How important is RAKE?
04-07-2008, 07:55 AM
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How important is RAKE? I know we all want to squat in the back and lift in the front, but do you guys set your drag setups to have at least some RAKE?
How does this affect performance/ET?
If your rear tires are much taller than your front tires, do you adjust the suspension to even out the rake and create a level suspension for drag racing?
Thanks
How does this affect performance/ET?
If your rear tires are much taller than your front tires, do you adjust the suspension to even out the rake and create a level suspension for drag racing?
Thanks
04-07-2008, 08:57 AM
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I could be mistaken, but I didn't think we wanted squat, I thought we wanted forward motion. I understand the rearend planting itself to be wasted energy. Slight lift in the front yes.
04-07-2008, 12:32 PM
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Stock springs, moser 9", and a 28"tire makes the rear of my car sit up high, giving me a raked appearance. I can't hook for crap though so I'm in the process of changing up my suspension setup.
04-07-2008, 12:35 PM
#5
It could be the brackets on the rear, the way they were positioned causing the back to sit up higher, I ahve seen this on a couple cars. Try removing the spring isloaters off the rear springs, just put a piece of radiator hose (small dia, about 3/4 I think) over the spring to act as the isolater and that will lower the back about 5/8 to 3/4 of an inch.
04-07-2008, 12:55 PM
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That's exactly what I'm gonna do this week to lower the rear. I'll be happy with just a half an inch anwyay. I have all BMR non adjustable parts too so I'm gonna switch them out for adjustable ones and see if I can get it to hook a little better. It's been a few years already and the more and more I look at my rearend, it looks a little out of wack. I guess I should have concentrated on this a long time ago, lol.
04-07-2008, 01:10 PM
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im kinda in the same boat. with 28's on the back and qa1's on the front i have too much rake. i measured today and I have something like 27" fender height in the front and abut 30" in the rear. I didnt want to take out the spring isolators, but rather adjust the front up some.
what measurements do you guys have to the fenders that run 28's?
what measurements do you guys have to the fenders that run 28's?
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04-07-2008, 05:24 PM
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It's just difference between the driveshaft centerline and pinion centerline which don't change as long as the rear suspension is static between measurements... Since the engine and tranny are static within the chassis, they share the same effects on plane as the pinion and DS and remain constant through out the front suspension travel. Given there was no movement in the rear suspension, drivetrain, chassis, etc... A car sitting on flat ground would have the same pinion angle as the same car on the bumper.
Last edited by crashinaz; 04-07-2008 at 05:37 PM.
04-07-2008, 05:29 PM
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yea, the chassis just goes higher and the engine and driveshaft relation stays the same. i just got back from raising mine back up 3/4" and all around i think it's a little better. at least im not scraping like i used to be
04-07-2008, 05:54 PM
#15
It's just difference between the driveshaft centerline and pinion centerline which don't change as long as the rear suspension is static between measurements... Since the engine and tranny are static within the chassis, they share the same effects on plane as the pinion and DS and remain constant through out the front suspension travel. Given there was no movement in the rear suspension, drivetrain, chassis, etc... A car sitting on flat ground would have the same pinion angle as the same car on the bumper.
04-07-2008, 07:38 PM
#16
im kinda in the same boat. with 28's on the back and qa1's on the front i have too much rake. i measured today and I have something like 27" fender height in the front and abut 30" in the rear. I didnt want to take out the spring isolators, but rather adjust the front up some.
what measurements do you guys have to the fenders that run 28's?
what measurements do you guys have to the fenders that run 28's?
