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#76 |
Registered User
Join Date: Dec 2002
Location: Cactus Patch So. Az
Posts: 4,749
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Re: My caster mod (with pictures)
Chevyrestroguy, Any updates on your truck!
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53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42 |
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#77 |
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Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
I'm mocking my parts up to do this mod but it looks like my lca only has .5" before it will hit the saddle during travel. Tons of space everywhere else, just the part of the lca that kicks out will be hitting. Has anyone run into this? The suspension is stock '72 so far.
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1968 LWB C20 / AC / Wood Bed |
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#78 |
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Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
Another angle. This is slightly past stock bumpstop travel.
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1968 LWB C20 / AC / Wood Bed |
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#79 | |
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Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,963
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Re: My caster mod (with pictures)
Quote:
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#80 |
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Join Date: Dec 2009
Location: Kirkland, WA
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Re: My caster mod (with pictures)
Thanks, I guess I'll go for it. Trim until it fits seems to be the consensus in general...
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1968 LWB C20 / AC / Wood Bed |
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#81 |
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Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
Ok I just went and tried to drill my cross-shaft... what kind of drill bit are you guys using? I didn't even make a dent. I have new TRW cross shafts and they seem to be made of a metallic form of diamond.
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1968 LWB C20 / AC / Wood Bed |
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#82 |
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![]() Join Date: Mar 2005
Location: apple valley, ca
Posts: 2,670
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Re: My caster mod (with pictures)
When I had mine done, I took them to a friend's machine shop and we chucked them up in a lathe and used a flat bottom carbide end mill. A local machine shop would not charge you much to do this. A standard hardware store drill bit set isn't hard enough to drill the hardened cross shaft. Plus, using a mill is much more precise because you can lock the shaft in the mill and get the new pin locations located exactly.
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Check out my latest endeavor: https://roundsixpod.com My build threads: '55 Chevy: http://67-72chevytrucks.com/vboard/s...d.php?t=247512 '64 C-20: http://67-72chevytrucks.com/vboard/s...d.php?t=446527 |
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#83 |
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Join Date: Dec 2002
Location: Cactus Patch So. Az
Posts: 4,749
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Re: My caster mod (with pictures)
So you trimmed the arm and not the cross member?
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53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42 |
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#84 |
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![]() Join Date: Mar 2005
Location: apple valley, ca
Posts: 2,670
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Re: My caster mod (with pictures)
I have been working some insane hours for the past 6 months, but I have been working on the '64 whenever I have the time. I've gotten a lot of stuff done, mostly the tedious little jobs that drive you crazy. I'll post up progress pictures soon.
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Check out my latest endeavor: https://roundsixpod.com My build threads: '55 Chevy: http://67-72chevytrucks.com/vboard/s...d.php?t=247512 '64 C-20: http://67-72chevytrucks.com/vboard/s...d.php?t=446527 |
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#85 |
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Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,963
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Re: My caster mod (with pictures)
I did a little off both as I did not want to trim too much off the 'ear' of the arm.
I installed my modified arms & was able to achieve 100% suspension compression w/o contact but ultimately switched to Porterbuilt tubular arms for other reasons.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#86 |
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Join Date: Jan 2013
Location: Imperial, MO
Posts: 999
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Re: My caster mod (with pictures)
FYI, before you drill your new lower control arm shafts, verify that they match the stock hole position. Some aftermarket shafts come with the hole already moved a bit.
http://67-72chevytrucks.com/vboard/s...&postcount=237 |
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#87 | |
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Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
Quote:
That sucks that I can't drill the hole myself, I bought a set of reduced shank bits just for this purpose! What if I just angle grind a notch across the shaft? If I go the right depth it would still prevent the shaft from rotating.
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1968 LWB C20 / AC / Wood Bed |
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#88 | |
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Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,963
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Re: My caster mod (with pictures)
Quote:
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#89 |
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Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
If the locating nub is sitting flat on a flat surface of the shaft, the shaft won't spin without the u-bolts loosening significantly or the shaft rounding out. I can't see either of those happening without some other problems going on, and in those cases a rotating shaft would be the least of my worries!
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1968 LWB C20 / AC / Wood Bed |
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#90 | |
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Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,963
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Re: My caster mod (with pictures)
Quote:
I'll stick w/doing it the way the engineers designed it. Seems safer to me.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#91 | |
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Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
Quote:
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1968 LWB C20 / AC / Wood Bed |
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#92 |
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Join Date: Sep 2013
Location: Vacaville CA
Posts: 490
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#93 |
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Join Date: Jan 2013
Location: Imperial, MO
Posts: 999
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Re: My caster mod (with pictures)
The ones in the link I posted above are Mevotech brand. Part number MK6147 on RockAuto.
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#94 |
Registered User
Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
Mine are TRW 13168A made in USA
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1968 LWB C20 / AC / Wood Bed |
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#95 |
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Join Date: Sep 2013
Location: Vacaville CA
Posts: 490
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Re: My caster mod (with pictures)
Thanks. I'd be interested to know how many degrees that adds.
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#96 | |
Registered User
Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
Quote:
Assuming 9" between ball joints and a currently vertical spindle, 3.14 * (4.5^2) = 64 (radius of a circle) 360 * (64 * .25) = 1.4 degrees (360 degrees in a circle times the fraction of the circle that is 1/4") So 1" should net about 5.6*, 3/4" would be around 4.2* gain
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1968 LWB C20 / AC / Wood Bed Last edited by crakarjax; 07-22-2015 at 11:35 PM. |
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#97 |
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Join Date: Dec 2009
Location: Kirkland, WA
Posts: 1,302
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Re: My caster mod (with pictures)
I ended up grinding a small flat in the shaft and then drilling with a 5/8" masonry bit. I noticed in the process that I didn't need to sink the hole in the shaft at all on the sides because the locating pin sits flush with the seats as they slope upward -- I think grinding flats for locating would work just fine considering this, since a sunk hole is actually just removing material that doesn't need to be there. Using a cap screw might be a different story though depending on the head depth.
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1968 LWB C20 / AC / Wood Bed |
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#98 |
A guy with a truck
Join Date: Sep 2005
Location: Germany, for now
Posts: 5,920
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Re: My caster mod (with pictures)
Anyone done this with CPP arms?
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-Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy |
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#99 |
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Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,963
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Re: My caster mod (with pictures)
I would measure CPP's vs OE. Seems like they do this from the start & why they can advertise 'improved geometry'.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#100 |
A guy with a truck
Join Date: Sep 2005
Location: Germany, for now
Posts: 5,920
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Re: My caster mod (with pictures)
Research has led me to believe they gain caster via the uppers, which would pull the wheel back further.
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-Chris Instagram _elgringoloco_ '70 Short-Wide How to: Ruin a perfectly good C10 ‘70 Blazer ConversionHow To: Ruin a Perfectly Good 4wd '72 Highlander How To: Ruin a Perfectly Good K/5 (SOLD) '72 Blazer 2WD How to: Ruin a perfectly good Blazer (SOLD) '05 Yukon Daily Driven (not so stock) Yukon (SOLD) ‘07 Yukon Denali (daily) Members met list: SCOTI, darkhorse970, 67cheby, 67cheby'sGirl, klmore, porterbuilt, n2billet, Fastrucken, classicchev, Col Clank, GSFMECH, HuggerCST, Spray-Bomb, BACKYARD88, 5150, fine69, fatbass, smbrouss70, 65StreetCruiser, GAc10boy |
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