3W 70 vs ZDZ 60
12-27-2002, 04:38 AM
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3W 70 vs ZDZ 60
rpm's really don't mean too much, differen't props give differen't readings. The 70 has more power than the ZDZ, plus it will swing a 26x10 prop with no hesitation.I fly the 3w 70 and it yanks my 35 pound Ziroli p-47 around with no problem.I broke the engine in on a 90 inch staudacher that weighed 25 pounds and it had unlimited vertical.My 70 with a mejzlik 24x10 is hitting around 7400 but I run my engines a little rich. Hope that helps
12-27-2002, 04:53 AM
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3W 70 vs ZDZ 60
you are getting 7K+ out of your 3W 70? Is it the rear intake version? I have the 70ius, side carb version. I thought most got around 6200-6400 with a menz 24x10, thought that the 26x10 was more for the 3W 75 , not the 70, anyhow, I have the 70 and its going on a lanier edge that should weigh 21-22 lbs, so hope it pulls it
12-27-2002, 01:54 PM
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3W 70 vs ZDZ 60
The ZDZ-60 and ZDZ-80 share the same bottom end, so the weight is just about the same. My 80 single will turn a Menz-s 24x10 at 7,000 rpm or a Menz-S 26x10 at 6,500 rpm. The throttle goes both ways..... 
12-27-2002, 02:22 PM
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3W 70 vs ZDZ 60
the 70 I have is the rear carb and is 3 years old sorry but the 7400 was a misprint I didn't proofread my reply,it should read 6400 with a 24x10 and I run my motors a little rich sorry! and yes I have run a 26x10 on the motor with no problems,don't know what the rpm's were though I never checked.
12-27-2002, 02:47 PM
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3W 70 vs ZDZ 60
when I tune my motors I usually top them out and then back them off about 200 to 300 rpm,that way I know I am safe.The Mejzlik prop turned right around 6700 to 6800 on my 70 but like I said I turn my high end out just a little more than most people probably do.I run Cactus Oil too and it has made a difference, motor runs cooler and the inside looks as if it was brand new still. I have been running the oil for 2 seasons this year will be the third season most people don't believe it but the oil has made a big difference in the performance of my motors.
