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Author Topic: Something wild  (Read 11679 times)

Offline Munamankeli

  • Posts: 67
Re: Something wild
« Reply #80 on: Apr 13, 2017, 09:01:16 »
Nice work man. Curious about the velocity stacks, did you smooth them out before install? I do a lot of plastic 3D printing and the layer ridges are pretty prominent, I'm wondering if it will effect the airflow (turbulence)?

So Ive read books about porting cylindehead and test results are showing that gas flow is better when exhaust ports are very smooth. Like polished exhaust port surfaces are most flowing. But in intake it doesnt go like that, usually polishing intake port doesnt improve flow. So I dont smooth them, im pretty sure that "rough" surface will improve airflow. I kind of know why it is like that but just cant explain it. Here is excample of that. Found it in some companys website. They r selling intake manifolds, airfilters and kind of stuff.

Offline Munamankeli

  • Posts: 67
Re: Something wild
« Reply #81 on: Apr 13, 2017, 09:13:28 »


Offline cxman

  • DTT SUPPORTER
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  • Posts: 2499
Re: Something wild
« Reply #82 on: Apr 13, 2017, 10:05:13 »
polishing the intakes is not good and old school thoughts

i use 60 grit in a mandrel to polish the insides of my intakes

smoother surfaces cause a low air flow band that allows the air fuel mixture to coalesce and reform droplets on top of

possible reversion

1978 CX650 Super Deluxe
1979 XS1100 Special
1974 xl350
1983 cx650 Custom
1973 cb750
1980 cb750
1981 cb650
1982 cb900 c
1974 kawasaki 350 bighorn
1983 GL1100 aspy full dress
1983 GL1100 Nekid
and a bunch of others

Offline Munamankeli

  • Posts: 67
Re: Something wild
« Reply #83 on: Apr 23, 2017, 11:16:58 »
Well, maybe new flywheel bolts next time  :o