12 Second Club - In the 12's now with ls6 conversion

I have an 02 trans am with ws6 hood and lower air box, lid, P/P/T/B(with bypass) A.I.R. delete, 243 heads, 02 z06 cam pacesetter LT and ORY, flowmaster catback, panhard bar kyb agx rear shocks(only suspension upgrades) crap tires and a frost tune.

the first week out my best e/t was 12.89 best trap was 111,
this past friday was a lil bit better. I did take my carpet out to clean it so i said what the hell let me go run it, I had to let it dry any way. Other than that I have not had the back seat in for a wile and I take my spare and jack out when I go to the track. My best this past friday was 12.79@109.50 D/A 1325
60 2.075
330 5.534
1/8 8.323@88.57
1/4 12.797@109.5
My 1/4 trap seems low to me on average i only gain 21-22mph on the big end.
Yes a stall is in my future.

has the car been tuned? that thing is way down on power.

60' isn't very good. Are you spinning a lot on launch?

has the car been tuned? that thing is way down on power.

frost tune...Yea My trap is lower than I expected

60' isn't very good. Are you spinning a lot on launch?

Crap tires, I don't spin much but I am soft out of the hole so I don't spin.
With my tires the best 60 I have had was a 1.9 so ill sort that out on down the road.

Ok, traction on launch will help a lot, lol. Going to put a cam in sometime?

Ok, traction on launch will help a lot, lol. Going to put a cam in sometime?

yea ill be saving up over the winter for some suspension. Spring...tires, stall, and hopefully a 12 or 9" by the end of next summer. Cam... I dunno I might go turbo one day might not, not sure yet. I need to make up my mind first, that is why I am not going to be putting a stall in till next year.

I don't know how the ls6 conversion you have would compare to a crate ls6 like I have (#'s in the sig). I would think the tune is way off or something is wrong. My bolt-on ls1 went better than your ls6 conv. Funny part is the stock tune should be pretty close to a ls6....atleast mine was.

I don't know how the ls6 conversion you have would compare to a crate ls6 like I have (#'s in the sig). I would think the tune is way off or something is wrong. My bolt-on ls1 went better than your ls6 conv. Funny part is the stock tune should be pretty close to a ls6....atleast mine was.
You would think it would not be much different if any at all. I have checked every thing and the mech end is fine

Get rid of the flowmaster for starters. Mine really liked it when I went to a single 6" round dynomax 3.5" muffler over the optional slp SS exhaust.

Are you getting any knock retard?

No codes, and I am going to a flowmaster merge (2)3-4 and a cut out.

what was the temp.? Maybe heat is just costing you time? My times from spring and fall vs mid summer vary by .3

what do you think I should be trapping at 115-118?

what was the temp.? Maybe heat is just costing you time? My times from spring and fall vs mid summer vary by .3 about 80 DA was 1325

i'd be looking for 115 at least.

for comparison sake, my lid/muffler m6 car went 8.29 @ 88 with a da of 2250'. granted, that is not the norm et for a stockish m6 car, the trap is close to what others do. it's a 99 car on stock everything; clutch, slave, master, intake, tb, etc etc etc. literally 2 mods. i'd be straight up pissed if i did all that work and gained 1 mph in the 1/8 and nothing in the 1/4...

How inaccurate is the factory tach? It shows It shifting at 6100, but its suppose to be 65, speedo off a bit as well. I gained
4-5mph from this conversion.

Get a 3200-3600 yank ss converter and bump up the shift point 200 rpms if ylou are shifting at 6100

How inaccurate is the factory tach? It shows It shifting at 6100, but its suppose to be 65, speedo off a bit as well. I gained
4-5mph from this conversion.

Shoot me an email with your full name so that I can look up your file. If the car is shifting at 6100, that's where the MPH is being lost, or quite a chunk of it.

email sent thanx

your 1/8th mile time isnt that bad bt ya the top end is really lacking. I just did the ls6 swap in my car with a frost tune and while I cant tell what rpm 1-2 shifts at because I spin but 2-3 happens right at 6500 so def check the tune.. Does 115 mph seem a high trap speed expectation for an a4 ls6?

Not at all. I trap 124+ with a crate ls6.

Ya but that's with an m6 with a 5.5" clutch and some other mods helping is there anything else other than whats in your sig. I mean a 400whp car trapping 124 close to full weight is damn fast

It's been a little work to get there but everything is pretty much in the sig. I'm always working to get weight off the car but it's still a complete car with all ammenities. Just the ls1 to ls6 swap got me from 112.8 to 118+. That was un bolting one and bolting the other in....not even tuned. A good auto should get there

if i could get a 115-116 trap as i sit with the ls6 i'd be happy as hell lol im at sea level so that would probably help as well.

That should be easily attainible. Make that auto shift @ 6700. Find a set of used Harland sharp 1.7 Stock ratio rockers. Port the tb if it's not already or find a fast intake. Get rid of that mac catback and reduce a little weight and you should be close to 120mph. I don't have my fast on yet. I'm actually hoping with the fast it should pick up a little more. I'm also gonna do a couple aero mods and it will be about 60# lighter when I go back to the track. I'll be looking for a 10 sec. pass @125+ I hope.......pretty good for a stock crate motor in a dd car.

That should be easily attainible. Make that auto shift @ 6700. Find a set of used Harland sharp 1.7 Stock ratio rockers. Port the tb if it's not already or find a fast intake. Get rid of that mac catback and reduce a little weight and you should be close to 120mph.how do you figure he'll pick up 9 mph with those mods? that's equivalent to roughly 100 hp. also, why do you suggest ditching the stock rockers for HS 1.7s? the stock rockers have been proven to perform (and better than most aftermarket with regard to high[er] rpm) great on a stock cast (and others) head.

you also need to recognize that your crate ls6 is nowhere near the norm.

i REALLY don't see an ls6 a4 fbod car going 120 mph at full weight unless he is racing in great weather offering a very low or even negative da.

how do you figure he'll pick up 9 mph with those mods? that's equivalent to roughly 100 hp. also, why do you suggest ditching the stock rockers for HS 1.7s? the stock rockers have been proven to perform (and better than most aftermarket with regard to high[er] rpm) great on a stock cast (and others) head.

you also need to recognize that your crate ls6 is nowhere near the norm.

i REALLY don't see an ls6 a4 fbod car going 120 mph at full weight unless he is racing in great weather offering a very low or even negative da.

While 120 is pretty high I could see it done with his mods an empty gas tank and a very good da. He said he picked up 6mph with the swap with no additional mods which is believable seeing as the ls6 made 413 on the dyno. An ls6 through and m6 can easily touch over 400hp. Either way idk what an a4 should really trap but i think 115-116 should be attainable pretty easily either way the op's trap is really low bolt on ls1's run that speed. Kind of bench racing but it does make sense

I think mine is normal, it's a normal crate ls6 that anyone could buy. There has been many go over 400rwhp....I mean hell anyone can do this. The rockers freed it up a bit at high rpm, although it made no difference on the dyno. I went from bolting it in the car and running 12.0's to 11.1 with only adding 8rwhp via ewp, a switch from macs to kooks, makeing my own exhaust and some weight reduction, 5.5 clutch and faceplated t56.
He probally needs to turn it harder and get a bigger stall. Maybe even a set of kooks, their hard to beat. Lots of stuff you can do to go faster besides adding power. The 1/4 mile is a race of acceleration, and the engine is just 1/2 of that equation.
I don't know what the da was that day. I had to make a gear change from 4.11 because it was hitting the limiter @ 6800 ( going 122+mph) to 3.90 to make it threw the 1/4. That was awhile back. So it's not like it was a fluke. It awlays goes over 122 anymore

I think mine is normal, it's a normal crate ls6 that anyone could buy. There has been many go over 400rwhp....I mean hell anyone can do this. The rockers freed it up a bit at high rpm, although it made no difference on the dyno. I went from bolting it in the car and running 12.0's to 11.1 with only adding 8rwhp via ewp, a switch from macs to kooks, makeing my own exhaust and some weight reduction, 5.5 clutch and faceplated t56.
He probally needs to turn it harder and get a bigger stall. Maybe even a set of kooks, their hard to beat. Lots of stuff you can do to go faster besides adding power. The 1/4 mile is a race of acceleration, and the engine is just 1/2 of that equation.
I don't know what the da was that day. I had to make a gear change from 4.11 because it was hitting the limiter @ 6800 ( going 122+mph) to 3.90 to make it threw the 1/4. That was awhile back. So it's not like it was a fluke. It awlays goes over 122 anymore
Well thought out response man and it makes sense. Jw though I just switched out my stock 16 snowflake wheels for some 18 american racing wheels so ya they are a bit heavier but I barely spin with these now so I still think I gained. Did you notice any difference in weight between the 18's and other wheels in terms of speed. I realize times and trap will vary with weather but was it a huge difference.

My 18's are light. They're SSr's and weight 18# apiece. My 18" wheel/tire combo comes in at 38-42# depending on tire ware. Rotating weight is where it's at, get rid of as much of it as you can. Right now the car is 40# lighter and 6# of that was rotateing since the last time I ran. I think I can find another 20# in her too. I'm fully expecting it to go 10's on a decent day with decent track prep. I have a couple aero mods to do to. I think 125-126mph is attainable. The right set-up with a auto should go 120+ and maybe a quicker time as my 60' sucks.

ya unfortunately my wheels arent exactly light hahah they are ar rebels. like i said though i spun horribly with my stockers so these are an improvement considering lol. How much do you think they'll hurt the 1/4 times? Btw sorry op for the thread jack

WOW this thread went on its own lol yea I talked with frost, and im going to get a wide band to see if the AFR is off ( just replaced the o2s no improvement) AS stated the DA was 1325

Well red... 1lb rotating weight is equal to about 3 lb dead weight at axle speed. If it's weight off the engine speed (ex. lighter clutch/converter) then 1lb = 15 lb dead. This info is from Herb Adams chassis book.
I have dropped 37-40 lb off my crank with lighter clutch/balancer.

i am well aware that getting a quicker ET is only half the equation. but getting a car to trap more takes 1 of 2 (or both) things: more power, less weight.

how many other ls6 fbody cars do you see trapping 122+? how many of them are 4l60e cars? let's be realistic. i haven't seen any. and just because you get a freak motor and actually know how to mod/drive it doesn't mean everyone else does.

how many full weight h/c cars do you see trapping 124? not very many. even with cams much larger than an ls6 and heads that flow better don't offer that performance easily. so you saying anyone can buy a crate ls6 like yours, do the exact same mods you did and go 124 mph is a stretch. be real, man. 124 mph is 450 whp all day in a full weight car. not the norm from an ls6 setup, period. so please stop telling the op it is just that easy, because it is not. if it was the case everyone would have an ls6 cam and stock 243 heads. most everyone wants big power and dead stock driveability.

what is a 5.5 clutch?

This is a 5.5" clutch
http://i143.photobucket.com/albums/r136/HioSSilver/new1035.jpg
I never said my car was full weight. I said it was complete with all creature comforts. I like to think of it as constructivly lightened. I don't know of any fbodys with a ls6 doing what my car is doing and not many h/c cars either. But some of the better thought out bolt-on ls1's are in the 11's (and that's not all that hard) so there is no reason why a ls6 with bolt-ons and 60 more hp should'nt do better. Sometimes big cams and heads are'nt all their cracked up to be. I have answered everything honestly so there is no reason why someone else could'nt copy what I've done or even improve upon it with a car setup more towards drag raceing.

NIce man keep it up

:pimp:uDoes 115 mph seem a high trap speed expectation for an a4 ls6?

No 113-115 should be the norm I believe.