- Jun 7, 2005
Yes Andy. We have found several other head shapes that will produce more HP, but the old enemy of glow plug engines, detonation, rears its ugly head.
We are running the standard fuel everyone must use. It contains 20% degummed castor. Less castor down to 10% doesn't make any more power. PM your address & I'll send a sample head used on the .45 cu in pylon racing engine.Jim,
Is that a carbon type deposit on the two head buttons on the right?
It looks like the head temperature got really hot? Interesting picture.
Is there a formula for the right height and depth for the bowls? I would
like to try some new head button configurations on one of my friends
engine Dyno. We are trying to get the horsepower over 2 HP and improve
the torque readings higher on this next test session. This is for a 12-on-road
car engine in one of my 12-Hydros. It looks like you are running quite a bit of
castor in your fuel?
Thanks For Sharing,
I request information, i have a carbon rocket hydro 7.5 with cmb 45 hr and it is impossible to replace the engine with the v5 because the carb touches the sponson tube, with the v5 must move back the engineGilbert,
The V.5 parts will not retro fit to the HR. Best get a V.5 complete motor. It is a much better motor.
it is possible to put a cmb v5 or 45 rs evo but it is necessary to work the news engine mounts even with the use a novarossi 46dd, piston sleeve of hr are used, but I have a trick to regain compression, just do two revolutions with a tube cut in the lubrication groove of the piston, it pushes back the material and you have breaking engine with four tanksWould the RSEvo be a better fit?
Hello Jim.......from the pics I see, those heads appear to have closer to 50% squish band ratio than any I have seen posted. Also, does the rise from the squish have a straight side prior to the radius on the inside?Any sharp edge on the ID of a cylinder bore will cause the chrome to buildup on that edge. Careful removal, before chroming, of those sharp edges with an Exacto knife & brush hone eliminates this problem.
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I sent you a personal message with my address like you requested.
Thanks for helping us all out with this important information on everything you do
with your motors. IW is a wealth of information.
Thanks For Sharing Your Knowledge Jim,