First exhaust port job.
5 Attachment(s)
Ok I need some input. I'm in the process of rebuilding my 12A. I decided to experiment on the old unusable housings. I didn't have a template or anything just free hand. I just tried to enlarge and retain the stock oval opening. The upper inside of the port is tapered upward. Basically just seeing if I could port at all. All opinions welcome!
|
Craftsmanship looks pretty good to me. :)
Exhaust porting is a black art. Paul Yaw uses a special rotary engine modeled flow bench to test his exhaust ports. It's amazing how the port shape and chamfer radii enhance or disrupt the flow. http://www.yawpower.com/Flow%20Testing.html I really want a flow bench now! |
Thx for the complement! :D That site is where I learned about keeping the 2mm bevel around the port.
|
Thats pretty clean, but you could prolly go farther up.
|
Well with this design, I'm trying to keep the engine somewhat emissions compliant. I may try something differant on the other housing.
|
All times are GMT -5. The time now is 07:04 PM. |
© 2024 MH Sub I, LLC dba Internet Brands