Reply to "351C dyno project update"

> How goes the dyno project?

Still got a few things to finish up before the pulls begin.
I've been tied up working on my Triumph TR8 and Dave has been
finishing up some Pontiac big block work. I need to make
another trip down to drop off some additional intake manifolds
and the headers.

> Were you able to come up with a Port-O-Sonic?

Yes, I came up with a Port-O-Sonic for 2V heads.

> My Offy is a 2V that someone ported out to close to a 4v size.
> I think this effectively kills any taper the manifold might
> have had in it. What do you think?

If it was only ported near the cylinder head flange, I agree.
You need to port all the way down the intake to make any improvement.

> I was also wondering what you thought about the plenum in the
> Port-O-sonic where it has the recessed port dividers. This goes
> against all modern manifold designs.

I think that was an attempt to shorten up the longer runners but
I prefer the extended dividers, at least on taller intakes.

> I would prefer to run the offy as it is shorter than the torker
> more like a x-celerator. Just wondering what you thought.

The Torker will probably work better but the Offy is worth at test.
It's pretty easy to swap intakes on a 351C.

> If you have time feel free to have some port work done on my CHI's
> for a before and after comparison (I'll expect a discount on the
> cost of the work Big Grin).

I'll talk to Dave about it. Given your RPM range, I'd recommend
only modest port cleanup.

> Also, I still have a professionally rebuilt, refurbished and
> modded Holley Ford 4180 carb sitting in it's box from Pony Carbs
> should you be interested in adding that to the pile?
> Also an Offy DP 4V intake that you told me would help me see
> 40mpg on my Cleveland Cool

I've got a spreadbore 4V Dual Port and a square bore 2V Dual Port.
Mike Trusty thinks he has a square bore 2V Dual Port. I'll ping
him on it.

> Do you want me to ship any of this stuff over the pond?

I could use the Ford Holley 4180. I'd like to test it on
a stroker Rover V8.

Dan Jones