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leaf springs- how to help them flex.

chino63

Oppan Gangnam Style
Joined
Jun 11, 2005
Messages
5,164
Location
Shingle Springs
i have been messing with hilux/bruiser chassis since i was a kid and love the look of the leaf springs but as we all know, they flex like crap. over time, usually in the early early a.m. i have managed to make them work a bit better than in their stock configuration. also (obviously), the wider the track width, the more leverage on the spring which equals more flex.

first things first, ditch the sleeve that goes between the bolt and the eye of the spring. this little thing is your enemy. without the sleeve there will be slightly more play than with the sleeve but i think it is well worth it considering the amount of flex you can get.
next, insert a bolt into the eye of the spring. take a pair of pliars or put it in a vice and crush the eye so it becomes an oval (top to bottom). be careful not to crush it too tight. you want the bolt to move freely in the now oval eye.
CIMG5798.jpg


the next step is the most beneficial to this modification. use a die grinder/dremel with a cut off wheel, a sander or a file and taper both sides of the spring. be careful not to get it too hot if using a grinder/dremel/sander or it could damage the spring and weaken it. also, be careful not to taper it too much either, because you want enough material at the top of the eye to maintain its strength.
CIMG5802.jpg


thats it, quick and easy! now the only thing you have to worry about it over flexing the spring. i am using these in the front of my scaler with all 3 leaves and it flexes better than the unmodified ones with only one leaf. less likely to bend the leaves into pretzels now too.

here is an example of the difference between stock and modified.
stock:
CIMG5807.jpg


modified:
CIMG5809.jpg


post up your results and let me know if this works out for you or if i'm just imagining things.
 
i have them on the front of the scaler and all the way around on my hilux. i will get some pics as soon as i can. but now, i am being summoned to the couch for a chick flick.:-(
 
ColquittCustom405 said:
Chino nice info man,how does the integrity of the metal hold up?

so far so good. i have mine limited by bruiser shocks though, just to prolong the life of the spring. i had some concerns with the spring eyes opening up over time but no issues during inspection time (usually after 2-3 outings using 3 packs through the day). if you use longer shocks i suppose the spring life will be shorter. i wish these things were a higher quality spring steel.

here are some pics with the shocks disconnected. 8.5" track width outside sidewall to outside sidewall, tlt axles, bruiser chassis. granted, the rear is linked but check out the angle between the front skid and the tierod.:shock: twice as much as before the mod!
CIMG5810.jpg


CIMG5811.jpg


CIMG5812.jpg
 
Last edited:
not much leverage with the 8.5 track width. i wonder how much more you could get out of a 10.5" track width or on a bruiser axle. anyhow, i am happy with it.
 
1BadJeepBruiser said:
Trekker is now being torn down Spring mod and half link mod up front must obtain serious flex....

1BJB Out

Okay Mike will be busy for awhile.I need to post some progress pics of TMA Chino's wwwwwway ahead me.Nice flex Chino looks better without shocks.
 
I'm not getting that much flex out of the front Chino! Damn Though I need to work the springs a bit though. I may taper the eye a bit more too. This mod works awesome, great write up.
 
Fordx4 said:
thats a great write up chino63!!....would it work on a hilift??

the only thing with the hilift springs or jugg springs is the amount of arch. the bruiser springs are relatively flat and will flex better (like a 1:1) than the others. you can always dearch them a bit though. i say try it and see how it works.
 
Great job Chino, you should update the first post with any additional info on leaf springs and ask Mike to make it a sticky. Im sure you have tons of tech to share about leaf springs. Great job "thumbsup"
 
Nluvwithxlr8ing said:
Great job Chino, you should update the first post with any additional info on leaf springs and ask Mike to make it a sticky. Im sure you have tons of tech to share about leaf springs. Great job "thumbsup"

If chino gives me the OK I will add it to the scale tips and tricks post..but since its his idea I will wait to here an OK from him.
 
1BadJeepBruiser said:
If chino gives me the OK I will add it to the scale tips and tricks post..but since its his idea I will wait to here an OK from him.

sounds good to me mike. thanks!

here are some pics of the hilux to add. not near as much flex but the shocks are all still attached.
CIMG5822.jpg

CIMG5816.jpg

CIMG5815.jpg
 
this mod is worth a bump. I am using diaz leafs how much should you say I need to leave on the top to get some good flex without loosing strength?
 
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