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Does size matter?

Discussion in '348/355' started by enginefxr, Nov 21, 2008.

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  1. enginefxr

    enginefxr Formula 3

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    #26 enginefxr, Nov 25, 2008
    Last edited by a moderator: Sep 7, 2017
    While I had the camera out today, the guys were taking this dirt track engine apart...these are the two pistons at the rear of the block. The rust colored stuff is pieces of the cylinder wall on top of the piston. The back cam tunnel was blown off the block and the last 1/4 of the camshaft was spit out the back into the bellhousing I guess--the owner never found it. Must still be on the track. :)
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  2. Llenroc

    Llenroc F1 Veteran
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    #27 Llenroc, Nov 25, 2008
    Those TI(355) connecting rods are art work in themselves.
     
  3. saw1998

    saw1998 F1 Veteran

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    #28 saw1998, Nov 25, 2008
    +1. I was thinking the same thing. Back to valves, I think the F355 was also the first road car to utilize hydraulic lifters at over 8000 RPM. Pretty damn impressive. Now, if they could have only made exhaust manifolds that didn't self-destruct, interior parts that didn't get sticky,.......
     
  4. enginefxr

    enginefxr Formula 3

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    #29 enginefxr, Nov 25, 2008
    ...valve guides that lasted...
     
  5. ernie

    ernie Two Time F1 World Champ
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    #30 ernie, Nov 26, 2008
    Man look at the difference! I'm kinda curious as to why the NACAR engine is running H-beams? I know there are a lot of import guys that like to run H-beams because of high rpm, as they help reduce windage, but with the torque the cup cars are putting out wouldn't they be twisting more?

    It really is impressive that the 355 can make the power it does with as small as the valves (maybe because they use 3 intake valves) and pistons are. If I'm not mistaken it was the first production engine that made over 100hp/liter.
     
  6. enginefxr

    enginefxr Formula 3

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    #31 enginefxr, Nov 26, 2008
    The Nascar rods are Carrillo tapered "A" beam rods. Pretty light weight bu strong as hell. Carrillo was the original "H" beam rod maker-- they still must be the best, based on their prices vs. others. The use a secret alloy too, CarrilloAlloy.Or something like that. Others use regular 4340 chromoly, and better ones use 300M material. IRL cars also use Carrillo "A" beams, or a least they used to before Honda signed on with them. They were some cute little bastards :)
     
  7. ernie

    ernie Two Time F1 World Champ
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    #32 ernie, Nov 27, 2008
    Last edited: Nov 27, 2008
    ???

    Okay, unless I'm nuts or something, isn't the rod in the middle the nascar rod, and it sure looks like an h-beam to me? None the less I had no idea that the cup boys where running a-beams? I guess it helps them from a cost prospective huh?

    By the way, thanks for putting up the pics. They really are educational, and it was fun seeing the difference.
     
  8. UConn Husky

    UConn Husky F1 Rookie

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    #33 UConn Husky, Nov 27, 2008
    On that windage, some teams are superfinishing all moving parts like connecting rods, cranks, etc. to make them slicker than **** through the oil. If I ever got into that level of teardown on the 355 (engine or tranny) I'd have all key parts superfinished! REM is one of the best processes out there, gives a mirror finish...
     
  9. ernie

    ernie Two Time F1 World Champ
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    #34 ernie, Nov 27, 2008
    Ah yes, the isotropic superfinish. I was thinking about having it done on my gears back when I had my gearbox apart. These are the fellas that came up with the prosess. http://www.remchem.com/cms/index.php?page_id=52
    I didn't get it done because I had my gearbox apart for so long I just wanted to get the car back on the road.
     
  10. enginefxr

    enginefxr Formula 3

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    #35 enginefxr, Nov 28, 2008
    Yes, the rod is what is called an H beam. All of Carrillos rods are H beams, they were the original designers of them, everything after has been a rip off of their design. Anyway, they call their rod like this a tapered "A" beam, because unlike regular H beams that are the same width on the beam area, they offer some that are tapered like this to save weight-- shaped like an "A". The other common rod design is an "I" beam design, Carrillo doesn't even make a version of that. The Ferrari rod would be an "I" beam design, the aluminum rod is too, same as a standard Chevy rod.
     
  11. enginefxr

    enginefxr Formula 3

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    #36 enginefxr, Nov 28, 2008
    There are also oil "shedding" coatings that can be applied. I have used alot of these successfully over the years. Alot cheaper than the REM finishing process.
     
  12. ernie

    ernie Two Time F1 World Champ
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    #37 ernie, Nov 28, 2008
    Aaaaaaah. Thanks for clearing that up. I would have never picked up on the tapper hand you not pointed it out.
     
  13. PAP 348

    PAP 348 Ten Time F1 World Champ
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    #38 PAP 348, Nov 29, 2008

    Cool pics!! :):)
     
  14. conscom

    conscom Formula Junior

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    #39 conscom, Dec 7, 2008
    Thx for the educational pix.
     
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