Adding material to a port.
Posted: December 8th, 2009, 11:05 pm
Good evening Guy, i hope youre well.
I have a question if i may regarding the addition of material to ports in an alloy head.
Is there any method besides welding that you have used or would recommend?
I ask, because during some tests of an Audi 20valve head (4 valves per cylinder), i had been probing the intake ports and i had found that adding material ( plasticine) to just prior of the short side radius ie, raising the floor slightly gave me a good gain in flow, both in bare port flow and valve in flow.
The ports had been pretty much unresponsive to most other modifications with a small gain in flow noticed by some minor ssr adjustments and cleaning up, with the biggest gain being the reduction of the guide bosses, nothing spectacular but i suppose a gains a gain.
Because of the position the material would need to be added, tig welding is pretty much impossible due to the restricted access.
Mig welding may be possible but by no means certain.
I cannot see any epoxy type material holding on year in year although i have made enquiries so apart from maybe some kind of soldering i think im probably stuck with the ports as they were cast.
Many thanks for any advice you may be able to offer on this question.
Best wishes, Tony.
I have a question if i may regarding the addition of material to ports in an alloy head.
Is there any method besides welding that you have used or would recommend?
I ask, because during some tests of an Audi 20valve head (4 valves per cylinder), i had been probing the intake ports and i had found that adding material ( plasticine) to just prior of the short side radius ie, raising the floor slightly gave me a good gain in flow, both in bare port flow and valve in flow.
The ports had been pretty much unresponsive to most other modifications with a small gain in flow noticed by some minor ssr adjustments and cleaning up, with the biggest gain being the reduction of the guide bosses, nothing spectacular but i suppose a gains a gain.
Because of the position the material would need to be added, tig welding is pretty much impossible due to the restricted access.
Mig welding may be possible but by no means certain.
I cannot see any epoxy type material holding on year in year although i have made enquiries so apart from maybe some kind of soldering i think im probably stuck with the ports as they were cast.
Many thanks for any advice you may be able to offer on this question.
Best wishes, Tony.