Pontiac GTO Forum banner

1 - 14 of 14 Posts

·
Registered
Joined
·
60 Posts
Discussion Starter #1
My '67 has that boaty feeling, and it's time to go!

What upgrades would be recommended to start out with? There are so many things you can do, just wondering what will make the most difference and where to start. Thanks
 

·
Registered
Joined
·
296 Posts
Most importantly, what's your budget?

You can spend a few hundred or a few thousand on your suspension very easily.

Cheapest way to improve handling is polyurethane bushings all around and boxed or tubular rear control arms. That alone will make a big difference. Tubular front control arms tend to be kinda pricey. Swap out your original front sway bar with a beefier second gen Trans Am sway bar, and if you don't have a rear sway bar, buy one. Your shocks and springs need replaced as well, especially if they're the original ones that came on the car. This is the low to mid budget approach.

If you wanna get serious, buy a complete suspension package from Detroit Speed, Hotchkis, Spohn, or Global West.
 

·
Premium Member
Joined
·
662 Posts
When you say "boaty feeling," are you comparing the ride it to similar vehicles from the era, or the ride of a more modern suspension? Matt
 

·
64-67 Expert
Joined
·
8,561 Posts
Both of my GTO's have stock suspension and are not 'boaty' in the slightest. It's important to have good springs, good shocks, and all components up to snuff with new bushings, etc. , as well as a front end alignment that is spot-on. Bigger sway bars can reduce body roll, and a rear sway bar helps a bunch. Simply installing a bigger front bar, a rear bar, and gas shocks will help a lot. If you want to modify it with aftermarket parts, the sky is the limit. Worn out old suspensions are 'boaty', fresh suspension systems, even with stock parts, really aren't.
 

·
Registered
Joined
·
1,217 Posts
replacing old worn out shocks with new ones would be the first thing and the most noticeable improvement, then tighten up the front end with new bushings, tie rod ends,- all the steering parts that wear out.
Then of course if you want to upgrade skys the limit
 

·
Registered
Joined
·
60 Posts
Discussion Starter #6
I was thinking maybe new shocks and springs. I had forgot about sway bars and will probably do that as well. I think I will start there and see how she rides.
 

·
Premium Member
Joined
·
775 Posts
I was thinking maybe new shocks and springs. I had forgot about sway bars and will probably do that as well. I think I will start there and see how she rides.

Consider coil-over shocks and good front a rear sway bars. My 1967 GTO rides nice and tight with no body roll.
 

·
Registered
Joined
·
44 Posts
Well, I think I've read just about every thread concerning suspension upgrades. But I'm still in the lurch about going with stock rubber ball joints/tie rod ends or polyurethane ball joints/tie rod ends up front. Just can't quantify the impact.

Several have mentioned that the car has a stiffer ride with polyurethane. So how bad is it? And they're noisier - how bad?

A couple have mixed & matched poly and rubber. Any follow up?

I'm looking to eliminate the "floating couch" feeling that some cars had from the day but I'm not racing. Weekend cruises and cruise-ins are the plan. And let's face it, it's a car for the weekend, not a daily driver. It'll never see weather and only get a couple of thousand miles a year on it.

Opinions?

Thanks!
 

·
Super Moderator
Joined
·
5,741 Posts
I've got a lot of Spohn Engineering parts on my 69, and I like the way it drives and handles.
A few tips in my opinion, depending on how much you want to spend:
Freshen up the front - that means ball joints, upper/lower control arm bushings, shocks, tie rod ends, steering link, idler arm, sway bar links --- basically everything that's rubber. I like polyurethane bushings on the front and I don't think my car is harsh or noisy at all (but then it's hard to hear much over the engine :D )
Good shocks are a must.
If you want to spend more/upgrade more, look into good tubular control arms and perhaps even a coilover system - but get ready to spend some money.

At the rear - don't go with urethane bushings unless you're also replacing both upper and lower control arms with some that have fully articulated/spherical joints (in which case those joints will replace the bushings anyway). Reason: the design of those triangulated rear control arms make it so that in order for the rear axle to 'twist' in the car (like when the body rolls in a corner) something in those control arms has to twist. Normally that will be the rubber bushings. if you replace them with hard urethane, something is still going to have to twist and it might be the arms themselves, or the mounts --- and stuff is going to tend to break.
Again, good shocks at the rear are a must and either fresh rubber everywhere, or upgrade to control arms with spherical joints. My opinion is that there really is no middle ground between those two options. You can add a 70-style factory rear sway bar set up if you can find one, but it also requires boxed lower control arms for the mounting bolts. Spohn also makes a rear sway bar that anchors to the frame (as it should) instead of to the control arms. That's what I'm running on my 69.

Another good add on is to install rear control arm mounting point braces to help control that twisting tendency I wrote about above, and also on cars that are carrying some power and can hook.

UMI is good. I'm running their control arm braces. As I mentioned I like Spohn also. Those are the only two companies I have first hand experience with, but I know there are others out there who make good stuff. QA1 comes to mind for their coilover systems and shocks.

The least expensive route is going to be just freshening up everything with factory parts and good shocks. You'll be surprised at how much difference that will make.

Bear
 

·
Banned
Joined
·
1,496 Posts
All I had to do on my '67 was rebuild the entire suspension, Bilstein shocks, larger front sway bar and I went with boxed trailing arms and rear sway bar.
Upgraded to disc brakes in front so it would stop.
When I bought it the car was dangerous to drive, body roll and sawing at the wheel just to stay in my lane.
Now it drives like a go cart, very responsive and easily tracks on corners.
The funny thing is before racking it and doing an assessment I thought the main problem was the steering box but in the end the steering box was the only part I didn't need to replace/rebuild.
The upside of this car is that it was all original, the downside was it was all original.
:)
 

·
Registered
Joined
·
44 Posts
Bear, GoatRoper,
Thanks for the replies. I went with the Hotchkiss integrated set up for the rear (Boxed arms/Springs/Shocks) and sway bars for both front and rear. Have their springs and shocks for the front to match. That's set. Now I have the front end to figure out. I have a disc brake conversion. Just from reading a lot of things online I get the impression that polyurethane is not all it's cracked up to be on a GTO. Hard ride and squeaky. With all the other improvements I already have, some with polyurethane, more polyurethane up front might be making my car to ride like a rock. Sounds like Goat Roper kinda' hit the middle with success.

Shooter
 

·
Registered
Joined
·
3,785 Posts
What/which sway bars did you add? Ive a nice 67 and thinking to add sway bars to tighten ‘er up a bit
The last post on this thread was over a year ago. However, if you do a search in the upper right hand corner, you will find more topics and recommendations on sway bars. They are pretty straight forward. :thumbsup:
 
1 - 14 of 14 Posts
Top