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Post by tyler1121 on Sept 11, 2007 8:11:27 GMT -5
All of these companies talk about rear blocks for lift. I was wondering if I could put blocks on the front of my 85 as well for lift?
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Post by DeadlyPeace on Sept 11, 2007 9:29:54 GMT -5
NO!
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Post by fourwd1 on Sept 11, 2007 10:32:33 GMT -5
NO, NO !!
They create very un-safe conditions when used on the front axle.
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Post by 81 tuff truck on Sept 13, 2007 1:02:10 GMT -5
no no no no no no no!!!!!!!!!!!!
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Post by kysavage on Sept 13, 2007 5:40:53 GMT -5
^^What they said!!^^ Blocks in the front would be a big no no.......
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Post by tyler1121 on Sept 13, 2007 18:05:33 GMT -5
ok thanks guys
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Post by myexonenine on Sept 15, 2007 6:58:14 GMT -5
why put them in the rear then? why in the front so dangerous?
I may sound like a noob, prolly because I am.
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Post by 94cnytoy on Sept 15, 2007 8:04:48 GMT -5
"why put them in the rear then? why in the front so dangerous?
"
They really aren't recommended for the rear either unless smaller than 4''.
In the rear, taller blocks will cause axle hop. The leverage generated from the distance from the leaf spring surface to the axle mounting point works against the design of a leaf spring.
Leaf springs are designed to work in an up/down format with VERY little arc ( one end has to give a little to allow vertical movement hence the shackles.)
When you put space between the axle and leaf spring, driveline torque is trying to rotate the axle housing, which is now easier because the block or spacer acts as leverage. This will actually bend the spring back ( or under ) creating massive amounts of sping preload which then gets forced to the weakest link ( traction of the tire itself, causing it to skip or hop on whatever surface you may be on.
While this seens real nasty on the rear end, it is mostly straight line movement. When you consider these stresses on the front end, you now have the additional forces of steering and body roll into the mixture. The forces are and can be so great, they will cold roll the block surfaces over and eventually spit the blocks right out from between the axle and leaf springs.
Bad examples, but you will see front blocks on heavy commercial vehicles. The only reason they can get away with this design is due to the fact that the springs are Sooooo heavy and resilient to movement the will not twist.
On the smaller scale, light weight 1/2 ton trucks will come factory with 1/2'' to 2'' blocks in the rear. The rear springs are light, but can handle a little extra leverage without preloading and twisting.
You will see factory 1 ton trucks with up to 4-1/2'' blocks because the rear leafs are so heavy they don't twist like the heavy commercials.
Hope I helped without being to confusing.....
Just remember one thing.
NO
Stew
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Post by norcalyota on Sept 15, 2007 11:58:20 GMT -5
Putting blocks in the front of a truck is similar to going commando on a daily basis. You can get away with it for a while, but eventually something bad is gonna happen!
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Post by Sean on Sept 15, 2007 15:30:17 GMT -5
Its pretty simple. If you puke a block out of the rear you dont lose your steering.
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Post by bowshtr on Sept 15, 2007 16:55:24 GMT -5
HAHA...Dont do it dude!
When i was doing my SAS i was in and out of Napa pretty regularly for brake line fittings and misc stuff. Well this one guy at the counter was like what are you building, so i told him my project and he was like you ought to check out my old waggy. He was all sorts of excited about his "rig" so we went out behind the store and there sits an old amc rust bucket on like 35's or something. I was like thats pretty cool man you dont see many of these on teh street and i wasn't going to downplay his junk until i saw he had not 1, not 2, not 3, but 4 inch blocks under his front spring packs. And all i said was good luck dude and heres my number, call me when your gonna be out on the road with that thing cause i dont want to be anywhere near that tank when things let loose.
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Post by 94cnytoy on Sept 16, 2007 13:05:11 GMT -5
PPS:
Thanks, because at least once a year, we all need to vent a little about the dangers of front blocks ( and the dangers of half-assed home made suspension or steering for that matter ).
We are all here to help you and help each other have fun and be safe for yourself and the safety of others.
Stew
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Post by jacksh002 on Sept 29, 2007 0:35:34 GMT -5
just thought i would add to this with a horror story, i saw a newer ford that comes with leaf sprung front solid axle, the 250's or something like that, and this guy had blocks front and rear, ladder bars in the back at least, but anyways, he was in the body shop... because, well he hit something and it basically ripped the axle out from under him and screwed a bunch of crap up in the process... axle, leafs, steering, as well as the body stuff..
but the mental midget cam out ahead because he got a real lift kit when it got fixed because the shop wouldn't stick blocks back up front and had to put it back the way it was in height and everything.. full coverage can be nice
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Post by fourwd1 on Sept 29, 2007 21:59:44 GMT -5
why put them in the rear then? why in the front so dangerous? I may sound like a noob, prolly because I am. OK, to answer your question, cause no one else has. + Blocks cause axle wrap. It's not to bad in the rear usually, but in the front, it will cause your truck to dart to one side or the other. Basically can lead to a somewhat uncontrollable vehicle. It's not safe, period. |
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Post by myexonenine on Oct 1, 2007 4:09:07 GMT -5
I think that answered the question, I'm guessing that no one has ever bothered to make ones that will work because there are a dozen other products that do the same job and are just safer to start with.
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Post by ToyotaMike on Oct 13, 2007 21:40:20 GMT -5
Yes they are called leaf springs and are fairly cheap
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Post by ediblecrayons03 on Oct 13, 2007 23:08:44 GMT -5
or shackles, but there ugly and will do nothing for your approach angle.
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Post by toycrawler on Oct 17, 2007 14:01:21 GMT -5
Putting blocks in the front of a truck is similar to going commando on a daily basis. You can get away with it for a while, but eventually something bad is gonna happen! well put!! oh yeah, and one more no, just for good measure.  |
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