He gave his 60' so that it a mute point.

 

Well best of luck to you man. I hope you get it figured out, and the problem nailed. it makes me scared of mine. I've actually never ran at the track before... i dont wanna bomb at 13.5+

 

Track experience means a lot...

I'm sure guys that cracked below 13s stock weren't first timers or even newbies for that matter.

You can have an awesome car - but it takes a lot of practice to learn it and do well in the 1/4mi...

 

I'm going to run it a few times as it is now, but in about 2 months i should be pushing near 420ish rwhp. I'm going to have to go very easy on the launch as to not send my diff out the back, but I'm expecting maybe low 12's with a good trap. what do you guys think?

 

Was it indeed a 30th anniversary t/a? that expalins it all thats about right for the LT1 convertable to run high 13's moded lightly. Ive got A 35TH ss and my buddy has a 35th trans Am. his car runs 13.4 and mine is 13.08 some ls1 are faster than others. We were both stock at time @NED (local strip) i mean his was supposed to have a little less curb wieght too. ive seen some LS1's that run 14 second passes all day long. And others that the driver just cant shift the thing but you both had auto's as did we. Sometimes too we make changes to our cars and they seem to have go back the other way reactions performance wise, so to speak. Like the old saying goes dont do too many changes at once or else you wont know what to undo. That may be my case with this new convertor i ran 13.08's last year completely stock. Add a convertor and drag radials and i become slower. This could have something to do with this guys case in the 30th or 35th edition t/a.
Tempramental LS1's indeed!

 

Both of these cars need tunes to remove TM, adjust shift points, and get the AFR right and they'd run a LOT better.

 

You guys are thinking of 30th ann. CAMARO = 97 = LT1
30th ann. Trans Am = 99 = LS1

 

'99 Trans Am 30th edition? but thats two years after the '97! Then why was the 35th's were in 2002 why would the 30th t/a be in 99 that doesnt make any sense at all. Sorry just aint computing is all.

 

You have to take into account the weather, track elevation and traction. If you ran the car in high heat then you will have bad numbers as opposed to running in cooler weather. For example, I ran 13.5 @ 103 with just lid and catback on a 90 degree July afternoon. With no changes to the car I ran 13.1 @ 106 on a 55 degree October night. And this was at 700 feet above sea level. You take my car back then and run it in Denver or parts of NM and I'd be lucky to break out of the 14's.

Your car does seem to be a tad underpowered IF the dyno numbers in your sig was with all the current mods. I would expect your car to pull closer to 320 rwhp with a lid, catback and LT's. You may be running a little rich or a little lean in the A/F ratio. I would suggest you get a stall, drag radials and then a good dyno tune. I bet you run mid 12's all day long after that (see my sig).


Well for one the convertible weighs more so that is not helping him any. But even so his car is definately not running right. I bet his car is running wicked lean or maybe has a bad spark plug/wire. I bet if he gets a full tuneup and then a dyno tune that he also finds all his missing horses.

 

Actually looking at your sig .. all you realy have is lid, catted LTs and an exhaust ... given your 60's and depending track conditons, your times are in the ballpark.

As for the T/A ... too many unknowns. Maybe the guy just can't drive or whoever tuned his car really screwed the pooch.

 

I've heard that Torque Management is what holds the new GTO back from running exactly with LS1 F-Bodies. Is this true?

I've also heard that TM makes the tranny last longer because it deadends the shifts a little bit.

I think my car may be running a little rich because the exhaust fumes are stronger with the headers on.

So do you think a professional dyno tune is the definite answer?

 

I should have deleted my sig. dyno number because that was with a Magnaflow muffler back in '04. Maybe it's around 330RWHP now.

 

Camaro's were 35th's Anniversary Editions
Firebird's were Commerative Editions (hence they are known as CETA's)

 

You're confused because you are thinking F-bodies as a general whole instead of Camaros and Trans Ams.

Camaros and Firebirds came out the same year (1967) but Pontiac doesn't celebrate the birth of the Firebird. It only celebrates the birth of the Trans Am which was in 1969.

So Camaro anniversary models are in years with 7s and 2s and Trans Am anniversary models are in years with 9s and 4s and there are no anniversary model Firebirds that I can remember.

 

TM holds all late model A4 cars back some and yes it's by softening up the shifts. You can easily gain ET by having it removed but it's at your own risk as it could, and I mean could not will, cause premature failure of your trans.

A dyno tune on a car with mods will always help, if the tuner knows what he's doing, but it's not majic and no one can guarantee that it's the definite answer to all your woes.