Fishtailing
Thread Starter
Instructor
Joined: Jun 2006
Posts: 241
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From: Missoula Montana
Fishtailing
I put Blackwing CAI and Corsa Indy exhausts on my wife's '04 vert. I got it dyno tuned and gained 34 rwhp and 30lb torque. Now, when she punches it at low speeds the rear end fishtails a lot, when going straight ahead. Any suggestions as to the cause or to correct the fishtailing? The max power on the dyno sheet was 314hp. That doesn't seem like that much HP to cause the car to that.
Drifting
Joined: Oct 2004
Posts: 1,975
Likes: 9
From: "Philly" Pennsylvania
Originally Posted by BLCK PRL
I put Blackwing CAI and Corsa Indy exhausts on my wife's '04 vert. I got it dyno tuned and gained 34 rwhp and 30lb torque. Now, when she punches it at low speeds the rear end fishtails a lot, when going straight ahead. Any suggestions as to the cause or to correct the fishtailing? The max power on the dyno sheet was 314hp. That doesn't seem like that much HP to cause the car to that.
Burning Brakes
Joined: Nov 2004
Posts: 1,028
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From: Fort Worth Texas
Fishtailing when you punch it is not really a "problem". It usually means that the tires are spinning. This is a good thing! If you perceive it as a problem, then you have to learn how to drive it differently after the mods...i.e., don't punch it so hard so it doesn't fishtail!
Instructor
Joined: Aug 2006
Posts: 103
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From: Sacramento Ca
Lmao!
Originally Posted by debmwb
Fishtailing when you punch it is not really a "problem". It usually means that the tires are spinning. This is a good thing! If you perceive it as a problem, then you have to learn how to drive it differently after the mods...i.e., don't punch it so hard so it doesn't fishtail!
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Thread Starter
Instructor
Joined: Jun 2006
Posts: 241
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From: Missoula Montana
Yes...Active Handling is ON and yes it's an A-4 automatic. Deb...I agree and I told her that she just needs to get use to the added power. She use to drag race 40 years ago and even today she drives it like she stole it.
Burning Brakes
Joined: Nov 2004
Posts: 1,028
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From: Fort Worth Texas
Originally Posted by BLCK PRL
Yes...Active Handling is ON and yes it's an A-4 automatic. Deb...I agree and I told her that she just needs to get use to the added power. She use to drag race 40 years ago and even today she drives it like she stole it.
Gotta Love it!
Oh....put that thing into "comp" mode and see what happens!
Burning Brakes
Joined: Sep 2002
Posts: 1,000
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From: Misawa
St. Jude Donor '08
Originally Posted by tsts
Did similar changes like your and have same problem, Is the car automatic (A4). If so, if found if it downshifts two (2) gears to first , all hell breaks loose. If I know I might have to punch it, like when entering fast moving traffic, I try to shift manually so the engine doesn't kick down as hard. this is with TC on.
Manual shifting does help a ton with that one.
Tech Contributor
Joined: Oct 1999
Posts: 40,995
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From: Charlotte, NC (formerly Endicott, NY)
How much extra power do you really have at low speeds? At 10 or 20 mph in low gear what RPMs are you running? If you floor it at those speeds and the car drops to low that is all the RPM you are going to see until the engine accelerates. Your dyno tune and mods added 34 HP at the peak. You can look at your dyno graph to see the delta power for the RPM at lower engine speeds. At lower RPMs like 2000 the difference is probably less than 10 HP. Not a reason to suddenly see some fishtailing. Sounds like different driving.
Bill
Bill
Thread Starter
Instructor
Joined: Jun 2006
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From: Missoula Montana
Originally Posted by Bill Dearborn
How much extra power do you really have at low speeds? At 10 or 20 mph in low gear what RPMs are you running? If you floor it at those speeds and the car drops to low that is all the RPM you are going to see until the engine accelerates. Your dyno tune and mods added 34 HP at the peak. You can look at your dyno graph to see the delta power for the RPM at lower engine speeds. At lower RPMs like 2000 the difference is probably less than 10 HP. Not a reason to suddenly see some fishtailing. Sounds like different driving.
Bill
Bill
