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Throttle Body experience needed....

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Old Jan 22, 2017 | 07:40 AM
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that said,dont let a OEM t. body choke a good flowing set of heads
 
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Old Jan 24, 2017 | 08:10 AM
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Originally Posted by bwoltz
Few things to note.

Your desired HP should be limited by your heads not the throttle body.

It's possible to have too much intake flow and too much cam duration. Especially if the exhaust can't keep up.

If the heads don't flow, a bigger TB won't help.
Like sharpening your pencil, with a dull pencil sharpener....
Scott
 
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Old Jan 24, 2017 | 07:11 PM
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In 2008 Hd fitted all 96" tourers with 50mm throttle bodies. I would have at least that much tb on what you are doing. I'm betting HD had proof that a bigger tb benefitted the torque.
 
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Old Jan 28, 2017 | 12:00 AM
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Ordered the HPI 51mm after talking with Kirby and Scott. Should work out well.

David
 
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Old Jan 28, 2017 | 06:00 AM
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what size runners? 1.760" would be what ide use
 
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Old Jan 30, 2017 | 06:48 PM
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Did the 1.71.

David

Originally Posted by prodrag1320
what size runners? 1.760" would be what ide use
 
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Old Feb 4, 2017 | 10:04 AM
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100 in kit & 585 cams will need a stage 1 head port with 50mm TBI &/ 4.9g/s injectors __27797-07. To big head porting & TBI will be sluggish at low RPMs 1000 to 3000 RPMs. That is were your bike runs most of time on street. Bigger not always better!!!!
 
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Old Feb 4, 2017 | 01:41 PM
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I think we will be good, Stg 2 porting and a 51mm TB. I think we are two weeks out for some numbers.

David

Originally Posted by flanigans45
100 in kit & 585 cams will need a stage 1 head port with 50mm TBI &/ 4.9g/s injectors __27797-07. To big head porting & TBI will be sluggish at low RPMs 1000 to 3000 RPMs. That is were your bike runs most of time on street. Bigger not always better!!!!
 
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Old Feb 4, 2017 | 06:52 PM
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Originally Posted by TriSum
I'm trying to figure out if the $3-600.00 is worth the extra cost for the added HP.

Thanks,

David
I wouldn't spend $3k to get extra 5hp.
 
Last edited by 13RoadKing; Feb 4, 2017 at 07:01 PM.
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Old Feb 4, 2017 | 07:21 PM
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Originally Posted by 13RoadKing
I wouldn't spend $3k to get extra 5hp.
Would you spend 600?
 
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