Search results for query: Open chamber domed

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  1. Mark W

    Is this an F or 2f Block?

    I do not see an oil filter or oil filter mount on the tight front side of the block. If it is actually not there, then the filter mounts to the intake manifold and it is an earlier F engine. I also do not see an oil fill tube on the right hand side of the engine, so it is not a very early F...
  2. Wadepat2

    2uz engine build 300 to 400 to 500whp?

    Thanks for the info! Guess I know have 10:1. I went with stock CR listed as 10:1 Manley pistons. Will see how that works at 15-16 psi
  3. 2001LC

    2uz engine build 300 to 400 to 500whp?

    Seems Piston change in shape, increased compression. With Valve length the same, and believe only the VVT is a true interference engine. Would also indicate piston dome higher. No mention of change to heads' combustion chamber or length of rods.. So I suppose it depends on if your new pistons...
  4. 3

    Buying, Selling & Trading

    closed chamber and open chamber are the main differences, domed pistons would contact a closed chamber head and an open chamber head would have lower compression with flat top pistons there was thought years ago about taking .1"?? off an open chamber head to help the compression with flat...
  5. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    It’s a 61030. I need to get the head cleaned and checked for cracks. It’s pretty corroded. The end freeze plug was totally rusted through. The pistons (100) don’t look bad. The cylinder walls have some surface rust but no signs of pitting, and no significant ring ridges that I can detect...
  6. fjc-man

    Pop Question about 2F Piston/Head Tradeoffs

    Well you can figure out half the puzzle if you look at the cylinder head number cast into the head. What is yours?
  7. rstoddard

    2F head Casting 61010 info needed - which replacement head will work

    Jim, if you are contemplating a rebuild with a '75 2F Engine (Domed Pistons) and a 61030 Open Chamber Head, and you have to bore the cylinders, and domed pistons NLA, what do you do? I assume you go with flat head pistons, but what head do you look for?
  8. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    Is there a demand for used domed pistons and open chamber heads? Can I sell the parts and keep the block and crank?
  9. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    I don't know for certain... I picked up the engine recently not knowing the year. I cleaned off the SN (2F 037791) and from the MUD Spreadsheet determined it was a 1975 Engine. I'm going with the assumption it's an open chamber with domed pistons. I'm just wondering if I should be thinking...
  10. aztoyman

    Pop Question about 2F Piston/Head Tradeoffs

    Bumping your compression (within reasonable limits) is a great way to increase low end torque. If domed pistons are NLA as mentioned I would run the closed chamber head if you have one. If you run the closed chamber head and flat top piston you can still mill the head to achieve more...
  11. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    I’m not trying to build a muscle car. I just want to build a respectable 2F with good low end torque. I understand that the open chamber heads with domed pistons have a lower compression than the closed/flat and we’re designed primarily for smog control. If I’m going to rebuild a 2F I want...
  12. White Stripe

    Pop Question about 2F Piston/Head Tradeoffs

    He is saying closed chamber heads are more efficient. Which you use with flat top pistons. Then you mill the head to raise compression. What year heads are closed chamber should be easy to find out doing a search, but I don't know personally. For such a setup you would run a sniper with timing...
  13. rstoddard

    Pop Question about 2F Piston/Head Tradeoffs

    Mark Whatley wrote this in 2006. Can anyone help me understand what Mark is saying about the trade off between using the ‘75 (“early”) head versus the “later” (years?) head to achieve higher compression? I have a ‘75 2F I’m looking at rebuilding and I’m wondering if this comment from Mark...
  14. Pighead

    2f engine, pistons and head.

    I forget what head number i have, but i know it's off a Late F engine. Pretty sure it's the open chamber head you mention. Back in 2004 when i rebuilt the 2F block, i was able to find Federal-Mogul domed pistons and Total Seal rings, .050 over, for it. It bumped compression pretty well, had some...
  15. tltaylor22

    2f engine, pistons and head.

    It's been years since I was active in cruiserdom other than oit crewing with Canguro Racing but after my 1976 fj40 had been parked for 19 years I'm finally making progress in getting her back on the road. What I thought was simply a "rings didn't seat" issue on my motor with 2k miles on it...
  16. kenavt

    Swapping '78 FJ40 2F into '84 FJ60

    Alright, done more research and have figured out some things and have more focused questions on the others that probably don't matter... For domed (and open combustion chamber) vs. flat pistons (closed combustion chamber), it seems like the power output is probably pretty similar even though...
  17. FJ60Cam

    Three 6 Hybrids is Moving Out of the Carport

    Another visual distraction before we head back into the rabbit hole. This is the last of the motors started at the original carport lab... It’s an early 2F with the dome pistons and open chambered head. The pistons for these motors have long been discontinued from Toyota, but I found a...
  18. S

    1977 2F motor

    Yes the pistons are domed. Looking forward to getting this behind me.
  19. Cruiserdrew

    1977 2F motor

    So the '77 motor has an open chamber head, and is supposed to have domed pistons to compensate. Are the MAF pistons domed? What's your compression? If there's a mismatch between head and pistons, I think the compression test will reveal it. If the pistons are flat, an FJ60 head will restore...
  20. FJ40Jim

    Smashed Sparkplugs??

    61218 is the engine block casting date. 6 = 1976 12 = Dec. 18th day of month. Yes, all the 75-80 US spec 2F have open chamber head, dome piston and low compression. Other markets get a 61010 head & flattop pistons for better performance.
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