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flexplate or flywheel on the raceboats ?

 
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RED ROOSTER



Joined: 04 Aug 2010
Posts: 86

PostPosted: Wed May 18, 2011 1:14 am    Post subject: flexplate or flywheel on the raceboats ? Reply with quote

flexplate or flywheel on the raceboats ?
For a zz4
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Arthur
Outlaw Eagle Admin


Joined: 28 Oct 2006
Posts: 1654
Location: On the rocks

PostPosted: Wed May 18, 2011 7:27 am    Post subject: Reply with quote

Hey Rooster.....how about some pics of you're boat? Love to see how the conversion to a raceboat is going.
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Wocket16



Joined: 11 May 2010
Posts: 45

PostPosted: Wed May 18, 2011 7:52 am    Post subject: Reply with quote

flexplate- my zz4 came with one that I use. Have used flywheels in the past, just extra weight.
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RED ROOSTER



Joined: 04 Aug 2010
Posts: 86

PostPosted: Mon May 23, 2011 11:32 pm    Post subject: pics and zz4 mounting questions and header question Reply with quote

Thanks for the info about the flex plate. I couldn't use that little flexplate, I figured you guys would tease me. It looked like it was from a honda civic ! I also couldn't use a top mount starter with it... I installed a 168 tooth flexplate with adapter and it worked out ok.
Do all flexplates have a little wobble to them ?

What angle do I mount the motor on ? I have the boat level, gunnels and transom and the carb is also level, any input as to what angle to mount the motor ? I'm using a 4 point mount. I'm guessing I should try to simulate the three point angles ?

And lastly, what headers do I use, I've tried several car headers turned upside down and none clear the transom more than half an inch.....

Here's some pics.

Thanks guys



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RED ROOSTER



Joined: 04 Aug 2010
Posts: 86

PostPosted: Mon May 23, 2011 11:37 pm    Post subject: headers pics mount angle Reply with quote

one more


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Itsworthit



Joined: 15 Jun 2005
Posts: 432
Location: Whitecourt

PostPosted: Tue May 24, 2011 7:12 am    Post subject: Reply with quote

It's a good idea to build a guard over the flex plate, when you get water in the bottom of the boat, the flex plate picks it up and get your distributer wet
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Wocket16



Joined: 11 May 2010
Posts: 45

PostPosted: Tue May 24, 2011 7:59 am    Post subject: Reply with quote

Real good tip on the guard, might let you finish with a leak!
Like how you did your plate and starter mount. None of my flexplates have ever run dead-on flat either.

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RPM



Joined: 17 Dec 2006
Posts: 189
Location: Nechako

PostPosted: Tue May 24, 2011 1:49 pm    Post subject: Reply with quote

Rooster , set your engine with the crankshaft parallel with the pumpshaft . Rewarder make a lot of the raceboat headers and are reasonable . know of a set for a zz4 that might be available , i'll check .
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TOP DAWG



Joined: 15 Jun 2005
Posts: 574
Location: Peace River Alberta anada

PostPosted: Tue May 24, 2011 6:31 pm    Post subject: Reply with quote

From what I know you should never run U-joint at zero angle, 3-4 degrees is what i was told.
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RED ROOSTER



Joined: 04 Aug 2010
Posts: 86

PostPosted: Tue May 24, 2011 11:07 pm    Post subject: help Reply with quote

thanks for your help guys, I'll fab up a simple splash guard for my wobbly flywheel.

I mounted the motor nearly flat, leaving some room for a good sized dent beneath the oil pan......

From what I understand about a zero angle driveshaft is that the needle bearings don't move at all and they get flattened and fail wheras if there's a slight angle, they rock back and forth and last longer.

It's amazing how all the small parts hold a project up !
headers, carb, wings and comm sys. I don't have much time to work the bugs out until july...
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RPM



Joined: 17 Dec 2006
Posts: 189
Location: Nechako

PostPosted: Tue May 24, 2011 11:27 pm    Post subject: Reply with quote

Rooster , "mounted the motor nearly flat " so is that to say parallel to the keel ? pump and crankshaft should be parallel . to get the 2 or 3* in the driveline raise the engine but the shafts should be parallel .
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TOP DAWG



Joined: 15 Jun 2005
Posts: 574
Location: Peace River Alberta anada

PostPosted: Wed May 25, 2011 11:23 am    Post subject: Reply with quote

Good Point RPM< i should have stated that, if your running a single u-joint the the two shafts need to have a few degrees of separation, if your running two u-joints the the shafts need to be parralel but have a different height to create the exact same angle in both u-joints. Now in the case on a CV joint it doesnt matter and i doubt your using a CV, it just an FYI
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DOC



Joined: 17 Jun 2005
Posts: 329
Location: Whitecourt

PostPosted: Wed May 25, 2011 11:17 pm    Post subject: Reply with quote

If the wobbly flexplate bothers you, get " THE WHEEL " Its a solid steel unit that doesnt move. AMS in edmonton sells them.
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sandman



Joined: 15 Jun 2005
Posts: 260
Location: The captains table

PostPosted: Thu May 26, 2011 8:27 am    Post subject: Reply with quote

It is easier to find the starters that go with the 168 tooth flywheel than it is to find a starter that fits the flexplate.
They seem to be more common and in stock more often as of last week. Even using suitable cross references like a 85-87 Camaro with 5 speed manual trans.
None of the GM Dealers from Dawson Creek to Whitecourt had any in stock for my zz4. Had to order one in.
I have raced with both and see no reason for the extra weight of the flywheel. Parts availability, maybe!

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