Originally posted by jung4g
OK, since I have a std, I have answers with experience.
The upper plate does help throttle response, but it also limits overall flow, remove it, by taking out the 2 screws and reset the ecu.
I've tried holding it open on my parents' DX Wagon and blipping the throttle, opening the throttle fast enough by hand causes the engine to bog really badly. I don't know how it would be driveable like that, the stock throttle response is bad enough.
Also, if you look at the IM, between it and the tb setup is a small black plastic plate. This is an air restrictor plate, remove the plate or bore it out because the stock std plate reduces the intake passage to 35mm down from the normal 47mm size. With the Dx cam, manifold, the plate removed, and the upper flipper, you'll be as fast as or faster than a DX. wooohooo!!
I think we'll take a look at this.
You don't need the dx rockers though, just put the dx cam in and do a valve adjustment. Better yet, buy a Si cam and you'll be much happier, Personally I wouldn't even spend the time putting the Dx cam in. 1/2-3/4 hp at most... the manifolds have the main difference.
There were no Si models at the junkyard, the DX cam is in already. The lobes are visably taller. We did end up using the old rockers. It's running, but no valve adjustment yet.
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