New Y-block Street Build Dyno Results


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By luelui57 - 9 Years Ago
Just got the dyno result on the 292-318 from John Mummert.
10 to 1 compression Isky cam 228-228 @50 500 lift stock Mummert heads and intake 1.7 roller rockers 680 Quick fuel vacuum carb.
414 HP @ 5700  405 torque A nice strong Y-block for the 57 Ranchero
By slumlord444 - 9 Years Ago

When I first started running Y Blocks back in 1963 getting 400 horsepower out of a street Y Block seemed impossible. Hope mine does that well. With similar parts it should be in that ballpark. Nice ballpark to be in.
By luelui57 - 9 Years Ago
I have had the 57 for over 40 years but this is the first Y-Block. It has had a variety of FE 'engines from 352 to the last which was a 482 cubic inch aluminum FE. Just time to get back to a more traditional setup.
By Ted - 9 Years Ago
Great numbers.  That essentially doubles the factory rated horsepower numbers for the 292 equipped Rancheros which is going to bring a big smile when you step down on the throttle.
By Genuinerod - 9 Years Ago
What pistons did you use?  I have about the same setup for my next build, except for the bore/stroke.  I bought the 338" kit from Mummert and it came with the dome pistons.  It would be fine for the iron head engine but I'm not sure it would be good for the aluminum head engine. 
By scicala - 9 Years Ago
Luelui57,

  You're Y-Block sounds awesome !
 
     Sal
By luelui57 - 9 Years Ago
The shortblock pics show flat tops with reliefs  I don't know the brand  they are forged tho
By luelui57 - 9 Years Ago
Thanks Sal  it should ship out to me next week.
By PF Arcand - 9 Years Ago
Re the Camshaft. Is that the Y-280-1-111 cam?  If so, (?) your engine is the 2nd or 3rd results published by Mummert with that cam. All very impressive, both in H.P & torque figures & the bonus is they are achieved at very moderate RPM's.