Author Topic: 2014, 131", FLHXS, tw400g7, MVA, SE58, D&D Fat Cat  (Read 561 times)

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Online Prostock

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2014, 131", FLHXS, tw400g7, MVA, SE58, D&D Fat Cat
« on: August 10, 2017, 11:29:33 AM »
Bike came in for a new top end.  Pipe holding back hp.  Customer doesn't want to sacrifice any torque. He is highly considering a zilla.  Will post before and after when this happens.  Will be intersting.  On second trans, he blew out 3rd gear on first one.  Next one will be a grudge box strip with a zippers chain conversion.  I originally did not build motor.  Broke bike in on dyno.  Will retune after pipe using TTS, TTS interface, Wego3d, Herko.  Bike currently has SESTP.

Jims wheels
Timkin conversion
RP cylinders and pistons
214ccp F&R
152.40TQ
128.82hp

Scot

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« Last Edit: August 10, 2017, 11:49:37 AM by Coyote »

Offline cdonis

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Re: 2014, 131", FLHXS, tw400g7, MVA, SE58, D&D Fat Cat
« Reply #1 on: August 10, 2017, 04:38:27 PM »
Se 58 is staying?

Offline 1workinman

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Re: 2014, 131", FLHXS, tw400g7, MVA, SE58, D&D Fat Cat
« Reply #2 on: August 10, 2017, 06:18:53 PM »
I looked at the chart several times and the pipe is causing the shape of the curve . It makes about the same hp as a lc 124 but has a huge torque rise . I bet its a peppy ride with that much torque .  I was told to be honest with your self and build a engine that has a torque cure that you ride . I don't normally ride in the 6200 range ,  So I would give up a pinch of hp for more crisp throttle response .

Offline No Cents

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Re: 2014, 131", FLHXS, tw400g7, MVA, SE58, D&D Fat Cat
« Reply #3 on: August 10, 2017, 06:47:47 PM »
 get the Zilla, or a Dragula, or a Rush Wrath and I bet the mid-range and top end drastically change.
Hell this is a 131 and cranks 214 ccp's...it's definitely being held back.
08 FLHX 124" grocery getter, wfolarry 110 heads, CR630i cams, 158hp / 152tq sae

Offline Ohio HD

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Re: 2014, 131", FLHXS, tw400g7, MVA, SE58, D&D Fat Cat
« Reply #4 on: August 12, 2017, 07:22:42 AM »
Not knowing anything about the heads, and not saying anything negative about them, if they flow less than that motor wants, you'll also see that type of HP to torque relation too.
For the best deal on bike parts, call Calif Phil
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Offline HD Street Performance

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Re: 2014, 131", FLHXS, tw400g7, MVA, SE58, D&D Fat Cat
« Reply #5 on: August 12, 2017, 07:37:23 AM »
Its not so much the heads, they are not horrible. The cam is what it is. Bobbys words not mine, "if you want electric motor like torque use a 408".
That comes at the expense of a broader torque curve and horsepower. The pipe will also change things a lot.

Offline Ohio HD

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Re: 2014, 131", FLHXS, tw400g7, MVA, SE58, D&D Fat Cat
« Reply #6 on: August 12, 2017, 07:49:12 AM »
I agree Don, the Fatcat isn't cutout for that much motor. And to your point, not just one item can control the outcome.
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Offline HD Street Performance

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Re: 2014, 131", FLHXS, tw400g7, MVA, SE58, D&D Fat Cat
« Reply #7 on: August 12, 2017, 07:51:50 AM »
Oh now I see it is a 400, even more extreme.
Just a mismatch of parts.

Offline GMR-PERFORMANCE

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Re: 2014, 131", FLHXS, tw400g7, MVA, SE58, D&D Fat Cat
« Reply #8 on: August 14, 2017, 07:17:15 AM »
I have seen the Fat cat work very well even in setups that where less than stellar . HP wise its never going to be where its big brother is but then again that tq curve may fit X rider great .. no idea .. 
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Online Prostock

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Re: 2014, 131", FLHXS, tw400g7, MVA, SE58, D&D Fat Cat
« Reply #9 on: August 14, 2017, 10:05:10 AM »
The bike started out as a stage 4 103.  Great pipe for that application but he wanted much more torque.  Now his only concern is he does not want to lose ANY tq.  Even if it hits 140 square.  Have ridden the bike many times and it is a monster off the line and streetable, well, kind of :SM:  We will be playing around with some bigger pipes in the near future.

Scot