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Old 10-13-2011, 10:29 PM   #51
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Quote:
Originally Posted by Squintz Palladoris View Post
You don't really want the car to squat. If it squats when the weight is transferred then most of the weight (and energy from the transfer) goes to the rear suspension and not the tires. Yes the weight ends up transferred to the rear tires but the energy from the transfer is lost and the tire looses traction if it does not recieve the right amount of energy fast enough.
With less squat more of the weight transfer goes to the tires with less being absorbed by the suspension.

Also, the kinetic energy from a heavy flywheel and a hard hitting clutch will make things alot harder on traction. If and when the traction comes up then those 2 will play a factor in finding the weak link in the drivetrain.

I'm not a rocket scientologist so if I am way off base here, please, someone correct me.
my driveline is about as solid as it can be,,, i have powered thru more then 1 wheelhop...with the twin disc clutch, 9inch and chromoly dshaft it def can take some abuse..but i would think withe the weight shift transfer that might put more pressure to the tires...there must be a dozen ways to look at this...all i know th at i should be able to hook some heated up 17psi dr,s on a prepped track with more then 1100 launch...finding the best way seems to be difficult...have seen stock height cars have better luck, so it could be the height factor,..but 15-20 runs on these settings have not yielded much positive results..someone asked earlier, running the xa coilovers
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Old 10-13-2011, 10:35 PM   #52
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With less squat more of the weight transfer goes to the tires with less being absorbed by the suspension.

i understand what you are saying, but i think if you don,t get the weight transfer due to the stiffness of the suspension, there will be no weight shift or very little, even though the front are near zero...the car dropped with such stiffness set in dampening , i believe really limits weight transfer..
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Old 10-13-2011, 10:37 PM   #53
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ran this weekend with some guys with hoosiers on stock suspension...now i believe the hoosiers def help, but my car launching looks like it is sitting still...i want to look like this...and jamie did run on 18inch drs and still looked very similar on launch
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Old 10-13-2011, 10:47 PM   #54
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my driveline is about as solid as it can be,,, i have powered thru more then 1 wheelhop...with the twin disc clutch, 9inch and chromoly dshaft it def can take some abuse..but i would think withe the weight shift transfer that might put more pressure to the tires...there must be a dozen ways to look at this...all i know th at i should be able to hook some heated up 17psi dr,s on a prepped track with more then 1100 launch...finding the best way seems to be difficult...have seen stock height cars have better luck, so it could be the height factor,..but 15-20 runs on these settings have not yielded much positive results..someone asked earlier, running the xa coilovers

I know you have a good drivetrain wasn't saying that you didn't. DR's on a 4000lb IRS car + High HP and Torque x Instant power from a dual disc non adjustable clutch = a hard combo to get working on the drag strip. I think the best thing you can do will be to get on a bias ply slick. I do think bringing the ride height up will help you out. But trying to make the car squat will take you in the wrong direction. BTW wheel hop can hurt a "Bullet Proof" drivetrain so if you feel it I would advise to let out.
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Old 10-13-2011, 10:49 PM   #55
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ran this weekend with some guys with hoosiers on stock suspension...now i believe the hoosiers def help, but my car launching looks like it is sitting still...i want to look like this...and jamie did run on 18inch drs and still looked very similar on launch
What trans is in the car in this picture? Do you have a pic of the same car sitting still?

*Edit*
Is this the same car?

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Old 10-13-2011, 11:29 PM   #56
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pardon me if this has been said already,

What do you have done to the rear suspension?
What rate rear coils are installed if they are Pedders Coilovers?
Do you have the Pedders rear bolt kit installed?
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Old 10-13-2011, 11:34 PM   #57
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What rate rear coils are installed if they are Pedders Coilovers?
What different rate springs do you offer for the XA's?
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Old 10-13-2011, 11:53 PM   #58
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not 100% sure on that, i need to check with Pete
but i want to verify what he's running.
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Old 10-14-2011, 07:48 AM   #59
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pardon me if this has been said already,

What do you have done to the rear suspension?
What rate rear coils are installed if they are Pedders Coilovers?
Do you have the Pedders rear bolt kit installed?
pedders xa coilovers, not aware of different coils on them, diff bushings,trl arms,, whatever comes with the pedders race package ...is on car ..alignment kits.. as for the other car , i do not believe that is jamie,s, but his sits similar...and tranny is a6 with fully stock drivetrain and susp,other then dshaft and converter...running 10.19
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Old 10-14-2011, 08:20 AM   #60
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pedders xa coilovers, not aware of different coils on them, diff bushings,trl arms,, whatever comes with the pedders race package ...is on car ..alignment kits.. as for the other car , i do not believe that is jamie,s, but his sits similar...and tranny is a6 with fully stock drivetrain and susp,other then dshaft and converter...running 10.19
I just wanted to show you the difference in the gap between the tire and rear fender when the car is launching vs sitting still. Its really not squatting as much as it seems. Also unless he has a trans-brake in the car, you are shocking the tires alot harder.

I just picked up a set of the rear camber bolts for my car too allow more adjustment and get to 0 camber at ride height (mine is sitting about the same stance yours is in your sig pic. I am building my own lower control arms and will probably not be done with them untill next weekend so I hav'nt installed the camber bolts yet. The control arms themselves are adjustable too

Not patronising at all here when I say this. The shock settings I used at the drag strip were 3 front and 20 rear. Front turned all the waycounter clockwise (Full Soft) and then clockwise 3 clicks. Rear is 20 clicks clockwise from full soft.
I only mention that because the adjustment dials have no numbers on them and I have seen others count full hard as zero and it has never been mentioned in this thread.
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Old 10-14-2011, 08:25 AM   #61
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not 100% sure on that, i need to check with Pete
but i want to verify what he's running.
Please update us when you find out. That way we know what other tools we have with these shocks other than ride height and damping.

I know that LPE is running your super car coilovers (Double adjustable) on their Black car with a drag specific spring. Will those springs work on the smaller diameter bodied XA shocks?

On the single adjustable version are we adjusting the compression or rebound of the shock?
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Old 10-18-2011, 09:14 AM   #62
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Find out anything yet?
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Old 10-19-2011, 09:45 PM   #63
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8, 9, 10, 12kg are all springs that can be ordered for the rear
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Old 10-19-2011, 09:58 PM   #64
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Quote:
Originally Posted by Squintz Palladoris View Post
Please update us when you find out. That way we know what other tools we have with these shocks other than ride height and damping.

I know that LPE is running your super car coilovers (Double adjustable) on their Black car with a drag specific spring. Will those springs work on the smaller diameter bodied XA shocks?

On the single adjustable version are we adjusting the compression or rebound of the shock?
Not only is LPE running Pedders, they took off brand-x to break into the 8s The LPE Black Pig is running Supercar coilovers. We started with 10kg rear coils, went to 9kg and she squatted too hard and too fast. We moved to 12kg and that proved the the best combination.

Rear ride height is not that critical. rear camber setting are. The rear wheels should be at 0 camber or on the positive side. This squares the tires up to the track. bringing the front up maybe a touch higher than OE helps on launch. Keeping the front up and the rear down is key for the 1 /2 shift. That is where the independent bound and rebound of the Supercars come into play.

Keeping the IRS assembly steady with appropriate bushes become more important with every extra RW pony. A super strong rear sway bar helps to distribute load. Removing the front sway bar helps with transfer. An option would be to disconnect one endlink and carefully secure it is almost as effective. Lighter rate front coils are a plus as well.

Did I miss anything?
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Old 10-19-2011, 10:00 PM   #65
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I did miss something. All the optional rear coils mentioned are in stock as are all the Pedders 5th Gen products.
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Old 10-19-2011, 10:05 PM   #66
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Not only is LPE running Pedders, they took off brand-x to break into the 8s The LPE Black Pig is running Supercar coilovers. We started with 10kg rear coils, went to 9kg and she squatted too hard and too fast. We moved to 12kg and that proved the the best combination.

Rear ride height is not that critical. rear camber setting are. The rear wheels should be at 0 camber or on the positive side. This squares the tires up to the track. bringing the front up maybe a touch higher than OE helps on launch. Keeping the front up and the rear down is key for the 1 /2 shift. That is where the independent bound and rebound of the Supercars come into play.

Keeping the IRS assembly steady with appropriate bushes become more important with every extra RW pony. A super strong rear sway bar helps to distribute load. Removing the front sway bar helps with transfer. An option would be to disconnect one endlink and carefully secure it is almost as effective. Lighter rate front coils are a plus as well.

Did I miss anything?
I think you covered most of it . What rear spring comes with the XA's?

Do you offer a lighter rate coil for the front?

I assume we are adjusting the compression (Bound) on the Single Adjustable XA's. Would this be correct?

Thanks Pete!
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Old 10-19-2011, 10:27 PM   #67
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Originally Posted by Squintz Palladoris View Post
I think you covered most of it . What rear spring comes with the XA's?

Do you offer a lighter rate coil for the front?

I assume we are adjusting the compression (Bound) on the Single Adjustable XA's. Would this be correct?

Thanks Pete!
8 front and 10 rear are in the box.


We stock the rears, because they are a special wind. In the front, for drag specific use a 4kg 200mm coil would be very good. I don't have any 4kg 62mm 200mm coilos on the shelf at the moment. I wonder why The 4kg front coil is abysmal on the street. They pound like there is no spring installed over the slightest bump, but they work on the strip.

The Xa is a fixed ratio adjustment. When you adjust to hard both the bound and rebound increase and with soft they both decrease. The fixed ratio allows anyone to be a 'suspension expert'. With independent bound and rebound you have to pay much closer attention to the adjustment.

If I got any of this wrong, blame info@PeddersUSA.com
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Old 10-19-2011, 10:37 PM   #68
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8 front and 10 rear are in the box.


We stock the rears, because they are a special wind. In the front, for drag specific use a 4kg 200mm coil would be very good. I don't have any 4kg 62mm 200mm coilos on the shelf at the moment. I wonder why The 4kg front coil is abysmal on the street. They pound like there is no spring installed over the slightest bump, but they work on the strip.

The Xa is a fixed ratio adjustment. When you adjust to hard both the bound and rebound increase and with soft they both decrease. The fixed ratio allows anyone to be a 'suspension expert'. With independent bound and rebound you have to pay much closer attention to the adjustment.

If I got any of this wrong, blame info@PeddersUSA.com
Thanks again Pete!

Will a 2.5" coil from another manufacturer fit on the front? Or are the springs proprietary for the front as well?

Will the same spring preload provide the same ride height with a different rate spring without changing the length of the shock body? Or will ride height have to be readjusted with the different spring rates?

Sorry for all the questions. You keep answering them and it makes me come up with more lol.

Brad
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Old 10-19-2011, 10:45 PM   #69
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Originally Posted by Squintz Palladoris View Post
Thanks again Pete!

Will a 2.5" coil from another manufacturer fit on the front? Or are the springs proprietary for the front as well?

Will the same spring preload provide the same ride height with a different rate spring without changing the length of the shock body? Or will ride height have to be readjusted with the different spring rates?

Sorry for all the questions. You keep answering them and it makes me come up with more lol.

Brad
Yes, any 62mm ID 180mm tall coil will fit the front. When you get down into a 4kg coil the ride height will change. It is half the normal coil rate. The standard coil is 180 mm so a replacement coil should be the same, unless we really drop down in rate for drag specific use.

If you went from the standard 8kg coil to a 7kg or a 9 kg same length coil no height adjustment would be required. There would be a slight difference in ride height, but we would be splitting hairs.
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Old 10-19-2011, 10:54 PM   #70
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Great info thanks Pete!
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Old 10-19-2011, 10:56 PM   #71
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thanks Pete.
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Old 10-20-2011, 12:14 AM   #72
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I'm running xA's and I've loved street driving at 19 front, 12 rear.

Maybe I'm running them backwards, but this gives me stock riding comfort and the rear end squats just enough when punching it from a roll.
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Old 10-20-2011, 12:49 AM   #73
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I'm running xA's and I've loved street driving at 19 front, 12 rear.

Maybe I'm running them backwards, but this gives me stock riding comfort and the rear end squats just enough when punching it from a roll.
Just make sure when you punch it that it's not a donkey punch, that could get ugly.
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Old 10-24-2011, 10:22 PM   #74
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Could I donkey punch it if the rear gets jacked up to 20?
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Old 10-24-2011, 10:25 PM   #75
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Could I donkey punch it if the rear gets jacked up to 20?
Ok by me and the Pedders coilovers, but there may be a few driveline parts that get bent out of shape about it
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