Cylinder head dyno shoot out

[PRH]

initial break in and dyno testing will be with a set of 100% stock speedmasters. No porting, no bowl cleanup, nothing but guide clearance checks.

I like it!!

 

[Dartswinger70]

We do, Uncle Tony!

I’ll show myself out..

Uncle Tony pfffft.....

 

[Amata Bene]

Are we waiting for results? Did the discussion move to a different thread....? Inquiring minds want to know.

 

[NC Engine Builder]

Are we waiting for results? Did the discussion move to a different thread....? Inquiring minds want to know.

@Earlie A is still prepping the heads to be tested, I'm covered up with customer work in the mean time

 

[Amata Bene]

@Earlie A is still prepping the heads to be tested, I'm covered up with customer work in the mean time

Thanks for the update. I'm real curious about the results because I've decided to use a set of SM heads on my 340 build stock stroke (for now) engine. As apposed to a set of J heads ported with 202's. Fingers crossed for good results. Side note: I know your not testing J's. I've got plenty of info on those.

 

[PRH]

@Earlie A is still prepping the heads to be tested, I'm covered up with customer work in the mean time

You guys are starting to get close to peak “dyno room misery index” season

 

[NC Engine Builder]

Thanks for the update. I'm real curious about the results because I've decided to use a set of SM heads on my 340 build stock stroke (for now) engine. As apposed to a set of J heads ported with 202's. Fingers crossed for good results. Side note: I know your not testing J's. I've got plenty of info on those.

A box stock speedmaster is probably a good improvement over any of the factory iron heads, unless ported professionally.