Reply With QuoteWith no snails, I'd think you'd want to be real conservative in terms of overlap on whatever you choose.
Chris
Well after replacing everything else in this engine, I figure I might as well replace the cam so I know what's in it. Here's what it is.
18' flatbottom jet
390 FE ford
.060 over 9.6:1 KB hypereutectic flattops
stock valve springs and rockers
fresh Berk A
Edelbrock streetmaster 390 single plane intake
Holley 3310 750 vac sec
Pertronix in stock dist or Mallory Unilite (have both haven't made up my mind yet)
Edelbrock logs, no snails 2 7/8" tips.
Anyone have a good grind for an FE?
With no snails, I'd think you'd want to be real conservative in terms of overlap on whatever you choose.
Chris
True. On the 460, I thought I was conservative with a cam with 234*@ .050, but I'm thinking the 390 should have a little less duration than that. I've been told to keep the gross lift under .550, so that limits the grinds available also.
234* @ .050 is just fine in my opinion for a decent duration. but thats not what you need to worry about with water reversion. choose a cam profile with a higher intake to exhaust lobe separation angle. no less than 112 and i would go with maybe a little more, 114 or 115. i would even go with a little less duration and lift and keep the rpms down lower. 218 - 224 duration with 510 lift. with a fresh "A" cut impeller and a standard performance build on the engine components, id want to keep the rpms down low and use the torque curve to your advantage. just my $.02
Which heads are on the motor, Roost?
LO
p.s. Thanks again for the roar down the public highways with the zoomies in the roadster.
It has the C1AE big port heads. My pleasure on the little putt down the street. Any time you're in area, come on by. http://www.roostwear.com/forum/image...on_burnout.gif
I checked with Clay Smith and George recommends his H300 cam 244@.050 and a .560 lift. Didn't get the overlap. Seems a bit stout to me. He was a little concerned about compression being at 9.6:1, but should handle it with 91 octane.
The last cam I ran in my 390 came from cam technics and was pretty big. I had 427 medium risers on the motor. Pistons and block were releaved for the valve clearence.
erson tq 20 my uncle had that cam in his old glasstron jet said it pulled all the way to 3800 rpm well thats all it turned with a jacuzzi you can order it through summit
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