Clearances around the diff.....

[shan]

Hi guys,

Quick question....

I performed an LS upgrade on my 1968 Camaro. In order to get this on the road legally in my country, I need to install the carbon canister for fuel tank purging.

Anyways.....I felt the best place to install the carbon canister was in front of my Tanks Inc. fuel tank, right between the tank and the diff.
So the carbon canister sits in high and tight against the fuel tank. It sits in there fine, and I have made up brackets, shielding etc.....it's not pretty, but I have bolted it in.

However I stepped back after as I was installing and realise I am not 100% sure there is enough clearance from the back of the diff.

I know the diff can kick under load, with the pinion rising up, but I am not sure "how much" the diff can actually move backwards in a 4-link setup. This is not a drag car btw, aside from some spirted acceleration here and there, the car is just a cruiser. Not huge horsepower.

FYI - I have ridetech 4-link in the rear of my 1968 camaro.

So....

At the closest point, with spring under full load, I think I have around 40mm to 50mm between the Carbon Canister and diff....which is about 1.6 inches. See pics.

Am I too close?

[dhutton]

I would remove the coilover springs and cycle the suspension through its full travel.

There is not much pinion rotation with a four link. That generally happens due to spring wrap with leaf springs.

Don

[Mr Nick]

At the closest point, with spring under full load, I think I have around 40mm to 50mm between the Carbon Canister and diff....which is about 1.6 inches.


If you have 1.6" of clearance with the suspension truly bottomed out, I would say that's totally fine. If the rear end moves far back enough to make contact (or the body flexes somehow) then you have other problems.

Put a dab of chassis grease on the fins of the diff cover and drive it for a while, if the grease has not transferred to the carbon canister, you're good to go.