martybose Posted September 9, 2007 Report Share Posted September 9, 2007 In a much earlier thread there was a lively discussion about the HEI conversions, manifold versus ported vacuum advance, and a few other things. I said then I would post what I wound up with, so here goes. My engine is a bored out 230 (247 ci) with an Edmunds aluminum head, dual Carter-Webers on an Edmunds manifold, cast iron headers and a mild cam. I am currently running .060" gap on my plugs. I am using a timing light with adjustable digital advance to read the timing marks; everything is in crank degrees. With the engine idling at about 550 RPM I have 5 degrees initial timing with the vacuum line disconnected. With the vacuum advance connected to straight manifold vacuum I read 24 degrees advanced, so the vacuum can is adding 19 crank degrees of advance. The centrifugal advance starts to move at 1300 RPM and reaches full advance at about 2800 RPM. At that RPM it adds about 13 crank degrees of advance. The timing is jumping around a little at that speed; haven't figured that out yet. The car starts and idles easily. The only detonation that I have heard is if it is extremely hot, I am accelerating at the top of second gear and am not using full throttle. There is no detonation with full throttle; my assumption is that at lower throttle I am getting some vacuum advance and I'm not getting the power valve open, hence the detonation (very mild, however). I'm waiting now for this tank of gas to get low enough so that I can check to see if the mileage changes. Marty Quote Link to comment Share on other sites More sharing options...
splat1955 Posted September 9, 2007 Report Share Posted September 9, 2007 Hey Marty.... I'd like to hear your mileage as well......are you estimating the HP with all the new gear. Also, can you suggest a manufacturer for headers...I've got a 230 in my 48 Dodge 4 dr....would like to possibly bump it up just a little without having to re-cam right now. Anyway, any manufacters and dealers of parts for this engine would be greatly appreciated. I'd also like to see a pic of the engine when you get time. Thanks. Brian Quote Link to comment Share on other sites More sharing options...
martybose Posted September 9, 2007 Author Report Share Posted September 9, 2007 Hey Marty.... I'd like to hear your mileage as well......are you estimating the HP with all the new gear. Also, can you suggest a manufacturer for headers...I've got a 230 in my 48 Dodge 4 dr....would like to possibly bump it up just a little without having to re-cam right now. Anyway, any manufacters and dealers of parts for this engine would be greatly appreciated. I'd also like to see a pic of the engine when you get time. Thanks. Brian haven't a clue about the horsepower. My headers came from Phillips Performance, but I'm not sure he is still making them. There's a picture of my engine in this thread http://www430.pair.com/p15d24/mopar_forum/showthread.php?t=2769 posting #19. Marty Quote Link to comment Share on other sites More sharing options...
randroid Posted September 9, 2007 Report Share Posted September 9, 2007 Marty, I knew an old-time mechanic who built racing engines until the end of the 60's would spend lots of time with a distributor in a Sun Analyzer, fiddly-farting with the points until there was absolutely no bounce. There's a sweet spot in the adjustment that can't be found with a T\D meter, but if you can find a shop that has one of those Sun Analyzers with a competent (read: patient) wrencher to do the job properly you may find out one reason this guys engines always placed high. The logical route is HEI ignition where there are no points to bounce or float, but I haven't installed one in my ride, either. Keep us posted, please. -Randy Quote Link to comment Share on other sites More sharing options...
martybose Posted September 9, 2007 Author Report Share Posted September 9, 2007 Randy, My distributor is a Langdon HEI conversion, so there aren't any points at all! My suspicion is that the weights may not have a positive stop, but I haven't taken the distributor out to check it for that yet. Marty Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted September 9, 2007 Report Share Posted September 9, 2007 With the vacuum advance connected to straight manifold vacuum I read 24 degrees advanced Marty; Have you tried the same thing with the vacuum line connected to the carburetor venturi port? Quote Link to comment Share on other sites More sharing options...
jd52cranbrook Posted September 9, 2007 Report Share Posted September 9, 2007 Looks like you are using electric fuel pump? If so, can you let us know what type? And does it have a shock shut off? In case of wreck? Thanks,, really does look sweet. Quote Link to comment Share on other sites More sharing options...
splat1955 Posted September 9, 2007 Report Share Posted September 9, 2007 Hey Marty.....saw the pics of your engine.....very nice! So, I did a google search and found a " Phillips Performance"........got a web page that said the site was under construction. They did have a contact link and emailed, but got back an " undeliverable " error after sending. Seems the email address is no good. Do you have any contact info I might try? Thanks. Brian Quote Link to comment Share on other sites More sharing options...
martybose Posted September 9, 2007 Author Report Share Posted September 9, 2007 Don, Yes I did try the ported vacuum; caused my motor to ping like crazy when accelerating because I was getting too much advance. Manifold vacuum worked much better, since it reduces advance when you hit the throttle! jd52cranbrook, I'm running a solid state Facet electric pump. The picture is slightly misleading, as I couldn't get the red fuel lines to seal, so switched to AN fuel hoses. Less sexy, but don't leak! I don't have an automatic shutoff installed right now, but have thought about it. splat1955, I bought my stuff from Phillips almost 10 years ago, and his site was under construction then! I haven't been in touch with him in years. There is at least one other vender who is making reproductions of the Fenton cast iron headers, I'll have to see if I can remember who it is! Marty Quote Link to comment Share on other sites More sharing options...
greg g Posted September 9, 2007 Report Share Posted September 9, 2007 Langdon's is repoping cast iron headers for short Mopar 6's Quote Link to comment Share on other sites More sharing options...
splat1955 Posted September 9, 2007 Report Share Posted September 9, 2007 Thanks Marty & Greg........Will check Langdons... Quote Link to comment Share on other sites More sharing options...
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