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2wise4agm 
Orange Level
Joined: 19 Aug 2011
Location: Smithton, MO
Points: 538
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 Topic: Best 301?
Posted: 12 Oct 2013 at 8:37am |
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I've been tossing around the idea of building another 301 for my 190xt to make mine a little hotter. I know that there were improvements through the years so what would be the best one to look for and what are the improvements that they have? Any big structure differences I should look for? (Block, head, rods?). Is there any 301 that is going to have a big enough pump on it that I could use or will I be looking at replacing that anyway?
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DougG
Orange Level
Joined: 20 Sep 2009
Location: Mo
Points: 7943
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Posted: 12 Oct 2013 at 9:00am |
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Talked to an older mechanic last night and he was talking of the JAP rods etc in the 200, the later 301,s ; he talked like they were all junk , nothing in spec ; seems the early ones were good ecept for the cam driven oil pump set up
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AS185
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Joined: 23 May 2012
Location: Waupaca
Points: 91
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Posted: 12 Oct 2013 at 9:42am |
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I run my stock 301/8010 engine around 45-50 lbs of boost at 4500 r.p.m. no damage yet and it has been 6 years of pulling. I have to agree with the older mechanic.
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2wise4agm
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Joined: 19 Aug 2011
Location: Smithton, MO
Points: 538
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Posted: 12 Oct 2013 at 1:52pm |
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That's what I have now. Cam driven oil pump and connecting rods with the serrated caps. Works great and pulls good, but I know it's probably gonna give it up some day and I just want to be a little prepared when it does. It isn't too hot, turns 3000 or so rpm and only builds 40 lbs of boost so I've got a little time. Most of my pulls have a speed limit of 5 or 7 mph. My tractor is really good in those pulls, but I don't have the power to run the open classes which I would like to do in the future.
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O.P.S. Heads
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Joined: 02 Jan 2013
Location: Iowa
Points: 574
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Posted: 12 Oct 2013 at 10:11pm |
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The later 301 block are nice due to the crank driven oil pump and piston cooling. If you plan on running good enough to be in 7th gear in a 190 the connecting rods probably should be hardened. If you want to go faster than 7th gear in a 190 you need an inline pump or could use the American Bosch rotary pump (like on the later 8010 engines). The later cylinder heads vs. the older heads - no difference in performance. Copper injector sleeves in the newer heads.
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rowcropmafia
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Joined: 11 Sep 2009
Location: illinois
Points: 208
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Posted: 13 Oct 2013 at 12:42pm |
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I have one for sale on here with a bosch pump. Im sure you already saw it. I have it a 180 could run 6th gear well sometimes 7th at 3000 rpm
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AC200Puller
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Joined: 04 Dec 2011
Location: Wisconsin
Points: 774
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Posted: 13 Oct 2013 at 6:11pm |
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I run a late model block with hardened rods in it and 426 valves ported early head and 426 valves with reliefs cut in the jugs to make room for them with a dm style pump putting out 410 cc's seems to be very reliable and competitive, the biggest thing is to have a turbo that matches your setup.
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