2.5/4 currently, but wanting to go lower ?'s - The 1947 - Present Chevrolet & GMC Truck Message Board Network

my67chevytruck · 03-11-2010, 11:44 AM

Hello,

we are currently running 2.5 ECE drop spindles with BBC springs on my sons '67 with a SBC. I spaced the fact that the parts truck was bbc. The rear is ECE 4" drop springs with shock relocators and adj. track bar. we are running 17x8 front and 17x9 rear rims.

I plan on installing some 2" drop front springs to bring it down some. My question was . should i install the 2" drop blocks i have, or go with 6" drop springs? was curious if any downside to running blocks, i know alot of ppl do though. any vibrations /known issues etc. to not run blocks. Will i be ok running the 4" spring, 2" drop block and reg. adj. trac bar, or would i need to upgrade to the super track bar?

Thanks.

VA72C10 · 03-11-2010, 11:51 AM

I believe you'd be perfectly fine with the blocks, but get some other (more qualified) opinions. I believe their only issue is scrub line issues with bagged trucks if a bag fails.

By the way, happy you're dropping it another 2" all the way around...will be PERFECT now

my67chevytruck · 03-11-2010, 11:53 AM

Thanks Jonathan, i was thinking i would be ok, but wanted somone more knowledgable than myself to give some opinions.

72BlckButy · 03-11-2010, 03:25 PM

I can only speak about the 6" drop spring but so far, zero vibration or issues related to the spring. Now... you know I won't have the kind of power to shift a ton of weight to the back wheels (:P) but you should be fine regardless of the type of rear drop.

Any possible failures due to torque on the rear blocks? I'm not as educated on blocks as other on the site... just my $.02 Heath.

my67chevytruck · 03-11-2010, 04:12 PM

Quote:

Originally Posted by 72BlckButy

I can only speak about the 6" drop spring but so far, zero vibration or issues related to the spring. Now... you know I won't have the kind of power to shift a ton of weight to the back wheels (:P) but you should be fine regardless of the type of rear drop.

Any possible failures due to torque on the rear blocks? I'm not as educated on blocks as other on the site... just my $.02 Heath.

Thanks Nate are you running an adj. panhard bar, or the super trackbar that attaches to the trailing arm?

72BlckButy · 03-11-2010, 04:20 PM

Failed to mention that Heath... basically I'm running everything in ECE's kit. (Supertrac bar, shock relocators, etc.) Excellent quailty parts as you know, everything fit together flawlessly.

*Shane* · 03-11-2010, 05:55 PM

an air bag has NOTHING to do with scrub line issues ... flat tires do.

i would not recommend a block larger than 1 1/2"

Tx Firefighter · 03-11-2010, 06:01 PM

Shane is on the right track. I personally will run 2 inch blocks, but you really need to eyeball the scrub line. Since you have 17 inch wheels you are that much safer on scrub line though.

I've run 6 inch spring and also 4 inch springs with 2 inch blocks, with no real discernible issues with either setup. For me, I run what I have if it will save me buying more parts. Heck, I wrote an FAQ a few years ago about building lowering blocks so you know I'm a fan of them.

69 longhorn · 03-11-2010, 09:13 PM

A 2 " block is pushin scrub line issues on a 15" wheel, but on the 17" wheel, I wouldnt worry about it. Up front (on the cheap), you can cut 1 full ring off the bottom of the coil, & it will get you about 2" of drop

crazyAL

*Shane* · 03-11-2010, 09:21 PM

17" wheel shouldn't have a problem ... sorry, I missed that part. <embarassed>

SCOTI · 03-11-2010, 09:24 PM

One benefit not yet mentioned about lowering blocks (for this application) is they allow additional drop w/o affecting the shock travel. 2" shorter coils out back will affect the shock travel. the shocks that work ok w/a 4" spring may bottom out sooner w/a 6" spring.

my67chevytruck · 03-11-2010, 11:21 PM

Quote:

Originally Posted by 69 longhorn

A 2 " block is pushin scrub line issues on a 15" wheel, but on the 17" wheel, I wouldnt worry about it. Up front (on the cheap), you can cut 1 full ring off the bottom of the coil, & it will get you about 2" of drop

crazyAL

Thanks, i have a set of 2 inch springs, so i will probably use those.

Quote:

Originally Posted by Tx Firefighter

Shane is on the right track. I personally will run 2 inch blocks, but you really need to eyeball the scrub line. Since you have 17 inch wheels you are that much safer on scrub line though.

I've run 6 inch spring and also 4 inch springs with 2 inch blocks, with no real discernible issues with either setup. For me, I run what I have if it will save me buying more parts. Heck, I wrote an FAQ a few years ago about building lowering blocks so you know I'm a fan of them.

Thanks Kevin, i just wanted some clarification

Quote:

Originally Posted by Shane

17" wheel shouldn't have a problem ... sorry, I missed that part. <embarassed>

No sweat Shane.....

Quote:

Originally Posted by SCOTI

One benefit not yet mentioned about lowering blocks (for this application) is they allow additional drop w/o affecting the shock travel. 2" shorter coils out back will affect the shock travel. the shocks that work ok w/a 4" spring may bottom out sooner w/a 6" spring.

Thanks Scoti...

Would i be ok running the regular adjustable track bar that goes from the frame to the axle, or would i need to upgrade to the super track that locates it from the frame to the trailing arm.....

SCOTI · 03-12-2010, 12:52 AM

Quote:

Originally Posted by my67chevytruck

Would i be ok running the regular adjustable track bar that goes from the frame to the axle, or would i need to upgrade to the super track that locates it from the frame to the trailing arm.....

A short bar technically would work. It would not be @ an optimum angle & the length would allow for more side shift per inch of travel vs. a full frame width 'super' style bar.

my67chevytruck · 03-12-2010, 08:03 AM

Ok , Thanks again guys !!!! i know what needs to be done now..

03-11-2010, 11:44 AM	#1
my67chevytruck Under Construction Join Date: Oct 2007 Location: Midlothian,TX (DFW) Posts: 4,555	2.5/4 currently, but wanting to go lower ?'s Hello, we are currently running 2.5 ECE drop spindles with BBC springs on my sons '67 with a SBC. I spaced the fact that the parts truck was bbc. The rear is ECE 4" drop springs with shock relocators and adj. track bar. we are running 17x8 front and 17x9 rear rims. I plan on installing some 2" drop front springs to bring it down some. My question was . should i install the 2" drop blocks i have, or go with 6" drop springs? was curious if any downside to running blocks, i know alot of ppl do though. any vibrations /known issues etc. to not run blocks. Will i be ok running the 4" spring, 2" drop block and reg. adj. trac bar, or would i need to upgrade to the super track bar? Thanks. __________________ Heath subscribe to the board here: http://67-72chevytrucks.com/vboard/payments.php http://67-72chevytrucks.com/vboard/s...d.php?t=157669 FAQ how to's 1956 Chevy Apache 1967 C10 SWB FleetSide (under construction) 1969 K10 SWB FleetSide (Future Build) 1972 C10 SWB Stepside (Future Build) 56 chevy truck : http://www.cardomain.com/ride/2955823/1 67 truck build: http://www.67-72chevytrucks.com/vboard/showthread.php?t=281357/1 69 k10: http://67-72chevytrucks.com/vboard/s...d.php?t=389470

03-11-2010, 11:51 AM	#2
VA72C10 VA72C10 Join Date: Mar 2008 Location: Midlothian, VA Posts: 25,267	Re: 2.5/4 currently, but wanting to go lower ?'s I believe you'd be perfectly fine with the blocks, but get some other (more qualified) opinions. I believe their only issue is scrub line issues with bagged trucks if a bag fails. By the way, happy you're dropping it another 2" all the way around...will be PERFECT now __________________ Looking for a 67-72 swb or blazer project in or around VA.

03-11-2010, 11:53 AM	#3
my67chevytruck Under Construction Join Date: Oct 2007 Location: Midlothian,TX (DFW) Posts: 4,555	Re: 2.5/4 currently, but wanting to go lower ?'s Thanks Jonathan, i was thinking i would be ok, but wanted somone more knowledgable than myself to give some opinions. __________________ Heath subscribe to the board here: http://67-72chevytrucks.com/vboard/payments.php http://67-72chevytrucks.com/vboard/s...d.php?t=157669 FAQ how to's 1956 Chevy Apache 1967 C10 SWB FleetSide (under construction) 1969 K10 SWB FleetSide (Future Build) 1972 C10 SWB Stepside (Future Build) 56 chevy truck : http://www.cardomain.com/ride/2955823/1 67 truck build: http://www.67-72chevytrucks.com/vboard/showthread.php?t=281357/1 69 k10: http://67-72chevytrucks.com/vboard/s...d.php?t=389470

03-11-2010, 03:25 PM	#4
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: 2.5/4 currently, but wanting to go lower ?'s I can only speak about the 6" drop spring but so far, zero vibration or issues related to the spring. Now... you know I won't have the kind of power to shift a ton of weight to the back wheels (:P) but you should be fine regardless of the type of rear drop. Any possible failures due to torque on the rear blocks? I'm not as educated on blocks as other on the site... just my $.02 Heath. __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

03-11-2010, 04:20 PM	#6
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: 2.5/4 currently, but wanting to go lower ?'s Failed to mention that Heath... basically I'm running everything in ECE's kit. (Supertrac bar, shock relocators, etc.) Excellent quailty parts as you know, everything fit together flawlessly. __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package) Last edited by 72BlckButy; 03-11-2010 at 04:21 PM.

03-11-2010, 05:55 PM	#7
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Re: 2.5/4 currently, but wanting to go lower ?'s an air bag has NOTHING to do with scrub line issues ... flat tires do. i would not recommend a block larger than 1 1/2"

03-11-2010, 06:01 PM	#8
Tx Firefighter Watch out for your cornhole ! Join Date: Jun 2003 Location: Azle, Texas Posts: 14,162	Re: 2.5/4 currently, but wanting to go lower ?'s Shane is on the right track. I personally will run 2 inch blocks, but you really need to eyeball the scrub line. Since you have 17 inch wheels you are that much safer on scrub line though. I've run 6 inch spring and also 4 inch springs with 2 inch blocks, with no real discernible issues with either setup. For me, I run what I have if it will save me buying more parts. Heck, I wrote an FAQ a few years ago about building lowering blocks so you know I'm a fan of them. __________________ I'm on the Instagram- @Gearhead_Kevin

03-11-2010, 09:13 PM	#9
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	Re: 2.5/4 currently, but wanting to go lower ?'s A 2 " block is pushin scrub line issues on a 15" wheel, but on the 17" wheel, I wouldnt worry about it. Up front (on the cheap), you can cut 1 full ring off the bottom of the coil, & it will get you about 2" of drop crazyAL __________________ http://community.webshots.com/user/hotrodhorn

03-11-2010, 09:21 PM	#10
Shane Account Suspended Join Date: Jun 2000 Location: over yonder Posts: 14,270	Re: 2.5/4 currently, but wanting to go lower ?'s 17" wheel shouldn't have a problem ... sorry, I missed that part. <embarassed>

03-11-2010, 09:24 PM	#11
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,094	Re: 2.5/4 currently, but wanting to go lower ?'s One benefit not yet mentioned about lowering blocks (for this application) is they allow additional drop w/o affecting the shock travel. 2" shorter coils out back will affect the shock travel. the shocks that work ok w/a 4" spring may bottom out sooner w/a 6" spring. __________________ 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.*

03-12-2010, 08:03 AM	#14
my67chevytruck Under Construction Join Date: Oct 2007 Location: Midlothian,TX (DFW) Posts: 4,555	Re: 2.5/4 currently, but wanting to go lower ?'s Ok , Thanks again guys !!!! i know what needs to be done now.. __________________ Heath subscribe to the board here: http://67-72chevytrucks.com/vboard/payments.php http://67-72chevytrucks.com/vboard/s...d.php?t=157669 FAQ how to's 1956 Chevy Apache 1967 C10 SWB FleetSide (under construction) 1969 K10 SWB FleetSide (Future Build) 1972 C10 SWB Stepside (Future Build) 56 chevy truck : http://www.cardomain.com/ride/2955823/1 67 truck build: http://www.67-72chevytrucks.com/vboard/showthread.php?t=281357/1 69 k10: http://67-72chevytrucks.com/vboard/s...d.php?t=389470



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