E. g. 1968-1976 Suzuki T500/GT500 do not have squish heads. These engines are prone to pinging even in stock setup, not to mention in case of rebored cylinders with a comp tad higher. I was able to source aftermarket squish heads and I can ran far higher compression without pinging issues.
Over the first winter I had my T500 Titan I whittled new heads out of copper with more fin area and good squish I copied from a racing outboard same bore and stroke.
Great video. Keep up the good work. I like your comment about making the squish clearance too small increasing detonation risk. Have you tried calculating a squish temperature/pressure to identify knock risk?
If I had more data to analyze then I could attempt that, but it is complicated since its 4 factors are combined: jetting, ignition timing, compression, squish design
Aluminum was put onto the stock head and then its crude form was made to be like I envisioned. But I didn't notice any power increase. It just made the engine run cooler. Low RPM don't need the extra turbulence.
We run around 50% squish ratio on nitro rc boats and between 0 .3mm -0.4mm clearance,,allows max compression with less detonation,,need all the power you can get for boats lol
@@MichaelForrestChnl Around 18:1 or more static comp,,11:1 dynamic with 180-190 or more deg exhaust timing,,50-60% nitro methane fuel,,3.5 cc engine 35-40,000 rpm,7.5 cc 30,000,,15 cc 25,000.The speed record guys go crazy with intake and port timing/compression,,glow plugs don't last long lol
Interesting stuff. Thanks for posting.
E. g. 1968-1976 Suzuki T500/GT500 do not have squish heads. These engines are prone to pinging even in stock setup, not to mention in case of rebored cylinders with a comp tad higher. I was able to source aftermarket squish heads and I can ran far higher compression without pinging issues.
Squish bands reduce piston temperature which reduces deto possibility.
Over the first winter I had my T500 Titan I whittled new heads out of copper with more fin area and good squish I copied from a racing outboard same bore and stroke.
Great video. Keep up the good work. I like your comment about making the squish clearance too small increasing detonation risk. Have you tried calculating a squish temperature/pressure to identify knock risk?
If I had more data to analyze then I could attempt that, but it is complicated since its 4 factors are combined: jetting, ignition timing, compression, squish design
Good video.
I think Harry Kleem would agree with you as I do.
Interesting comment. (good read about Harry: jimmymacontwowheels.com/harry-klemms-the-dg-years-1975-1976-an-18-episode-motocross-series/
Great video. Are any of your spread sheets available to purchase?
please take a look at dragonfly75.com/moto/calculators.html
Which head did you put on the AX? Or, did you machine the original one?
Aluminum was put onto the stock head and then its crude form was made to be like I envisioned. But I didn't notice any power increase. It just made the engine run cooler. Low RPM don't need the extra turbulence.
We run around 50% squish ratio on nitro rc boats and between 0 .3mm -0.4mm clearance,,allows max compression with less detonation,,need all the power you can get for boats lol
what compression ratio and what max RPM?
@@MichaelForrestChnl Around 18:1 or more static comp,,11:1 dynamic with 180-190 or more deg exhaust timing,,50-60% nitro methane fuel,,3.5 cc engine 35-40,000 rpm,7.5 cc 30,000,,15 cc 25,000.The speed record guys go crazy with intake and port timing/compression,,glow plugs don't last long lol