Weight transfer experts, inside please...
Thread Starter
Race Director
Joined: Oct 2004
Posts: 12,861
Likes: 4,664
Weight transfer experts, inside please...
I am getting conflicting opinions on trying a set of adjustable shocks on my 2000 C5. It has the "magnetic ride" option, which I think is correctly termed the "F-45" suspension. I am reading a lot on the QA1 shocks, but they have the asterisk at the bottom line that usually says "Not for the F-45 suspension cars!!
I think that it must screw up the BCM, and activate the traction control and/or the active handling. I am really needing some extra help as far as the traction is concerned. I have gotten down to a best of 1.88 for the 60' time, but this was only once, with most of them in the 1.95 range being the best it will do the rest of the time. Usually in the 2.0-2.1 range. The car has an A4 w/3200 Yank converter and 315/30/18 Michelin PS2's out back with 3.42 gears. I can break the tires loose most every time at 65mph.
The 1.88 is the only time it has ever broken 1.9 in the 60', and this was only after dropping the pressure down to 23lbs or so, which really puts the hurt on trap speeds. I know there are stickier tires available, but really think that more weight transfer would be just as beneficial, as it seems that the car is too level during hard acceleration. Help!!!! PLEASE!!!!
I think that it must screw up the BCM, and activate the traction control and/or the active handling. I am really needing some extra help as far as the traction is concerned. I have gotten down to a best of 1.88 for the 60' time, but this was only once, with most of them in the 1.95 range being the best it will do the rest of the time. Usually in the 2.0-2.1 range. The car has an A4 w/3200 Yank converter and 315/30/18 Michelin PS2's out back with 3.42 gears. I can break the tires loose most every time at 65mph. The 1.88 is the only time it has ever broken 1.9 in the 60', and this was only after dropping the pressure down to 23lbs or so, which really puts the hurt on trap speeds. I know there are stickier tires available, but really think that more weight transfer would be just as beneficial, as it seems that the car is too level during hard acceleration. Help!!!! PLEASE!!!!
Le Mans Master
Joined: Apr 2000
Posts: 7,218
Likes: 1
From: Cresskill NJ
I would guess they say not for F45 cars because the computer gets upset if it doesn't see the original shocks plugged in. You can get simulators that plug in though and allow you to run any shocks you want without the computer throwing codes.
Chris
Chris
Melting Slicks
Joined: May 2001
Posts: 2,456
Likes: 8
From: Cockeysville Maryland
Cruise-In IV Veteran
Daytona Jam 1 Veteran
A couple of things to try are:
-Put more air in front tires (I use 40 pounds)
-disconnect or remove front sway bar
-set the F45 control to tour
I run the 315/30/18 BFGs and I have them down to about 16 pounds of air.
Hope this helps!
-Put more air in front tires (I use 40 pounds)
-disconnect or remove front sway bar
-set the F45 control to tour
I run the 315/30/18 BFGs and I have them down to about 16 pounds of air.
Hope this helps!
Thread Starter
Race Director
Joined: Oct 2004
Posts: 12,861
Likes: 4,664
Originally Posted by DngrZne
I would guess they say not for F45 cars because the computer gets upset if it doesn't see the original shocks plugged in. You can get simulators that plug in though and allow you to run any shocks you want without the computer throwing codes.
Chris
Chris
Thread Starter
Race Director
Joined: Oct 2004
Posts: 12,861
Likes: 4,664
Originally Posted by AnteVenom
A couple of things to try are:
-Put more air in front tires (I use 40 pounds)
-disconnect or remove front sway bar
-set the F45 control to tour
I run the 315/30/18 BFGs and I have them down to about 16 pounds of air.
Hope this helps!
-Put more air in front tires (I use 40 pounds)
-disconnect or remove front sway bar
-set the F45 control to tour
I run the 315/30/18 BFGs and I have them down to about 16 pounds of air.
Hope this helps!
Melting Slicks
Joined: May 2001
Posts: 2,456
Likes: 8
From: Cockeysville Maryland
Cruise-In IV Veteran
Daytona Jam 1 Veteran
I do run the BFG drag radials, sorry I did not make that clearer.
If you start out at 16pounds and do a decent burnout I am sure the pressure in the tires is greater than 16 for the run? I consistently run in the 116-118 mph range. I think with skinnies up front I could improve my et or even with 17 inch rims.
The et, in my opinion, is affected most by what happens in the first 60 feet. If you get that down your et will come down proportionately.
You need to lower the pressure in your tires in order to get that lower 60 foot, IMHO.
Good luck to you.
If you start out at 16pounds and do a decent burnout I am sure the pressure in the tires is greater than 16 for the run? I consistently run in the 116-118 mph range. I think with skinnies up front I could improve my et or even with 17 inch rims.
The et, in my opinion, is affected most by what happens in the first 60 feet. If you get that down your et will come down proportionately.
You need to lower the pressure in your tires in order to get that lower 60 foot, IMHO.
Good luck to you.
Le Mans Master
Joined: Apr 2000
Posts: 7,218
Likes: 1
From: Cresskill NJ
Originally Posted by grinder11
Do you know where to pick up these sims? I have only seen the O2 sims for the ECM, nothing for the BCM, as yet. Any help would be appreciated. Thanks.
http://www.corvettegarage.com/produc...-corvette.html
Le Mans Master
Joined: Feb 2004
Posts: 8,629
Likes: 16
From: York PA
Originally Posted by DngrZne
I would guess they say not for F45 cars because the computer gets upset if it doesn't see the original shocks plugged in. You can get simulators that plug in though and allow you to run any shocks you want without the computer throwing codes.
Chris
Chris
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski