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Location:
Lost in the K hole
Registered:
May 2002
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Location:
Mentone
Registered:
May 2002
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Re: 7m Stock Cam Profile... *cool graphs*
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Mon, 25 August 2003 12:09
 
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Cool circle graph. how did you do it? Did you use a program like excel.
brad
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Location:
Epping, Sydney
Registered:
April 2003
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Re: 7m Stock Cam Profile... *cool graphs*
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Mon, 25 August 2003 12:15
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there is no denying it, they are very cool graphs 
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Location:
Lost in the K hole
Registered:
May 2002
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Re: 7m Stock Cam Profile... *cool graphs*
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Mon, 25 August 2003 12:31
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| purpleminiep wrote on Mon, 25 August 2003 22:09 |
Cool circle graph. how did you do it? Did you use a program like excel
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just whacked it all in excel...
the cirular graph was a stroke of luck - called a radar graph. turns out that when i set the Y axis range to include the dimension of the base circle diameter of the cam, the plot ends up completely (and being dimensionally accurate) representing the exact raw cam data that i collected in the first place - making it graphically representative of the 'actual' cam (excpet it rotates backwards...)
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Location:
Lost in the K hole
Registered:
May 2002
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Re: 7m Stock Cam Profile... *cool graphs*
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Mon, 25 August 2003 14:29
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fwiw:
using the specs i plotted above, i just jumped into my dyno software, and by playing with the cam timing as follows:
retarding EX cam 8 deg (now EVO 54.5deg BBDC)
advancing IN cam 6 deg (now IVO 18.5deg BTDC)
resulting lobe centre angle 108deg
valve overlap 39deg
ICA ATDC 109deg
ECA BTDC 107deg
I netted an extra 12hp @ 6500 (difference emerges @ 4500)
and an extra 5ftlbs @ 2500-4000, and 8-10ftlbs from 5500 to 7000
not bad for a nights work 
cheers
ed
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Location:
Melbourne
Registered:
May 2002
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Re: 7m Stock Cam Profile... *cool graphs*
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Mon, 25 August 2003 20:41
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Ok how about a GTE cam???
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Location:
Central Coast, NSW
Registered:
May 2002
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Re: 7m Stock Cam Profile... *cool graphs*
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Mon, 25 August 2003 23:11
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love your work Ed! Always taking that extra step for the 7M community 
Dan
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: 7m Stock Cam Profile... *cool graphs*
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Tue, 26 August 2003 00:06
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How did you get the graphs to do a nice smooth curve rather than the staccato point to point straight lines?
Good work.
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Toymods Social Secretary
Location:
Sydney
Registered:
July 2002
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Re: 7m Stock Cam Profile... *cool graphs*
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Tue, 26 August 2003 00:57
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excel has a couplle of funky features such as "line of best fit", "line smoothing", and the like.....
and cool work ed.
Now do we get to see what those "other" cams are like in comparison?
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Location:
Melbourne
Registered:
May 2002
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Re: 7m Stock Cam Profile... *cool graphs*
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Tue, 26 August 2003 10:14
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Some guys look at porn when there bored not Ed hes out with a dial gauge or hanging curtins in his gf's flat when he has spare time
Ed's (Dr Drapes?) the man! 
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Location:
melb
Registered:
May 2002
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Re: 7m Stock Cam Profile... *cool graphs*
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Tue, 26 August 2003 11:26
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they look a bit worn.
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Location:
Lost in the K hole
Registered:
May 2002
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Re: 7m Stock Cam Profile... *cool graphs*
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Tue, 26 August 2003 12:25
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worn??
if youre referring to the hopelessly 'soft' cam uptake slope, thats just toyota's idea of an economical street cam....
the little irregularities in the plot surface are just errors in either cam rotational position, or the dialgauge jerking around a thou or so...
im pretty damn sure theyre not 'worn'
cheers
ed
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7m Stock Cam Profile... *cool graphs*
