axe1993

I'm new to the ls1 world so forgive me if this is a beat to death topic. I have a 01 z28 with just a slp lid. The factory air box under air cleaner has been opened up. I run Mickey Thompson e.t. streets. Stock 3.23 rear and exhaust. I'm running the automatic trans. This year during cool weather and great traction all I can get was a 13.67 @ 102. Most of time its running 13.80s. I just learned that I have the ls6 intake from factory. The same person told me something is wrong with my car because I should be a lot faster than his lt1. Is this true? I'm just wondering if I need to start some serious investigation over the winter. Any feedback would be greatly appreciated. Thank you

HCI2000SS

iTrader: (2)

I'm not sure what state you are in, but here at one of our local tracks in Michigan that's about what a stock LS1 f-body runs to be honest. Sounds fairly average to me

LS WON A4

iTrader: (1)

Stock F-Body LS1's usually run anywhere from a 13.3 to 13.6. With anything, there ARE exceptions; some completely stock F-Body LS1's run 12.9-13.1, some 13.6-13.8.

In 2,000ft DA or so, my bone stock '98 Z28 A4 ran a 13.6 in the 1/4, 8.8 in the 1/8th. But it had 170k miles and 235 all-season tires.

murphinator

iTrader: (2)

an ls1 camaro with a lid , 323's , ls6 intake on MT drag radials running 13.67-13.80 yes that sounds slow to me.

you said good traction , what were your 60 foot times ?

your trap of 102 sounds in line with your et's - trap speeds are a great indicator of how much power your making , that trap is low unless you run at a high altitude track or its hot & humid which you said it was cool weather

was your car heat soaked ? did it have chance to cool off before racing and between passes ?

is there any additional weight in your car , big stereo , big wheels , junk in the trunk etc..

LS WON A4

iTrader: (1)

Just searched his post history and found out he's running at Mo-Kan Dragway in Asbury, MO.

OP; what day, and what times also, did your runs occur?

garygnu

do a hi-flow exhaust and a higher rpm converter . get a mail order tune and you mite run mid 12s.

axe1993

I can't locate time slips but I believe my two 13.67 passes the 60 ft was 2.08. It was in October when I made these runs. I believe the temps were in the 60s. I do know I have a very bad cat. The guts are rattling when its cold. That may be the problem. Plus she is at 114,000 miles and no tune up. Plan on changing plugs and wires soon.

MonmouthCtyLS7

iTrader: (6)

Yea sounds like an average time, your 60 can improve. That would probably put you right where you belong for your mods

RPM WS6

iTrader: (3)

You seem to be a bit down on power. 102mph is a bit low of a trap speed for a stock '01 A4 3.23, car you should be able to run a couple of MPH higher even stock.

If the cat substrate is actually loose and rattling around as you mentioned, then this could certainly be an exhaust restriction and should be removed/repaired. At 114k miles, I'd do plugs and a full filter/fluid change as well. In addition, I would also clean the MAF.

Doing these things could easily get you back to original stock power levels.

LASTOFTHEBREED02T/A

iTrader: (15)

Your times are ballpark... Dont expect 12's at stock level. When i first got my ride, the maintenance was not up to par at all. Still went out to the track to test and see where it was at. My 60 was around 2.0-2.1 (street tires) 13.9 @ 106 In Humid Texas Heat.


You should be a bit faster on sticky tire, Heat em up really good 2nd gear 60mph burn out and load the ride atleast to 1500 rpm. Should be able to pull a 1.9/1.8 60 and be mid to low 13's.

axe1993

Thanks for all your input guys. My plans are new exhaust, new AC/delco iridium plugs, pro tune and hopefully converter and adjustable torque arm. My next question is with an auto will the stock rear hold up or should I upgrade that first then do other mods later when more cash flows in?

codyvette

iTrader: (24)

Run the rear until it brakes. It may last a very long time. Mine has. I just wouldn't spend a ton of of money on it.

BOBS99SS

iTrader: (2)

Times seem normal to me,your rear will be fine in an auto,for sure get a stall

I8UR4RD

iTrader: (16)

sounds like the car just needs a little TLC. id take care of that cat first thing. get some headers and offroad y pipe and boom you dont have to worry about it ever again. after that...get a 3600 stall then a cam, and tune it. drive it for a year or two while you save for the rear end or a bigger forged motor.

RPM WS6

iTrader: (3)

The stock rears can hold up for a long time with an auto, even a stalled auto. Just make sure you don't have wheel hop issues (good shocks, aftermarket LCAs, and you're already planning the TQ arm anyway). People think these rear ends will break if you sneeze at them, but that's only true if you have an M6 trans.

Oh, and the people that are telling you that your times are "normal" must not be paying attention to that fact that your trap speeds are 102mph on a 60 degree day at low elevation. Under those conditions, an '01 hardtop/t-top 3.23 A4 car with an air lid should be trapping a couple MPH higher if everything was in perfect working order. But I think your issues are easily solveable with the exhaust repair and a complete tune up (plugs, air and fuel filters, MAF cleaning, and possibily some Seafoam if you're having KR - knock retard - issues at all).

bwolfZ28

iTrader: (40)

Whats the DA usually when you are making those passes? Reason I ask is because my local track is about 6800ft DA and cars run slower. But you could def have some small issues as to why your running slow. FWIW at 6800DA my 02 z28 was trapping 103mph with full exhaust and stock tune.

RPM WS6

iTrader: (3)

Asbury, MO was the town listed. Elevation there is 899 feet, and temp was stated to be 60°F. Based on those conditions, and the details of the car, 102mph is a bit slow. But I think the missing power can be retored based on what I posted above.

HCI2000SS

iTrader: (2)

I remember watching a buddy of mine run his bone stock 2002 WS6 (auto) at Milan here in Michigan, and he would pull consistent 13.3-13.4 @ 103 with around 1.9 60fts all day

axe1993

Thanks for all the info. I thought my car ran good. Now I can't wait till next season to start. Glad I can use the stock rear for a while and invest my cash in other areas. Hopefully this will take care of my inconsistent issues also.

buddhaz06

iTrader: (8)

Where you located? I'm near pittsburg, ks. I have a 98 trans am a4 car with 2.73's and with only a k&n filter I ran 13.8-14.0@102 w/ a 2.1 60ft. It was at mokan. Look up Midwest bowtie boys on Facebook