[john marcella]

Originally Posted by Aaron Quinton

Are you sure? I"m pretty sure I can keep up. And shouldn't you be teaching this? Why are you asking me? Or is the magic fading? LOL

Um yes to the 1st.
No, no, im really not , and nope. In that order

[Aaron Quinton]

You sure about that boss? I've been leading some 3V vs. 4V studies lately on a fairly large scale.

Originally Posted by john marcella

Um yes to the 1st.
No, no, im really not , and nope. In that order

[john marcella]

Originally Posted by Aaron Quinton

You sure about that boss? I've been leading some 3V vs. 4V studies lately on a fairly large scale.

I can sing a song, dont mean i do it well.

[steve25]

I need to correct my post number 7 as Tom Vaught was kind enough to jar my mind in the right direction.

What I posted about the 3 valve head was wrong, as it still had paired Intake runners like a normal production head, the duel OHC 421 had the Intake port layout that was starting to look like a RA5 was in the works!

[J.C.you]

Just conversation again, but just observation, a v head could be used to make a "poor boy " pushrod version multi valve head. Already a split port so to speak. Pushrod going through the port activates both intake valves. Would have to relocate a single exhaust valve towards the existing exhaust port. Exhaust lifter bore would have to be rotated some for a single exhaust valve.

[Half-Inch Stud]

So, in my thoughts, an OHC multi-valve gets rid of The Ram AIR V Pushrod sleeve.

[scott70]

Pics

[Aaron Quinton]

Touche bother, we do what we can do and let the Segalls come in from there.

I'd be happy to talk any time. Only love and respect here sir.

Originally Posted by john marcella

I can sing a song, dont mean i do it well.

[steve25]

It would seem like the EDdy pro port head would be a good starting point for a multi valve head.

[Mr Anonymous]

In the mid 80s, a few gentlemen I knew built a four-valve-per-cylinder head for an IH pulling tractor. Two spark plugs per cylinder too. I sold them two buick V6 HEIs for it. They did all of the machining themselves except for the two camshafts and their timing sprockets. Front drive was visible thru the cover they built from plex/lex. Test runs N/A on alcohol and two 3-into-1 headers directly upward found that you could make it rain alcohol and it would still run. I was there for testing, it was out of this world and sounded absolutely beautiful. Made it to one pull and it was outlawed. NO FOUR VALVE HEADS. They then built a billet two valve head, with canted valves, still DOHC. Ran awesome. Outlawed. NO BILLET HEADS. Amazing craftsmen, and ran up those against advancing the technology. Rules states 6 cylinders, so they decided to build an engine using the jugs/etc from a R4360-35B Pratt and Whitney radial airplane engine. 180 cubic inches per cylinder. They got word of it, and it was outlawed while still being developed. Tractor pullers are an odd lot, but they go to great lengths to advance the technology.

[Aaron Quinton]

No doubt, when you're good you get outlawed. Have to put a plan in place to back off enough to make the rule makers happy for 10 years or so.

Originally Posted by Mr Anonymous

In the mid 80s, a few gentlemen I knew built a four-valve-per-cylinder head for an IH pulling tractor. Two spark plugs per cylinder too. I sold them two buick V6 HEIs for it. They did all of the machining themselves except for the two camshafts and their timing sprockets. Front drive was visible thru the cover they built from plex/lex. Test runs N/A on alcohol and two 3-into-1 headers directly upward found that you could make it rain alcohol and it would still run. I was there for testing, it was out of this world and sounded absolutely beautiful. Made it to one pull and it was outlawed. NO FOUR VALVE HEADS. They then built a billet two valve head, with canted valves, still DOHC. Ran awesome. Outlawed. NO BILLET HEADS. Amazing craftsmen, and ran up those against advancing the technology. Rules states 6 cylinders, so they decided to build an engine using the jugs/etc from a R4360-35B Pratt and Whitney radial airplane engine. 180 cubic inches per cylinder. They got word of it, and it was outlawed while still being developed. Tractor pullers are an odd lot, but they go to great lengths to advance the technology.

[mgarblik]

Originally Posted by Aaron Quinton

No doubt, when you're good you get outlawed. Have to put a plan in place to back off enough to make the rule makers happy for 10 years or so.

We have found this to be true with the Pontiac powered Nitro funny car. When you are struggling and breaking every part imaginable and going broke doing it, your competitors are more or less OK with your program. I appreciate that, don't get me wrong. But when you don't give up, get faster and more reliable, your weird little Pontiac oddity comes under the microscope. When you begin qualifying near the top of a ladder and winning a round or two, then your Pontiac "must be illegal" because there is no way it could run with any Hemi, much less a Brad Anderson or an Alan Johnson. It's the nature of the sport.

[tom s]

The pic in post 27 had to be a pic just for the magazine shoot.If you look at the traditional ports of the bathtub intake and you look at the intake ports on the head there is no way it could have been run on that head.Not sure if there was ever a intake cast up for it.Maybe Dimitri knows.I would have thought they would have done a intake before the exhaust.Tom

[Aaron Quinton]

If I can help in any way please let me know. Real recognizes real.

Originally Posted by mgarblik

We have found this to be true with the Pontiac powered Nitro funny car. When you are struggling and breaking every part imaginable and going broke doing it, your competitors are more or less OK with your program. I appreciate that, don't get me wrong. But when you don't give up, get faster and more reliable, your weird little Pontiac oddity comes under the microscope. When you begin qualifying near the top of a ladder and winning a round or two, then your Pontiac "must be illegal" because there is no way it could run with any Hemi, much less a Brad Anderson or an Alan Johnson. It's the nature of the sport.

[steve25]

Tom you are correct!
That 3 valve head is from the DOHC motor in my picture from in post #24.