I did a search for this and couldn't find any answers. We have a windsor based 427 built around a Dart block. For more details and a dyno chart go
here . We are obviously quite happy with the outcome of this engine, but now that winter is more or less here (damn michigan!) and we're not driving it we are looking over the combo with a finetooth comb. A part that we seem to be questioning is the Victor Jr. intake manifold. There are two major concerns.
First, is this 351w manifold designed with a 351ci engine in mind? If so, is running this on a 427 a bad move?
Second, the rev limiter is set a 6,400 rpm. The Vic Jr. 351w powerband is advertised at 3500-7500. Is this mismatch a possible problem??
These two issues seem to potentially counteract each other if both my above assumptions are correct. Feeding a 351 at 7500 is hardley the same as feeding a 427 at 7500 rpm so maybe this manifold is a good choice for our combo. Also, as you can tell from the linked dyno chart, the Hp never peaked. The funding party in this project is a little nervous about going any higher with it rpm wise, so we are trying to get the peak down into our powerband without changing anything drastic. Not that we need anymore low end torque or better driveability, just maybe some more average HP between say 2000rpm and our 6400rpm redline would be nice if possible.
Anyone care to offer an opinion on this one way or another??
How about any other manifold suggestions for this combo???
Intake Manifold Suggestions For 351w Based 427
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