65 Bump Steer

All the stuff under the car, Transmission, Brakes, Suspension & Steering
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comethead
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65 Bump Steer

Post by comethead »

I drove the Comet a couple hundred miles last weekend. I noticed on big gradual dips it bump steers quite a bit. It’s predictable but still unnerving if you’re not ready for it.
It has all stock suspension and steering except for roller spring perches.
Can this be corrected with an alignment? I’m thinking of adding adjustable strut rods and a vario camber kit to make a home alignment easier (like my 64 track Falcon).
With adjustable strut rods would I need heim jointed LCAs?
Thanks all!

Joe
Last edited by comethead on Fri Mar 12, 2021 12:28 am, edited 1 time in total.
1965 Caliente HT- 289/4 speed
1964 Falcon HT- track car- 302/4 speed
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comethead
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Re: 65 Bump Steer

Post by comethead »

1965 Caliente HT- 289/4 speed
1964 Falcon HT- track car- 302/4 speed
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comethead
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Re: 65 Bump Steer

Post by comethead »

Also, I have these https://www.rosehillperformanceparts.co ... 7rods.html on my track Falcon. A good alternative to the Opentracker ones above.

Joe
1965 Caliente HT- 289/4 speed
1964 Falcon HT- track car- 302/4 speed
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poboyjo65
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Re: 65 Bump Steer

Post by poboyjo65 »

Sounds like a plan. do you still have the vario centric kit on the shelf, is that camber plates?? easier on the alignman! ,always a good thing

Hows your uca's ? balljoints?

do the shelby drop? while it's apart?
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Johno

comethead
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Re: 65 Bump Steer

Post by comethead »

poboyjo65 wrote:
Thu Mar 11, 2021 11:07 pm
Sounds like a plan. do you still have the vario centric kit on the shelf, is that camber plates?? easier on the alignman! ,always a good thing

Hows your uca's ? balljoints?

do the shelby drop? while it's apart?
Yeah that’s exactly what I’m thinking Johnnie. I still have that vario kit I didn’t use on the Falcon and your Shelby drop template. Building that Falcon kinda opened my mind to modding the Comet :lol:
I’m also thinking of adding a Baer Racing bump steer kit. I get zero bump steer on the Falcon with those tie rod ends.

I kind of misstated what the problem is. I was on a highway with about 10 miles of roller coaster like whoopty do’s (I think that’s what they’re called). At the peak of each one the steering wheel would crank to the right. A quick correction to the left kept me straight but at 70mph with oncoming traffic going 70...not fun. So like the opposite of bump steer. :roll:

Joe
1965 Caliente HT- 289/4 speed
1964 Falcon HT- track car- 302/4 speed
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SASSY
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Re: 65 Bump Steer

Post by SASSY »

Think I'd spend time inspecting everything.
As I remember your car is quite high in the front maybe cresting those little rises takes the suspension beyond
a limit of something, causing binding of a part?
Maybe a worn part is showing under that stretch,,,?
Just ideas.
Fred
Last edited by SASSY on Fri Mar 12, 2021 11:50 pm, edited 1 time in total.
I'd rather do it myself if it's done right or not,,,isn't that what hotrodding is all about

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Joe Travers
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Re: 65 Bump Steer

Post by Joe Travers »

comethead wrote:
Fri Mar 12, 2021 12:25 am
I kind of misstated what the problem is. I was on a highway with about 10 miles of roller coaster like whoopty do’s (I think that’s what they’re called). At the peak of each one the steering wheel would crank to the right. A quick correction to the left kept me straight but at 70mph with oncoming traffic going 70...not fun. So like the opposite of bump steer. :roll:
There was a long stretch like that we used to take when we were kiddos because it was a pretty wild ride. If the crest of the road is short, I'm betting you are getting this just after you top the crest? We were playing roller-coaster in my first car, a '62 Galaxie. At higher speeds, the old suspensions unload and load suddenly. It's a trip and loads of fun :wink: Used to drive my Mom nuts. :P

JT
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1963 1/2 Custom Hardtop
342 stroker, solid roller, T-10, 3.55 posi

comethead
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Re: 65 Bump Steer

Post by comethead »

Haha! Yeah that’s when it happened just after the crest...my boy didn’t mind he was having a blast! :lol:

Hey Fred my front suspension is pretty new. About 10k miles since the rebuild. I think the KYB GR2 shocks don’t help. They’re pretty mushy. Maybe allowing too much travel at the top.

Either way I’m gonna tear it apart and make it better... someday. I could lower it like Sassy? Nah :lol:

Joe
1965 Caliente HT- 289/4 speed
1964 Falcon HT- track car- 302/4 speed
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poboyjo65
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Re: 65 Bump Steer

Post by poboyjo65 »

had those shocks on mine & they actually rode better than these kyb gas a justs that I have now but when i went thru the gears at wot & let off & it was all mushy floating around with that uncertain feeling until it was slowed back down quite a bit.
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Johno

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SASSY
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Re: 65 Bump Steer

Post by SASSY »

comethead wrote:
Fri Mar 12, 2021 7:43 pm
I could lower it like Sassy? Nah :lol:

Joe
Ya,
Its a long way down.
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I'd rather do it myself if it's done right or not,,,isn't that what hotrodding is all about

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Joe Travers
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Re: 65 Bump Steer

Post by Joe Travers »

poboyjo65 wrote:
Fri Mar 12, 2021 9:22 pm
had those shocks on mine & they actually rode better than these kyb gas a justs that I have now but when i went thru the gears at wot & let off & it was all mushy floating around with that uncertain feeling until it was slowed back down quite a bit.
My car does the same shifting at high speeds, not WOT. Front dips when you lift and shift. Pulls up hard under acceleration.
WOT gets too crazy for me. Tried it once on a 1>2 shift where the road banked, all I needed to know. :D

JT
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1963 1/2 Custom Hardtop
342 stroker, solid roller, T-10, 3.55 posi

comethead
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Re: 65 Bump Steer

Post by comethead »

poboyjo65 wrote:
Fri Mar 12, 2021 9:22 pm
had those shocks on mine & they actually rode better than these kyb gas a justs that I have now but when i went thru the gears at wot & let off & it was all mushy floating around with that uncertain feeling until it was slowed back down quite a bit.
That’s exactly what I feel at times. Maybe time for stiffer shocks.
1965 Caliente HT- 289/4 speed
1964 Falcon HT- track car- 302/4 speed
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comethead
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Joined: Sun Nov 09, 2003 7:44 pm
Location: Palmdale, CA

Re: 65 Bump Steer

Post by comethead »

SASSY wrote:
Fri Mar 12, 2021 10:26 pm
comethead wrote:
Fri Mar 12, 2021 7:43 pm
I could lower it like Sassy? Nah :lol:

Joe
Ya,
Its a long way down.
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Dang Fred how do you keep a straight oil pan in that machine!!?? :shock:
1965 Caliente HT- 289/4 speed
1964 Falcon HT- track car- 302/4 speed
Image

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Joe Travers
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Re: 65 Bump Steer

Post by Joe Travers »

Here ya go, Fred. This is right up your alley-
https://www.youtube.com/watch?v=qEtDh8V ... d%26Racing

JT
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1963 1/2 Custom Hardtop
342 stroker, solid roller, T-10, 3.55 posi

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SASSY
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Re: 65 Bump Steer

Post by SASSY »

Joe Travers wrote:
Fri Mar 12, 2021 11:14 pm
Here ya go, Fred. This is right up your alley-
https://www.youtube.com/watch?v=qEtDh8V ... d%26Racing

JT
yes have watched it, there is Ausi stuff with a 64 too.
Circle Tracked this in the early 80s. Held the track record till
thry gave the camaros more rubber!
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comethead wrote:
Fri Mar 12, 2021 10:50 pm
SASSY wrote:
Fri Mar 12, 2021 10:26 pm
comethead wrote:
Fri Mar 12, 2021 7:43 pm
I could lower it like Sassy? Nah :lol:

Joe
Ya,
Its a long way down.
Image
Dang Fred how do you keep a straight oil pan in that machine!!?? :shock:
Motor went up, different pan. The anti roll bar hits the ground then the headers before the pan.
Image
I'd rather do it myself if it's done right or not,,,isn't that what hotrodding is all about

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