In the 12's now with ls6 conversion
07-07-2011, 07:17 AM
#21
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?
07-07-2011, 05:48 PM
#24
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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
07-07-2011, 09:37 PM
#26
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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.
07-08-2011, 08:34 PM
#27
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.
07-09-2011, 07:26 AM
#28
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.
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.
07-09-2011, 07:42 AM
#29
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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
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
Last edited by HioSSilver; 07-09-2011 at 07:48 AM.
07-09-2011, 12:05 PM
#30
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
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
07-09-2011, 12:24 PM
#31
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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.
07-09-2011, 05:29 PM
#32
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
07-09-2011, 10:53 PM
#34
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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 have dropped 37-40 lb off my crank with lighter clutch/balancer.
07-10-2011, 08:14 AM
#35
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?
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?
07-10-2011, 10:22 AM
#36
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This is a 5.5" clutch
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.
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.
uDoes 115 mph seem a high trap speed expectation for an a4 ls6?