ride quality - Team Camaro Tech
Wheels & Tires What fits what?

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 20 (permalink) Old Dec 16th, 13, 10:39 AM Thread Starter
Tech Team
bob
 
Join Date: Mar 2011
Location: pa
Posts: 34
ride quality

hello everyone. I am thinking of changing my rear wheels and tires from 315x35x17 tire size to a 255 or 275 x45 x17 to improve the ride quality.I understand this will require narrower rims to accomadate the smaller tire.It will probably cost about $1000 to make the change. With everything else remaining the same on my car,will there be much of a difference in the ride. As always, thanks for your help.
pudge is offline  
Sponsored Links
Advertisement
 
post #2 of 20 (permalink) Old Dec 16th, 13, 11:24 AM
Gold Lifetime Member
Mike
 
Join Date: Apr 2002
Location: Walla Walla, WA
Posts: 4,294
Re: ride quality

Quote:
Originally Posted by pudge View Post
hello everyone. I am thinking of changing my rear wheels and tires from 315x35x17 tire size to a 255 or 275 x45 x17 to improve the ride quality.I understand this will require narrower rims to accomadate the smaller tire.It will probably cost about $1000 to make the change. With everything else remaining the same on my car,will there be much of a difference in the ride. As always, thanks for your help.
What rear shocks are you running? I'd seriously consider replacing shocks before investing $1,000 in new/reworked wheels and tires.

Mike - '68 Camaro with lots of stuff done to it.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Mkelcy is offline  
post #3 of 20 (permalink) Old Dec 16th, 13, 11:47 AM Thread Starter
Tech Team
bob
 
Join Date: Mar 2011
Location: pa
Posts: 34
Re: ride quality

they are DSE/Koni in the rear and DSE/Koni Aluminum body coilover shock in the front
pudge is offline  
 
post #4 of 20 (permalink) Old Dec 16th, 13, 11:48 AM
DjD
Retired
Dennis
 
DjD's Avatar
 
Join Date: Apr 1999
Location: Fortuna, CA
Posts: 26,484
Garage
Re: ride quality

What's been done to the car and suspension to accommodate the 315-35's?

What size wheel and back spacing are the 315's mounted on now?

...Dennis

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


"Don't take life so serious, you won't get out alive..."
DjD is offline  
post #5 of 20 (permalink) Old Dec 16th, 13, 11:50 AM
Gold Lifetime Member
Mike
 
Join Date: Apr 2002
Location: Walla Walla, WA
Posts: 4,294
Re: ride quality

Quote:
Originally Posted by pudge View Post
they are DSE/Koni in the rear and DSE/Koni Aluminum body coilover shock in the front
Adjustable in the rear? If so, have you dialed down compression damping?

Mike - '68 Camaro with lots of stuff done to it.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Mkelcy is offline  
post #6 of 20 (permalink) Old Dec 16th, 13, 12:16 PM Thread Starter
Tech Team
bob
 
Join Date: Mar 2011
Location: pa
Posts: 34
Re: ride quality

the rear has 2 in drop springs and the rim size is 17x11 with a 5.25 backspace
pudge is offline  
post #7 of 20 (permalink) Old Dec 16th, 13, 12:20 PM
Gold Lifetime Member
Mike
 
Join Date: Apr 2002
Location: Walla Walla, WA
Posts: 4,294
Re: ride quality

Quote:
Originally Posted by pudge View Post
the rear has 2 in drop springs and the rim size is 17x11 with a 5.25 backspace
I meant the shocks.

Mike - '68 Camaro with lots of stuff done to it.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Mkelcy is offline  
post #8 of 20 (permalink) Old Dec 16th, 13, 12:24 PM
DjD
Retired
Dennis
 
DjD's Avatar
 
Join Date: Apr 1999
Location: Fortuna, CA
Posts: 26,484
Garage
Re: ride quality

Bob - there must be more done, the 11" wide wheels with 5.25 bs just wouldn't fit in a stock '69 wheel well let alone one with a 2" drop. I was expecting to hear "mini-tub w/shortened rear axle or something like that or old school fender flairs...

...Dennis

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


"Don't take life so serious, you won't get out alive..."
DjD is offline  
post #9 of 20 (permalink) Old Dec 16th, 13, 01:06 PM Thread Starter
Tech Team
bob
 
Join Date: Mar 2011
Location: pa
Posts: 34
Re: ride quality

Sorry guys but i am fairly new at this. The rear shocks are non adjustable. the car has been tubbed and it has a 9 in ford rear but the fenders are stock. Does that help?
pudge is offline  
post #10 of 20 (permalink) Old Dec 16th, 13, 01:57 PM
Gold Lifetime Member
Mike
 
Join Date: Apr 2002
Location: Walla Walla, WA
Posts: 4,294
Re: ride quality

What is it doing that you don't like?

Mike - '68 Camaro with lots of stuff done to it.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Mkelcy is offline  
post #11 of 20 (permalink) Old Dec 17th, 13, 05:26 AM Thread Starter
Tech Team
bob
 
Join Date: Mar 2011
Location: pa
Posts: 34
Re: ride quality

Mike,It seems like you could feel even the smallest bounce you go over and it is definetly coming from the rear of the car.I had the car on a lift and checked everything.Nothing is broken or loose,thats why I am wondering if its just the 35 series tires causing all the roughness. thanks.Bob
pudge is offline  
post #12 of 20 (permalink) Old Dec 17th, 13, 07:58 AM
Gold Lifetime Member
Mike
 
Join Date: Apr 2002
Location: Walla Walla, WA
Posts: 4,294
Re: ride quality

Quote:
Originally Posted by pudge View Post
Mike,It seems like you could feel even the smallest bounce you go over and it is definetly coming from the rear of the car.I had the car on a lift and checked everything.Nothing is broken or loose,thats why I am wondering if its just the 35 series tires causing all the roughness. thanks.Bob
What you're describing sounds like "stiction"; the initial resistance to movement. I'd look at leaf springs bushings and rear shocks.

If the car's mini-tubbed, the shock mount points have been relocated. Are the shocks the proper length and could they be binding?

Don't get me wrong 2" drop springs and 35 series tires in a first gen Camaro won't ride like a Camry, but you shouldn't be getting beaten up on small bumps.

Mike - '68 Camaro with lots of stuff done to it.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Mkelcy is offline  
post #13 of 20 (permalink) Old Dec 17th, 13, 09:44 AM
DjD
Retired
Dennis
 
DjD's Avatar
 
Join Date: Apr 1999
Location: Fortuna, CA
Posts: 26,484
Garage
Re: ride quality

Can you come up with a part number for the Koni shocks? I bet they are adjustable and are set to the firmest setting. I have Koni Classic shocks and run them on the lightest setting in the rear because the firmest was way to stiff for street use.

Now as for wheel and tire fitment if you decide to change what you have you'll need to start with what you have and convert the backspacing to offset assuming everything fits properly. Once you have the offset then you just pick a wheel with the same offset in the size of choice. An 11" wheel with 5.25" bs has an offset of -19 (stock you would want about a +6 to center the wheel between inner and outer fenders). If you went down to a 9.5" wide wheel you would want a 4.5" backspacing in order to maintain the same center line as your existing wheels. Unfortunately the tire would probably look lost in the wheel well if you made that change.

I would work on shock adjustment and proper fit first, then if your rear springs are using solid bushings I would replace those with urethane and them possibly look into a tire with a bit more sidewall if they are available and not too tall overall!

...Dennis

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


"Don't take life so serious, you won't get out alive..."
DjD is offline  
post #14 of 20 (permalink) Old Dec 18th, 13, 05:26 AM Thread Starter
Tech Team
bob
 
Join Date: Mar 2011
Location: pa
Posts: 34
Re: ride quality

Dennis, the shocks I have are the Koni yellow and you are correct,,,they are adjustable. I am going to pull one off this weekend and check the setting and I will let you know. Thank you for your help also thank Mike for his thoughts.
pudge is offline  
post #15 of 20 (permalink) Old Dec 18th, 13, 07:19 AM
Moderator
John
 
Vega$69's Avatar
 
Join Date: Sep 2010
Location: Vegas NV/Wesley Chapel FL
Posts: 12,548
Garage
Re: ride quality

Going from a 35 to a 45 will not make enough diff to make it worth it

I would be looking at springs and shocks to take the harshness out of the ride.

66 Chevelle Protour LS3/525(SOLD AT Mecum 2018)
69 SS396 Cortez Silver(SOLD)
69 Z28(Sold)
69 Pro Tour - LS3/T56
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
(SOLD)
69 Pro Tour - LS7/T56 (SOLD)
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

69 Z28/RS Tribute355/5 Speed (SOLD)
69 RS Clone 427/TH400 (SOLD)
67 RSZZ502/5 Speed (SOLD)
69 Camaro 406 SBC/TH400 (SOLD)
Vega$69 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome