RD 501 November 14, 2011 12:40PM
I have been searching around and not finding to much info. How much power can be made with a 501 ?? I was toying around with the idea of building a turbo 501 for my 560. Think you could get 5-600hp and make it live ?? Lastley what would I find one in and how can I id a 501 from a 450 etc ??



Edited 1 time(s). Last edit at 11/14/2011 01:10PM by MikeR.
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Re: RD 501 November 14, 2011 02:58PM
hp is easy finding one is a little harder
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Re: RD 501 November 14, 2011 03:04PM
lol yea i havent heard of many for sale. Mid to early 60s r model ih trucks is what I would be looking for correct ?? Do you know how to tell them apart from the 450 and others ??
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Re: RD 501 November 14, 2011 03:51PM
Old fire trucks, including FWD, keep a eye on ebay motor's and the used fire truck online dealers.

Just to stir the pot, why is a 501 inline 6, ok in hot farm, and yet a IH 345 V8, off a IH combine or a IH 549 V8 stationary engine, would put the tractor in the Mod class?
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Re: RD 501 November 15, 2011 12:33AM
Most clubs say you sheet metal and engine configuration must match. So a v 8 has to use 1468 or 1568 sheet metal. And must meet cu in rule.
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Re: RD 501 November 15, 2011 02:43AM
372, 406, 450 & 501 are the same block. Yes, used in the 50's & 60's "R" series heavy duty gas trucks, that were very popular. The engine line was discontinued by about the mid 70's (Fleetstar & Fleetstar A series trucks), as I recall, due to EPA regs (no lead gas) and everyone switching to V-8's and the new advent of mid size (DV 550 & DT 466) diesels for these trucks.
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Re: RD 501 November 15, 2011 03:20AM
I know of a 450 and a 501 that are for sale........ Give me a call if your interested 319 404 5146
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Re: RD 501 November 15, 2011 06:50AM
They will bolt in the same but crank and cam gear sets are different between the engines. 501 doesn't have sleeves and the others do.
the crank location in the blocks are different for the larger stroke.450 to 501 the bore and stroke are bigger. There is an early and late block and head. Different water pumps between them and different head gasket kits.How to tell what your getting on left side of block just below head gasket between dist. and front of the block is a spot that should read RD 501. Onother way is get the casting # of the crank shaft i think between #1 rod and #2 main journal. or with head off check for sleeves and measure the bore.Should be 4.500" is what i remember. Consider this I=if you are going to build a limited rpm class engine with big cubes then RD 450 would be fine. If you are building and open class high rpm engine the RD 501 would be the better choice. I have the mountin kits to install the RD engines,ta delete shaft ,fast constant mesh gear sets, and clutches. Floyd Isbell 570 637-1311 [customtractorparts.com]
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Re: RD 501 November 15, 2011 04:42PM
Thanks for all the info guys !! Looks like I have a couple phone calls to make tomorrow morning. Anyone ever try one on alcohol ??



Edited 1 time(s). Last edit at 11/15/2011 04:51PM by MikeR.
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Re: RD 501 November 16, 2011 12:45AM
Why run alcohol when u can run VP race fuel for compression up to 16:1. No advantage other than you can mix a lot of different additives to it to make power.
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Re: RD 501 November 16, 2011 02:48PM
Floyd, what's the maximum cubes the 501 will support? What are the tricks to do it? Thanks.
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Re: RD 501 November 21, 2011 09:01AM
I have not done a lot to the RD 501 and 450 engines. I have sold a lot of installation kits and the largest cid i heard was 780. Keep in mind the bigger you go the slower normally they turn less rpms.
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