Power brake booster

[Truckedup]

The power brake booster in my 81 El Camino needs replacement.There's seems to be two models,a single booster and a tandem booster.How do you tell the difference? The one in my car,it's looks original,is 8 inches in diameter and about 5-1/2 inches thick.
And is there an advantage to using one or the other if they are interchangable? Thanks

 

[midwestls]

Bump

 

[pontiacman469]

Didn't know there was 2? :shock:

 

[midwestls]

Me either, was one vacuum assist like some other GM's?

 

[Lue]

Could it be that they made two kinds of booster one for V6 and the other for a V8? I'm not trying to high jack the thread, just thinking of what if.

 

[busdriver]

I believe that the dual diaphragm is smaller in diameter and a bit thicker front to back than the single diaphragm. The dual may give you a bit more valve cover room but I don't think there was much of a performance difference.

I have master w/booster set up in the garage that came off my 84 Cutlass, I went to a manual set-up, if your interested.