High speed buggy project......

[jzemaxx]

Originally Posted by aqwut

that would be your best bet man, then again, it's all about aerodynamics and Power:Weight....

Are my calculations off?? Or should 12S and a 1527 be around 4300-4500 watts?? The motor will draw 100 amps minimum I would imagine. Doing to math that should be enough to push the buggy at least close to 90mph if not more. Right now I'm running the MMT with only around 3600-3700 watts and its heavier and less aerodynamic, and its not even getting hot at all. So 1hp extra should get me another 10mph or more right off the batt with the right gearing, plus I should be able to gear up more from there. Maybe my thinking is off...

[lutach]

Originally Posted by jzemaxx

Are my calculations off?? Or should 12S and a 1527 be around 4300-4500 watts?? The motor will draw 100 amps minimum I would imagine. Doing to math that should be enough to push the buggy at least close to 90mph if not more. Right now I'm running the MMT with only around 3600-3700 watts and its heavier and less aerodynamic, and its not even getting hot at all. So 1hp extra should get me another 10mph or more right off the batt with the right gearing, plus I should be able to gear up more from there. Maybe my thinking is off...

It will come down to gearing too. My BPP with 10S geared the same as 6S with the 1521/1Y at close to it's rpm limit pulled 4760 watts. You might see 100A, 80A or 200A. If you use the 100A 12S controller with the 1527/1D, you might kill your controller. Might not happen on the first run, but it will happen soon. I think that's the reason my HV110 failed, but the Schulze 40.160 is still going as it can deliver that kind of power and more.

[jzemaxx]

Originally Posted by lutach

It will come down to gearing too. My BPP with 10S geared the same as 6S with the 1521/1Y at close to it's rpm limit pulled 4760 watts. You might see 100A, 80A or 200A. If you use the 100A 12S controller with the 1527/1D, you might kill your controller. Might not happen on the first run, but it will happen soon. I think that's the reason my HV110 failed, but the Schulze 40.160 is still going as it can deliver that kind of power and more.

My 1527 is the 1.5D, which is only 1500 KV, so less then even my 1521 which is 1900 KV. The 1D motors are amp hogs and draw 200A's. I don't care for those motors...

[lutach]

Originally Posted by jzemaxx

My 1527 is the 1.5D, which is only 1500 KV, so less then even my 1521 which is 1900 KV. The 1D motors are amp hogs and draw 200A's. I don't care for those motors...

The rotor on the 1527 is also longer then the rotor of the 1521. Even if the 1527 has a lower Kv, it will require a little more power to get it moving. My 1521/1Y states a max amps of 75 for 30 sec., but it went all the way to 169A and my truck is lighter then your MMT. Your 1527/1.5D will be up there. I'm guessing over 150A spikes.