Graeme1938

1928 1929 1930 Chrysler 72 75 and 77 Alloy Cylinder Heads not Red Head

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Greetings all,

The next batch of Vintage Racing Chrysler Cylinder Heads are off to be tempered and machined. 

These are the heads cast using the Ray Jones (Vintage Racing Chrysler’s) patterns. We are using the same foundry and same material specifications that Ray Jones used to such good effect. These patterns are the ultimate version with the extra stiffening ribs and most effective compression ratio.

Ray did a lot of flow bench work and dynometer testing. One of the things he found was that raising the compression ratio beyond a certain point caused a decline in performance from that achieved at the optimum compression ratio.  

Vintage Racing Chrysler Heads proved themselves on the super fast 72 75 and 77 Chrysler’s and the Donald Campbell replica that he built. His cars toured, rallied and raced very successfully and reliably.

Ray was timed at 118mph in his 1929 Chrysler Series 75 Roadster down the Mulsanne Straight. He completed Mille Miglia’s, LeMans and raced all over the world always at the pointy end. Hard to argue with results. 

The patterns are beautiful in themselves. 

We also have the rest of his patterns for the bits and pieces he manufactured including the patterns for the dress up pieces (side plates that don’t leak etc)

Regards,

Graeme Louk

Australia 

 

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Edited by Graeme1938
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This is truly exiting stuff and a welcome initiative to improve on the HP of 7-bearing 6-cylinder engines. I will need one if I go for an entry in Mille Miglia, where an old Chrysler is welcome and very well suited.

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Yeah this is pretty cool I have just purchased a Bit of a project car that’s a Chrysler 75 that has had the Ute treatment. Not exactly sure of what we are going to do with it yet but it is always good to know of a source for parts etc. this is exciting.

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2 hours ago, Coupe_deVille said:

Do they fit on a newer 25" block?

Sadly no: It’d open up a big market opportunity. They will fit the big pre 1930 engines 72, 75 and a 77. They could be made to fit the first Series 70 from 1926. 

I’m not an expert but I think go fast heads are already available for the newer block. 

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3 hours ago, Narve N said:

This is truly exiting stuff and a welcome initiative to improve on the HP of 7-bearing 6-cylinder engines. I will need one if I go for an entry in Mille Miglia, where an old Chrysler is welcome and very well suited.

You will also need a co-driver. Can I register my interest now and let you know that I’m available. If you need further encouragement can I also say that I serve well as ballast, I’m pretty hardy and will push until I drop, I’m not bad on the wrenches, know how to repair a puncture and I’m not overly fussy. On the downside I don’t mind a tipple but that makes me hard to start early in the mornings. 

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3 hours ago, Vintageben said:

Yeah this is pretty cool I have just purchased a Bit of a project car that’s a Chrysler 75 that has had the Ute treatment. Not exactly sure of what we are going to do with it yet but it is always good to know of a source for parts etc. this is exciting.

Hey Ben,

Did you just purchase the 75 that was on eBay Australia. If so I say well bought. 

If you’re going to put a correct engine in it get in touch as I may be able to supply some leads. 

Forza Chrysler 

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6 hours ago, Graeme1938 said:

Hey Ben,

Did you just purchase the 75 that was on eBay Australia. If so I say well bought. 

If you’re going to put a correct engine in it get in touch as I may be able to supply some leads. 

Forza Chrysler 

Yeah that’s the one. I’m still deciding what to do with the car, I’m pleased that’s others feel that it was well bought, I’m happy with it. I awould like to get the motor running and see how good it is before I make too many decisions. I do have many parts for a 28 Chrysler 72 Sports Roadster including a fairly complete motor and gearbox  (condition unknown).  As I understand these are very similar to the 75. Any way I will probably pm you in the next couple of days as at the moment we are pretty busy here work wise. 

Cheers ben

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3 hours ago, lambroast said:

Hi Graeme,

Any idea when the heads will be available, and what the cost might be? 

Hi Lamroast,

At this point we only have a ball park figure and won’t have a firm figure until they are completely finished.

There’s a few of us that wanted them so we decided to just do it and split the costs.

One guy has backed out so there’ll be one head from this batch for sale early in the new year. 

We will manufacture batches of them for sale once we are sorted. I’ll put them on the AACA buy and sell when we are there. No sense in over promising and then under delivering. 

Here’s where we are at at the moment - The castings have to be heat treated before we take them to the machine shop. There’s a delay because we are waiting for other casting to be done in the same material specifications so that we hold the costs. If we get the heat treaters to run an oven just for us it doubles the cost of the castings. 

Once the machine shop has machined them we’ll know how much that costs. The machine shop is going to take the job on a do and charge basis. They need to make jigs and as they are getting CNC machined there’s drawings to. But with CNC machining they will be accurate and repeatable. 

It been a time consuming process but it’s important to get it right and they are getting there. 

As well as getting them right we want to make them a viable option as replacements for standard heads not just a high end racers whim which means containing costs.

There is no way that we could ever manufacture enough to get the prices anywhere near the mass produced go fast gear that’s available for flat head fords. 

When we have a number we’ll tell people what that is. I should probably dig a bunker to hide in when that time comes as there’ll be a few that woulda, shoulda, coulda done a better job for a fraction of the price in half the time. But that’s the same with all jobs. 

So that’s the long answer. 

The short answer is no .....Sorry

Stay tuned and we’ll let you know. 

Have a great weekend. 

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Graeme, I don't have a Chrysler that these heads will fit on.......but I applaud you and your group of folks for taking the leap of faith to make these heads available for Chrysler owners. I'm sure that this is not a money-making proposition especially when you consider the time invested in making all this happen, but it's the kind of thing that makes this old car hobby (hobby as opposed to a business) endure.

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