Post #623
Well, I ordered up my camshafts yesterday:
Inlet NRD 127: 296 degree, 480 thou of lift @ 104 degrees, 183 thou at TDC
Exhaust NRD 954: 143 thou @ TDC
They were made by Piper as development cams for an engine builder who was developing engines for National Hotrod racing. That's why the numbers don't match cams normally made by Piper. These made 230 hp on a high comp engine running twin 45m carbs.
Once I get these and check fit them, I'll be sending the head away for overhaul, new guides, re-cut seats, new valves, solid lifters and shimming etc. Upon consulting Brett Simms (An ex. Longman engine builder) I'm going to be sticking with the standard valve sizes (Other people on here have also said its not worth the bother upping the size) as they managed to get nearly 280 bhp on the standard sizes. I am going to get new valves though for peace of mind.
I still have no idea what sort of HP to expect from the finished engine, both the guys I have been dealing with for cams and headwork seem confident of 240+,which is nice
________________________________________
R H Davey Welding Supplies. I sell new and used welding equipment in the Hampshire area. I take on welding jobs in the evenings, ally casting repairs are one of my specialities but I can weld pretty much anything. PM me with your requirements.
Some of my services: (See my for sale threads)
Engine mount/chassis repair
Solid Beam Mounts BACK IN PRODUCTION
Harness bars