Front Shackle Angle Q's - The 1947 - Present Chevrolet & GMC Truck Message Board Network

74CustomK20 · 01-09-2016, 05:51 PM

Alright everyone this is the front shackle of my k30 frame. Is this going to be good once I get the weight of my body engine etc etc on it, or will it bottom out and hit the frame first? What do I need to do if this is wrong? Help!

nvrenuf · 01-09-2016, 07:17 PM

I don't see a pic (but I barely have a signal right now).

74CustomK20 · 01-09-2016, 07:27 PM

It's not loading the pics, and I have no idea why. I'm on wifi and have 4G as well... hmm... know the pics not that big either...

74CustomK20 · 01-09-2016, 07:54 PM

More

324matt · 01-09-2016, 10:07 PM

your front springs look too long. Are those the original shackels? I have the ORD front Shackles and they are almost verticle. I think your going to hit the frame

74CustomK20 · 01-09-2016, 10:09 PM

Those are 52's out of a 1989 k20. And 7.25" or shackles.

324matt · 01-09-2016, 10:15 PM

um, assuming that you mean 52's (rear leaf springs) out of a 1989 k20, there is your problem. they are too long. your definately going to hit the frame. You need the correct spring length, as well as the correct spring height.

74CustomK20 · 01-09-2016, 10:18 PM

My bad 324matt. I forgot to add that I'm doing the b52" spring swap.

324matt · 01-09-2016, 10:20 PM

looking at your bottom photo, I can tell that they are rear leaf springs from the thick bottom flat spring in the spring pack. Front springs are narrower and much shorter that rear leaf springs. Im not saying that what you are doing cannot be accomplished, but, There is such a thing as the mysterious "death wobble". You would be miles ahead to have your original springs re-arched, or add the ORD 1" zero rate spring in the front, or buy the correct springs.

324matt · 01-09-2016, 10:24 PM

read this thread. there is some good info on what your trying to do and it has great pics!

http://www.pirate4x4.com/forum/chevy...-question.html

74CustomK20 · 01-09-2016, 10:36 PM

Trying to do thr 52" spring swap, and also achieve more flex. My superlift 8" springa are MUCH MUCH too stiff and are like a log truck.

74CustomK20 · 01-09-2016, 11:21 PM

Thoughts, as my 52's are staying. If my suspension droops, it'll straighten the shackle out... so ok there. But compression is my concern. If I put my mount back In the original spot won't that put the mount FACING forward, and will give me much much more room to compress when I soak up bumps?

nvrenuf · 01-10-2016, 01:54 AM

It's always hard to tell with no weight on the chassis but the springs will flatten out some so the shackle will move back. That said, I started with 7.25" shackles and they had my caster all wacked out causing death wobble. I swapped to 6" shackles and brought my caster back into spec and the angle is still good.

I'd probably hold off on any more changes until you get at least most of the weight on it but I bet a short shackle is the answer.

74CustomK20 · 01-10-2016, 02:58 AM

The thoughts are, as it compresses, it will only go as far back (bottom of shackle) until the spring flattens. Once it goes past that the spring will negative arch and the shackle will come back away from the frame right?

01-09-2016, 05:51 PM	#1
74CustomK20 Registered User Join Date: Oct 2014 Location: Tell City, IN Posts: 637	Front Shackle Angle Q's Alright everyone this is the front shackle of my k30 frame. Is this going to be good once I get the weight of my body engine etc etc on it, or will it bottom out and hit the frame first? What do I need to do if this is wrong? Help! __________________ Big Nate Carp. Local 224. Buy made in the USA! 03 F350 6.0 Daily Race Truck. 79 C70 366 Project Dump.

01-09-2016, 07:17 PM	#2
nvrenuf Registered User Join Date: May 2005 Location: Mobile, Al Posts: 92	Re: Front Shackle Angle Q's I don't see a pic (but I barely have a signal right now). __________________ John '91 Blazer, full top, bbc, 4spd, Doubler, 1 tons, 40's

01-09-2016, 07:27 PM	#3
74CustomK20 Registered User Join Date: Oct 2014 Location: Tell City, IN Posts: 637	Re: Front Shackle Angle Q's It's not loading the pics, and I have no idea why. I'm on wifi and have 4G as well... hmm... know the pics not that big either... Attached Images __________________ Big Nate Carp. Local 224. Buy made in the USA! 03 F350 6.0 Daily Race Truck. 79 C70 366 Project Dump.

01-09-2016, 07:54 PM	#4
74CustomK20 Registered User Join Date: Oct 2014 Location: Tell City, IN Posts: 637	Re: Front Shackle Angle Q's More Attached Images __________________ Big Nate Carp. Local 224. Buy made in the USA! 03 F350 6.0 Daily Race Truck. 79 C70 366 Project Dump.

01-09-2016, 10:07 PM	#5
324matt Registered User Join Date: Oct 2011 Location: Prarietown IL Posts: 118	Re: Front Shackle Angle Q's your front springs look too long. Are those the original shackels? I have the ORD front Shackles and they are almost verticle. I think your going to hit the frame __________________ 1985 GMC K2500. 350/TH400/208. 4:10's. stock. 1987 Chevy V30. 454/TH400/205 4:10's. Stock SOLD.

01-09-2016, 10:09 PM	#6
74CustomK20 Registered User Join Date: Oct 2014 Location: Tell City, IN Posts: 637	Re: Front Shackle Angle Q's Those are 52's out of a 1989 k20. And 7.25" or shackles. __________________ Big Nate Carp. Local 224. Buy made in the USA! 03 F350 6.0 Daily Race Truck. 79 C70 366 Project Dump.

01-09-2016, 10:15 PM	#7
324matt Registered User Join Date: Oct 2011 Location: Prarietown IL Posts: 118	Re: Front Shackle Angle Q's um, assuming that you mean 52's (rear leaf springs) out of a 1989 k20, there is your problem. they are too long. your definately going to hit the frame. You need the correct spring length, as well as the correct spring height. __________________ 1985 GMC K2500. 350/TH400/208. 4:10's. stock. 1987 Chevy V30. 454/TH400/205 4:10's. Stock SOLD.

01-09-2016, 10:18 PM	#8
74CustomK20 Registered User Join Date: Oct 2014 Location: Tell City, IN Posts: 637	Re: Front Shackle Angle Q's My bad 324matt. I forgot to add that I'm doing the b52" spring swap. __________________ Big Nate Carp. Local 224. Buy made in the USA! 03 F350 6.0 Daily Race Truck. 79 C70 366 Project Dump.

01-09-2016, 10:20 PM	#9
324matt Registered User Join Date: Oct 2011 Location: Prarietown IL Posts: 118	Re: Front Shackle Angle Q's looking at your bottom photo, I can tell that they are rear leaf springs from the thick bottom flat spring in the spring pack. Front springs are narrower and much shorter that rear leaf springs. Im not saying that what you are doing cannot be accomplished, but, There is such a thing as the mysterious "death wobble". You would be miles ahead to have your original springs re-arched, or add the ORD 1" zero rate spring in the front, or buy the correct springs. __________________ 1985 GMC K2500. 350/TH400/208. 4:10's. stock. 1987 Chevy V30. 454/TH400/205 4:10's. Stock SOLD.

01-09-2016, 10:24 PM	#10
324matt Registered User Join Date: Oct 2011 Location: Prarietown IL Posts: 118	Re: Front Shackle Angle Q's read this thread. there is some good info on what your trying to do and it has great pics! http://www.pirate4x4.com/forum/chevy...-question.html __________________ 1985 GMC K2500. 350/TH400/208. 4:10's. stock. 1987 Chevy V30. 454/TH400/205 4:10's. Stock SOLD.

01-09-2016, 10:36 PM	#11
74CustomK20 Registered User Join Date: Oct 2014 Location: Tell City, IN Posts: 637	Re: Front Shackle Angle Q's Trying to do thr 52" spring swap, and also achieve more flex. My superlift 8" springa are MUCH MUCH too stiff and are like a log truck. __________________ Big Nate Carp. Local 224. Buy made in the USA! 03 F350 6.0 Daily Race Truck. 79 C70 366 Project Dump.

01-09-2016, 11:21 PM	#12
74CustomK20 Registered User Join Date: Oct 2014 Location: Tell City, IN Posts: 637	Re: Front Shackle Angle Q's Thoughts, as my 52's are staying. If my suspension droops, it'll straighten the shackle out... so ok there. But compression is my concern. If I put my mount back In the original spot won't that put the mount FACING forward, and will give me much much more room to compress when I soak up bumps? __________________ Big Nate Carp. Local 224. Buy made in the USA! 03 F350 6.0 Daily Race Truck. 79 C70 366 Project Dump.

01-10-2016, 01:54 AM	#13
nvrenuf Registered User Join Date: May 2005 Location: Mobile, Al Posts: 92	Re: Front Shackle Angle Q's It's always hard to tell with no weight on the chassis but the springs will flatten out some so the shackle will move back. That said, I started with 7.25" shackles and they had my caster all wacked out causing death wobble. I swapped to 6" shackles and brought my caster back into spec and the angle is still good. I'd probably hold off on any more changes until you get at least most of the weight on it but I bet a short shackle is the answer. __________________ John '91 Blazer, full top, bbc, 4spd, Doubler, 1 tons, 40's

01-10-2016, 02:58 AM	#14
74CustomK20 Registered User Join Date: Oct 2014 Location: Tell City, IN Posts: 637	Re: Front Shackle Angle Q's The thoughts are, as it compresses, it will only go as far back (bottom of shackle) until the spring flattens. Once it goes past that the spring will negative arch and the shackle will come back away from the frame right? __________________ Big Nate Carp. Local 224. Buy made in the USA! 03 F350 6.0 Daily Race Truck. 79 C70 366 Project Dump.



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