my ET's dont match my mods?
06-22-2011, 08:13 PM
#1
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my ET's dont match my mods? 99 camaro ls1, a4 with a precision 4000 stall.
12 bolt, full suspension, 3.73 gear. 15 inch skinnies, and 275/50 drag radials. .224/.230 cam, fast 102 intake and throttle body. Upgraded fuel pump. Long tube headers, off road y pipe, flowmaster catback. aftermarket lid with k&n. ABS deleted.
Car is a base model. Hardtop, manual locks and windows. No idea at the weight.
Made 384rwhp thru the stalled auto and 12 bolt.
Only ran 7.90@87 mph with a 1.70 60 foot. The mph shows that the car did NOT spin.
There are cars with my same mods running anywhere from 7.20 to 7.50. I am way off.
performance shop owner has offered to go to track tomorrow and see if he can find any problems.
thoughts on whats wrong? car ran 8.10 with just lid, k&n, longtubes, off road y, and exhaust.
12 bolt, full suspension, 3.73 gear. 15 inch skinnies, and 275/50 drag radials. .224/.230 cam, fast 102 intake and throttle body. Upgraded fuel pump. Long tube headers, off road y pipe, flowmaster catback. aftermarket lid with k&n. ABS deleted.
Car is a base model. Hardtop, manual locks and windows. No idea at the weight.
Made 384rwhp thru the stalled auto and 12 bolt.
Only ran 7.90@87 mph with a 1.70 60 foot. The mph shows that the car did NOT spin.
There are cars with my same mods running anywhere from 7.20 to 7.50. I am way off.
performance shop owner has offered to go to track tomorrow and see if he can find any problems.
thoughts on whats wrong? car ran 8.10 with just lid, k&n, longtubes, off road y, and exhaust.
06-23-2011, 09:18 AM
#3
What is the DA at the track calculated based on weather and altitude?
I agree your car appears lazy but DA can have a huge impact. I lost .3 going from 1800DA to 2600DA.
I would really hope to see a car like yours run 90-91mph in the 1/8th even in less than great air though. How much does it weigh? Don't guess...weigh it as you race it including yourself.
Does it feel lazy on the top end? What off road y pipe? Some are MUCH better than others. The flowmaster is also costing you power, get a cutout or ditch it for something that flows better.
How is your tune?
I agree your car appears lazy but DA can have a huge impact. I lost .3 going from 1800DA to 2600DA.
I would really hope to see a car like yours run 90-91mph in the 1/8th even in less than great air though. How much does it weigh? Don't guess...weigh it as you race it including yourself.
Does it feel lazy on the top end? What off road y pipe? Some are MUCH better than others. The flowmaster is also costing you power, get a cutout or ditch it for something that flows better.
How is your tune?
06-23-2011, 06:04 PM
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Get rid of the converter and get a yank SS 4000. I had an a4 with a precision 3800 stall multi disk w/ manual lock up switch and ran similar to you. Was not impressed with the car. I swapped the converter at a last ditch effort to fix the poor performance and knocked out almost .2 60ft, .5 in the 1/4 mile and gained 3 mph through the traps. Toss the purple peice of ****.
06-23-2011, 10:50 PM
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havent weighed the car. Ran the car again tonight and the shop owner came and ran it. He is probably 70-80 lbs lighter than me, and it performed worse with him. He ran two passes identical. 8.14@85 mph with a 1.70 60 foot. Dont know the DA but it was less than 80 degrees out, and the weather was a lot better than when I ran it for the above times. I did run it before he got there and I ran 7.89@86mph with a much better 1.61 60 foot.
Car is tuned, thats how it made 384rwhp. Dyno tune. Shop owner said the car feels very lazy, like a car without any timing and it seemed to be struggling to run. Said it doesnt even rev free and easy like it should. The car DID run a lot better the day i picked it up from the shop. Felt great on street and would plant you in the seat. Now, it just feels dead.
I left it at their shop to be put back on the dyno and looked over. He said it could be a bad knock sensor or something and it could be pulling timing out of the car???
I hope and pray they find the problem or I just wasted a lot of money haha.
Car is tuned, thats how it made 384rwhp. Dyno tune. Shop owner said the car feels very lazy, like a car without any timing and it seemed to be struggling to run. Said it doesnt even rev free and easy like it should. The car DID run a lot better the day i picked it up from the shop. Felt great on street and would plant you in the seat. Now, it just feels dead.
I left it at their shop to be put back on the dyno and looked over. He said it could be a bad knock sensor or something and it could be pulling timing out of the car???
I hope and pray they find the problem or I just wasted a lot of money haha.
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06-23-2011, 10:59 PM
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oh yeah. the headers and y pipe are pacesetter. I know the flowmaster is junk, and i havent weighed the car.
But, I am off a good 5-6 mph and theres gotta be an explanation.
edit: the guy I got it from had it weighed. The car weighed 3350 when I bought it with stock 16 in wheels. I weigh 260, the car now has the 12 bolt which is heavier, but it also now has ABS delete, and it also now has 15in streetlie wheels so that should counter the weight of the 12 bolt. So lets ASSUME the car weighs with me in it:
3610 to 3650. Cant be off by much. the car is a 1SC car
But, I am off a good 5-6 mph and theres gotta be an explanation.
edit: the guy I got it from had it weighed. The car weighed 3350 when I bought it with stock 16 in wheels. I weigh 260, the car now has the 12 bolt which is heavier, but it also now has ABS delete, and it also now has 15in streetlie wheels so that should counter the weight of the 12 bolt. So lets ASSUME the car weighs with me in it:
3610 to 3650. Cant be off by much. the car is a 1SC car
Last edited by silver50; 06-23-2011 at 11:08 PM.
06-24-2011, 05:08 PM
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hopefully the tuner comes up with a solution and I will post his findings.
The car no longer has a MAF. It is speed density. Said they do away with the MAF and tune it speed density when you have the larger intake like that fast. The MAF becomes a restriction.
The car no longer has a MAF. It is speed density. Said they do away with the MAF and tune it speed density when you have the larger intake like that fast. The MAF becomes a restriction.
06-25-2011, 12:25 AM
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havent weighed the car. Ran the car again tonight and the shop owner came and ran it. He is probably 70-80 lbs lighter than me, and it performed worse with him. He ran two passes identical. 8.14@85 mph with a 1.70 60 foot. Dont know the DA but it was less than 80 degrees out, and the weather was a lot better than when I ran it for the above times. I did run it before he got there and I ran 7.89@86mph with a much better 1.61 60 foot.
Car is tuned, thats how it made 384rwhp. Dyno tune. Shop owner said the car feels very lazy, like a car without any timing and it seemed to be struggling to run. Said it doesnt even rev free and easy like it should. The car DID run a lot better the day i picked it up from the shop. Felt great on street and would plant you in the seat. Now, it just feels dead.
I left it at their shop to be put back on the dyno and looked over. He said it could be a bad knock sensor or something and it could be pulling timing out of the car???
I hope and pray they find the problem or I just wasted a lot of money haha.
Car is tuned, thats how it made 384rwhp. Dyno tune. Shop owner said the car feels very lazy, like a car without any timing and it seemed to be struggling to run. Said it doesnt even rev free and easy like it should. The car DID run a lot better the day i picked it up from the shop. Felt great on street and would plant you in the seat. Now, it just feels dead.
I left it at their shop to be put back on the dyno and looked over. He said it could be a bad knock sensor or something and it could be pulling timing out of the car???
I hope and pray they find the problem or I just wasted a lot of money haha.
06-25-2011, 07:54 AM
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Nothing different than last time. I was at a different track. It was a good 12 degrees cooler. Same burnout. Same tire pressure. I had 1.61 and 1.65. Other driver was 1.70 and the 330 was way off like it just quit pulling. The tuner couldn't make it to the track to log the runs. He is though gonna drive it around and log it.
06-27-2011, 05:10 PM
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got word today on what the tuner found. 3 things wrong.
It had somehow come to bet set on "low octane mode" whatever that even means.
It was picking up false knock and pulling timing out.
And he didnt elaborate on the third. Car is fixed now and they say it runs really well.
But he left it back at the performance shop because somethings wrong with rearend. I knew it made too much noise.
I will update on further ETs when we go back to track
It had somehow come to bet set on "low octane mode" whatever that even means.
It was picking up false knock and pulling timing out.
And he didnt elaborate on the third. Car is fixed now and they say it runs really well.
But he left it back at the performance shop because somethings wrong with rearend. I knew it made too much noise.
I will update on further ETs when we go back to track
06-27-2011, 07:50 PM
#15
853 heads, 90k miles. stock everything. i think people look for a scapegoat in their poorly set up car and fall on the flowmaster or their NON flowmaster y merge.
i'd guess the tune is the culprit as it is 99% of the time.
06-29-2011, 10:13 AM
#19
everyone says that **** about ypipes and the flowmaster. i don't buy it at all. if that is the case, how does a stock 99 car with a lid and weld in flowmaster 80 series ONLY trap 88 in the 1/8 @ 2300' da? full weight + a couple pair of womens' shoes and outfits..don't ask.
853 heads, 90k miles. stock everything. i think people look for a scapegoat in their poorly set up car and fall on the flowmaster or their NON flowmaster y merge.
i'd guess the tune is the culprit as it is 99% of the time.
853 heads, 90k miles. stock everything. i think people look for a scapegoat in their poorly set up car and fall on the flowmaster or their NON flowmaster y merge.
i'd guess the tune is the culprit as it is 99% of the time.
Some cars are really picky about exhaust flow...my car picked up by removing the tails. It now loses less than .5 mph in the 1/4 mile running capped instead of open cutouts.