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  1. #16
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    Quote Originally Posted by FMP View Post
    But FI, Algon? Just mentioned that the other day with another member from TX.
    Those transfers/ scallops above, a member from FL mentioned those a while back, worked well he said, can't remember his name.
    Bill does his transfers like that, not sure he scallops.
    Might still try that on an F5



    Gary Ferguson Mechanical FI
    I doubt the scallops on a Chrysler have any benefit, needed on OMCs because the v4 configuration causes a restriction. Chryslers are not the same.
    I have stopped doing that operation on OMCs because it weakens the piston, causes the skirt to collapse over time. Reliability cost worth the performance increase. Makes no sense on Chryslers because they are straight. Just my opinion.

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  3. #17
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    Going to agree with you on that for the matching to the lower cylinder/ block. The skirt scallop probably does help in the loading of transfer area right at the ports as the piston turns to downstroke and the scallop is functioning through the ports. Later F4 sportjet pistons had a hole not scallop that aligned with ports. Reasons were varied from lighter to low rpm help for the jet, to balance. L6 Merc configuration seemed to benefit? The bridges removed and area increase as above helps.

    The longer stroke bigger bore 103ci when worked to accept stacker pipes responds to transfer and exhaust increase better than just the original port height which is practically identical to the shorter stroke small bore 96ci original 150 stacker. When raising the duration to match the longer stroke the 103ci seemed to get real happy with the stacks and 175/180 psi according to Bill E&T. The upper range of 195psi of the 150 96ci stacker should punch pretty good.

    LA sleeve has a large o.d replacement sleeve for the 103ci that can be bored to 3.5" from 3.375 if someone was interested in doing custom piston, work the chamber etc
    Last edited by FMP; 06-28-2018 at 11:52 PM.

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  5. #18
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    I was told the hole in the piston was for the 55 hp to get it to idle better and didn't do anything for the bigger engines that used the same piston.

    how does the 103 ci respond to NOS? and did they change the three cylinder manifold thru the years? I want to make a 4 carb manifold for my 140 hp engine.

  6. #19
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    The 55/60 with the trick porting and small powerflow lu a cool engine 78/79 etc. Also had a special tuner.

    NOS would need a proper build, forged Wisecos, more clearance, jetting, extra fuel maybe?

    If you build a four carb, TC adapters need to be used , building a WB ?
    Last edited by FMP; 06-30-2018 at 07:33 PM.

  7. #20
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    TC adapter? I have my dads old race WB down stairs. it has a Al Pagel lower unit on it, I also have his Evenrude with open exhaust ports.

  8. #21
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    Sure the triples never had TC carbs , so they used WB adapters. You need to cut the mounting surface off the TC adapter and WB adapter, then weld the TC mount to the WB adapter from the triples.
    WB isn't west bend, it's a Tillotson series as is TC. TC are larger .
    Why bother with all that work putting the two triple fronts together and then use small carbs? Go the extra step and use TC.
    Last edited by FMP; 06-29-2018 at 10:42 PM.

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  10. #22
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    ok, that makes more sense. which engines did the TC come on? I have a older 70 hp and a 90 hp charger, do they have different carbs too? My outboards are behind everything in storage, so its not that easy to just look. I just have a 115 blue charger at the house.

  11. #23
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    No triples but maybe someone at the r&d made some once for testing? I have only seen one pic of a TC triple, that was an inboard mounted with ex pipe home built, not Force. Maybe I can find it back.
    TC , mid to higher hp fours. Some year 115hp 78/79, doesn't matter if Charger. 80/81+ they went back to WB.

  12. #24
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    Why not just use someone else's carbs?

    There are bazillions of 1 3/8" OMC 2 barrels and also Mercs. Cheap too.

    An intake for four two barrels would be trick.

    Love seeing the hot rod Chrydlers.
    I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.


    I refuse to allow common sense to interfere w/my boat buying decisions.


    Checkmate 16' 140 Johnson
    Hydrostream 17' Vector FrankenRude I
    Laser 480 (?) 21' w/GT 200
    Glastron Carlson Conquest w/XP 2.6
    Glastron Carlson CVX 20 w/XP 2.6
    24' Sonic w/twin 250 Johnsons
    24' Sonic w/twin 250 HO Johnsons
    19' STV River Rocket w/FrankenRude II
    Allison XR 2002 w/Frankenrude II
    Hydrostream 18' V-King w/Frankenrude II

  13. #25
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    ccc front on a v4...
    Its on my list

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  15. #26
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    Someone must have built one with bigger carbs just replacing the two TC or WB?
    I know of a 50mm that bolts right up but throttle had to be moved side to a side, haven't tried it yet.
    Last edited by FMP; 06-30-2018 at 11:07 AM.

  16. #27
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    that mod triple with TC, mounted to stay level when installed in hull
    Attached Thumbnails Attached Thumbnails asset.jpg   asset (1).jpg  
    Last edited by FMP; 06-30-2018 at 07:43 PM.

  17. #28
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    I went thru the old OMC R&D down in Waukegan, they had a V6 sitting on its side mounted to a jet drive in a sprint boat, there was also a wall of V8's , that was a month before they went bankrupt, glad I didn't take the job

  18. #29
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    Maybe late one night you could have backed the truck up to put things in storage no don't do that
    Last edited by FMP; 06-30-2018 at 08:38 PM.

  19. #30
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    Quote Originally Posted by Poky View Post
    I went thru the old OMC R&D down in Waukegan, they had a V6 sitting on its side mounted to a jet drive in a sprint boat, there was also a wall of V8's , that was a month before they went bankrupt, glad I didn't take the job
    I drove through the old site a few days ago.
    I'd rather be competitive w/junk I built in my garage than win w/stuff I bought.


    I refuse to allow common sense to interfere w/my boat buying decisions.


    Checkmate 16' 140 Johnson
    Hydrostream 17' Vector FrankenRude I
    Laser 480 (?) 21' w/GT 200
    Glastron Carlson Conquest w/XP 2.6
    Glastron Carlson CVX 20 w/XP 2.6
    24' Sonic w/twin 250 Johnsons
    24' Sonic w/twin 250 HO Johnsons
    19' STV River Rocket w/FrankenRude II
    Allison XR 2002 w/Frankenrude II
    Hydrostream 18' V-King w/Frankenrude II

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