FW: Throttle Butterfly valve ramp

JShadzi at aol.com JShadzi at aol.com
Mon Dec 30 19:38:14 EST 2002

Jim, is there any provision in the throttle cam to provide a progressive opening, such as an ellipse or similar?  Each TB is designed for its application, even my VR6 TB with ramp could be considered jumpy, especially by stock standards, when you put such a big TB on a small displacement car, its always going to be an issue, usually why the factory chooses on the smaller side if they have the chance.

But of course, jumpiness comes with the territory when you're building a high perormance, well breathing motor with really fast response, just like everything else.  If you want a nice, smooth, stock, progressive response, throw some intake restrictions and exh. back pressure in there, they'll smooth things right out  ;)


>Having just switched to a Ford V8 TB at 65mm, no
>wedge, I can say it is a little different.  It takes
>some getting used to, but it's been fine so far.  I
>did have to add another spring to it to make the pedal
>stiffer, and that helps enormously with modulation.
>Stop and go traffic was easy.  The one area where it
>was real jumpy was at 80-85 mph.  One little crack of
>the throttle and you're in triple digits before you
>know it.  I was going to play with some different cams
>that I had, but they didn't fit to well.
>Jim Green
>'89 90tq 034EFI, Haltech IG5
>Do you Yahoo!?
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