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Double stack- hold the cheese - Printable Version

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+--- Thread: Double stack- hold the cheese (/showthread.php?tid=4284)

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Double stack- hold the cheese - PowerDubs_imp - 09-16-2021

As some of you know- our bikes have 32mm throttle bodies but neck down to 26-27 mm by inserting narrow velocity stacks deep into our TB to choke it down (sorry I forget the size exactly- been a while since I measured).

The TB themselves have a lip cast into them to accept larger ‘normal’ stacks as these same castings are used in several other bikes without the choking- meaning they have larger velocity stacks- even on much smaller bikes.

TSR has larger stacks for our bikes made that fit into the groove- but are pretty expensive.

I have had good results just by boring the ID of the stock plastic stacks- but as always, a hot rodder wants more.

Thing is- I try to be an intelligent hot rodder- and gain power without sacrifice. That is much more difficult.

To date- I have achieved 103whp and over 75wtq.

I could just get the TSR stacks to open up the breathing- would probably gain hp- but might drop a little tq.

What if I could possibly improve both?

That brings us to where we are now-

[Image: 1b953dac8caf9df826ff08b5045e66b5.jpg]


Many more expensive high end sport bikes have used dual stack for years now to have both high end flow but maintain velocity at lower revs.

Like anything else- it’s not that Honda wasn’t aware of this- they just didn’t see a need, or cost.

I’m pretty excited about this one.

[Image: 45248077da5b90edfb700709fe123a76.png]


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And where we are now as the 'before'-

[Image: 38f58eb25b1c3682e8747b7d18483c45.jpg]

Double stack- hold the cheese - PowerDubs_imp - 09-16-2021

[Image: 22949b0f7796b69c1b47ecfc010dbff8.jpg]


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RE: Double stack- hold the cheese - Phadreus_imp - 09-16-2021

PD, you have my nerdy Engineer side all jazzed up now...way cool stuff!

Double stack- hold the cheese - PowerDubs_imp - 09-17-2021

More preliminary-

[Image: 7904f29f550ce7aaa6d37ba12391f392.jpg]


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RE: Double stack- hold the cheese - E11even_Hunnit - 09-17-2021

Are you 3D printing this? If so, what filament are you using?

RE: Double stack- hold the cheese - PowerDubs_imp - 09-17-2021

Yes. I'll ask the shop.

Double stack- hold the cheese - tod.branko_imp - 09-18-2021

I'll be waiting and line for the product once it's past the R&D phase. Do we get forum discount?

'14 CB1100 STD 5 speed

RE: Double stack- hold the cheese - PowerDubs_imp - 09-18-2021

(09-17-2021, 09:35 AM)E11even_Hunnit_imp Wrote: Are you 3D printing this? If so, what filament are you using?


Shop responded- ABS

RE: Double stack- hold the cheese - E11even_Hunnit - 09-18-2021

(09-18-2021, 12:10 AM)PowerDubs_imp Wrote:
(09-17-2021, 09:35 AM)E11even_Hunnit_imp Wrote: Are you 3D printing this? If so, what filament are you using?


Shop responded- ABS


Shop responded- ABS
Nice!

Curious as to how you generated the cad model itself? I know Lidar technology is making 3D modeling easier these days but not sure if you made it yourself with measurements

RE: Double stack- hold the cheese - PowerDubs_imp - 09-18-2021

I am having a shop who has done such products for other bikes take care of the smart stuff.

I am just a simple monkey that will take the bike apart, install, and dyno.