Cylinder head dyno shoot out

[NC Engine Builder]

It went into valve float at just past 5800, the cam was a custom grind, and had extremely aggressive lobes. I went back into the heads and lightend up the retainers, and worked on the geometry a bit more, but the short installed height was extremely difficult to get a spring that worked. It added rpm to the powerband, but it didn't get put back on the dyno, as the customer was in need of getting it in the car

 

[318willrun]

Here is another airflow limited dyno test of a oval track 360 I did 7 or 8 years ago. It's a .010 over zero deck stock stroke 360, with a .420! Lift hydraulic flat tappet cam (class rules) a set of EQ magnums, no porting allowed, but bunch of time spent on the valve job, a shitty edelbrock performer 318/360 (class rule again) and a 500 holley two barrel carburetor. 1 5/8 garbage headers.

View attachment 1716338953

Very impressive for the pieces used....

 

[rumblefish360]

1-3/4 dyno header. Don’t remember if it had an extension on it or not. Probably not.
Edited to add;
Just went back and checked the engine masters episode my engine was on, S6 E23 and it did have an extension on the header. Looks like about 18”.

“Power Nation”, not “Engine Masters.”

 

[TT5.9mag]

“Power Nation”, not “Engine Masters.”

Huh? Definitely engine masters, the tv show.

 

[NC Engine Builder]

And the plan will probably be to sell the shortblock after the dyno session, to try to at least recover some of the expenses associated with this experiment. And a few of the heads being discussed may also be up for sale also, but nothing concrete on that so far

 

[318willrun]

And the plan will probably be to sell the shortblock after the dyno session, to try to at least recover some of the expenses associated with this experiment. And a few of the heads being discussed may also be up for sale also, but nothing concrete on that so far

I was thinking of that yesterday. It would be a great way to recoup some of your efforts.

 

[Nat]

Yeah a stock baseline is moot I see that now. actually Nicks garage ran a stock 340 (or it looked stock) and I think he got 335 or 340 horse out of a pull. So I guess I'm saying it's already documented about what you could get in a stock configuration. So that leads to the question where would the starting point be? what configuration or setup?

before Nick got famous he made 390 hp 420 tq on a stock head 340 i have the dyno sheet somewhere , but it has been a long time and many engines back in 2010 before he made videos of every pull

 

[Cuda_Carl]

I’m lucky enough to have a set of x heads done by PRH. They are unbelievable.
Thanks again Dwayne!