The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Racing and high performance (trucks haulin more than hay)

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-02-2012, 05:54 PM   #1
funnyfarmracer
Registered User
 
Join Date: Jun 2008
Location: porter texas
Posts: 57
Help!!! LOL

Having serious problems with wheel hop. 1969 C-10 lwb ford 9", stock trailing arms, A-body rear springs, stock six cylinder front springs. I have already broke a few axles it wheel hops so bad.
funnyfarmracer is offline   Reply With Quote
Old 07-02-2012, 09:06 PM   #2
djracer
Registered User
 
djracer's Avatar
 
Join Date: Feb 2001
Location: Wetumpka, Al, U.S.
Posts: 8,892
Re: Help!!! LOL

never had much trouble with hop on trailing arms. I would try some adjustable rear shocks.
__________________
Kevin

Special Thanks to All who have helped on the TRUCK!

My Pass Time Show http://s129.photobucket.com/albums/p...Chapter1-0.mp4

So Far my best Times are:

Motor only:
6.44 1/8 @ 104.13
10.39 1/4 @ 125.83

Nitrous Times:
5.785 1/8 @ 118.65 with a 1.336 60ft
9.168 1/4 @ 142.58 with a 250 shot dead out of the hole!
djracer is offline   Reply With Quote
Old 07-02-2012, 10:00 PM   #3
vin63
It's Better With Nitro
 
vin63's Avatar
 
Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,262
Re: Help!!! LOL

Quote:
Originally Posted by funnyfarmracer View Post
Having serious problems with wheel hop. 1969 C-10 lwb ford 9", stock trailing arms, A-body rear springs, stock six cylinder front springs. I have already broke a few axles it wheel hops so bad.
There are a lot of things that can contribute to wheel hop on a launch, but my first question is what kind and size of tire are you running, and at what pressure?
__________________
1963 C-10: Deluxe-optioned cab, shortbed, fleetside
Pontiac 462 ci, Kauffman D-Port alum. heads
4L80E, narrowed sheetmetal Ford 9-inch
Tubular front and rear suspension
Custom 6-piston front disc and 4-piston rear disc brakes
vin63 is offline   Reply With Quote
Old 07-02-2012, 10:13 PM   #4
Marv D
Registered Truck Offender
 
Marv D's Avatar
 
Join Date: May 2008
Location: hells training ground (aka Ariz)
Posts: 3,118
Re: Help!!! LOL

If you come back saying you have air shocks were gonna slap you silly (lol) Air shocks are notorious for wheel hop. You know that right.... but with the luck others have with the trailing arm suspension,, I'd agree it's gotta be shock or tire like Kevin and Vin are saying.

I would also ask how hard your hiting the tire with power? What kind of 60 and 1/4 mile ET/MPH are we talking about here?







Happy 4th of July to all our boys serving world wide. THANK YOU

__________________
Still playin with trucks, even at my age!

When you're dead, it's only a problem for the people around you, because you don't know you're dead.
.....It's kinda the same when your STUPID.


I just did my taxes and reviewed my SS statement. Thanks to the current administration it looks like I will only have to work till noon on the day of my funeral.

Last edited by Marv D; 07-02-2012 at 10:26 PM.
Marv D is offline   Reply With Quote
Old 07-03-2012, 03:40 PM   #5
funnyfarmracer
Registered User
 
Join Date: Jun 2008
Location: porter texas
Posts: 57
Re: Help!!! LOL

It has regular kyb's on the back. Truck has 295/65-15 mt drag radials and a sbc. It is a mild 421 with steel sportsman heads a mild .500lift solid cam and a th350 trans. I just put this motor in it. But with the old 355 it ran 7.63 and would 60ft 1.60's. I have tried running some 28x10.50-15 slicks and it still hops bad. I am tired of breaking axles.
funnyfarmracer is offline   Reply With Quote
Old 07-03-2012, 03:50 PM   #6
Super73
Registered User
 
Super73's Avatar
 
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,841
Re: Help!!! LOL

Make sure there is no bind in the rear suspension.
Check the rear bushings.
Try putting a diferent shock on it.

Does it have a rear aniti roll bar?
__________________
------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49

Last edited by Super73; 07-03-2012 at 03:58 PM.
Super73 is offline   Reply With Quote
Old 07-03-2012, 05:35 PM   #7
funnyfarmracer
Registered User
 
Join Date: Jun 2008
Location: porter texas
Posts: 57
Re: Help!!! LOL

No anti roll bar. Nothing seems to be binding. The truck tries to transfer weight but then seems like it just unloads and starts hopping. The truck used to hook in a mud hole! LOL After I lowered it a couple of inches it has been crap ever since.
funnyfarmracer is offline   Reply With Quote
Old 07-03-2012, 06:49 PM   #8
cableguy0
Senior Member
 
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,948
Re: Help!!! LOL

Quote:
Originally Posted by funnyfarmracer View Post
No anti roll bar. Nothing seems to be binding. The truck tries to transfer weight but then seems like it just unloads and starts hopping. The truck used to hook in a mud hole! LOL After I lowered it a couple of inches it has been crap ever since.
You just answered your own question. How did you lower the truck? Springs?
__________________
Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member.
cableguy0 is offline   Reply With Quote
Old 07-04-2012, 09:41 AM   #9
vin63
It's Better With Nitro
 
vin63's Avatar
 
Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,262
Re: Help!!! LOL

Quote:
Originally Posted by funnyfarmracer View Post
... After I lowered it a couple of inches it has been crap ever since.
Did you also adjust the pinion angle to compensate for the change in chassis height?

Here is some general reading about pinion angle, ride height, etc.

http://www.deanoshiro.com/suspension/setup.html

http://www.rosslertrans.com/Pinion%20angle.htm
__________________
1963 C-10: Deluxe-optioned cab, shortbed, fleetside
Pontiac 462 ci, Kauffman D-Port alum. heads
4L80E, narrowed sheetmetal Ford 9-inch
Tubular front and rear suspension
Custom 6-piston front disc and 4-piston rear disc brakes
vin63 is offline   Reply With Quote
Old 07-04-2012, 02:16 PM   #10
Super73
Registered User
 
Super73's Avatar
 
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,841
Re: Help!!! LOL

Did you lower it at the same time you put the new bigger motor in?
__________________
------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
Super73 is offline   Reply With Quote
Old 07-04-2012, 02:20 PM   #11
funnyfarmracer
Registered User
 
Join Date: Jun 2008
Location: porter texas
Posts: 57
Re: Help!!! LOL

It was lowered before the new motor install.
funnyfarmracer is offline   Reply With Quote
Old 07-04-2012, 02:28 PM   #12
Super73
Registered User
 
Super73's Avatar
 
Join Date: Nov 2007
Location: Bay Area, Ca
Posts: 2,841
Re: Help!!! LOL

Did it have traction problems lowered with the 355?

What did you do to lower it?
__________________
------Motor---------------Bottle
60'---1.53---------------1.41
1/8---6.58 @ 105.92----5.87 @ 118.41
1/4---10.38 @ 126.97----9.24 @ 142.49
Super73 is offline   Reply With Quote
Old 07-05-2012, 10:02 AM   #13
funnyfarmracer
Registered User
 
Join Date: Jun 2008
Location: porter texas
Posts: 57
Re: Help!!! LOL

I've had traction issues ever since I lowered it. I guess I need to try changing rear springs.
funnyfarmracer is offline   Reply With Quote
Old 07-05-2012, 12:05 PM   #14
vin63
It's Better With Nitro
 
vin63's Avatar
 
Join Date: Apr 2008
Location: Chino Hills, CA
Posts: 2,262
Re: Help!!! LOL

The springs are one of the last things I would change in a wheel-hop-on-launch issue, but feel free to change out what you like.
__________________
1963 C-10: Deluxe-optioned cab, shortbed, fleetside
Pontiac 462 ci, Kauffman D-Port alum. heads
4L80E, narrowed sheetmetal Ford 9-inch
Tubular front and rear suspension
Custom 6-piston front disc and 4-piston rear disc brakes
vin63 is offline   Reply With Quote
Old 07-06-2012, 10:06 AM   #15
funnyfarmracer
Registered User
 
Join Date: Jun 2008
Location: porter texas
Posts: 57
Re: Help!!! LOL

Quote:
Originally Posted by vin63 View Post
The springs are one of the last things I would change in a wheel-hop-on-launch issue, but feel free to change out what you like.
What would you try first?
funnyfarmracer is offline   Reply With Quote
Old 07-06-2012, 02:39 PM   #16
kpeztruck
Registered User
 
kpeztruck's Avatar
 
Join Date: Sep 2010
Location: Canton, GA
Posts: 229
Re: Help!!! LOL

I would put an adjustable shock on the rear. You will then be able to adjust it to hold the tire down. Right now, it appears that you are not able to control the lighter rear spring, and it is oscillating out of control. The shock is designed to control this characteristic. The heavier springs originally in it resisted being compressed, which helped you some. I hope this helps some. Paul
kpeztruck is offline   Reply With Quote
Old 07-10-2012, 10:03 AM   #17
funnyfarmracer
Registered User
 
Join Date: Jun 2008
Location: porter texas
Posts: 57
Re: Help!!! LOL

Quote:
Originally Posted by kpeztruck View Post
I would put an adjustable shock on the rear. You will then be able to adjust it to hold the tire down. Right now, it appears that you are not able to control the lighter rear spring, and it is oscillating out of control. The shock is designed to control this characteristic. The heavier springs originally in it resisted being compressed, which helped you some. I hope this helps some. Paul
Thank you. Your detailed response makes you sound all smart and stuff! LOL Really appreciate the explanation.
funnyfarmracer is offline   Reply With Quote
Old 07-15-2012, 01:09 PM   #18
oneperfectrun
Registered User
 
oneperfectrun's Avatar
 
Join Date: Aug 2011
Location: Fulton, MS
Posts: 87
Re: Help!!! LOL

I agree with the above post on springs, shocks and pinion angle. My first thought was the shocks but if you changed springs and lowered it, springs could possibly be the problem. I would definately start with checking pinion angle. If you didn't adjust pinion angle to compensate for the lowering that could be the majority or even all of your problem and it's a simple cheap fix. Pinion angle can make all the difference in the world on something that hooks and something that spins.
Posted via Mobile Device
oneperfectrun is offline   Reply With Quote
Reply

Bookmarks


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 -4. The time now is 09:02 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com