This seem right
Thread Starter
Racer
Joined: Jun 2003
Posts: 464
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From: JACKSONVILLE FL
This seem right
Took my car to the track a while back (first time with the Supercharger). Going over the time slips between stock and after the install noticed something I did not expect.
Below is what I gained (best run vs best run).
60' mark = .015 seconds quicker after supercharger
1/8 mile = .507 and 7.42 mph faster
1/4 mile = .776 seconds and 6.2 mph faster
Best supercharged run was 11.78 @ 121.65.
I always thought the mph was low but comparing timeslips I noticed I picked up more mph in the first 1/8 than the last. Is this normal? I thought I would pick up more on the back half.
The car is an 2011 GS, A6 ALL stock including runflats, except the ECS SC600 kit and 1 7/8 headers.
So, is this normal??
And what will it take to get to 130 mph +/-?? How much would meth help??
Below is what I gained (best run vs best run).
60' mark = .015 seconds quicker after supercharger
1/8 mile = .507 and 7.42 mph faster
1/4 mile = .776 seconds and 6.2 mph faster
Best supercharged run was 11.78 @ 121.65.
I always thought the mph was low but comparing timeslips I noticed I picked up more mph in the first 1/8 than the last. Is this normal? I thought I would pick up more on the back half.
The car is an 2011 GS, A6 ALL stock including runflats, except the ECS SC600 kit and 1 7/8 headers.
So, is this normal??
And what will it take to get to 130 mph +/-?? How much would meth help??
Burning Brakes
Joined: Oct 2005
Posts: 1,057
Likes: 202
From: Michigan
Have you had it on a dyno? My LS3 A6 on stock tires with headers ran 11.9@119mph. I would be stumped if I had only picked up a few mph.
You have clicked off better MPH and Times - but not enough from a blower. You should have picked up 8+mph and a good .8-1 second improvement.
You have clicked off better MPH and Times - but not enough from a blower. You should have picked up 8+mph and a good .8-1 second improvement.
Le Mans Master
Joined: May 2011
Posts: 5,022
Likes: 18
From: Tampa FL (formerly Justinjor)
Tech Contributor
St. Jude Donor '11-'12-'13-'14
There is a guy at my local track who is having almost the same issue you are. He just put an A&A kit on the car, stock everything else, and is running mid 12s@118-120mph.
Why are you running runflats though? If you want to run 130s, you're going to need to have the car setup for a 1/4 mile pass. Do yourself a favor and at least put a real tire on the back to give yourself a fighting chance.
What is your 60' time pre-blower and post-blower. The improvement is a good thing, but if you went from a 2.2 to a 2.15, that is part of your problem. With a crappy launch, you essentially handicap yourself for the rest of the race.
You want 130+mph in the 1320' but you're really trying to do it in 1260' since your launch is potentially so terrible. Post up your timeslips so we have a better understanding of your launch, 330' time, etc.
Why are you running runflats though? If you want to run 130s, you're going to need to have the car setup for a 1/4 mile pass. Do yourself a favor and at least put a real tire on the back to give yourself a fighting chance.
What is your 60' time pre-blower and post-blower. The improvement is a good thing, but if you went from a 2.2 to a 2.15, that is part of your problem. With a crappy launch, you essentially handicap yourself for the rest of the race.
You want 130+mph in the 1320' but you're really trying to do it in 1260' since your launch is potentially so terrible. Post up your timeslips so we have a better understanding of your launch, 330' time, etc.
Thread Starter
Racer
Joined: Jun 2003
Posts: 464
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From: JACKSONVILLE FL
Here is how the time slips broke down:
Stock--- S/Ced
60'--- 2.089 --- 2.074
330'--- 5.488 --- 5.186
1/8 --- 8.254 --- 7.747
MPH --- 89.26 --- 96.68
1000 -- 10.602 --- 9.932
1/4 --- 12.559 --- 11.783
MPH --- 115.45 --- 121.65
Le Mans Master
Joined: May 2011
Posts: 5,022
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From: Tampa FL (formerly Justinjor)
Tech Contributor
St. Jude Donor '11-'12-'13-'14
Your MPH in the 1/8 seems really low. I'm at 494whp and see over 100mph in the 1/8th. Do you have any video of your launch or anything? How about a scanner? Can you look at your runs and tell if timing is being pulled? Without some concrete information, it's hard to diagnose a problem.
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Race Director
Joined: Mar 2007
Posts: 11,331
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From: Missouri City Texas
That all seems very, very slow.
You're either blowing your tires away constantly going down the track or are having some serious power issues in the tune.
How much power did you make on the dyno? I'd think you should at least be making high 500s.
You're either blowing your tires away constantly going down the track or are having some serious power issues in the tune.
How much power did you make on the dyno? I'd think you should at least be making high 500s.
Thread Starter
Racer
Joined: Jun 2003
Posts: 464
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From: JACKSONVILLE FL
Well, I am postive it is not a traction issue, at least not past the start. I only made two passes but the first pass I took off VERY easy, had a 2.16 60' that pass (no spinning at all) and ran 11.90 @ 121.4.
Second pass took off alittle harder, had just a bit of wheel spin, got the 2.07 60' with a 11.78 @ 121.6.
I know the ET would improve greatly with some drag radials but what about the mph? Would a 1.7 60' improve my mph very much.
Also the car made 543hp and 530 ft/lbs on the dyno @ 10psi less than a week before I ran it at the track.
Second pass took off alittle harder, had just a bit of wheel spin, got the 2.07 60' with a 11.78 @ 121.6.
I know the ET would improve greatly with some drag radials but what about the mph? Would a 1.7 60' improve my mph very much.
Also the car made 543hp and 530 ft/lbs on the dyno @ 10psi less than a week before I ran it at the track.
Le Mans Master
Joined: May 2011
Posts: 5,022
Likes: 18
From: Tampa FL (formerly Justinjor)
Tech Contributor
St. Jude Donor '11-'12-'13-'14
The longer you keep your RPMs in their optimal powerband, the more average horsepower you'll have for the run, and thus, the higher your mph will be.
When I first got my cam installed and I ran it at the track, I was disappointed as I only went 11.5@122 which was a 0 ET and 4mph improvement. 4 trips to the track later, same setup and the only change being skinnies and passenger seat removed, I ran 10.8@128mph.
You are leaving a LOT on the table with such a weak launch. Keep your rpms up and dont let it bog and you'll see massive improvement.
Do some searching on here as well. There have been a lot of 'my car isn't doing on the dragstrip what it's supposed to' thread lately.
When I first got my cam installed and I ran it at the track, I was disappointed as I only went 11.5@122 which was a 0 ET and 4mph improvement. 4 trips to the track later, same setup and the only change being skinnies and passenger seat removed, I ran 10.8@128mph.
You are leaving a LOT on the table with such a weak launch. Keep your rpms up and dont let it bog and you'll see massive improvement.
Do some searching on here as well. There have been a lot of 'my car isn't doing on the dragstrip what it's supposed to' thread lately.
Thread Starter
Racer
Joined: Jun 2003
Posts: 464
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From: JACKSONVILLE FL
Your MPH in the 1/8 seems really low. I'm at 494whp and see over 100mph in the 1/8th. Do you have any video of your launch or anything? How about a scanner? Can you look at your runs and tell if timing is being pulled? Without some concrete information, it's hard to diagnose a problem.
But judging from the responses, I think I am going to have the car looked at again. I just don't see how 160+ hp improvement can only get me 6 mph in the 1/4
Le Mans Master
Joined: May 2011
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From: Tampa FL (formerly Justinjor)
Tech Contributor
St. Jude Donor '11-'12-'13-'14
Put some skinnies up front, pull the passenger seat and front sway bar, spend some time at the track, then come back and report. I'd bet the car is running ok, but there's a lot to be said for driver mod.
It's not meant to be an insult at all, but these cars are difficult to launch and drive well in the 1/4 mile. Read up on Ranger's techniques and try and get some video of your launches. I think the best way to learn is to look at what you did and critique and improve. Scan your runs and/or pick up a GoPro and mount it inside so you can see the shift points and how well/poorly you're shifting.
It's not meant to be an insult at all, but these cars are difficult to launch and drive well in the 1/4 mile. Read up on Ranger's techniques and try and get some video of your launches. I think the best way to learn is to look at what you did and critique and improve. Scan your runs and/or pick up a GoPro and mount it inside so you can see the shift points and how well/poorly you're shifting.
Thread Starter
Racer
Joined: Jun 2003
Posts: 464
Likes: 0
From: JACKSONVILLE FL
When I first got my cam installed and I ran it at the track, I was disappointed as I only went 11.5@122 which was a 0 ET and 4mph improvement. 4 trips to the track later, same setup and the only change being skinnies and passenger seat removed, I ran 10.8@128mph.
You are leaving a LOT on the table with such a weak launch. Keep your rpms up and dont let it bog and you'll see massive improvement.
You are leaving a LOT on the table with such a weak launch. Keep your rpms up and dont let it bog and you'll see massive improvement.
To be honest, I really don't want to invest in a full set of drag tires. I don't plan on tracking this car very often, probably not even once a year.
I guess the obvious and easiest solution will be more HP
Thread Starter
Racer
Joined: Jun 2003
Posts: 464
Likes: 0
From: JACKSONVILLE FL
Put some skinnies up front, pull the passenger seat and front sway bar, spend some time at the track, then come back and report. I'd bet the car is running ok, but there's a lot to be said for driver mod.
It's not meant to be an insult at all, but these cars are difficult to launch and drive well in the 1/4 mile. Read up on Ranger's techniques and try and get some video of your launches. I think the best way to learn is to look at what you did and critique and improve. Scan your runs and/or pick up a GoPro and mount it inside so you can see the shift points and how well/poorly you're shifting.
It's not meant to be an insult at all, but these cars are difficult to launch and drive well in the 1/4 mile. Read up on Ranger's techniques and try and get some video of your launches. I think the best way to learn is to look at what you did and critique and improve. Scan your runs and/or pick up a GoPro and mount it inside so you can see the shift points and how well/poorly you're shifting.
)I probably could play around with the launch some though. I only made two passes that day.
I have to be honest, I don't have the skill to drive a 6 speed down the track.
I have kicked around the idea of getting a gopro also, they seem to be good little cameras.
Burning Brakes
Joined: May 2006
Posts: 1,110
Likes: 16
From: stuart fl
its not you, unless you are letting out of it, but an A6 car with 500+rwhp should be able to hit 130mph +. you have a problem with the car, if you can get a scanner on there it will help you find it.
Le Mans Master
Joined: May 2011
Posts: 5,022
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From: Tampa FL (formerly Justinjor)
Tech Contributor
St. Jude Donor '11-'12-'13-'14
A full set of drag tires can be had for a relatively low amount of up-front money. You will also save money in the reduced wear/tear on your street tires.
You can get C5 wagon wheels for about 80-100 for the pair. My Toyo TQs DRs were $280 shipped for the pair. Add mounting/balancing and you're well under $500 for a decent set of wheels/tires to use for the dragstrip. Toyos aren't the BEST DR by any means, but I can cut 1.5-1.7s all day.
GoPros are really cool and can be a great tool as well.
You can get C5 wagon wheels for about 80-100 for the pair. My Toyo TQs DRs were $280 shipped for the pair. Add mounting/balancing and you're well under $500 for a decent set of wheels/tires to use for the dragstrip. Toyos aren't the BEST DR by any means, but I can cut 1.5-1.7s all day.
GoPros are really cool and can be a great tool as well.
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From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
I would see if someone can data log for you, also I have had customers have no idea they were spinning down the track.
Also the A6 can be very finicky, short shifting etc. Having your tuner at the track would be a BIG help. I do not feel adding more power is the answer, yet..
Also the A6 can be very finicky, short shifting etc. Having your tuner at the track would be a BIG help. I do not feel adding more power is the answer, yet..