Quote:
Originally Posted by rohrt
I forget who told me to avoid BMR. They are cheaper for a reason. I think it was Marcus with Savitske. He is gone now after trying to steal people's Money, but was a wealth of knowledge for many years. There were a few reported issues with the weld quality or something like that. Same reports with the cheap ebay arms out of China too.
I put SPC on two of my cars. One is not on the road yet and for the other I can't really tell the difference but they were the right choice for me for a few reasons. They are also a bit of a PITA to install. I don't like that they don't have a bump stop, are held in by the shock and are a pain to adjust for most alignment shops.. On the flip side they are adjustable and you don't need a shim stack. I like JLMounce summation of the arms. too
I created a spreadheet of arms for myself, reading up on all the different top quality arms. Not a lot of price difference in the end. What I was looking for was if the arms have geometry change in them. Some are fully stock replacements. Some are better for the tall ball joint. Some have added caster in only the uppers and some have added caster in the uppers and lowers to help keep the tire centered in the wheel well.
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Just a clarification here. SPC lower arms do have bump stops. You can either use the factory style rubber bump stops, or more preferably, you run the SPC jounce bumpers.
The upper arms do not contain a droop stop. This is typically not an issue on street cars, or cars that see auto-x and road course work. It can be an issue for drag cars that are able to pull the tires on launch. In that situation SPC does state in their instructions that use of a travel limiter is required.
SPC arms would not be the arms I would recommend for any serious effort drag car.