2" block with 4" drop spring in the rear?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mbzaungst · 04-16-2018, 08:57 AM

Any issues running a 2 inch block with a 4 inch drop spring? I am planning to move shocks as well? Thanks for the help

**special-K** · 04-16-2018, 09:03 AM

None that wouldn't exist from only running the blocks. That lowers your scrub point by the block size, but only the trailing arms. My friend/neighbor built this truck with 4" drop f & r and decided to level it out with 2" blocks

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Name: IMG_2324.jpg
Views: 286
Size: 61.7 KB

EDIT: Now that I think about it, this would be before the block when the bed was first installed. He also put Vette rallyes on with other tires, but no pictures. But it worked out fine for him. Only picture I have

RustyBucket · 04-16-2018, 09:42 AM

I have 4" springs and a 1" block.... relocated short shocks & adj. panhard bar. Rides/drives pretty good. Picture is with worn 255/60's, replaced w/ 275/60's recently.

CC69Rat · 04-24-2018, 08:25 PM

This is going to sound stupid -- but bear with me.

Lets say a 200lb man jumps on a 12ft diving board. Boing, splash, he's in the water. Can you imagine how much the 12ft board would flex ? ( Just in your mind )

Now, cut 2ft off the board. Same dude.. boing, splash ..

Did the diving board flex more or less at 12ft, vs 10ft ?

Coils work the same way. All it is is a straight piece of wire that has been coiled up to create torsional rigidity. So, for a better ride quality you need a softer spring, less rigid and longer travel, right? A shorter stiffer spring will impact your ride quality.

So, if I could make a suggestion, I'd do a 4" spring drop and 2" block yes, and you would have any problems with it. Just saying, dont do 6" drop springs (all springs) the 4 / 2 will ride a little better. Make real sure you adjust the pinion angle too or you'll be having driveline vibrations. 3 maybe 4 degree shims on top of your drop blocks, or CPP sells the drop blocks with the pinion adjustment already in them. you want to roll the nose of the pinion back up toward the bed floor. If you shim it, put the larger end toward the cab, smaller end toward the rear bumper.

1badmonza · 04-25-2018, 07:57 AM

I got 2" blocks with 5" Drop CPP springs. I did C-Notch the frame to increase clearance because I only had about 1" between rearend tube and frame. Truck rides great still.

IMG_1386 by Mike Lanclos, on Flickr

IMG_1336 by Mike Lanclos, on Flickr

**raggedjim** · 04-25-2018, 10:58 AM

Quote:

Originally Posted by 1badmonza

I got 2" blocks with 5" Drop CPP springs. I did C-Notch the frame to increase clearance because I only had about 1" between rearend tube and frame. Truck rides great still.

Very nice truck. I want to do the same, what did you do in the front?

Rg

1badmonza · 04-25-2018, 11:15 AM

Thanks, I have 2-1/2" dropped spindles and 2" CPP lowering springs up front.

04-16-2018, 08:57 AM	#1
mbzaungst Registered User Join Date: Jan 2014 Location: Wacousta, Mich Posts: 90	2" block with 4" drop spring in the rear?? Any issues running a 2 inch block with a 4 inch drop spring? I am planning to move shocks as well? Thanks for the help

04-16-2018, 09:03 AM	#2
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: 2" block with 4" drop spring in the rear?? None that wouldn't exist from only running the blocks. That lowers your scrub point by the block size, but only the trailing arms. My friend/neighbor built this truck with 4" drop f & r and decided to level it out with 2" blocks EDIT: Now that I think about it, this would be before the block when the bed was first installed. He also put Vette rallyes on with other tires, but no pictures. But it worked out fine for him. Only picture I have Attached Images __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ Last edited by special-K; 04-16-2018 at 09:09 AM.

04-16-2018, 09:42 AM	#3
RustyBucket Registered User Join Date: Jul 2009 Location: Space Coast, Fl. Posts: 1,050	Re: 2" block with 4" drop spring in the rear?? I have 4" springs and a 1" block.... relocated short shocks & adj. panhard bar. Rides/drives pretty good. Picture is with worn 255/60's, replaced w/ 275/60's recently. Attached Images __________________ Dad always said, "Son, WISH IN ONE HAND, and ......." -------------------------------------- -------------------------------------- Current toy trucks: '71 GMC 1500 SUPER CUSTOM short/step, orig. dk. blue, 350/700r, ps,pb, A/C '72 Blazer 2wd, ochre & white, 454, tremecTKO 500 5spd. ps, pb, A/C, tilt Last 10yrs of hobby vehicles, had a FEW more in the 50yrs. before these: '66 Plymouth Belvedere City of Miami cop car clone. '70 Nova 406"sb, 13.5-1, solid roller, Brodix, p.glide/t.brake, back halved, 9" Ford, spool 4.88, cage,ladder bar/coilover, 10.5 tire....... SOLD!! '67 C10 short/step side mount spare -- SOLD!! '72 Jimmy 2wd, 350/350, ps, pb, fun driver, lots of bondo & a shiny red paint job..... SOLD!! '69 Nova 350, 4spd, A/C, ps, p.b, ...SOLD!! Last edited by RustyBucket; 04-16-2018 at 09:43 AM. Reason: typoo

04-24-2018, 08:25 PM	#4
CC69Rat Registered User Join Date: Jan 2011 Location: Chattanooga TN Posts: 6,210	Re: 2" block with 4" drop spring in the rear?? This is going to sound stupid -- but bear with me. Lets say a 200lb man jumps on a 12ft diving board. Boing, splash, he's in the water. Can you imagine how much the 12ft board would flex ? ( Just in your mind ) Now, cut 2ft off the board. Same dude.. boing, splash .. Did the diving board flex more or less at 12ft, vs 10ft ? Coils work the same way. All it is is a straight piece of wire that has been coiled up to create torsional rigidity. So, for a better ride quality you need a softer spring, less rigid and longer travel, right? A shorter stiffer spring will impact your ride quality. So, if I could make a suggestion, I'd do a 4" spring drop and 2" block yes, and you would have any problems with it. Just saying, dont do 6" drop springs (all springs) the 4 / 2 will ride a little better. Make real sure you adjust the pinion angle too or you'll be having driveline vibrations. 3 maybe 4 degree shims on top of your drop blocks, or CPP sells the drop blocks with the pinion adjustment already in them. you want to roll the nose of the pinion back up toward the bed floor. If you shim it, put the larger end toward the cab, smaller end toward the rear bumper. __________________ Chad 1967 C10 SWB - Project Savannah - 6.0/4L80 Currently underway 1968 C10 SWB - TOTY 2018, 50th Anniversary Tribute Project * Sold * Pride and Joy 1986 Silverado Short Fleet - Scarlet Sold 1985 Silverado Short Fleet Sold 2022 Jeep Gladiator Mojave 2001 Jeep Cherokee XJ 4x4 - Lifted, Built 1992 Jeep Cherokee XJ 4x4 - Lifted 2013 Honda Accord EX-L v6 Coupe 6spd (wife's ride)

04-25-2018, 07:57 AM	#5
1badmonza Registered User Join Date: Sep 2017 Location: Sulphur, Louisiana Posts: 42	Re: 2" block with 4" drop spring in the rear?? I got 2" blocks with 5" Drop CPP springs. I did C-Notch the frame to increase clearance because I only had about 1" between rearend tube and frame. Truck rides great still. IMG_1386 by Mike Lanclos, on Flickr IMG_1336 by Mike Lanclos, on Flickr __________________ 1968 C10, 5.3 with 4L60, 2600 Circle D converter, all CPP suspension with big brakes, 4.5-7 drop, 20" Billet Specialties Vintec wheels all around, AC with Jam and ready to CRUISE!

04-25-2018, 11:15 AM	#7
1badmonza Registered User Join Date: Sep 2017 Location: Sulphur, Louisiana Posts: 42	Re: 2" block with 4" drop spring in the rear?? Thanks, I have 2-1/2" dropped spindles and 2" CPP lowering springs up front. __________________ 1968 C10, 5.3 with 4L60, 2600 Circle D converter, all CPP suspension with big brakes, 4.5-7 drop, 20" Billet Specialties Vintec wheels all around, AC with Jam and ready to CRUISE!

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