@frank horton Mention Blueprinting to young people and watch them glaze over....
I've used Newman for one-offs, he was really helpfull, took forever though.
How do you make the crank survive - it surely can't be the std one?
Lastly, on the porous race head - been there more than once - allways on the inside of the inlet port divider, short side radius - plastic metal is good, lasts well unless you boil the thing. I once had a head come back after a few seasons racing - cracked between the middle exhaust valves at the head gasket face - that one I drilled the top face, blast cleaned through the hole, heated it up on my ceramic hob and soldered it, then plugged the hole. It was sill racing last I heard.
@Stueeee what is the name of that company in Slough? I knew a couple of guys that worked in a similar place back in the 90’s.
Phoenix Crankshafts, as in 'Phoenix from the ashes' the 2 guys who started the company had previously worked for Allen Crankshafts and had left Allens following some kind of company upheaval.
I now have had 3 cranks done by Phoenix and 1 done way back when by Allen, always been superb work in my experience.
Blueprint! now there`s a word , basically building an engine to the original specs a manufacture has failed to achieve
Had a nice clean V8 crank index ground, ninty degree throws and the BE`s ended up 40thou under
Bob
bought a mild cam for my VW camper rebuild,anyway so dissatisfying,I’m sending it back ,all 4 lobes have differing dimensions to the tune of 0.012” the drive gear is made of aluminium,where the original is hardened steel,this is from a well known USA brand.
Be interested to hear from any experienced tweakers about the varying dimensions and how it can affect running,don’t think I’m keeping it anyway,just intrigued.
Another vote for Newman cams. They reground my 1948 Standard 12 cam (sidevalve) and refaced the tappets. Advice from the top man as well!Have a look at Newman cams , they have a good reputation and may be able to help
Sorry, but valve lift is the difference between base circle and lobe radii, minus valve clearance, on a cam that acts directly on the valve, or a fraction of it on rocker type valves.It's only the lobe lift that needs to be identical because the clearances are taken up with shims or lifters.
Sorry, but valve lift is the difference between base circle and lobe radii, minus valve clearance, on a cam that acts directly on the valve, or a fraction of it on rocker type valves.
If base circle radius is smaller then the measured lift base circle to cam peak would be smaller. The base circle radius needs to be deducted from that figure to give the true lift. Measuring the base circle is not something you can do with calipers because of quietening ramps.Sorry, but valve lift is the difference between base circle and lobe radii, minus valve clearance, on a cam that acts directly on the valve, or a fraction of it on rocker type valves.
Aah,so that could explain the smaller width?If base circle radius is smaller then the measured lift base circle to cam peak would be smaller. The base circle radius needs to be deducted from that figure to give the true lift. Measuring the base circle is not something you can do with calipers because of quietening ramps.