home brew furnace brazing

Theres what it looks like after it was brazed and ground down somewhat. I'll be surfacing it monday when I get a chance.

thanks
George

Far as what rod I used - I dunno it was what was handed to me to use to weld it.

Heres the back side. I hadda braze both ends/ sides cuz it was cracked all the way threw.

I even started porting it and polishing the chambers some what too.

Porting, are you going to race it ? Aren't you afraid of loosing low end torque ?

I know that some polish the ports too, but that give very little extra power, only suffers fuel consumption.

Bill

Far as loosing low end tq- I dont think I will. Im not port it really drastic. The runners arent being enlarged or the bowls for that matter. All thats really being done is the the short turn and cleaning up the casting flaws/bumps.
Im trying to get it to flow consistant threw the lift range with some good velocity.

Dont think the bowls or the runners can hogged out too much anyways since the valves are so small ( dont wanna buy or make custom valves for a tractor that doesnt turn any rpm's) But theres other tricks that can be done - back cut the valves and do a good valve job.

I dont think I'll have to worry about fuel consumption either. Every motor I have ported so far has dont better on fuel so far. ( if driven sanely race stuff dont count tho :) ) Im also raising the compression some what which will help efficency