To snub or Not to snub, that is the Question

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go300mph
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To snub or Not to snub, that is the Question

Postby go300mph » Tue Apr 08, 2008 4:35 pm

I have a 300 hp -1500 lb cobra replica with a ford 8.8 rear end, the upper control arms have been shortened to correct the differentials pinion angle to appprox 3 degrees downward in the front now when i stomp on it the axle will want to wrap due to the pinon climbing the ring gear however there is no way the pinion will reach a positive 3 degrees forward angle, this is due to the control arms limiting it's range? correct? Question do i need a pinion snubber or should reply on the control arms and the stock bushings to keep her with in limits?
What am i missing?
HELP
mick
Always Snug up the 'ol Anti-Submarine belt

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Billy Mac
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Postby Billy Mac » Tue Apr 08, 2008 6:34 pm

If the suspension is "basically" a 4-link, then the snubber "shouldn't" be necessary..
Sounds like a fun ride....Pictures are a requirement for participation in this forum, btw.....(LOL)
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Eric David Bru
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Postby Eric David Bru » Tue Apr 08, 2008 9:50 pm

Agreed.

3* down seems pretty steep to me... (?)

I always was taught to set my 4 links so that they were at 0* at ride height.

I could be wrong though... :o

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injected sidekick
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Postby injected sidekick » Tue Apr 08, 2008 11:03 pm

The standard suggested pinion angle is 1-3 degrees at ride height on a 4-link.

If you are a 4-linked ( not 4-bar w/poly bushings) with spherical heims the bars will not allow you positive pinion. I would try to split the diff between 1-3

If your on control arms/bushing I would saty on the bottom side of 2-3 degree and keep an eye on your bushing,when they start to buldge is an indication

Typically when adjusting your 4-link you will decide which bars (upper/lower) to adjust pinion angle and the opposite to adjust for baseline.

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go300mph
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Pics of Cobra

Postby go300mph » Wed Apr 09, 2008 11:42 am

Image


Image

Image
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go300mph
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Back to snubber

Postby go300mph » Wed Apr 09, 2008 11:45 am

just to confirm what i am reading , I have stock upper and lower control arms with stock bushings nd i shortened the uppers 1/2" to adjust pinion angle due to my tube chassis geometry being slightly off stock, Can i assume the 4 control arms will not allow the pinion to move positive?(up in front)
so a snubber is not needed?
mick
Always Snug up the 'ol Anti-Submarine belt

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Billy Mac
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Postby Billy Mac » Wed Apr 09, 2008 8:33 pm

the bars "shouldn't" allow the pinion to rotate...but the stock bushings may become "sloppy"......"I" recommend replacing those with some good, quality, neoprene bushings.
Nice pics, btw 8)
Long Live Draglist!
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In God we Trust...(all others pay cash)
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go300mph
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Postby go300mph » Wed Apr 09, 2008 9:34 pm

thanks for the input urethane bushings would be an easy fix for it even i can handle that one
mick
Always Snug up the 'ol Anti-Submarine belt


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