Ported Magnum Heads, Pushrod Pinch Removed

[turboking15]

How many ingots did you use?, and what size were they? Thanks!

I want to say it was 4 or 5, i didnt do both heads at the same time and we used some for my buddies heads.

This is where i get mine from
Zamak ZA 12 Ingot (Aluminum 10.5%-11.5%, Copper 0.5-1.2%, Zinc Balance

 

[ch1ll]

In the mid 70’s Petty Enterprises mocked up a pair of heads for direct connection using polyester high heat epoxy plastic which eventually became the basis for w2 heads. I believe they flow tested them and ran them on an engine as well. Not sure how long that epoxy would hold up to heat cycling though.

 

[Wyrmrider]

IMHO Bob Mullen did the W2s or had a big hand in them
who did the first rockers?

 

[turboking15]

Update. Finished all the porting and drilled the intake flanges for the la pattern. Clearanced all the pushrod tunnels ad they were a best guess in the 1st place, so now nothing rubs. Also had to clearance the valve covers for the pushrods. Motor is now assembled with fresh 1121g gaskets and arp head studs. Also put an 850hp together last night. I have a 750hp, 850hp, and 830 annular carbs i will be trying out on this once its back in the truck.

 

[NC Engine Builder]

Extremely interesting!

 

[360duster]

cool stuff, lots of work.....hope it works as you expect, i think there´s some potential. I tried to remove some of the pinch at my buddies Mag-heads....broke into the intake runner. Since then i know about epoxy ;-)

Let us know how it works!

Michael

 

[turboking15]

Finally have these heads on a motor and running. SBE 5.9 mag, new bearings and rings, gapped for nitrous, arp rod bolts, .028 head gasket, cam is 242/248, .580/.580 110 lsa, m1 single plane welded to 4150 flange, 750dp carb, 1.75" primary 3" collector headers.

Trying to upload video, hold on

 

[RustyRatRod]

You got some crazy stupid badass hot roddin skills goin on here man. I love it.

 

[turboking15]

 

[12many]

Without before and after numbers from the same bench you are throwing darts at a dart board.

So regarding doing port work, the only way is to either have a flow bench, know how to use it, or have someone do the flow work or it’s just darts being thrown at a dart board period? BS. That really sounds like just another hard core racer pissing on the parade of someone on a different level than you. Some of you big time guys have to remember how you did things prior to benches, data loggers etc. One can research, read, study, use some common sense and see positive results. It has been done, it is still done.

 

[pittsburghracer]

So regarding doing port work, the only way is to either have a flow bench, know how to use it, or have someone do the flow work or it’s just darts being thrown at a dart board period? BS. That really sounds like just another hard core racer pissing on the parade of someone on a different level than you. Some of you big time guys have to remember how you did things prior to benches, data loggers etc. One can research, read, study, use some common sense and see positive results. It has been done, it is still done.

I’ll just say this. For 30 years I thought I knew how to port heads. Could I make things run half decent? Yes. But I didn’t know dog crap till I owned my 3rd flowbench.

 

[rumblefish360]

So, those without a flow bench don’t know jack then...

Hummmmm

 

[pittsburghracer]

So, those without a flow bench don’t know jack then...

Hummmmm

Did I say that?

 

[12many]

I’ll just say this. For 30 years I thought I knew how to port heads. Could I make things run half decent? Yes. But I didn’t know dog crap till I owned my 3rd flowbench.

Well you do engage in a little bit of racing from what I’ve read, maybe have driven off with a few people’s money here and there evenso “bench life” makes sense. I and surely many here dig reading and following along threads by guys with benches that do their own porting.....just as much as the guy without one, every level of porting from basic clean-up all the way to max efforts. Some interesting stuff done here

 

[pittsburghracer]

Well you do engage in a little bit of racing from what I’ve read, maybe have driven off with a few people’s money here and there evenso “bench life” makes sense. I and surely many here dig reading and following along threads by guys with benches that do their own porting.....just as much as the guy without one, every level of porting from basic clean-up all the way to max efforts. Some interesting stuff done here

My big problem is I lack math skills in a lot of areas. Two years of electronics in high school so I did learn how to apply that but to this day I’ve never measured port area. I’m basically doing the same or possibly a step better milking airspeed back and forth. So many dead spots in a port area would have helped me some but not where I wanted to be. Pictures which I try to share a lot of I think helps a few guys out.