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 > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-09-2017, 11:03 PM   #1
Bobby Pootz
Registered User
 
Bobby Pootz's Avatar
 
Join Date: Jan 2017
Location: Everett, WA
Posts: 146
Any way to improve the turning radius?

I'm curious if there's any way to improve the turning radius of the squarebody without having to replace the entire front axle to a Porterbuilt or rack and pinion.

It's a long shot I'm sure but I thought it's worth asking! I know I need to get used to this old truck but wow is it not very nimble in small spaces!

Thanks folks!

Rob
Bobby Pootz is offline   Reply With Quote
Old 03-10-2017, 12:12 AM   #2
Bandit130
Registered User
 
Bandit130's Avatar
 
Join Date: Dec 2014
Location: Euless, Texas
Posts: 510
Re: Any way to improve the turning radius?

I am currently sharing your pain with my 74 C10. Had a 72 C10 prior and it had more turning radius than the 74. Is hard to deal with at times.
__________________
1974 Cheyenne 10 LWB Stock 350 W/HEI /TH350/AC/4 BBL Quadrajet


Mopar by Birth
Chevy by Choice
Bandit130 is online now   Reply With Quote
Old 03-10-2017, 12:17 AM   #3
Nessmuk
Registered User
 
Join Date: Feb 2017
Location: Buskirk
Posts: 39
Re: Any way to improve the turning radius?

Connect a separate parking brake to each rear wheel. Works on the Farmall...
Nessmuk is offline   Reply With Quote
Old 03-10-2017, 12:35 AM   #4
my56chevytruck
Registered User
 
my56chevytruck's Avatar
 
Join Date: Feb 2016
Location: Hebron
Posts: 1,131
Re: Any way to improve the turning radius?

Quote:
Originally Posted by Bobby Pootz View Post
I'm curious if there's any way to improve the turning radius of the squarebody without having to replace the entire front axle to a Porterbuilt or rack and pinion.

It's a long shot I'm sure but I thought it's worth asking! I know I need to get used to this old truck but wow is it not very nimble in small spaces!

Thanks folks!

Rob
Hey Rob, just curious, do you know what steering box you've got? What's the gear ratio on it? that's where I'd be looking into. my .02
__________________
RUBBER DOWN AND HIT THE ROAD!!!
1940 Ford Dlx Coupe
1969 Mach1
my56chevytruck is offline   Reply With Quote
Old 03-10-2017, 04:01 AM   #5
bilfman
Registered User
 
bilfman's Avatar
 
Join Date: Dec 2011
Location: Regina, SK, Canada
Posts: 622
Re: Any way to improve the turning radius?

Get posi and burn a doughnut 😮
__________________
1979 Chevy Dually Crew 4X4 454, D60 Tru-trac, D70 Detroit Locker, 3.73, 4L80E/NP205

1971 GMC 3/4 Ton 4X4
bilfman is offline   Reply With Quote
Old 03-10-2017, 04:23 AM   #6
donut
Registered User
 
donut's Avatar
 
Join Date: Aug 2009
Location: S.C.
Posts: 1,593
Re: Any way to improve the turning radius?

Donut abuse!

Try a 4x4 CCLB, you'll appreciate how nimble a C-10 is. Over the years, I've just learned the limitations and dealt with them.
__________________
'86 C-30 dually, 454/tbh400
'73 K-20 350/350/205 (sold )

I'm kinda like duct tape- no real purpose, but handy to have around.
donut is offline   Reply With Quote
Old 03-10-2017, 08:41 AM   #7
andrewmp6
Registered User
 
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
Re: Any way to improve the turning radius?

You could replace your steering box with something with a faster ratio in it.Companies like https://www.redheadsteeringgears.com/ and http://leepowersteering.com/ can do it for a fee tho.Or their is one or two rack and pinion kits for the stock stuff but both are kinda pricey.
andrewmp6 is offline   Reply With Quote
Old 03-10-2017, 09:17 AM   #8
cadillac_al
Registered User
 
Join Date: Oct 2013
Location: Maine
Posts: 2,343
Re: Any way to improve the turning radius?

Lots of guys are running around with extended cab trucks wishing they had our turning radius. I don't think there is much we can do.
__________________
76 Chevy K20
76 GMC K15
77 Chevy C10
77 Chevy K10
cadillac_al is offline   Reply With Quote
Old 03-10-2017, 09:58 AM   #9
andrewmp6
Registered User
 
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
Re: Any way to improve the turning radius?

A faster steering ratio helps but sometimes your kinda sol also.
andrewmp6 is offline   Reply With Quote
Old 03-10-2017, 11:00 AM   #10
Keith Seymore
Registered User
 
Keith Seymore's Avatar
 
Join Date: May 2009
Location: Motor City
Posts: 9,165
Re: Any way to improve the turning radius?

Quote:
Originally Posted by Nessmuk View Post
Connect a separate parking brake to each rear wheel. Works on the Farmall...
Nice!
__________________
Chevrolet Flint Assembly
1979-1986
GM Full Size Truck Engineering
1986 - 2019
Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926
My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524
Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/
Keith Seymore is offline   Reply With Quote
Old 03-10-2017, 11:55 AM   #11
Ziegelsteinfaust
Registered User
 
Join Date: Dec 2012
Location: Temple City
Posts: 3,566
Re: Any way to improve the turning radius?

My 74 C20 rclb was to me no different then my 07 GMC rcsb. Both had the same OD for tires.

Also the steering boxes can make a big difference.
Ziegelsteinfaust is offline   Reply With Quote
Old 03-10-2017, 02:25 PM   #12
Bobby Pootz
Registered User
 
Bobby Pootz's Avatar
 
Join Date: Jan 2017
Location: Everett, WA
Posts: 146
Re: Any way to improve the turning radius?

All great suggestions! I appreciate being a SB but can still dream can't I? And I'd love to pull a donut into a parking space, that would be so badass!
Bobby Pootz is offline   Reply With Quote
Old 03-12-2017, 03:34 PM   #13
Pontiac1976
Registered User
 
Pontiac1976's Avatar
 
Join Date: Oct 2015
Location: Ottawa, Ontario, Canada
Posts: 752
Re: Any way to improve the turning radius?

Not sure but if you ever drove a ford or dodge of the same year you will see that chev/gmc are much betterat turning. There big wide to hold the road. If you want to make solomon truck of one of those years trucks you have to spend money.

How good is your frt.bushing do you have swaybar in the frt. change your steering shaft assembly (up grade it) What your set up rims tire. Stock rim size of 15x6 up front 235/75 . The 2wd turn better then the 4x4 but not buy much.
__________________
1977 REG cab Long Bed with a 1984 Front Clip, 82 305 .60 over 9.0.1 flat top pistons, 4bbl, TH350, w/84 SS-intake & cam , w/ 1977 big block rad, 1975 gear box, 1984 master w/ metric fittings top & SAE fitting @ portion block, 1975 3.42 gear open diff. Duel 77-87 Factory air cleaner, duel inlet from rad support . Down sized 9' to new 8' Steel flat bed
Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change.

Last edited by Pontiac1976; 03-12-2017 at 03:54 PM.
Pontiac1976 is offline   Reply With Quote
Old 03-13-2017, 02:10 AM   #14
andrewmp6
Registered User
 
Join Date: Jan 2009
Location: Louisville,Ky
Posts: 5,811
Re: Any way to improve the turning radius?

Yeah about same year ford crew cab long bed feels like your parking a 747 lol.
andrewmp6 is offline   Reply With Quote
Old 03-13-2017, 07:36 AM   #15
SkinnyG
Registered User
 
SkinnyG's Avatar
 
Join Date: Feb 2012
Location: Beautiful BC, Canada, eh?!
Posts: 2,189
Re: Any way to improve the turning radius?

The steering stops and designed-in Ackerman are the limiting factor in turning radius.
__________________
1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, boosted-LS
1977 Silverado: Shortboxed & dropped, potato-potato
V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag
Lotus Super 7 Replica: Scratch-built street-legal rollerskate
SkinnyG is offline   Reply With Quote
Old 03-21-2017, 10:33 AM   #16
LT7A
Registered User
 
Join Date: Oct 2015
Location: PNW
Posts: 3,528
Re: Any way to improve the turning radius?

Help me out on the quick ratio steering boxes improving turning radius. Is this right? I don't think the limitation is in the box, I think it's in the linkage.

The two things I know that make a difference are that wider tires widen the turning radius (so narrower would improve it). And that the slower you go, the tighter you can turn. Seems obvious, but when the tires are at that extreme angle, they push out/slide forward very easily. I have to crawl slower than I like when making a u-turn at a light.

Beyond that, I would turn the wheels to lock, see where the linkage stopped, and see if there was any grinding I could do -- within reasonable limits of course. I couldn't recommend the grinding, but maybe there is a margin of safety that can be worked within.
LT7A is offline   Reply With Quote
Old 03-21-2017, 12:51 PM   #17
Tom
driving is in my blood
 
Tom's Avatar
 
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,701
Re: Any way to improve the turning radius?

Yeah I'm really curious for a techincal explanation how a faster steer ratio helps with turn radius? It doesn't matter what the ratio is, full lock to full lock is the same you just get there with more or less turns of the steering wheel. The spindle and steering linkages have everything to do with radius and I have no idea how you'd modify them for more angle.
__________________
-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle.
-98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes.
-02 Suburban 4x4: leveled front
-CBR600F4i, CBR600RR, CBR1000RR, and standup skis
DISCLAIMER: I cant spell for the life of me.
Tom is offline   Reply With Quote
Old 03-21-2017, 09:01 PM   #18
75C10
Registered User
 
Join Date: Oct 2014
Location: Calgary Alberta
Posts: 160
Re: Any way to improve the turning radius?

Quicker steering is not the solution. Shorter wheel base helps. I found that my spindles had stops that were not allowing as tight a turn as the stock spindle. Removal of some material from the stops will improve the turn radius. Be reasonable with your grinding.
75C10 is offline   Reply With Quote
Old 03-21-2017, 09:07 PM   #19
Gmc.guy
Registered User
 
Gmc.guy's Avatar
 
Join Date: Nov 2015
Location: Alberta
Posts: 464
Re: Any way to improve the turning radius?

Quicker ratio steering helps with turns like the Austin Powers 10 point turn in the hallway
__________________
-Cody
Gmc.guy is offline   Reply With Quote
Old 03-25-2017, 08:52 AM   #20
Axle
Registered User
 
Axle's Avatar
 
Join Date: Jul 2011
Location: SW Ontario
Posts: 1,199
Re: Any way to improve the turning radius?

How does quick ratio/variable ratio help? If it is while moving, it lets you get the wheel to the stops faster and you _perceive_ a tighter turning radius.

My 1983 had the factory variable ratio box, it felt like I could squeeze into any place needed cause I could get it turning faster and to full lock very quickly.

My 1981 with a standard box feels like it needs a football field to turn. Once I get used to flinging my arms around at ridiculous speeds it gets into the same spaces the 83 does, just takes longer due to needing to drive slower and turn the steering wheel a lot more. One thing that helped a bit, both for perceived turnability and actually speeding things up was going to the 15" diameter steering wheel. It wasn't much of a diameter change over the stock 81 wheel, but it was enough to notice it.

Alex.
Axle is offline   Reply With Quote
Old 03-26-2017, 08:26 PM   #21
cheap
Registered User
 
Join Date: Jul 2015
Location: earth
Posts: 99
Re: Any way to improve the turning radius?

Faster ratio will not change turning radius, the turning radius is set by the factory with spindle stops on the control arms as well as linkage limitations and extreme ackermann effect at high steering angles. The only way to make a shorter turning radius is to remove the steering stops on the control arms, but the linkage will probably not like that much angle in stock form
cheap 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 12:47 PM.


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