That's pretty low compression for all motor.
What was the combo before these heads? Something is really not making sense here. It should make 310 WITH those heads and only 9.5:1.
Yeeeeeaaaaa.... (like bob's discount furniture) I DOUBT it.
depending on whether or not it was on a dynojet or a mustang dyno, i've seen some pretty big variation on the same car/same tune between them with some local guys' cars... i've heard the guys on sbf tech dot com talk about up to 20% difference in power readings between them
but 380 hp n/a on 306 cubes with insanely oversized heads and off the shelf cam sounds a little fishy
post dyno sheets and shut us all up
but 380 hp n/a on 306 cubes with insanely oversized heads and off the shelf cam sounds a little fishy
post dyno sheets and shut us all up
unfortunatly I am deployed right now and my dyno sheets aren't with me. I will concede that there are definitly variations on dynos, even same brand dyno side by side will vary considerably.
All I can give you is track times, it ran 11.1 @ 135 mph in the quarter at 3350lbs on a slipping clutch. The ET doesn't mean much because of the slipping clutch, but you can get the rough estimate on hp. 26 x 11.5 ET streets with 3:73 gears on a stock T5. I do have a copy of the slip in my photo album somewhere.
It was weighed at the time of the run @ Maple Grove
All I can give you is track times, it ran 11.1 @ 135 mph in the quarter at 3350lbs on a slipping clutch. The ET doesn't mean much because of the slipping clutch, but you can get the rough estimate on hp. 26 x 11.5 ET streets with 3:73 gears on a stock T5. I do have a copy of the slip in my photo album somewhere.
It was weighed at the time of the run @ Maple Grove
http://forums.stangnet.com/members/fford-albums-project-picture2744-dscf0005.html
this isn't the time slip I was talking about, this was the run just before it though, car 722
this isn't the time slip I was talking about, this was the run just before it though, car 722
I've gotta see the combo for that, because my 9.25:1 347 only made 362rwhp, and the guys at the shop were pretty impressed. Granted, i could have better heads and a different intake and carb and probably make 380+, i also have 45 extra cubes. 380rwhp with ANY 306 that isn't running 7500rpm is nearly unbelievable....i'd have to see the combo and dyno sheets on this one.
Fixed
It would have to be a very high compression very high revving setup to make those numbers.
So what combo did it make 310 with??