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driveline problem...

  1. #1
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    Default driveline problem...

    I only have a few things to get finished before I hit the lake, my driveline is the big problem. when I bought this boat with a 455 it had a flywheel, the motor I built for it came from a car with a flexplate, I figured I would just swap the two and put the flywheel on this motor but had a thread about it and some said that might not be a good idea due to the balancing not being correct, so for breakin I left the driveline out, but now I need it to go to the lake. with the flexplate on, there is 1/4" of the crankshaft sticking out past the plate, my driveline is just a flat flange that originally bolted flush with the flywheel. would it be ok for me to make a 1/4" spacer to bolt between the two? if so should I use steel or would aluminum work ok? and what should I use for bolts, would black oxide work good? at the most it may have about 450hp and 600ish lbs of torque, but probably not even that much.I may put a light shot of nitrous at it if all goes well.
    thanks for the help, I would like to have it on the water this weekend.

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  3. #2
    Senior Member pilot940's Avatar
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    I had the same issue with my flexplate and ran washers (no good) Tom at JBP had an aluminum spacer that was made for the olds 455 laying around the shop. He may have another??? Give him a call. As for the bolts, I used 12point oxide bolts. The 12 point is a smaller head and gave more clearance in the joint. Give JBP a call.

  4. #3
    Senior Member SoldHondaBoughtHondo's Avatar
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    Quote Originally Posted by Adam View Post
    I only have a few things to get finished before I hit the lake, my driveline is the big problem. when I bought this boat with a 455 it had a flywheel, the motor I built for it came from a car with a flexplate, I figured I would just swap the two and put the flywheel on this motor but had a thread about it and some said that might not be a good idea due to the balancing not being correct, so for breakin I left the driveline out, but now I need it to go to the lake. with the flexplate on, there is 1/4" of the crankshaft sticking out past the plate, my driveline is just a flat flange that originally bolted flush with the flywheel. would it be ok for me to make a 1/4" spacer to bolt between the two? if so should I use steel or would aluminum work ok? and what should I use for bolts, would black oxide work good? at the most it may have about 450hp and 600ish lbs of torque, but probably not even that much.I may put a light shot of nitrous at it if all goes well.
    thanks for the help, I would like to have it on the water this weekend.
    Same deal with mine..just made a spacer...just make sure you torque the f..out of the grade 8 bolts..and lock tite wouldn't hurt
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  6. #4
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    Quote Originally Posted by pilot940 View Post
    I had the same issue with my flexplate and ran washers (no good) Tom at JBP had an aluminum spacer that was made for the olds 455 laying around the shop. He may have another??? Give him a call. As for the bolts, I used 12point oxide bolts. The 12 point is a smaller head and gave more clearance in the joint. Give JBP a call.
    I sent them a pm over the weekend because I have a part heading out today from there, never heard back so I am assuming they dont have anymore. I figured I will just have to make one.
    I was a bit worried about the spacer because of the suction housing but if thats what others are doing, then I guess I will try it.
    anyone see something wrong with going this route?

  7. #5
    Boat Nut sleekcrafter's Avatar
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    Adam, your on the right track, the spacers used to be pretty common items, and are harder to find as of late.
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  8. #6
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    Quote Originally Posted by sleekcrafter View Post
    Adam, your on the right track, the spacers used to be pretty common items, and are harder to find as of late.
    thanks bud, I am hoping to hit the water this weekend and make sure its ship shape, then to a mhb gathering so you guys can tell me every thing that I did wrong

  9. #7
    Breathing Diesel Shotgun19's Avatar
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    I have some spacers for BBC somewhere. I just make them, if you have a lathe and some aluminum you are all set. If you need one made just let me know and I will do it for you.

  10. #8
    mo balls than $cents$ IMPATIENT 1's Avatar
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    Quote Originally Posted by Shotgun19 View Post
    I have some spacers for BBC somewhere. I just make them, if you have a lathe and some aluminum you are all set. If you need one made just let me know and I will do it for you.
    well hey there stranger!

    why not jus put it in a lathe and cut a recess into the pto? i had to do that on my lsx pto

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  11. #9
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    Quote Originally Posted by IMPATIENT 1 View Post
    well hey there stranger!

    why not jus put it in a lathe and cut a recess into the pto? i had to do that on my lsx pto
    I dont have a pto, just a flat flange, I think its a old style, and its not to thick, so I was a bit worried about hurting it, (strength wise)

  12. #10
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    Quote Originally Posted by Shotgun19 View Post
    I have some spacers for BBC somewhere. I just make them, if you have a lathe and some aluminum you are all set. If you need one made just let me know and I will do it for you.
    Scott, I will try and call ya tomorrow if your not to busy, I just would hate to crack the s.h. my first time out. you guys gotta get back over here for some "pontoon action"

  13. #11
    Breathing Diesel Shotgun19's Avatar
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    Quote Originally Posted by Adam View Post
    Scott, I will try and call ya tomorrow if your not to busy, I just would hate to crack the s.h. my first time out. you guys gotta get back over here for some "pontoon action"
    I will call you when I am on the road, we have been hitting it pretty hard for a while now so the pontoon activies we are ready for !!!!!!!!!! gotta go back to the bar as well !!!!!!!!!! squeeeek still talks about it

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