Search results

Hi Rich, thank you for your reply. I have taken some photo's of my build but did not want to post here and hi-jack your forum. I think I might give a miss to filing the transfer ports as I am worried I might do more harm than good. I was into my build before you started your forum and...

Hi Creast, I have been following your build with great interest as I am attempting the same build for the same reason. Codiv 19 therapy. My last engine build was a Forest Edwards Radial and the scale of the Gordon Nano is driving me nuts compared to the Edwards.Your build is looking great and...

Hi Edwards Radial enthusiasts. I finished building my engine in 2015 and it has been running happily ever since on a Perry 2100 carb. At the time I emailed Gary Conley at Perry carbs. and described the engine and this is the model he recommended for the application. It has a throat dia. of...

Reply for hammerhead 2825 Hi Ken (I guess that's your name from your email address) and I stand to be corrected if I'm wrong. I wouldn't be to worried about oil supply to the crankpin and big end bearings if you have built your engine exactly to the plans. The crankpin bearing is a needle...

Hi Ken, when I discovered that the Perry # 302 or #205 listed in the Edwards plans were no longer available I emailed Gary Connelly at Perry Carbs. and described the engine I wanted to use it on and he recommended the Perry 2100. Gary was extremely helpful and within a couple of hours emailed...

Hi Daddio - valve seats are cut directly in 7075 aluminium heads and valve guides are phosphor bronze. Page 8 of build has pics of valve guides. Page 14 & 15 valve seats and valve seat cutter. Page 17 head and valve assembly. Cheers Brian :thumbup:

Nice to see your grinder up and running and grinding some lumps for your "Seagull". Have you or are going to have a build thread for this engine? I am currently procrastinating on my next build and tossing around ideas as diverse as a 14 cylinder radial to a single cylinder with rotary valve but...

Hi all - here are the photo's of the adjuster I have added to the cam follower. It is graduated in imperial so that four increments on the dial will move the grinding head 1 thou". The adjuster on the left lowers the rocking arm with the cam follower adjuster locked in place after initial setup...

Hi George and Shipdisturber. Thank you for your kind words of support.I am still tinkering around the edges and have added a micrometer adjustment to the cam follower to accurately dial in finishing dimensions of the cam lobe. This addition while not absolutely essential should add to ease of...

Hi all - well I finally got around to see if my cam grinder would work and all looks promising. I made a master cam from aluminium (just a made up profile for test purposes) and ground a 1/4 size cam from mild steel. Now that I know that it works I will do some tinkering around the edges to try...

Hi Charles, I did an almost identical setup for my master cam follower except that I used 1/2" steel plates for the jig and ground the follower on a flat bed grinder by rocking the pivoted top plate holding the follower to and fro giving a typically nice ground finish. I have not yet tried to...

Hi all At HMEM - my design it as you go cam grinder is now complete. It has been an interesting exercise in coming up with design solutions for each step as the project progressed. In an attempt to ensure that the contraption might actually work when completed I have incorporated as much...

Hi all - here's some pictures of where I am at. Not a lot to do but still some hours for me. I want to give a bit more downwards adjustment of the spindle to accommodate grinding wheel wear, slot the master cam drive shaft to keep master cam calibrated, a grinding wheel guard, grinding wheel...

This is the master cam follower. It attaches to a sliding vertical adjuster. The relief on the LHS is to provide clearance from a rear chassis cross rail in case it is ever needed to grind a large cam. Apparently a flat follower would work OK but I decided to grind the optimum 4 x the radius of...

Hi all - cam grinder is coming along nicely. About the only things left to make are the master cam follower (tomorrows job), a locating keyway on the master cam shaft, positioning collars for the rocking arm linear bearing, a terminal switch box for the motors,a guard for the grinding wheel and...

Thanks for your input Peter - have decided to start with 12RPM and trust that will be OK. I hope to get a bit more done later in the week.

Thanks Charles - I too am using 5mm HTD timing pulleys (15mm wide) 24 teeth on the master cam and chuck drive. I think I will settle on 12 RPM so off to my local bearing shop tomorrow for a 48 tooth pulley for the 6 RPM geared head motor. Cheers Brian

Hi John - Thanks for your interest - Charles is right about most home build cam grinders being ad hoc almost Heath Robinson type contraptions but all strive to duplicate a master cam into the actual and usually scaled down final camshaft. I could not find any actual plans for one and embarked...

Charles - what RPM are you going to turn the cam at when grinding. The geared motor I have is 6 RPM at the output shaft but my thought is to speed this up to 2:1 or 3:1 for 12 or 18 RPM. The only info I have been able to dig up was a machine running at 20 RPM. What are your thoughts? When I made...