PFADT coilovers
Thread Starter
Late Model Domestics
Joined: Oct 2007
Posts: 1,548
Likes: 46
From: Virginia Beach VA
PFADT coilovers
Installed my PFadt Coilovers and have them threaded all the way down into the cups front and rear.
I need the fronts a 1.5" lower since i have a reverse rake!
Can I thread down the perch or does this effect preload?
PFADT need clearer instructions its so vague!
TIA
I need the fronts a 1.5" lower since i have a reverse rake!
Can I thread down the perch or does this effect preload?
PFADT need clearer instructions its so vague!
TIA
Safety Car
Joined: Dec 2009
Posts: 3,724
Likes: 9
Well, my feeling is that your ride height is going to be pretty slammed in the rear with the bodies threaded all the way into the rear cups. You can get a little more drop out of the fronts by threading the spring perches down, but in the end you my want to raise the rear to even it out. We recommend a ground to top of fender ride height of about 26.5 inches in the front and rear for optimal handling on the C5, if you want to go lower then that you can, but handling may begin to be adversely effected at that point.
Removing spring preload will effect your corner balances a little bit, but the car will sit back on the ground back on the springs when it comes off the lift. Unless you're threading the collar down more than an inch or so the chances of the spring coming loose from the spring perch while the car is on the ground is pretty slim.
Drop the front a little, raise the rear a little... or just run our recommended ride height and you should be fine! Trying to drop the front end another inch and a half with the spring perch is going to run the risk of letting the spring perch come unseated on the street.
Removing spring preload will effect your corner balances a little bit, but the car will sit back on the ground back on the springs when it comes off the lift. Unless you're threading the collar down more than an inch or so the chances of the spring coming loose from the spring perch while the car is on the ground is pretty slim.
Drop the front a little, raise the rear a little... or just run our recommended ride height and you should be fine! Trying to drop the front end another inch and a half with the spring perch is going to run the risk of letting the spring perch come unseated on the street.
Thread Starter
Late Model Domestics
Joined: Oct 2007
Posts: 1,548
Likes: 46
From: Virginia Beach VA
Well, my feeling is that your ride height is going to be pretty slammed in the rear with the bodies threaded all the way into the rear cups. You can get a little more drop out of the fronts by threading the spring perches down, but in the end you my want to raise the rear to even it out. We recommend a ground to top of fender ride height of about 26.5 inches in the front and rear for optimal handling on the C5, if you want to go lower then that you can, but handling may begin to be adversely effected at that point.
Removing spring preload will effect your corner balances a little bit, but the car will sit back on the ground back on the springs when it comes off the lift. Unless you're threading the collar down more than an inch or so the chances of the spring coming loose from the spring perch while the car is on the ground is pretty slim.
Drop the front a little, raise the rear a little... or just run our recommended ride height and you should be fine! Trying to drop the front end another inch and a half with the spring perch is going to run the risk of letting the spring perch come unseated on the street.
Removing spring preload will effect your corner balances a little bit, but the car will sit back on the ground back on the springs when it comes off the lift. Unless you're threading the collar down more than an inch or so the chances of the spring coming loose from the spring perch while the car is on the ground is pretty slim.
Drop the front a little, raise the rear a little... or just run our recommended ride height and you should be fine! Trying to drop the front end another inch and a half with the spring perch is going to run the risk of letting the spring perch come unseated on the street.
Thanks for your help!
Le Mans Master
Joined: May 2006
Posts: 7,877
Likes: 254
From: Hillsboro OR
I set mine to 26.5 both F/R. Looks and rides great! New out of the box, I could get the rears down to 26.5 by nearly bottoming out the adjustment. The fronts required the lower perch be adjusted up ~ 1/2" to get it down to 26.5. FYI, I did the with the blessing of Pfadt.
Safety Car
Joined: Dec 2009
Posts: 3,724
Likes: 9
Hey Mario. Are you running a wheel and tire combination that is over all the same diameter as stock? If your running an oversized tire that may raise the car and skew your ground to fender measurements, which are assuming you're running a tire of stock height. Also, it may be a good idea to send some pictures of your install over to info@pfadtracing.com . Lets take a look at what you've got going on there, maybe there is something we can see.
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Thread Starter
Late Model Domestics
Joined: Oct 2007
Posts: 1,548
Likes: 46
From: Virginia Beach VA
Hey Mario. Are you running a wheel and tire combination that is over all the same diameter as stock? If your running an oversized tire that may raise the car and skew your ground to fender measurements, which are assuming you're running a tire of stock height. Also, it may be a good idea to send some pictures of your install over to info@pfadtracing.com . Lets take a look at what you've got going on there, maybe there is something we can see.
I am running CCW C10's 275 35 18 and 335 30 18 RA1's. No matter what front perch had to move down.
The only problem I'm having now is drilling adjustment holes since I have dynamat in the rear and it wont come up. I now have to remove shocks to drill from bottom, major PITA.
Tech Contributor
Joined: Aug 1999
Posts: 16,376
Likes: 404
From: Should this thoughtful, valuable contribution meet with no acknowledgement or 'thanks' this post----
I appreciate the help had it aligned at race werks and they set my ride height at 26.5 Front and 27.25 rear per my request.
I am running CCW C10's 275 35 18 and 335 30 18 RA1's. No matter what front perch had to move down.
The only problem I'm having now is drilling adjustment holes since I have dynamat in the rear and it wont come up. I now have to remove shocks to drill from bottom, major PITA.
I am running CCW C10's 275 35 18 and 335 30 18 RA1's. No matter what front perch had to move down.
The only problem I'm having now is drilling adjustment holes since I have dynamat in the rear and it wont come up. I now have to remove shocks to drill from bottom, major PITA.
Maybe you just need to drill a small diameter guide hole...just take a guess where the adjustment hole should be, stick a piece of wire through the hole, then go under and look for it. Then go back and drill the adjustment hole relative to the guide hole, which now can be plugged with just about anything.
Le Mans Master
Joined: May 2007
Posts: 5,393
Likes: 17
From: Belleville Mich.
Those holes will be in close proximity of your gas tanks!!!
Pulling out your rear c/overs & drilling upwards through the
center shock base hole, with a long small diameter bit would be the wise thing to do.
Good luck.
Pulling out your rear c/overs & drilling upwards through the
center shock base hole, with a long small diameter bit would be the wise thing to do.
Good luck.
Thread Starter
Late Model Domestics
Joined: Oct 2007
Posts: 1,548
Likes: 46
From: Virginia Beach VA
[/B]
Maybe you just need to drill a small diameter guide hole...just take a guess where the adjustment hole should be, stick a piece of wire through the hole, then go under and look for it. Then go back and drill the adjustment hole relative to the guide hole, which now can be plugged with just about anything.
Maybe you just need to drill a small diameter guide hole...just take a guess where the adjustment hole should be, stick a piece of wire through the hole, then go under and look for it. Then go back and drill the adjustment hole relative to the guide hole, which now can be plugged with just about anything.
Thanks for that advice.
