Good article...
https://www.dragzine.com/news/book-racing-engines-smashes-nhra-small-block-na-record-at-brainerd/

Looking at the heads and reading the article...seems to me that head looks a lot like the Pro Stock head and Book says it's the best platform out there.

That tells me the EFI, RPM and fuel changes mandated by NHRA really did kill Dodge Pro Stock efforts.

Certain engine builders say that NHRA wasn't aware the changes to Pro Stock would affect the Chrysler platform as it did.

I say that means NHRA is either stupid, or negligent. They SHOULD have known.


Way to NHRA. Again, you can't fix stupid.

It's a small block from pro Stock Truck, long dead before the rules changes to Pro Stock Car.

Very good read, thanks for sharing.

A great glimpse into the world of Competition Eliminator.

He actually acts like this is fairly low maintenance for one of these cars.

You have to look under the valve covers each run, but this engine can go the whole weekend without needing valve springs replaced. Now it will need new intake springs for each race and can go 40-50 runs before it needs a standard rebuild with connecting rods and intake valves. At this kind of rpm you have to be careful to make sure everything is happy,” Book explains.

Great sales pitch for boost.

Well as I am sure you know turbos are not an option in B/A. I am sure the classes that allow turbos are just as vicious.

Great reading. Bob Book is the one leading the effort to get Dart into the small block Mopar market so running times like this can only help.

P5 heads correct?
Need to mount that top end on a 500 cid block.
Matt

Exactly. If you did to this engine (limit RPM to 10,500, EFI-no hood scoop and Sunoco fuel) they would all abandon the Chrysler platform and move to GM. Just like Pro Stock.

Which is what my point was.

Sorry not buying it.
If and I mean IF what they said about "Best Platform" is true then how does limiting RPM or going to EFI would make this engine none competitive?
IMO pro stock was killed by Fiat's lack of interest.
Matt

There is tons of stuff there about this. It's a FACT. Chris McGaha had an article about it.

Sorry, you don't have to buy it. It's still the facts.

What does Pro Stock car have to do with the OP? How can you tell by looking at a photo of a small block head what killed Mopars in PS? Sorry I don't get it.

Pretty sure (decal on the car) that these are heads made by Slawko Racing Heads. From what I know about them they are P5 clones but with better castings.

Others here (Al?) probably could tell you more.

You can always follow Aussi pro stock!

Fiat is plenty happy playing with Challengers in stock class.... which makes a whole lot more sense than “naturally aspirated funny car”.

There are YouTube vids of Book at the dyno with some of these mills..... amazing sound!

Got any links to these articles?
And no i'm not being sarcastic. lol
Would like to read up on it.

Actually, the best article I read that McGaha did was in a link right here on Moparts.

I'm horrible with finding stuff like that, but I'm sure someone here knows how to find it.

One thing is I don't think that was the original thread title. IIRC someone started a thread about Pro Stock and then a link was added.


It's out there and it's worth reading because McGaha isn't an idiot.

Now that I think about it...there is a thread on competitionplus.com about the tear down McGaha had done on Elite in Seattle or wherever it was. In that thread there are 3 top Pro Stock builders contributing to that thread.

I know it's Nick Ferri, Chris McGaha and the third is V. Gaines' builder. I don't know his name. Read through the stuff they say. They talk in shades, but if you read carefully enough you vet out great info. Also in that thread is a Comp guy who stopped running Pro Stock when the EFI deal came in. He's no dummy either.

Alan Prusinski was posting on here awhile ago as well.

I like how all the latest greates heads (not just mopar) all seem to migrate the valves closer and closer to a "Hemi" valve arangement, I cant be the only one who notices this am I?

Because THAT small block head is a scaled down copy of the Pro Stock head.

I'll say it again, and this comes from the guys working on them...the intake valve placement and chamber design of the Dodge head were developed for carb'd tunnel ram high RPM Pro Stock.

When NHRA mandated a fuel change, it damn near killed the Dodge. I suspect the NHRA knew this, or at least should have known it and did something at the time to address it. But they didn't. The burn rate of the fuel killed the Dodge, again, due to chamber design.

The intake valve placement was developed for the Tunnel Ram. They placed the intake in a location that could be helped by the length of the intake runner. When NHRA mandated EFI and did away with the tunnel ram, that valve placement could not be corrected. It killed the Dodge.

The RPM limit is as stupid as you can get. The Dodge, with its chamber and valve placement was developed to RPM 6-600 RPM higher than GM architecture. NHRA had to know the ROM limit would kill the Dodge. They didn't care.


You can't blame Fiat (God knows I'd love to) for the Dodge debacle because the Johnson family was screwed for years before Fiat came along, and they kept at it.

Let's not forget, that just before the fuel change Dodge won two championships. So the platform was competitive. It went downhill from there.

Anyone who has followed drag racing (and by drag racing I don't mean bracket racing...I mean the old days of Modified, Comp, Stockand Super Stock that Chrysler has been factored, screwed with and ruled to death. Why the current Pro Stock situation would be any different I don't know.


As to how the original article can relate to Pro Stock is very simple. The Dodge platform has a similar vale placement and chamber as the Pro Stock heads. BUT, they can run a fuel other than the NHRA mandated fuel, can run carbs and a tunnel ram and don't have an RPM limit.

Make that platform the same as Pro Stock and it will die, just like it has here. It's simple if you think about it.

If the small block head is a P5 wasn't it out years before the last two or maybe three generations of PS car heads?

That's not the P5 head IIRC.