Some Saturday Motor Fun
02-06-2017, 07:47 AM
#31
Platinum Member
Platinum Member
I can reduce valve size in a bbc build in the dyno simulator, and gain low end torque, at the expense of upper rpm power. Seems to make sense, as thats why Gm used small valves in their tow engines. Whoever wrote the simulation software, must also be aware of the net result of valve diamter and velocity changes
02-06-2017, 10:10 AM
#32
Registered
Not really. I have prob around 300-400 invested in these software programs.
The latest camshaft software , can really demonstate head velocity characteristics, by adjusting valve size, throat size, valve lift, etc.
The latest camshaft software , can really demonstate head velocity characteristics, by adjusting valve size, throat size, valve lift, etc.
02-06-2017, 10:21 AM
#33
Registered
Sure seems like you'll have a fun reliable boat. Nice looking also. Appears you have all your ducks in a row. Just keep an eye for any reversion.
Last edited by getrdunn; 02-06-2017 at 10:25 AM.
02-16-2017, 07:04 AM
#36
Registered
Thread Starter
Was hoping to post some dyno results by now but had a little scare Monday morning. They called me and said 3 holes had 0 compression and 5 had 160 lbs. Not the best way to start off your Monday morning. So finally yesterday I found out 3 of the lifters were pumped up or something and were keeping the valves open. I have been cringing at what I had done wrong or I had bent valves for some reason. I probably turned this engine over by hand a few dozen times just checking things. The lifters were the Howards 91162 which I believe are the Morels just re-branded? These are the .750 roller hydraulic race version. Now I have never ran a hydraulic cam has anyone ever had this happen before? I live in Sparks with a Summit so my wife was able to go and exchange them for a brand new set as the motor is on the dyno. That was a positive.
02-16-2017, 07:40 AM
#37
Platinum Member
Platinum Member
is it okay now, maybe the valve lash was off
