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Discussion Starter · #1 ·
Hey guys does anyone have engine builder specs for a 1993 Polaris Indy 500 Classic. I bought this program to make my own pipes but I need some info that is becoming insanely difficult to find. It would be awesome if someone can help me. [baldy]THis is what I need


This is the data I need for my custom Pipe to be made
1. Exhaust open period (deg)
2. Main transfer open (deg)
3. Secondary Transfer open (deg)
4. Rear boost port open (deg)
5. Target Power developed in Hp
6. Target RPM @ peak HP
7. Exhaust Port Diameter (mm)
8. Exhaust Exhaust port and gasket length (mm)

If anyone is interested in making your own pipe here is the link

http://www.buildandclick.com/index.html
 

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Sounds like he commercialized this guy's freeware...

http://www.mh-aerotools.de/airfoils/javapipe_en.htm
 

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Discussion Starter · #3 ·
So you mean I got hosed lol would anyone have a link of where to find this info, My Polaris dealer gave me the its inventory time month end and year end all in the same week story...lol and Polaris Canada tells me all they have to do is put a dealer "ask polaris" email in
 

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I suspect that you may end up getting a depth gauge and degree wheel, and DIY..
 

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Discussion Starter · #5 ·
#7 and 8 I measured with the depth guage, but how do you measure with the degree wheel? Sorry new to this stuff
 

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You set the wheel to 0 degrees at TDC, then rotate the crank noting the degree positions where the ports open and close on that cylinder.

Wheels only go to 180 degrees, so it's either degrees before, or after, TDC.

Once you know that, you can see how the timing works for the ports, and understand why raising a port can effect the timing.
 

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No luck? That's a known method...

Are you misunderstanding the concept of how to take the measurements?
 

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Discussion Starter · #10 ·
Im trying to grab a degree wheel, and I am having a little trouble understanding, do I measure on the 1st cylinder or on both? Also I dont know what numbers 2, 3, 4 are or how to measure them. THis is my first time getting this in depth with an engine..lol
 

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You only measure the #1 cyl, the others are assumed to be the same.

If you look on the opposite side of the cylinder from the exhaust port, you'll see the #2. If you see additional ports at different levels, that will be the 3 and 4. I've never looked inside a 500 jug, so I couldn't tell ya if it has 3 and 4.

To measure port opening, it is the as the piston goes down After TDC.
 

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Here's about 8 seconds searching...

http://www.rcfaq.com/ANSWERS/ENGINES/TIMING.HTM

I found that and more by searching google for "using a degree wheel 2-stroke".. I tried posting the google link, but it won't come out right.
 
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