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98 or 117 or ??

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Old May 6, 2014 | 09:17 AM
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Default 98 or 117 or ??

My engine at the moment,

Stock cams.
Johnson Hylift lifters.
SE Cam plate upgrade.
SE Push rods.
MMI / PC3USB.
Ture Duals.
Ness Big sucker intake.

After some head hunting and lots of reading I've come down to two schools of thought.

I can do a 98 build with head work, really no need to split the case because it is a 2000 88TC so I have the Timken and the crank should have very little run out therefore I can go switch over to gear cams. (remove the worry of the cam shoes)

Or... Split the case for a 117 build, though the budget might hold me back from any serious head work.

Local builder said I would be crazy to split the bottom end, I could see the TQ (100+) numbers I want from a well built 98. 117 and bigger would be just bragging rights not making the best of what I already have. I could care less about HP, its a bagger.

I plan to do most of the work myself, only because winter here sucks and I need something to keep myself busy.
 

Last edited by TO34; May 6, 2014 at 09:30 AM.
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Old May 6, 2014 | 10:15 AM
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Tough call but I am thinking 98". If the parts are right, I think you can see 110TQ/HP from a 98" motor. I am debating the same thing for one of my bikes that is currently 95". Having built an all bore 107" for my bagger, I am leaning toward 98" on the softail; should have gone to 117" on the bagger; the additional cost from 107" to 117" is marginal.
 
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Old May 6, 2014 | 11:56 AM
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Just had recently recieved word that Thayers Sales and Service in Corfu, NY, tuned a clients 97"/our Stage III Heads/Wood 8/OE throttle body/Rhinehart duals to 114/115.
With a larger t/body, and a Fatcat, that same combo has shown almost 120 hp on a dyno in PA.
Scott
 
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Old May 6, 2014 | 12:19 PM
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Originally Posted by TO34
My engine at the moment,

Stock cams.
Johnson Hylift lifters.
SE Cam plate upgrade.
SE Push rods.
MMI / PC3USB.
Ture Duals.
Ness Big sucker intake.

After some head hunting and lots of reading I've come down to two schools of thought.

I can do a 98 build with head work, really no need to split the case because it is a 2000 88TC so I have the Timken and the crank should have very little run out therefore I can go switch over to gear cams. (remove the worry of the cam shoes)

Or... Split the case for a 117 build, though the budget might hold me back from any serious head work.

Local builder said I would be crazy to split the bottom end, I could see the TQ (100+) numbers I want from a well built 98. 117 and bigger would be just bragging rights not making the best of what I already have. I could care less about HP, its a bagger.

I plan to do most of the work myself, only because winter here sucks and I need something to keep myself busy.
Do you plan on keeping the MM injection?
 
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Old May 6, 2014 | 12:31 PM
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always budget question u can see 110 with a 98 with higher compression and a hot cam and u can see 110 with a low compression 117 with cheap gas
 
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Old May 6, 2014 | 03:37 PM
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Originally Posted by BVBOB
Do you plan on keeping the MM injection?
that is a damn good question... I've been trying to work that out in my head. I have not had any issues with the MMI once I put the PC3USB on it. Ive been told it would make tuning easier then a Carb.

I would like to go to a carb simply for ease of maintenance in the long run.

Advice would be helpful.
 
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Old May 6, 2014 | 05:20 PM
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i just make my 2000 rk carb 98 ci with andrews 57 2013 head port and 1.9 intake valve stock exhaust valve 2 in 1 supertrapp supermeg not dyno yet breakin period but night and day with 88 ci and andrews 26
 
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Old May 20, 2014 | 02:11 AM
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Need to get that 98 on a dyno Fidel I wanna see how that thing runs
 
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Old May 20, 2014 | 06:10 AM
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Originally Posted by TO34
that is a damn good question... I've been trying to work that out in my head. I have not had any issues with the MMI once I put the PC3USB on it. Ive been told it would make tuning easier then a Carb.

I would like to go to a carb simply for ease of maintenance in the long run.

Advice would be helpful.
HPI has single bore MM conversion t/bodys to accomodate a 117".
Scott
 
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Old May 21, 2014 | 10:44 PM
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Originally Posted by TO34
that is a damn good question... I've been trying to work that out in my head. I have not had any issues with the MMI once I put the PC3USB on it. Ive been told it would make tuning easier then a Carb.

I would like to go to a carb simply for ease of maintenance in the long run.

Advice would be helpful.
I just converted two of the MM's over to carb in May, both bikes had throttle body shaft bushing issues along with other things. I used the harness that Dan Thayer makes up for use with the Daytona ignition module (twin cam style) and used a early twin cam coil and plug wires, I also used the pingle tank plug and adapter with a pingle valve after drilling out the old lines. A carb manifold and a 42 mik easy kit to round out the package along with the Rivera cruise control bracket.
I am all for fuel injection and have tuned a few of the MM's with the PCIII and they actually do tune out very well but with the MM parts being discontinued I thought the money to do the carb was well worth it in the long run
Also one of the bikes is a trike conversion so dyno tuning would be costly if you could find someone with a trike dyno that was willing to work the MM. The other bike had it's PCIII fail and melt the front piston so the owner was already guy shy on buying another.
PM me if you need any part numbers
 
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