Author Topic: SE 64mm Throttle Body on a 107 stage 2.  (Read 442 times)

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Offline Dave I.

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SE 64mm Throttle Body on a 107 stage 2.
« on: April 16, 2018, 06:07:46 PM »
Posted this on the other forum, but figured I'd try here as well since it seems more tech related.

I've got a 17 road glide, that currently has a 447 harley torque cam, thunderheader, tman no loss intake and power vision.  I am switching to chain drive and gearing down 5.5%.  I have rs468 and s&s 475c cams sitting here and I'm leaning towards the 475c.

I bought the SE 64mm throttle body and was going to put it on when I do the cam and other stuff. Being a harley part I figure it doesn't flow what an hpi would out of the box. Not sure how much better it even is than the stock tb. Is the se 64mm too big for a cam only 107? I did some reading and from what I found it probably would be with a TC, but with the m8 heads being so different I'm wondering if it would work. I am tempted to just try it anyway but if it's a definite no go I'll just toss it on the shelf for a bigger motor.



Offline Durwood

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Re: SE 64mm Throttle Body on a 107 stage 2.
« Reply #1 on: April 17, 2018, 04:13:29 AM »
There is only one way that I know for sure to find out, bolt it on and tune it. Speculation and Twin Cam experience doesn't apply.

Online 1FSTRK

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Re: SE 64mm Throttle Body on a 107 stage 2.
« Reply #2 on: April 17, 2018, 04:28:33 AM »
 :agree:
It is well know that the stock tb needs improvement, I have found no tests where a better tb was tuned back to back with a stock one on a stage one or two bike but I would do it in a heart beat if I own one just for the information.

Offline GMR-PERFORMANCE

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Re: SE 64mm Throttle Body on a 107 stage 2.
« Reply #3 on: April 17, 2018, 06:16:46 AM »
 :agree:

Testing is the only way to know.. Way back when in the early TC days we tested a 53, or 54 :scratch:  zippers unit on a stock 88 inch bike .  What we found was that nothing changed . Bike had a 203 or 204 cam in it and you could not see enough change to say that one was better than the next  too long ago now to recall everything spot on   .. Now along comes the M8 and its back to the drawing board and start the testing over.

M8 is nothing like the TC and that is very clear .  Run the cam you want tune with stock then back to back on the 64  :up: :up:
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Online 1FSTRK

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Re: SE 64mm Throttle Body on a 107 stage 2.
« Reply #4 on: April 17, 2018, 12:13:58 PM »
I agree with Steve, the M-8 is nothing like the Twin cam or any other big twin HD ever released.The Twin cam head were lacking in stock form but the M-8 head flow more than the stock engine could ever use.

Offline jbroski

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Re: SE 64mm Throttle Body on a 107 stage 2.
« Reply #5 on: April 17, 2018, 04:35:16 PM »
64 will offer more performance. Ported manifold and velocity stack from ward performance  even more gains. I've ran stock, hpi, se 64, se 64 w/manifold. Ported manifold is above and beyond. If it doesn't work I'll buy it back.

Offline Dave I.

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Re: SE 64mm Throttle Body on a 107 stage 2.
« Reply #6 on: April 17, 2018, 05:42:05 PM »
What size engine? I have the velocity stack on the way from tman for the 64. I've heard Ward will match it up to his work.

64 will offer more performance. Ported manifold and velocity stack from ward performance  even more gains. I've ran stock, hpi, se 64, se 64 w/manifold. Ported manifold is above and beyond. If it doesn't work I'll buy it back.

Offline Dave I.

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Re: SE 64mm Throttle Body on a 107 stage 2.
« Reply #7 on: April 17, 2018, 05:46:56 PM »
I'm planning to take to RC cycle in Hayward, CA. To do the install and dyno it. They have a really good reputation in this area. I'll have to talk to them about tuning it both ways and see what they say. Just waiting for the rest of the parts to show up. Hoping I dont regret ordering the fueling oil pump and cam plate.