Discussion in 'Race 400/430/455' started by Jim Weise, Apr 2, 2017.
Looks like #13 is a deal breaker.
No billet heads permitted.
Well I guess there is only one remedy for that. One more thing to add to the list!
Dont ask dont tell.
Ya. I saw that after I posted the link. Wouldn't know why that would be an exclusion.They have a 632 outlaw class. That should mean anything goes.
Order solid chunks of cast aluminum to machine the heads out of, wouldn't that make them cast?
Interesting concept. They may need to define the "CAST" concept. It's not like a casting doesn't have to be machined to install seats, guides etc. If they think they are trying to save racers money, What happens when the motor blows up with a "cast" head, what ever that term means and you need to buy another head vs. repair a billet.
WOW!! ....Flippin WOW MAN!!!
Following to enjoy this progress...
If they don't specify what is considered "cast", that should be a legal "loophole" I would think? I didn't read the rules so don't go by what I say though.
Perhaps the outside shape can be sand casted then machined with your billets heads program? More than one way to skin a cat.
Not sure how much a chunk of cast aluminum would be, might even cost more than a billet chunk? But it would be less than developing a casting I would think. Hope this helps to be able to compete in that 632 Outlaw class. GL
So I just took a look at the rules and it says "no billet heads". They may consider a chunk of cast aluminum a "billet of cast aluminum"? So perhaps a sand casted version of the outside form of the head would be considered an actual
"casted head" that needs machining?
Not sure though, the rules are written very vague and if you ask they may say no? Might be better to just do it rather than ask?
A chunk of some sort of plastic or maybe wood machined to resemble your billet head to use as the pattern for sand casting your "cast" versions of your heads to make them legal would be fairly easy to do. An oven to melt aluminum and a sand casting station and you could make them yourself if there is enough call for them? Shouldn't be to hard to do, except that you'll need a lot of aluminum too pour at one time.
It seems they just want cheap parts to break or crack and leak. Anyway its on the list. I don't want to cast 1 set just for me, but then again I've spent more than a few dollars on the billet head that I originally designed just for JE SuperCat and me. We are having way too much fun too slow!
Ken, it'll be easy for the rule makers to frown on even a casting that goes into the CNC. Some billets are indeed cast, it's gray area on that.. I say find out, if you're interested!
I wouldnt worry about 632 right now. We have a LONG way to go yet to be competitive with those guys.
I have to say CONGRATULATIONS on what you've already done here.
And understanding that there is so much work to be done yet.
"Work done" can be not just months, but years.
Yeah have you ever seen a set of DRC2 or 3's I have a set. They will be CNC machined before any pro stock head geru ever touches the port which is about the size of a stock v6 exhaust port to begin with. I will be going to NHRA soon to get these heads approved or rejected for Nostalgia Top Fuel. They only told us we cannot change the valve angle so we didn't!
Alright.. back to reality here, lets look at some mockup pics..
For the first mockups, we will use Ken's raised cam block.. it features roller cam bearings and a 8620 core with Ford Nose, that Ken bought from a board member.. looks like LSM out in Michigan made the blank for that board member. Crane took the core and ground him up a big stick for his blower motor project.. .907/.848 lift (without lash consideration).
The white paper dots and white powder are left over after the block was digitized for the design process.
We utilized the ball in rocker style here, and of course, since I don't build Mopars, I didn't have the correct checking pushrod, so we winged it..
This is the Steel Exhaust rocker that most of you NA guys will never need.. thank goodness, they add 1K to the rocker cost. The sets with the Aluminum exhaust rockers are set to be delivered to me tomorrow.
Ken's purchased Comp cams .904 lifters for this deal, with centered cups, and it looks like we won't have any problem running that with the exhaust..
Intake was another thing, while we probably could run this, there is certainly worst out there...
We opted to get a .210 offset lifter from comp.. for the intake.
And of course I purchased the correct bucket style checking pushrod..
The offset lifter straightened things out nicely
And we like the location.. should have no trouble fitting in the larger diameter pushrods we will actually use.
So far, so good..
Very nice start.
ken..........enough of this 455 stuff.......when are you getting to the 350's? so we can beat the pants off these 455 guys. lol
anything new on these, dyno tests or the like?