Stock 2000 A4 Coupe at the track = SLOW
09-12-2011, 05:57 PM
#21
Safety Car
Thread Starter
Now where have I seen that Green Corvette before........
Hey Ron.. 
For a loose comparison, my buddy has a bone stock 01, auto, I am not sure what gears, probably the 2.7x or something. That car ran a best of 13.70@102 mph and my buddy weighed like 280lbs at that time. They had bought the car new and it was his wife's DD so it was a virgin....
One more, a bit of a stretch but I had a bone stock 98' Trans Am A4 back in 98. With only a K&N filter and air box lid, it ran 13.76@103. That was with 2.73 gears and in pretty good Fall air...
I'd guess you are about 5 mph off depending on how bad your DA was...
For a loose comparison, my buddy has a bone stock 01, auto, I am not sure what gears, probably the 2.7x or something. That car ran a best of 13.70@102 mph and my buddy weighed like 280lbs at that time. They had bought the car new and it was his wife's DD so it was a virgin....
One more, a bit of a stretch but I had a bone stock 98' Trans Am A4 back in 98. With only a K&N filter and air box lid, it ran 13.76@103. That was with 2.73 gears and in pretty good Fall air...
I'd guess you are about 5 mph off depending on how bad your DA was...
09-14-2011, 01:23 AM
#22
Safety Car
Thread Starter
UPDATE
Well,
I took the intake track apart to clean the MAF. Got some MAF cleaner.
The MAF was dirty, but I can't tell you how dirty as I've never seen one up close before. So I cleaned it. I assume the critical area is the little devices between the parallel posts. They shine now. I need to research what they actually are being the electronic nerd I am.
The MAF part number is 25168491 and has no screen. From a later LS1 I gather. I found this article that explains the fact that the 2 MAFs have different calibrations.
http://www.ls1howto.com/index.php?article=25
So if my car wasn't tuned for it.......
I just left it in the lid of the Vararam. Speaking of which must be an old one because the filter was a mess. Some sort of foam looking thing that I think would fall apart if washed. I'm not sure how they ever called that a filter. It was clearly letting unfiltered air pass by it. So I'll get a K&N to replace it with and RTV it in place as others have suggested.
The air bridge was hacked on and looked like it could have been letting air leak around the rubber coupler to the TB. I RTV'd it in place as well.
The TB is 78mm and has a home porting job done on it. It was filthy. So I removed it and cleaned it as well.
I noticed an oily residue in the intake manifold. No doubt from the crank case vent system. I can only imagine what the back of the intake valves look like. Caked with gunk I'm sure.
Anyway, I have to wait on the air filter, so the car will be down for a few days. I'll let you know what happens.
Ron
Well,
I took the intake track apart to clean the MAF. Got some MAF cleaner.
The MAF was dirty, but I can't tell you how dirty as I've never seen one up close before. So I cleaned it. I assume the critical area is the little devices between the parallel posts. They shine now. I need to research what they actually are being the electronic nerd I am.
The MAF part number is 25168491 and has no screen. From a later LS1 I gather. I found this article that explains the fact that the 2 MAFs have different calibrations.
http://www.ls1howto.com/index.php?article=25
So if my car wasn't tuned for it.......
I just left it in the lid of the Vararam. Speaking of which must be an old one because the filter was a mess. Some sort of foam looking thing that I think would fall apart if washed. I'm not sure how they ever called that a filter. It was clearly letting unfiltered air pass by it. So I'll get a K&N to replace it with and RTV it in place as others have suggested.
The air bridge was hacked on and looked like it could have been letting air leak around the rubber coupler to the TB. I RTV'd it in place as well.
The TB is 78mm and has a home porting job done on it. It was filthy. So I removed it and cleaned it as well.
I noticed an oily residue in the intake manifold. No doubt from the crank case vent system. I can only imagine what the back of the intake valves look like. Caked with gunk I'm sure.
Anyway, I have to wait on the air filter, so the car will be down for a few days. I'll let you know what happens.
Ron
Last edited by RonSSNova; 09-14-2011 at 01:49 AM.
09-14-2011, 03:01 AM
#23
Team Owner
I took the intake track apart to clean the MAF. Got some MAF cleaner.
The MAF was dirty, but I can't tell you how dirty as I've never seen one up close before. So I cleaned it. I assume the critical area is the little devices between the parallel posts. They shine now. I need to research what they actually are being the electronic nerd I am.
The MAF was dirty, but I can't tell you how dirty as I've never seen one up close before. So I cleaned it. I assume the critical area is the little devices between the parallel posts. They shine now. I need to research what they actually are being the electronic nerd I am.
The dirty MAF and dirty filter (and oil in the intake manifold) may very well be contributors to your below average ET/MPH, hopefully things will improve now.
09-14-2011, 09:59 AM
#24
Drifting
UPDATE
Well,
I took the intake track apart to clean the MAF. Got some MAF cleaner.
The MAF was dirty, but I can't tell you how dirty as I've never seen one up close before. So I cleaned it. I assume the critical area is the little devices between the parallel posts. They shine now. I need to research what they actually are being the electronic nerd I am.
The MAF part number is 25168491 and has no screen. From a later LS1 I gather. I found this article that explains the fact that the 2 MAFs have different calibrations.
http://www.ls1howto.com/index.php?article=25
So if my car wasn't tuned for it.......
I just left it in the lid of the Vararam. Speaking of which must be an old one because the filter was a mess. Some sort of foam looking thing that I think would fall apart if washed. I'm not sure how they ever called that a filter. It was clearly letting unfiltered air pass by it. So I'll get a K&N to replace it with and RTV it in place as others have suggested.
The air bridge was hacked on and looked like it could have been letting air leak around the rubber coupler to the TB. I RTV'd it in place as well.
The TB is 78mm and has a home porting job done on it. It was filthy. So I removed it and cleaned it as well.
I noticed an oily residue in the intake manifold. No doubt from the crank case vent system. I can only imagine what the back of the intake valves look like. Caked with gunk I'm sure.
Anyway, I have to wait on the air filter, so the car will be down for a few days. I'll let you know what happens.
Ron
Well,
I took the intake track apart to clean the MAF. Got some MAF cleaner.
The MAF was dirty, but I can't tell you how dirty as I've never seen one up close before. So I cleaned it. I assume the critical area is the little devices between the parallel posts. They shine now. I need to research what they actually are being the electronic nerd I am.
The MAF part number is 25168491 and has no screen. From a later LS1 I gather. I found this article that explains the fact that the 2 MAFs have different calibrations.
http://www.ls1howto.com/index.php?article=25
So if my car wasn't tuned for it.......
I just left it in the lid of the Vararam. Speaking of which must be an old one because the filter was a mess. Some sort of foam looking thing that I think would fall apart if washed. I'm not sure how they ever called that a filter. It was clearly letting unfiltered air pass by it. So I'll get a K&N to replace it with and RTV it in place as others have suggested.
The air bridge was hacked on and looked like it could have been letting air leak around the rubber coupler to the TB. I RTV'd it in place as well.
The TB is 78mm and has a home porting job done on it. It was filthy. So I removed it and cleaned it as well.
I noticed an oily residue in the intake manifold. No doubt from the crank case vent system. I can only imagine what the back of the intake valves look like. Caked with gunk I'm sure.
Anyway, I have to wait on the air filter, so the car will be down for a few days. I'll let you know what happens.
Ron
09-14-2011, 10:45 AM
#25
Safety Car
Thread Starter
I only sprayed, didn't touch a thing.
So I decided to put this back together this AM so I could drive the car.
Whoever put this setup together with the Vararam used smooth tubing for couplers and basically got the main one to the TB too short. In essence, the clamps were barely holding this setup together. So I need to find some 4" ID silicone hose and redo this.
There is a reason that GM uses bellows for couplers. It is adjustable!
As for the Vararam, maybe they work as advertised, but the old version implementation is really sad. I think they should give the updated filter and top for free. I'll make it work with the K&N.
Interesting that a larger MAF was installed, the TB was ported, and smooth tubing was used on a stock engine.
Ron
So I decided to put this back together this AM so I could drive the car.
Whoever put this setup together with the Vararam used smooth tubing for couplers and basically got the main one to the TB too short. In essence, the clamps were barely holding this setup together. So I need to find some 4" ID silicone hose and redo this.
There is a reason that GM uses bellows for couplers. It is adjustable!
As for the Vararam, maybe they work as advertised, but the old version implementation is really sad. I think they should give the updated filter and top for free. I'll make it work with the K&N.
Interesting that a larger MAF was installed, the TB was ported, and smooth tubing was used on a stock engine.
Ron
Last edited by RonSSNova; 09-14-2011 at 01:02 PM.
09-14-2011, 09:00 PM
#26
Instructor
Member Since: Nov 2010
Location: Sublette Kansas
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Its definitely in the MAF and/or tuning. Get it data logged by a tuner asap! The power is wayy down. Most likely because its running way to lean. I wish you were from around here because I could log it for you, I do alot of custom EfiLive tuning around this area. Hopefully you get it figured out soon!
09-14-2011, 10:42 PM
#27
Team Owner
So I decided to put this back together this AM so I could drive the car.
Whoever put this setup together with the Vararam used smooth tubing for couplers and basically got the main one to the TB too short. In essence, the clamps were barely holding this setup together. So I need to find some 4" ID silicone hose and redo this.
There is a reason that GM uses bellows for couplers. It is adjustable!
Whoever put this setup together with the Vararam used smooth tubing for couplers and basically got the main one to the TB too short. In essence, the clamps were barely holding this setup together. So I need to find some 4" ID silicone hose and redo this.
There is a reason that GM uses bellows for couplers. It is adjustable!
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Last edited by LS1LT1; 09-15-2011 at 01:31 AM.
09-15-2011, 01:03 AM
#28
Safety Car
Thread Starter
We did copy the tune into HP tuners.
Is that any help?
Should we compare the MAF table to a stock tune providing we can find that data?
We didn't do any logging though. My buds program and he was tweaking his procharged Z06.
Ron
Is that any help?
Should we compare the MAF table to a stock tune providing we can find that data?
We didn't do any logging though. My buds program and he was tweaking his procharged Z06.
Ron
Its definitely in the MAF and/or tuning. Get it data logged by a tuner asap! The power is wayy down. Most likely because its running way to lean. I wish you were from around here because I could log it for you, I do alot of custom EfiLive tuning around this area. Hopefully you get it figured out soon!
09-22-2011, 02:38 AM
#29
Safety Car
Thread Starter
Update 2
I bought HP tuners.
Downloaded a stock 2000 A4 tune.
Compared it to the tune we copied from my car. (A great HP tuners feature)
My car has not been tuned for the 5 pin MAF.
Yes!
HP tuners is paying for itself already.
So now I have 2 choices. Re-tune for the 5 pin, or install a stock MAF.
LS How To has the table for the 5 pin. Or I'm sure I could find it in a tune for a stock 2003 car.
Fun stuff. I'll let you know how the car runs after.
Ron
I bought HP tuners.
Downloaded a stock 2000 A4 tune.
Compared it to the tune we copied from my car. (A great HP tuners feature)
My car has not been tuned for the 5 pin MAF.
Yes!
HP tuners is paying for itself already.
So now I have 2 choices. Re-tune for the 5 pin, or install a stock MAF.
LS How To has the table for the 5 pin. Or I'm sure I could find it in a tune for a stock 2003 car.
Fun stuff. I'll let you know how the car runs after.
Ron
09-22-2011, 11:33 AM
#30
Premium Supporting Vendor
Many people run the Halltech and the 85mm 5 wire MAF from the later years on the older cars. It is said that you get better response from moving the MAF up near the TB, your stock MAF would have been on the opposite side of the air bridge. Once tuned appropriately for the new MAF, it should not be slowing you down any more. It's a good swap, but not tuning for it is a bad idea.
Last edited by SDPC; 09-22-2011 at 11:37 AM.
09-23-2011, 04:26 PM
#32
Instructor
Hey Ron..
For a loose comparison, my buddy has a bone stock 01, auto, I am not sure what gears, probably the 2.7x or something. That car ran a best of 13.70@102 mph and my buddy weighed like 280lbs at that time. They had bought the car new and it was his wife's DD so it was a virgin....
One more, a bit of a stretch but I had a bone stock 98' Trans Am A4 back in 98. With only a K&N filter and air box lid, it ran 13.76@103. That was with 2.73 gears and in pretty good Fall air...
I'd guess you are about 5 mph off depending on how bad your DA was...
For a loose comparison, my buddy has a bone stock 01, auto, I am not sure what gears, probably the 2.7x or something. That car ran a best of 13.70@102 mph and my buddy weighed like 280lbs at that time. They had bought the car new and it was his wife's DD so it was a virgin....
One more, a bit of a stretch but I had a bone stock 98' Trans Am A4 back in 98. With only a K&N filter and air box lid, it ran 13.76@103. That was with 2.73 gears and in pretty good Fall air...
I'd guess you are about 5 mph off depending on how bad your DA was...
09-23-2011, 04:30 PM
#33
Instructor
Its definitely in the MAF and/or tuning. Get it data logged by a tuner asap! The power is wayy down. Most likely because its running way to lean. I wish you were from around here because I could log it for you, I do alot of custom EfiLive tuning around this area. Hopefully you get it figured out soon!
09-23-2011, 06:40 PM
#34
Safety Car
Thread Starter
I will install a stock MAF this evening. Save the larger MAF for when mods are done.
If the MAF fixes the issue, it will be very noticable immediatley in the seat of the pants.
13.5 @ 106 is light years from 14.3 @ 97.
Is there a way to reset the fuel trims or should I just let it idle for a while and then drive it?
I just got the HPT hardware today. I don't know how to use it yet.
If it feels good, back to the track tomorrow eve.
Ron
If the MAF fixes the issue, it will be very noticable immediatley in the seat of the pants.
13.5 @ 106 is light years from 14.3 @ 97.
Is there a way to reset the fuel trims or should I just let it idle for a while and then drive it?
I just got the HPT hardware today. I don't know how to use it yet.
If it feels good, back to the track tomorrow eve.
Ron
09-24-2011, 01:51 AM
#35
Team Owner
09-24-2011, 03:00 AM
#36
Safety Car
Thread Starter
FIXED!
Thanks.
I made the VR power Duct work by putting the correct MAF in the stock location and getting the connection hose I had to work. I'd like VR to send me correct hose, if I can get hold of them. Their email bounces.
Anyway, it's a new car! Agressive where it was lazy. Improved throttle response. It actually stands up and marches on a 3-2 downshift on the freeway! I mean it goes. Shoot, it's almost fast now.
Drags next weekend weather permitting. It got too late today. And I want to let it learn more while I drive it.
Shoot, I got my HPT kit in the mail, I can even log it and see how it's doing.
I'm happy now!
Ron
Thanks.
I made the VR power Duct work by putting the correct MAF in the stock location and getting the connection hose I had to work. I'd like VR to send me correct hose, if I can get hold of them. Their email bounces.
Anyway, it's a new car! Agressive where it was lazy. Improved throttle response. It actually stands up and marches on a 3-2 downshift on the freeway! I mean it goes. Shoot, it's almost fast now.
Drags next weekend weather permitting. It got too late today. And I want to let it learn more while I drive it.
Shoot, I got my HPT kit in the mail, I can even log it and see how it's doing.
I'm happy now!
Ron
Last edited by RonSSNova; 09-24-2011 at 09:47 PM.
09-27-2011, 10:51 AM
#39
Safety Car
Thread Starter
09-27-2011, 10:53 AM
#40
Safety Car
Thread Starter