Slight Engine Modifications

[thisoldtruck]

Somebody in the aftermarket crowd really needs to jump on this!  I know I would slap it on my 251 if it were available!. 

 

Seems to be a modified 265 though.

 

Andy

[41/53dodges]

I actually worked on a design project like this in college, although more performance oriented. The big challenge was trying to work with the canted valves and pushrods of the hemi with the straight vertical valves of the flathead. Never did figure how to do that with an unmodified block

[thisoldtruck]

They must have had a hole drilled at angle through the block to run push rod up to the other side.  But then there is the water jacket issue as well.  That looks like the oil filter on the manifold side of the block as well, so they must have ran different oil passages throughout the block. 

 

I think the pressure angles on the push rods/lifters/valves would have been great, maybe too great. 

 

Andy

[kencombs]

That is one odd exhaust routing design.  Ports on the left of the engine, pipe wraps around the front.  Apparently to provide heat to the intake and mate up with chassis design of the day.  The clutch and brake design would have made a LH exh exit tough.

[Plymouthy Adams]

now you folks are all realizing why this was a prototype and never in production....

[41/53dodges]

It sort of lived, but not in particular fashion. There was the Aussie 265 hemi, hardly related to ours though. Looks sort of like an AMC six with canted valves. They couldn't do the crossflow design of a normal hemi though, nor were the valves anywhere near the angle of the real hemis. That you could pull off with a stock flatty block, but bore size limits valve diameters pretty severely.

[HotRodTractor]

http://p15-d24.com/topic/46621-chrysler-a161-prototype-hemi/?tab=comments#comment-494365

[Plymouthy Adams]

on the above link it was likened that this modified flathead 6 was the stepping stone to the first hemi...actually mopar history says the first hemi Chrysler developed was a 36 liter (2220 CI)  V16 aircraft engine...it was developed late in the war and never saw production....per this bit of mopar history this led to the development of the first of the successful V8 hemi engines....the Aussie 6 was a much later design...original concept of this six was to replace the 225 slant 6 and started development in 1966, this was later dropped but Chrysler of Australia wanted a newer engine so the prototype was sent there for further development and first produced in 1970

 

https://www.bing.com/images/search?view=detailV2&id=43525E2E2559CCF29A3AC741C0B8592A0EEC0091&thid=OIP.zhWtQ2YHhC8QRLhJcPzBXgHaEt&mediaurl=http%3A%2F%2Fwww.allpar.com%2Fphotos%2Fpeople%2Fed-poplawski%2FChrysler-XIV-2220-engine.jpg&exph=503&expw=792&q=you+tube++XIV-2220&selectedindex=0&ajaxhist=0&vt=0&eim=1,2,6

Edited March 17, 2019 by Plymouthy Adams

[thisoldtruck]

So the engine in the original post above did actually run then? 

 

I’ve heard they made a DOHC version of it, which to me would make more sense from a practical point of view then with using push rods and lifters. 

[Plymouthy Adams]

are you confusing DOHC with the fact they COULD NOT make this with DOHRs   these used in their design a rocker post and not a rail rocker of twin design that a hemi engine is associated...

[thisoldtruck]

8 hours ago, Plymouthy Adams said:

are you confusing DOHC with the fact they COULD NOT make this with DOHRs   these used in their design a rocker post and not a rail rocker of twin design that a hemi engine is associated...

 

No, I mean actually making a version with DOHC that supposedly used two separate timing chains to drive each cam shaft.

 

I saw pics of one of the later V8 versions with DOHC that used one timing belt to drive both cam shafts.  That too was a display engine.  But not to be confused with the inline six version.

Edited March 18, 2019 by thisoldtruck

[Plymouthy Adams]

the DOHC engine was never run on its own power per what I have read.....dynamic testing of the valve train was by driving the crank via a pony engine for test/evualation and the design proved troublesome and per some reports kept breaking components in the valvetrain.  When Nascar killed the SOHC Ford for competing....that pretty much drove a spike in the DOHC Hemi as now there was no point to spend more time and money on the project.  Again, this is reports from various sites.  They say the two DOHC platform prototypes were destroyed....the ball stud hemi saw limited success.....