performance cams... but STOCK exhaust cam?

[maytag]

Hey y'all:

I've read all over the forum about many of you using the stock exhaust cam in conjunction wiyth your 40/80 intake, (or even more aggressive). I think I understand the theory behind why you're doing so.... but has anyone actually dyno-proved the theory? I mean, has anyone tried their motor both ways? (with the stock exhaust and with the corresponding performance exhaust cams)

Somebody nutshell for me why y'all have found the stock exhaust cam to be a better choice? and under what circumstances would that no longer be true?

[131]

I'm in the process of building an engine that will have a mild cam on the intake and a stock cam on the exhaust. I don't see any point in doing the same with anything more than a mild intake cam. A 40/80 is going to need compression, carb and exhaust upgrades to get any real benefit, doing that with a stock exhaust cam is a waste of time, effort and money IMHO. The only reason I'm using different cams is because it's not a "low budget" build, it's a "no budget" build, mostly of bits I already had.

[AndyS]

I run a PBS cam on the intake, and a stock 1600 cam on the exhaust with adjustable pulleys and a ported head. works great. Made 100 HP at the tires on my 1800 engine with a 36mm DCD single weber with huge chokes in it. (28 primary, 29 secondary) car still idles nicely and has good bottom end as well. Great street set up. revs to 7000, pulls good from 2000 RPM.