I have been working too hard lately what with all the variations
of 3D intake manifolds layouts I have been doing for Jerry.

I need somebody that knows how to do spread sheets to take the
two lowest dyno curves off this torque chart and convert them
to HP curves in gif or jpg format. This is the best torque
information we have on 13B geometry peripheral port engines.

The HP formula is torque times RPM divided by 5252 of course.

Paul Lamar

Here is a plot of the lower curve using the data points I interpolated.
These are the XY points I used if you want to double check for accuracy.

I'm still working on curve +150

RPM X 1000      Torque (N-m)    ft-lb   HP
4               425             313.46  238.74
4.28            450             331.9   270.48
4.5             461.5           340.38  291.65
5               476.9           351.74  334.87
5.45            500             368.78  382.68
5.5             502.7           370.77  388.28
5.78            550             405.66  446.44
6               589.5           434.79  496.72
6.1             600             442.54  513.99
6.3             604.2           445.64  534.56
6.5             600             442.54  547.69
6.67            589.5           434.79  552.18
6.83            573.7           423.14  550.27
6.93            550             405.66  535.27

--
http://www.bob-white.com
N93BD - Rotary Powered BD-4 (soon)

Further along to perfect Bob.

Plot another 1000 RPM and we will have it.
Tracy is running a 73 inch prop and he is getting 7300 to 7400.
With a smaller dia. prop and a 2.85:1 PSRU we could be looking at 8000 RPM
with P-ports.

Paul Lamar
 
The Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2004 All world wide rights reserved.