John McEwan Posted June 15, 2019 Share Posted June 15, 2019 Any opinions out there on increasing the compression on an early Dodge 4? Any advantages or maybe added strain on the bottom end? Link to comment Share on other sites More sharing options...
nearchoclatetown Posted June 15, 2019 Share Posted June 15, 2019 Yes, there are advantages. Yes, there is more stress on bottom end. BUT it depends more on how you drive it. I have a Ricardo head I want to try on one my 4 cylinders sometime. Read the thread right under this one, maybe he would make you a four cylinder head. Link to comment Share on other sites More sharing options...
Minibago Posted June 15, 2019 Share Posted June 15, 2019 A new, four cylinder head in aluminium with the spark plug over the piston is available to suit the Dodge Brothers car in Australia from Ralph Provan. Link to comment Share on other sites More sharing options...
John McEwan Posted June 15, 2019 Author Share Posted June 15, 2019 6 hours ago, Minibago said: A new, four cylinder head in aluminium with the spark plug over the piston is available to suit the Dodge Brothers car in Australia from Ralph Provan. Any more details or phone number? Link to comment Share on other sites More sharing options...
Guest Posted June 15, 2019 Share Posted June 15, 2019 4 hours ago, John McEwan said: Any more details or phone number? Lots of information on line. Remember Google, DuckDuckGo and other search engines are your friend. Link to comment Share on other sites More sharing options...
22touring Posted June 15, 2019 Share Posted June 15, 2019 (edited) I have heard stories over the years (which may be apocryphal, but I tend to believe them) that you should not use a high-compression head on an early, 3-main-bearing, 4-cylinder DB engine. Here's an advertising brochure for the Roof OHV cylinder head for the DB 4-cylinder. I don't seem to be able to upload a legible copy, so here is a link to the legible version: https://www.dropbox.com/s/4yy5uptniyk3qee/Roof OHV clyinder head for DB brochure.jpg?dl=0 Edited June 16, 2019 by 22touring the first image upload had poor resolution (see edit history) Link to comment Share on other sites More sharing options...
franklinman Posted June 16, 2019 Share Posted June 16, 2019 OK, I'm curious about the new cylinder heads that are available too. I've done a search on the fellow's name, austrailia, DB high compression heads, etc. including numerous combinations of the words/terms. Can anyone supply website, address, etc. regarding these? Link to comment Share on other sites More sharing options...
nearchoclatetown Posted June 16, 2019 Share Posted June 16, 2019 Contact the Montana Dodge Boys, they have a website. They make their own heads and have been very successful at Bonneville. 160 mph range with a fast four. They are good guys too. I know they have a six cylinder head for sale, not sure about the four. Link to comment Share on other sites More sharing options...
John McEwan Posted June 17, 2019 Author Share Posted June 17, 2019 20 hours ago, franklinman said: OK, I'm curious about the new cylinder heads that are available too. I've done a search on the fellow's name, austrailia, DB high compression heads, etc. including numerous combinations of the words/terms. Can anyone supply website, address, etc. regarding these? Apparently there is lots of information online.🙄 Link to comment Share on other sites More sharing options...
Minibago Posted August 10, 2019 Share Posted August 10, 2019 Apologies, I have been busy with work and play so missed the contact request. The engineer is in his eighties, does not have a business as such and has no email. i will contact him to see what can be done regarding contact details. Link to comment Share on other sites More sharing options...
Minibago Posted August 15, 2019 Share Posted August 15, 2019 Ralph Provan is the gentleman’s name He can be contacted on email. rod777@mac.com He lives in Seymour, Victoria, Australia. Link to comment Share on other sites More sharing options...
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