonders on that car. get the 60 down, and a good stall and you will be set!