Quote:
Originally Posted by Cliff R
The T-II, Street Dominator and Tomahawk require a 1" where the RPM does not. If you try to test one of those single plane intakes w/o a spacer you are probably going to get your feeling hurt. Well, at least on any 455 or larger build capable of making over 500hp or so. Adding spacers to the RPM is hit and miss. They typically do NOT like fully open or 4 holes spacers. The best I've tested on them to date were fully divided or semi-open (allowing the rear openings to see a good bit of each other).
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So far everytime i have tried spacers on a rpm the engine responded very very well (both 400 and 455), open spacers has worked great for me.