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**NEED HELP CHOSING THE RIGHT CAM FOR MY TC88B w/BB 95" **

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Old Nov 4, 2011 | 12:59 PM
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Talking **NEED HELP CHOSING THE RIGHT CAM FOR MY TC88B w/BB 95" **

I am installing a complete 95" Big Bore kit on a 2001 TC88B carb motor

I need help picking the right cam please! Ones that will allow me to use the stock length pushrods & stock lifters - Below is a list of what I have.
  • matched cylinders to Flat top forged pistons - bored 3.8755"
  • Ported and polished 06 heads 9.85:1 depending on the head gasket thickness ?? - with over sized valves and a 3 angle valve job with the stock Beehive springs - all new internals, seals, guides, etc, etc.
  • I am installing the new cam plate upgrade kit and keeping a chain cam setup
  • I have a set of CVO 253 cams on the bench, but im not sure the chain gears on them are right, they look to thick, and I'm not sure these cams are the right choice.
Im trying to build a bar hopping hot rod on the cheap...


Thank you in advance for your help!

Nate
 
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Old Nov 4, 2011 | 01:11 PM
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Ya can't go wrong with Andrews 37s
 
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Old Nov 4, 2011 | 06:40 PM
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Originally Posted by krazn8
I am installing a complete 95" Big Bore kit on a 2001 TC88B carb motor


I need help picking the right cam please! Ones that will allow me to use the stock length pushrods & stock lifters - Below is a list of what I have.
  • matched cylinders to Flat top forged pistons - bored 3.8755"
  • Ported and polished 06 heads 9.85:1 depending on the head gasket thickness ?? - with over sized valves and a 3 angle valve job with the stock Beehive springs - all new internals, seals, guides, etc, etc.
  • I am installing the new cam plate upgrade kit and keeping a chain cam setup
  • I have a set of CVO 253 cams on the bench, but im not sure the chain gears on them are right, they look to thick, and I'm not sure these cams are the right choice.
Im trying to build a bar hopping hot rod on the cheap...


Thank you in advance for your help!

Nate
A rip-roaring bar hopper @ 9.85 cr ain't happening.
That's a perfect ratio for a bagger-build 37 cam.
100 plus degree weather, running on garbage-gas.
If you upped it to 10.75, a Wood 8 cam, and as long as the heads are up to it, now your talkin' about a bar hopper........with teeth.
Scott
 
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Old Nov 5, 2011 | 08:26 PM
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Originally Posted by krazn8
I have a set of CVO 253 cams on the bench, but im not sure the chain gears on them are right, they look to thick, and I'm not sure these cams are the right choice.
Im trying to build a bar hopping hot rod on the cheap...
The TC88 silent chain drive had thicker sprockets and a fatter chain than the later roller chain drive. So your cams are the right ones in terms of fitment, but the wrong ones in terms of what you're trying to get out of them. I don't know of a particularly good application for the 253 cams, they've got a goofy profile.

If you're at 9.8 or so, the Andrews 37s mentioned already would work well.

Are the heads already done? Have you considered having the combustion chambers resized a bit? You could keep the flat tops, and not have to do any more cylinder work, and still be able to run more of a hot rod cam if you brought your compression up a little.
 
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Old Nov 6, 2011 | 12:53 AM
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Did 01's have bee hive springs?
Did you have the guides cut down to allow a higher lift cam? If so, you've got more options. I'm probably the only guy around that still likes S & S cams, but the 510 works fine with your build and the 570 would as well, but it would have to be gear drives and you'd need new pushrods. As mentioned, the 37's are pretty common for that build. Bob Woods 6 cam, not the high lift one, bolts right in and is pretty good too.
 
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Old Nov 6, 2011 | 01:01 AM
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Originally Posted by ctjstr
Did 01's have bee hive springs?
Did you have the guides cut down to allow a higher lift cam? If so, you've got more options. I'm probably the only guy around that still likes S & S cams, but the 510 works fine with your build and the 570 would as well, but it would have to be gear drives and you'd need new pushrods. As mentioned, the 37's are pretty common for that build. Bob Woods 6 cam, not the high lift one, bolts right in and is pretty good too.
I like the SnS cams too, several of which are available in chain drive for the TC88 motor. I'm pretty sure the 570 cam is, but the 510 might not be. Another SnS cam worth a look is the new 509 camset, which was developed as a torque cam for the touring bikes.

01 heads had the dual valve springs, but the OP has 06 heads with beehives.
 
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Old Nov 6, 2011 | 06:22 PM
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oops...missed the mention of the 06 heads
 
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Old Nov 7, 2011 | 10:56 AM
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The SnS 570 would be a good fit. Assume you are installing the "hybrid" cam plate upgrade package and not the complete OEM kit of parts that would require conversion cams? IIRC, the 570 is available in Easy Start or conventional configuration for the early models and gear drive only for the 07 and later models.

There are plenty of cams to choose from with intake close events from 38* to 42*; that is where I would be looking anyway. Woods 5-6 or 6; TMan 525/555/590, Andrews TW37, SnS 570, etc.; all good performers.
 
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Old Nov 8, 2011 | 05:18 AM
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Originally Posted by Hillsidecycle.com
A rip-roaring bar hopper @ 9.85 cr ain't happening.
That's a perfect ratio for a bagger-build 37 cam.
100 plus degree weather, running on garbage-gas.
If you upped it to 10.75, a Wood 8 cam, and as long as the heads are up to it, now your talkin' about a bar hopper........with teeth.
Scott

................or the Wood 9B, we used in the American Iron Magazine build.
117 hp SAE, with a S/E air filter. With our Green filter, it was over 120.
Scott
 
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