Results of a heavy spring up front?
Thread Starter
TECH Regular
Joined: Dec 2005
Posts: 437
Likes: 0
From: Northern Kentucky
Results of a heavy spring up front? Sorry, not at all LS1 related but I know plenty of you on here know suspensions.
I have a '67 Camaro I swapped from a 468 to a 548 over the winter. It gained ~250 HP. I pulled 1.28's with the 468 and pulled 1 1.25. Anyway, with the big motor the best I've had is a 1.29. Mostly 1.33's. It's barely picking the front end up and some passes I'll annihilate the tires before it hooks.
I put the QA1 coil-over conversion kit on it this winter instead of cheapy comp engineering shocks. I ordered them from Jegs, the lightest spring they supplied was a 350#. It was suggested for front end weight of 1700 or higher. When we scaled mine I believe it was 760 LF and 720 RF so ~1450 up front. I just looked on QA1's site and it says they have a 250# spring for 1500 pound front end cars.
I've had all kinds of issues hooking up, could this be the main source? I haven't dialed in the front shocks at all. Didn't screw with them much from factory (on the loosest setting) but what launch RPM/rear tuning I've done hasn't helped.
After that long winded explanation, on a big tire/big stall ladder bar car could running too heavy of a spring up front be the main source of my problems? Thanks.
I have a '67 Camaro I swapped from a 468 to a 548 over the winter. It gained ~250 HP. I pulled 1.28's with the 468 and pulled 1 1.25. Anyway, with the big motor the best I've had is a 1.29. Mostly 1.33's. It's barely picking the front end up and some passes I'll annihilate the tires before it hooks.
I put the QA1 coil-over conversion kit on it this winter instead of cheapy comp engineering shocks. I ordered them from Jegs, the lightest spring they supplied was a 350#. It was suggested for front end weight of 1700 or higher. When we scaled mine I believe it was 760 LF and 720 RF so ~1450 up front. I just looked on QA1's site and it says they have a 250# spring for 1500 pound front end cars.
I've had all kinds of issues hooking up, could this be the main source? I haven't dialed in the front shocks at all. Didn't screw with them much from factory (on the loosest setting) but what launch RPM/rear tuning I've done hasn't helped.
After that long winded explanation, on a big tire/big stall ladder bar car could running too heavy of a spring up front be the main source of my problems? Thanks.
I use a 450lbs springs on 1st gen f-body when I do coil overs. Where are the ladderbars at in the rear?
Thread Starter
TECH Regular
Joined: Dec 2005
Posts: 437
Likes: 0
From: Northern Kentucky
The car had cut down BBC racing springs, we put the coil overs on and at their lowest setting the car sits at the exact same ride height.
The ladderbars are in the middle slot. I run 6 1/2 pounds (14X32 Hoosiers), the car hooked fine before we drilled the wheels on a green/cold track. I'm thinking about upping the tire pressure, we've always run it there fine but I think we need to try other options.
EDIT: Since you're the man with these things, what would you recommend for an initial setting on the coil overs? They're set all the way loose now as they were stock, curious as to how much I should tighten them up. I know it's a long shot given the limited info you have. The motor is on alcohol and cranks out about 850 NA.
The ladderbars are in the middle slot. I run 6 1/2 pounds (14X32 Hoosiers), the car hooked fine before we drilled the wheels on a green/cold track. I'm thinking about upping the tire pressure, we've always run it there fine but I think we need to try other options.
EDIT: Since you're the man with these things, what would you recommend for an initial setting on the coil overs? They're set all the way loose now as they were stock, curious as to how much I should tighten them up. I know it's a long shot given the limited info you have. The motor is on alcohol and cranks out about 850 NA.
Last edited by Hrod382; May 29, 2008 at 11:05 PM.
