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Author Topic:   Head Question
Dirt Forum Racer

Total posts: 88
posted November 20, 2005 05:21 PM  
All other things being equal - what kind of power difference am I looking at between these two head combinations:

1. GM Vortec heads all stock, limited to .450 lift cam. Cam would be something like a .450/.453 lift cam with 242/255 duration at .050 and 293/300 advertised duration supposed to make power from 3000 to 6000 rpm.

2. Dart Iron Eagles, same cc as Vortecs (64), 180cc runners, good to quite a bit bigger lift so would be looking at something in the .500~.515 range.

These two combos would be on a 350, 9.5:1, that would turn most all of it's life between 5000 & 6000 rpm. Price wise the vortecs are around $520 a set and the Iron Eagles are going to be around $850 a set so just wondering how much more power it would really be making. Thanks.

nine finger
Dirt Forum Racer

Total posts: 80
posted November 20, 2005 06:49 PM  
im doing a set of vortech for a friend and will be buying a seat & guide cutter for the same. there is plenty of guide to machine can probably get clearance for .600 lift.i will let you know

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