1991 BFN engine rotation? Which dizzy |
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Sam Hamm
Senior Member Joined: September-08-2012 Location: Alabama Status: Offline Points: 123 |
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Posted: June-07-2013 at 12:38am |
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Im in the process of getting rid of this protec setup and going with a distributor. I know skidim makes a kit that says its for reverse and standard rotation motors. My question is how do I tell which one my motor is? Its a 1991 BFN with the 454 v drive.
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TX Foilhead
Grand Poobah Joined: February-01-2009 Location: Kingsland TX Status: Offline Points: 2076 |
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What does the tag say? Should be one bolted to the intake and another one on the bellhousing.
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hotboat
Gold Member Joined: March-28-2009 Location: Conn Lake Pa Status: Offline Points: 814 |
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Mine was reverse, what rotation prop is on it?
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Brian
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Sam Hamm
Senior Member Joined: September-08-2012 Location: Alabama Status: Offline Points: 123 |
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Model: PXRK-WR-R10T
Firing order: 12756348 Not sure on the prop. How do I find out? |
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Sam Hamm
Senior Member Joined: September-08-2012 Location: Alabama Status: Offline Points: 123 |
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The motor is backwards of course, but when it's running the pulleys are spinning left, which means the flywheel is spinning right. Correct? So that's reverse rotation?
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hotboat
Gold Member Joined: March-28-2009 Location: Conn Lake Pa Status: Offline Points: 814 |
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Correct, reverse rotation, front of motor ccw
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Brian
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21172 |
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Yep, that's a righty.
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Sam Hamm
Senior Member Joined: September-08-2012 Location: Alabama Status: Offline Points: 123 |
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Any idea why skidim kit says for RH or LH, but if you go to buy a distributor itself it specifies? I'm just trying to get my ducks in a row before I paid $600 for a kit.
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Waterdog
Grand Poobah Joined: April-27-2006 Location: United States Status: Offline Points: 2020 |
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Have ya looked into Davis Unified Ignition ? (DUI)
2 wires EASY to install, a lot less cash. |
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Sam Hamm
Senior Member Joined: September-08-2012 Location: Alabama Status: Offline Points: 123 |
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That's actually the one I'm wanting to go with but want to make sure it will work because they only make them for standard rotation according to summit.
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hotboat
Gold Member Joined: March-28-2009 Location: Conn Lake Pa Status: Offline Points: 814 |
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There is no timing chain in that motor, they run gear to gear so it has a regular rotation cam with a different firing order
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Brian
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21172 |
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I would caution saying that a RH 454 has a "regular rotation cam"... though it does spin opposite the crank. Its still a reverse rotation cam (meaning its a cam meant for a reverse rotation engine). Ive also heard it called "standard rotation reverse fire".
Either way, what it means is that the distributor gear does not need to be cut the opposite way for a RH 454... same dizzy works for both LH and RH engines (I have a DUI on our '79 BFN with a RH 454). |
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ny_nautique
Platinum Member Joined: June-01-2011 Location: Albany NY Status: Offline Points: 1215 |
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They do make them for reverse rotation. See here. |
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- Jeff
1999 Ski Nautique |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21172 |
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Yes they do... but still not applicable to the RH 454 (no gear swap needed). |
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Sam Hamm
Senior Member Joined: September-08-2012 Location: Alabama Status: Offline Points: 123 |
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So I can or cannot use a standard rotation DUI distributor ?
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Waterdog
Grand Poobah Joined: April-27-2006 Location: United States Status: Offline Points: 2020 |
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I put a DUI in a gear drive reverse rotation 350(GM) in my Tique.
same dissy gear as STD rotation. Around $400- |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21172 |
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Sam Hamm
Senior Member Joined: September-08-2012 Location: Alabama Status: Offline Points: 123 |
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Thank you! I over read what you were saying.
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