tuning a dr kit
Posted: Sun Aug 03, 2014 9:14 pm
well the time has come for me to get the dremmel out, never tuned a cylinder/piston/cases before, got a new dr kit +descent exhaust 24/24 carb so any advice before i go too far
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tuning a dr kit
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Re: tuning a dr kit
Posted: Sun Aug 03, 2014 10:19 pm
Before any creativity I'd file the edges off all of the ports in the barrel, DR's have sharp edges! Also a quick hone to give 4thou clearance helps to stop piston seizure. Don't worry about the piston slap. BBQ painting the barrel black helps with cooling. 21 tooth clutch helps with top speed. Take your time breaking it in!
Re: tuning a dr kit
Posted: Tue Aug 05, 2014 9:17 am
Plenty of work to do on a DR barrel.
Lots of power outta it...
Lots of power outta it...
Re: tuning a dr kit
Posted: Tue Aug 05, 2014 9:45 am
before with small combustion chamber
After:
After:
Re: tuning a dr kit
Posted: Wed Aug 06, 2014 12:23 am
What a work of art! Am I looking at bridged exhaust ports? If I was the owner of DR I'd hire you on the spot!
Re: tuning a dr kit
Posted: Wed Aug 06, 2014 10:22 am
many thanks mate. lots of meat to grind.... And absolutely no risk of passing through...
Re: tuning a dr kit
Posted: Wed Aug 06, 2014 2:10 pm
spot on do you have a port map for the barrall
Re: tuning a dr kit
Posted: Thu Aug 07, 2014 11:30 am
unfortunately not. Engine has had different owners by now. Still running great.
Re: tuning a dr kit
Posted: Thu Aug 07, 2014 11:48 am
Pmax at 7600 rpm.
timing:
T:130°
E:185°
I: 195°
Re: tuning a dr kit
Posted: Thu Aug 07, 2014 12:49 pm
this one shows the main difference between opened ports and the shut ones.
