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Big Block Talk! Everything about swapping a big block engine into your cart!



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Unread 09-16-2012, 08:30 AM   #1
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Default 99 CC BigBlock nearly done but.......

As some may know I have done all of the conversion myself, cradle mods, exhaust, conversion of the previous propane fuel system to gas and all internal mods to the 21 hp Briggs. Built to run 6k rpm and should be near 35+/-hp or so I have neared completion of my build but I noticed that now I have changed the rotation of the motor it seems as the cradle torques up quite a bit. Original motor it would have twisted down but with the rotation change it rotates up. What has anyone done to rectify this? Or is it ok? Seems to be quite a bit excessive, but the snubber is doing it's job. I only took the maiden voyage for a short distance but HOLY CHIT the torque is nuts, didn't really step on it that hard yet either. Has anyone tried anything that worked ccorrectly? As far as the shake down went, well I have a terrible midthrottle that I need to cure, brakes are an issue fo sure, ATV muffler is abnoxius according to the wife ( as loud as my Can Am Outlander, just had it left over from my 500cc polaris predator that I put an full HMF exhaust on), and a few more electrics to do for the lights, radio, and the stator needs to be hooked up. Any advise on any of the above?
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Unread 09-16-2012, 07:41 PM   #2
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Default Re: 99 CC BigBlock nearly done but.......

50 views and nothing? Thought there would some wealth of knowledge here
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Unread 09-18-2012, 07:32 AM   #3
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Default Re: 99 CC BigBlock nearly done but.......

Quote:
Originally Posted by gn386 View Post
As some may know I have done all of the conversion myself, cradle mods, exhaust, conversion of the previous propane fuel system to gas and all internal mods to the 21 hp Briggs. Built to run 6k rpm and should be near 35+/-hp or so I have neared completion of my build but I noticed that now I have changed the rotation of the motor it seems as the cradle torques up quite a bit. Original motor it would have twisted down but with the rotation change it rotates up. What has anyone done to rectify this? Or is it ok? Seems to be quite a bit excessive, but the snubber is doing it's job. I only took the maiden voyage for a short distance but HOLY CHIT the torque is nuts, didn't really step on it that hard yet either. Has anyone tried anything that worked ccorrectly? As far as the shake down went, well I have a terrible midthrottle that I need to cure, brakes are an issue fo sure, ATV muffler is abnoxius according to the wife ( as loud as my Can Am Outlander, just had it left over from my 500cc polaris predator that I put an full HMF exhaust on), and a few more electrics to do for the lights, radio, and the stator needs to be hooked up. Any advise on any of the above?
I don't think you changed the rotation--Club Car has that CW, CCW engine rotation thing--different rotation for different years. Does it go forward in F? I'm not a CC guy.

Rear disc brakes I'm thinking hard real hard about getting them.
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Unread 09-18-2012, 02:15 PM   #4
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Default Re: 99 CC BigBlock nearly done but.......

No the rotation has been changed, reverse is now forward. That was club cars intent when they did the whole reversal. SOB's
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Unread 09-18-2012, 08:00 PM   #5
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Default Re: 99 CC BigBlock nearly done but.......

Torque on the cradle should be from the tires....now you have way more power and lower gearing. Dunno maybe you need a traction bar for it of some kind or convert to solid joint there like some have.

I'm thinking atv front and I'd get disk brakes with it.

Exhaust is tough I just put a walker quiet flow on a clone and its not real quiet, but about like a larger engine lawnmower so not that loud. Having a tail pipe on a muffler helps a lot unless it is built not to such as a lawn muffler is. I might add a tailpipe it might be a lot quieter, I also have two stock mufflers I could try parallel. Is kind of fun to hear it though.
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Unread 09-18-2012, 08:30 PM   #6
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Default Re: 99 CC BigBlock nearly done but.......

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Torque on the cradle should be from the tires....now you have way more power and lower gearing. Dunno maybe you need a traction bar for it of some kind or convert to solid joint there like some have.

I'm thinking atv front and I'd get disk brakes with it. Looking for one now since that seems right. Anyone tried something that worked the best?

Exhaust is tough I just put a walker quiet flow on a clone and its not real quiet, but about like a larger engine lawnmower so not that loud. Having a tail pipe on a muffler helps a lot unless it is built not to such as a lawn muffler is. I might add a tailpipe it might be a lot quieter, I also have two stock mufflers I could try parallel. Is kind of fun to hear it though.
That's what I was wondering the solid mount, but will it shear the frame or is there a better solution. Domeone had to have the same issue....
Looking for one now since that seems right.
Anyone tried something that worked the best?.Gonna try a super trap style. I figured tha the baffles are limitless adjustment
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Unread 09-18-2012, 09:12 PM   #7
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Default Re: 99 CC BigBlock nearly done but.......

I don't read the CC posts as close since I don't have one, but imagine there are plenty of builds on them and what they did. I know its an issue with them and BB engines as well as high lifts.
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Unread 09-18-2012, 10:02 PM   #8
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Default Re: 99 CC BigBlock nearly done but.......

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I don't read the CC posts as close since I don't have one, but imagine there are plenty of builds on them and what they did. I know its an issue with them and BB engines as well as high lifts.
That's why I posted this but it seems as though I am the only idiot that has tried this. Have not found any and you see the responses, it's all good trial and error. Just found a transaxle that came up for sale so my issue might be cured.
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