The Plymouth Weslake DOHC Motor from the 60's
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Got lucky just bought one on ebay thanks to all !!!Locomotboughrost: 1973024218 said:
autoxcuda
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This is the 1974 catalog. One before the 1975 you posted.
I’m pretty sure the Mullen prepped head is a Hemi head. -Mullen didn’t just do small block.
This is probably Larry Shepherds number in Detroit. I doubt he’s picking that one up anymore ;)
autoxcuda
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I have a edited mock up version of that 1st addition for SA publications. Notes, sections cut, sections pasted. Old school editing.
Or maybe for the second edition that came out in 1988 with that second edition.
I bought it at the Long Beach swap meet from what turned out to be Larry Schreib himself. He was getting rid of books and stuff. He had a ton of Automobile Quarterly’s. Got a few of those too.
SA Publications was in Brea CA between LA and Long Beach.
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autoxcuda
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Back to the 1969 Plymouth Indy car effort....
It was more than just Indianapolis 500.
And STP had a SEVEN Indy 500 entries that year. IIRC, they brought 5 plus completely different chassis. Mario won in a completely different back up car than he crashed in practice.
The Plymouth engined car did not qualify for the Indy 500. The other STP cars were Ford and Offy powered.
STP also ran sprint cars. Dirt track were part of the USAC annual championship. 1969 USAC Championship Car season - Wikipedia
Greg Weld put a Plymouth powered sprint car on the pole twice in 1969. STP teammate Mario Andretti ran an Offy powered sprint.
... a complete different time in racing than today.
Here’s parts of 1969 STP Calendar
It was more than just Indianapolis 500.
And STP had a SEVEN Indy 500 entries that year. IIRC, they brought 5 plus completely different chassis. Mario won in a completely different back up car than he crashed in practice.
The Plymouth engined car did not qualify for the Indy 500. The other STP cars were Ford and Offy powered.
STP also ran sprint cars. Dirt track were part of the USAC annual championship. 1969 USAC Championship Car season - Wikipedia
Greg Weld put a Plymouth powered sprint car on the pole twice in 1969. STP teammate Mario Andretti ran an Offy powered sprint.
... a complete different time in racing than today.
Here’s parts of 1969 STP Calendar
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Wyrmrider
Well-Known Member
Bob Mullen did some road race hemi heads for us
they later had a "D" number but I forget which
more torque
Colt
also contact rocker arm specialists in Anderson CA
They make or made case oven case hardened deep heat treated shafts with or without triple chrome which required grinding undersized then copper, then nickel, grind, then chrome
They left LA area about the same time the Air Quality people were coming down hard on the platers
they later had a "D" number but I forget which
more torque
Colt
also contact rocker arm specialists in Anderson CA
They make or made case oven case hardened deep heat treated shafts with or without triple chrome which required grinding undersized then copper, then nickel, grind, then chrome
They left LA area about the same time the Air Quality people were coming down hard on the platers
autoxcuda
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STRorange
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Nice articles there fella's!
Harry Weslake did wonderful things with DUFF heads in the UK.
Late sixties Mopar 'wedge heads' were good but obviously could be much better.
Why they didn't just re-invent the Max-wedge head, God only knows???
What work Harry did with mother Mopar is still unknown in the main?
Seems Bob Mullen and KB had better success than he did, 'back in the day'?
It would be good to find out who cast the W2 Bigblock heads and who did the initial research???
The whole W2 program was astonishing and mostly forgotten now due to rarity and time.
The early 70's was a bad time for GAS guzzlers all over the World.
A lot of technology was 'shelved' and never revisited till the later W5-W9 era.
Oval port heads was the way forwards, but never go into mainstream production due to events at that time.
Fifty years later we are still raving about them heads and still driving Gas Guzzlers, if only 440 yards at a time...
Harry Weslake did wonderful things with DUFF heads in the UK.
Late sixties Mopar 'wedge heads' were good but obviously could be much better.
Why they didn't just re-invent the Max-wedge head, God only knows???
What work Harry did with mother Mopar is still unknown in the main?
Seems Bob Mullen and KB had better success than he did, 'back in the day'?
It would be good to find out who cast the W2 Bigblock heads and who did the initial research???
The whole W2 program was astonishing and mostly forgotten now due to rarity and time.
The early 70's was a bad time for GAS guzzlers all over the World.
A lot of technology was 'shelved' and never revisited till the later W5-W9 era.
Oval port heads was the way forwards, but never go into mainstream production due to events at that time.
Fifty years later we are still raving about them heads and still driving Gas Guzzlers, if only 440 yards at a time...
STRorange
Well-Known Member
There was no intake for the W2 BB heads so one had to be converted to work.
I suppose using an adapted STR was probably a bad choice as it has several known faults!
The Weslake STR was painted 'orange' and it got polished for a street car set-up back in the 80's here in the UK.
With a 1969 only 'sand cast' Dominator fitted it was only ever gonna be a track set-up for high speed ovals (possibly)?
All the research paperwork was lost when Weslake was closed down.
Not seen as important back then, so used for 'fire-lighting' on cold winters nights lol...
Bottom picture shows the original Weslake porting plate laid over a SB W2 gasket for comparison.
I suppose using an adapted STR was probably a bad choice as it has several known faults!
The Weslake STR was painted 'orange' and it got polished for a street car set-up back in the 80's here in the UK.
With a 1969 only 'sand cast' Dominator fitted it was only ever gonna be a track set-up for high speed ovals (possibly)?
All the research paperwork was lost when Weslake was closed down.
Not seen as important back then, so used for 'fire-lighting' on cold winters nights lol...
Bottom picture shows the original Weslake porting plate laid over a SB W2 gasket for comparison.
STRorange
Well-Known Member
Modified valley tray for the BB W2 and Epoxied runners in the STR.
STRorange
Well-Known Member
Weslake STR next to an M1
STRorange
Well-Known Member
The Larry Schrieb book was written in the 80's and the Weslakes engine were still in the UK along with other hemi engines and a pile of D5 stuff too.
Obviously without the Weslake research paperwork or the engines to study, he couldn't write about them.
2020 could be the year when an UPDATED Mopar Performance book could be re-written...
50 years on it still very interesting for us old folks who love what mother Mopar 'back in the day' to compete against Chevy and Frauds...
The Hemi was under constant threat of being banned, so current Mopar wedge heads were being researched at the time, 'JUST IN CASE'
What KB and BM did with the 305ci engine was truly amazing and still seems 'beyond belief' even today with all our modern technology...
Obviously without the Weslake research paperwork or the engines to study, he couldn't write about them.
2020 could be the year when an UPDATED Mopar Performance book could be re-written...
50 years on it still very interesting for us old folks who love what mother Mopar 'back in the day' to compete against Chevy and Frauds...
The Hemi was under constant threat of being banned, so current Mopar wedge heads were being researched at the time, 'JUST IN CASE'
What KB and BM did with the 305ci engine was truly amazing and still seems 'beyond belief' even today with all our modern technology...
STRorange
Well-Known Member
This 1969 ultra rare 'Sand-Cast' Dominator now resides on the #88 record breaking 200mph car with it correct restrictor rings fitted.
512Stroker
We are all here because we are not all there.
I love those old school "Rat Roaster" manifoldsThere was no intake for the W2 BB heads so one had to be converted to work.
I suppose using an adapted STR was probably a bad choice as it has several known faults!
The Weslake STR was painted 'orange' and it got polished for a street car set-up back in the 80's here in the UK.
With a 1969 only 'sand cast' Dominator fitted it was only ever gonna be a track set-up for high speed ovals (possibly)?
All the research paperwork was lost when Weslake was closed down.
Not seen as important back then, so used for 'fire-lighting' on cold winters nights lol...
Bottom picture shows the original Weslake porting plate laid over a SB W2 gasket for comparison.
View attachment 1715550101
View attachment 1715550102
View attachment 1715550103
Plus I just like saying Rat Roaster LOL
That made may morning
Thanks
autoxcuda
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This thread is a MUST read on Bob Mullen and mid 70’s small block heads.
mid 70's NOS Mullen small block race heads
An old Mullen employee even chimes in with all kinds of cool details. Lots of pictures and comments from back in the day.
From that thread:
Quote:
“I picked these up in a package deal. Part number on box is7007194. Part number on head is 3769974. I have a matching pair. I really don't know their history or viability of use (any good to use?) so I thought I'd ask. What were these originally for? They are fully ported/polished and marked Mullen. They have "360" cast into he head as well. I even have the original boxes which I think are cool. The only think I find odd is the intake bolt pattern is slightly changed . It can be reversed easily, but why do that in the first place? Anyone familiar with these? I'll try to post some pics. Thanks in advance”
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Thank you
Hyper_pak
Old School Chrysler Fan
Ok, as long as we are covering a few different combinations, look at these pictures I found last night. Bob Glidden's Arrow, NHRA World Championship small block heads. Glidden's work, Mopar, Mullen's, who knows.
yellow rose
Overnight Sensation
Those engines were about 331 inches or so. That port and induction system was barely able to feed that displacement at 8800ish RPM.
That should show that the stroker guys are severely induction limited.
BTW, those heads had to be welded to get that port in the head.
Nice images !!!
Now that’s a tunnel port. Lol
The Mullins heads were way ahead of their time. I know a couple of bracket racers still running them.
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