...

Go Back   Lateral-g Forums > Technical Discussions > Chassis and Suspension
User Name
Password



Reply
 
Thread Tools Display Modes
  #1  
Old 03-15-2008, 10:51 PM
PT Goat's Avatar
PT Goat PT Goat is offline
Member
 
Join Date: Jan 2008
Location: Southern NJ
Posts: 35
Thanks: 0
Thanked 0 Times in 0 Posts
Default I wanted it low, but this is ridiculous.

Finally got my GTO on the ground and it's just too damn low up front. So low that I'm wondering if something is wrong. I've got 1.5" of ground clearance at my downpipes (with R/A manifolds, not even headers), and just about 2" at my scattershield. I can't get my low-pro aluminum jack under the frame or even past the front swaybar. That's low! It looks great, but I sure can't drive it this way.

Here's my current front setup: SPC upper and lower arms with Howe tall balljoints on stock spindles. Eibach springs and Hotchkis shocks (as recommended by SC&C). The balljoints lowered the car .75", springs are 1-2", and SPC lowers are 1", for a total advertised drop 2.75-3.75". To offset that, I've got .75" spacers on top of the springs and 1" of spacers in the SPC lowers. So I should only be looking at a 1-2" drop, and it's obviously much, much more. And I don't even have any front sheetmetal installed (no hood, fenders, inners, header panel, grilles, etc).

Right now, my upper control arms are at almost a 25-degree angle, which certainly doesn't look right. It's so low that the front sway bar is laying on the outer tie rods. I've got to do something - considering swapping to BB Hotchkis springs, but I might just reinstall the stock springs.

Thoughts?
__________________
Matt

1965 Pontiac GTO - Paul Spotts 421 (433) w/Tripower, RamAir, 6X Heads / TKO600 / 3.90 Safe-T-Track / Vintage AC / Baer 4-wheel Discs / AGR PS / Hotchkis Bars, Shocks, Springs / SPC & BMR Control Arms / 17&18 Intro Vistas / GY F1GSD3 Redlines / '06 GTO Seats / Comp Audio
Other Rides: '59 Vette / '64 GTO (x2) / '65 GTO / '66 GTO / '66 Vette Roadster / '02 Vette / '07 Avalanche LTZ 6.0L / '08 Suzuki GSX-R750
Reply With Quote
  #2  
Old 03-16-2008, 12:33 AM
Vegas69's Avatar
Vegas69 Vegas69 is offline
Senior Member
 
Join Date: Dec 2006
Posts: 8,692
Thanks: 87
Thanked 215 Times in 120 Posts
Default

Air ride.....if you want it that low, that is your only alternative.
__________________
Todd
Reply With Quote
  #3  
Old 03-16-2008, 08:56 AM
ccracin's Avatar
ccracin ccracin is offline
Senior Member
 
Join Date: Sep 2006
Location: Rostraver, PA
Posts: 2,077
Thanks: 0
Thanked 4 Times in 4 Posts
Default

What is the angle of the lower control arm? It sounds like the springs you have are either too soft or the free height is to short. Are you sure they are the right ones for the control arms you are using. This is one of the pit falls to piecing together a system, sometimes all the advertised numbers don't add up. If SC&C recommended springs, give them a call. Some others on here might correct me, but I like to start from the lower control arm. The line between the center point of rotation in the lower ball joint and the center point of rotation on the inner chassis mount should be level. This gives you very predictable movement in compression and rebound. Then start measuring pieces from there to see where the issue is. Another thing to look at is the shock wipe. Where are you in the shock travel as it is. If it's mostly compressed or the opposite it can tell you something as well. I can't tell you specifically what is wrong because I don't have any experience with these cars, but I'm sure someone will chime in shortly. Good Luck.
__________________
Chad
Instagram - @cctek
https://https://www.facebook.com/CCTek

68 Chevy Pickup Project
Build Thread: https://lateral-g.net/forums/showthread.php4?t=7505

THANKS TO: A&M Machine and Fabrication, CCTek (http://www.candctek.com), Hermance Design(www.hermancedesign.com), Paradise Road Rod & Custom, Harry Opfer Welding, Wegner Automotive Research, Clayton Machine Works
Reply With Quote
  #4  
Old 03-16-2008, 09:08 AM
fesler's Avatar
fesler fesler is offline
Senior Member
 
Join Date: Jan 2007
Location: Scottsdale, AZ
Posts: 2,027
Thanks: 0
Thanked 1 Time in 1 Post
Default



post some pictures so we can see
__________________
Chris Fesler
Fesler Built - Scottsdale, AZ
Reply With Quote
  #5  
Old 03-16-2008, 01:47 PM
PT Goat's Avatar
PT Goat PT Goat is offline
Member
 
Join Date: Jan 2008
Location: Southern NJ
Posts: 35
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Took another look at things today, and took some pics. I think they speak for themselves that there is a problem here. Note the car is that low without any front sheetmetal. And almost 2" of spring spacers.
Attached Images
    
__________________
Matt

1965 Pontiac GTO - Paul Spotts 421 (433) w/Tripower, RamAir, 6X Heads / TKO600 / 3.90 Safe-T-Track / Vintage AC / Baer 4-wheel Discs / AGR PS / Hotchkis Bars, Shocks, Springs / SPC & BMR Control Arms / 17&18 Intro Vistas / GY F1GSD3 Redlines / '06 GTO Seats / Comp Audio
Other Rides: '59 Vette / '64 GTO (x2) / '65 GTO / '66 GTO / '66 Vette Roadster / '02 Vette / '07 Avalanche LTZ 6.0L / '08 Suzuki GSX-R750
Reply With Quote
  #6  
Old 03-16-2008, 01:49 PM
PT Goat's Avatar
PT Goat PT Goat is offline
Member
 
Join Date: Jan 2008
Location: Southern NJ
Posts: 35
Thanks: 0
Thanked 0 Times in 0 Posts
Default

First pic shows distance from my swaybar to the ground - about 3.75" - obviously unacceptable. And that's with almost 2" of spacers on the front springs.

Second pic is of one of my other early GTOs - stock suspension, but also with a 1.25" front bar. That car has 10.5" of ground clearance at the front bar.

How could this front suspension possibly lower the car almost 10" over stock?
Attached Images
  
__________________
Matt

1965 Pontiac GTO - Paul Spotts 421 (433) w/Tripower, RamAir, 6X Heads / TKO600 / 3.90 Safe-T-Track / Vintage AC / Baer 4-wheel Discs / AGR PS / Hotchkis Bars, Shocks, Springs / SPC & BMR Control Arms / 17&18 Intro Vistas / GY F1GSD3 Redlines / '06 GTO Seats / Comp Audio
Other Rides: '59 Vette / '64 GTO (x2) / '65 GTO / '66 GTO / '66 Vette Roadster / '02 Vette / '07 Avalanche LTZ 6.0L / '08 Suzuki GSX-R750
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:54 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright Lateral-g.net