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#1 |
Registered User
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Location: Missoula, MT
Posts: 934
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Re: No Limit '72 C-10
This build and the “make it handle” thread have been the most influential information on the board for me and I want to say thank you! Just so I have this clear, and I am sure others are curious as well, with the 4" of kick to the frame and the 2" blocks this truck sits 6" lower in the rear than stock, or do the 9000 bags lower the truck even more?
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#2 |
Senior Member
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Location: Dandridge, Tn. USA
Posts: 2,226
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Re: No Limit '72 C-10
The 9000 bag on Ridetech bolt in mounts sits 2" lower than stock at ride height. That is the same as the spring we had. The JT sits appx 8" lower in the rear. 4" from frame mod, 2" block, 2" from bag/spring.
We did some basic plotting og camber gain/steering geometry on the lines of just sectioning the lower crossmember 2". This puts the upper arm at a pretty steep angle at RH. First problem was bumpsteer, this is fixable by bending the idler and pitman arms to adjust the inner pivit points. Next, the rear problem, this moves the Instant Center inboard a good ways, and raises the Roll Center causing more 'push'. But the real problem is that the IC moves all over the place during suspension travel, and the RC shifts left/right in a corner - thats bad. So, didn't pursue this to far, at this point the drive quality is heading down a rocky trail, and only going to get worse. if you section a crossmember, you should move all the mounting points.
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#3 |
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Join Date: Sep 2009
Location: ottawa,canada
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Re: No Limit '72 C-10
.....I'm sure you will figure it out....can't wait to see whats next!
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my build threads '86 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=415628 '67 C10 http://67-72chevytrucks.com/vboard/s...d.php?t=635078 '63 GMC http://67-72chevytrucks.com/vboard/s...d.php?t=674682 |
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#4 | |
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Join Date: Jan 2011
Location: Mount Airy, NC
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Re: No Limit '72 C-10
Quote:
Thanks,
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Jack Byrd '70 Chev Custom SWB(new to me), 307CID(added Weiand Stealth, headers and Edelbrock Performer carb, up to 17 MPG now), 700R4 '76 Airstream Argosy MH(want a longer one), 454CID, TH400 |
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#5 |
Senior Member
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Location: Dandridge, Tn. USA
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Re: No Limit '72 C-10
The reason for going 2" on the section is that the first thought of doing this is usually to drop the truck. so, a 3/4" section isn't done too much - it's a lot of work for a 3/4" drop. I was trying to see what would happen if the common mod was done just a bit different. As I am writing this, I am thinking I need to re-visit this. If your doing the section, perhaps 2" on the lower side, and 1 1/4" on the upper side. This would close up the hieght between the upper and lower arm mounts by appx 3/4" - hmm...
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#6 | |
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Join Date: Jan 2011
Location: Mount Airy, NC
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Re: No Limit '72 C-10
Quote:
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Jack Byrd '70 Chev Custom SWB(new to me), 307CID(added Weiand Stealth, headers and Edelbrock Performer carb, up to 17 MPG now), 700R4 '76 Airstream Argosy MH(want a longer one), 454CID, TH400 |
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#7 |
Still plays with trucks
Join Date: Jul 2009
Location: Spokane, WA
Posts: 3,570
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Re: No Limit '72 C-10
Thanks for the great build and for all the new parts you developed for our trucks because of it. Keep it up.
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69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been https://67-72chevytrucks.com/vboard/...d.php?t=484426 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E |
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#8 | |
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Join Date: Oct 2008
Location: Parsons, KS
Posts: 652
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Re: No Limit '72 C-10
Quote:
I don't see how the 2" + 1 1/4" will give you 3/4". Posted via Mobile Device
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#9 | |
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Join Date: Jan 2011
Location: Mount Airy, NC
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Re: No Limit '72 C-10
Quote:
Thanks,
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Jack Byrd '70 Chev Custom SWB(new to me), 307CID(added Weiand Stealth, headers and Edelbrock Performer carb, up to 17 MPG now), 700R4 '76 Airstream Argosy MH(want a longer one), 454CID, TH400 |
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#10 |
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Re: No Limit '72 C-10
Updates
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#11 |
67cheby
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Re: No Limit '72 C-10
Sweet
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#12 |
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Re: No Limit '72 C-10
More updates
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#13 |
needs more $$$
Join Date: Mar 2004
Location: Sacramento
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Re: No Limit '72 C-10
^ Fender rolling?...
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#14 |
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Re: No Limit '72 C-10
Yep, the old way. We put the spacers on to check clearance for wider wheels. Also, we wanted to check the handling with the wider track. So, next week we're going back to the track for some testing. I'm not a big fan of spacers, these are billit, well made, so we'll see. I do like the look.
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#15 |
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Join Date: Nov 2010
Location: Burrton, KS
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Re: No Limit '72 C-10
Rob might correct me, but I think he meant sectioning the crossmember 2" and moving the upper arm pivot up 1.25" which makes it to where the upper and lower pivots only move 3/4" closer to one another and you gain the full 2" of ground clearance plus an increase in camber gain
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#16 |
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Join Date: Oct 2008
Location: Parsons, KS
Posts: 652
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Re: No Limit '72 C-10
Well that makes much more sense, thanks.
And if you were to section the whole crossmember 2" wouldn't that also lower the coils upper mount the same, eliminating any drop you were trying to achieve? So it would still be best to section inbetween the uca mounts, correct? And then you could just lower the uca mounting points the 3/4"? Posted via Mobile Device
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#17 |
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Join Date: Nov 2010
Location: Burrton, KS
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Re: No Limit '72 C-10
Depending on how you section the cross member.....yeah. In my opinion, I would just notch the frame rails 2" to allow the crossmember to be moved up and just lower the uca mounts 3/4"......probably have to notch the crossmember for oil pan (and possibly balancer) clearance so that you can keep the engine as low as possible.......
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#18 | |
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Re: No Limit '72 C-10
Quote:
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#19 |
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Join Date: Oct 2008
Location: Parsons, KS
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Re: No Limit '72 C-10
Got another one......
Once you drop the uca mount X" and if you decide to narrow the track width by removing X amount from the lca or a custom lca, will that have a negative effect? Posted via Mobile Device
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#20 |
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Re: No Limit '72 C-10
We may be going a bit far here. I'm not a big fan of narrowing arms. If this is just for wheel/tire clearance, get a wheel with more backspace. Narrowing the track to get this done tends to have negative effects on everything else, so, i'd stay away from that if I could.
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#21 |
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Join Date: Oct 2008
Location: Parsons, KS
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Re: No Limit '72 C-10
Thought so, thanks Rob
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74 GMC SWB Project "Sin-thia" Static Dropped 8"f/10"r http://67-72chevytrucks.com/vboard/s...d.php?t=460030 ![]() 97 GMC reg cab short bed, 4.3V6 / 5spd, daily driver 220,000 miles, all stock for now |
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#22 |
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Join Date: Oct 2008
Location: Parsons, KS
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Re: No Limit '72 C-10
I have another question on the caster mod.....
Is there a reason for moving the lca forward 3/4" and uca 1/2" rearward instead of moving them both 5/8"? Posted via Mobile Device
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74 GMC SWB Project "Sin-thia" Static Dropped 8"f/10"r http://67-72chevytrucks.com/vboard/s...d.php?t=460030 ![]() 97 GMC reg cab short bed, 4.3V6 / 5spd, daily driver 220,000 miles, all stock for now |
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#23 |
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Join Date: Apr 2003
Location: Indep, MO
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Re: No Limit '72 C-10
Aggie-Page 8&9.
The headman part # is 45660. They are available plain, or HTP ceramic coated.
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#24 |
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Join Date: Sep 2011
Location: Jacksonville, FL
Posts: 150
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Re: No Limit '72 C-10
The more you move the lower forward the more it will center the tire in the fender well. Other than that, I don't see a reason. Someone correct me if I'm wrong...
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#25 |
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Join Date: Oct 2008
Location: Parsons, KS
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Re: No Limit '72 C-10
When I Zed my frame I moved the whole front suspension forward so my wheels are centered.
I was wondering if it had something to do with the steering? Posted via Mobile Device
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74 GMC SWB Project "Sin-thia" Static Dropped 8"f/10"r http://67-72chevytrucks.com/vboard/s...d.php?t=460030 ![]() 97 GMC reg cab short bed, 4.3V6 / 5spd, daily driver 220,000 miles, all stock for now |
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1972 chevy, c-10, no limit engineering |
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