Re: Reverse Rotation 318
[Re: oldman]
#1434266
05/10/13 10:37 PM
05/10/13 10:37 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Saw one in an inboard speedboat but never got into the innards. I'd assume with the reverse rotation changing the thrust sides that the piston offset (if present) would want to be reversed to keep it functioning
live every 24 hour block of time like it's your last day on earth
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Re: Reverse Rotation 318
[Re: RapidRobert]
#1434267
05/10/13 10:46 PM
05/10/13 10:46 PM
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Joined: Jan 2007
Posts: 1,395 LAKE TEXOMA
oldman
OP
pro stock
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OP
pro stock
Joined: Jan 2007
Posts: 1,395
LAKE TEXOMA
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Quote:
Saw one in an inboard speedboat but never got into the innards. I'd assume with the reverse rotation changing the thrust sides that the piston offset (if present) would want to be reversed to keep it functioning
Yes thats what I'm working on a motor for a 1970 century Boat
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Re: Reverse Rotation 318
[Re: oldman]
#1434268
05/10/13 10:48 PM
05/10/13 10:48 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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iirc the firing order was 2=1=8=4=3=6=5=7 & I'm not even sure about that. It was a strange duck
live every 24 hour block of time like it's your last day on earth
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Re: Reverse Rotation 318
[Re: RapidRobert]
#1434269
05/10/13 10:50 PM
05/10/13 10:50 PM
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Joined: Aug 2011
Posts: 2,864 Pattison Texas
CSK
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master
Joined: Aug 2011
Posts: 2,864
Pattison Texas
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also polish the crank in the opposite direction
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: Reverse Rotation 318
[Re: Cab_Burge]
#1434271
05/11/13 08:02 AM
05/11/13 08:02 AM
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Joined: Jan 2007
Posts: 1,444 NEW JERSEY
dynamite
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pro stock
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NEW JERSEY
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Reverse the pistons,notch to the back and leave the rods were they were..polish off the rear seal groves ..use the rope type seal..and the firing order is 1=2=7=5-6-3-4=8..
Last edited by dynamite; 05/11/13 08:05 AM.
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Re: Reverse Rotation 318
[Re: jjl]
#1434275
05/13/13 06:47 AM
05/13/13 06:47 AM
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Joined: Feb 2003
Posts: 8,020 Pangaea
B5 Bee
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Pangaea
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All automotive are LH, left hand. Many marine are RH, right hand, even in single engine boats. The RH prop torque thrust in a single engine small boat helps trim it back to level when one person is aboard (right side heavy).
Are you building a new motor off an automotive core? If so, -reverse the pistons on the rods, not the rods on the crank -polish out LH rear main knurling and use a neoprene seal not rope, if you have RH knurling leave it and use a rope seal -use a reverse cam core, SB may be available new, BB isn't, besides location of lobes, the gear is cut backwards -use a reverse dist/oil pump drive gear, this allows std oil pump -use a marine thrust block between block and dist, the LH drive gear walks down against the block bushing, the RH drive gear tries to walk up so a thrust block is needed -marine dist is special with spark arresting features, it does rotate the same direction as LH, just the wire order is reversed from 1-8-4-3-6-5-7-2 to 1-2-7-5-6-3-4-8 -marine carburater, alternator and starter are special with spark arresting features, carb uses spark arrester instead of an air cleaner -water pump depends if it is raw water or heat exchanger cooled -and of course the exhaust manifolds are water cooled
What model Century? What trans, Borg Warner or Paragon? Any pics?
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