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Old 05-13-2008, 02:13 PM   #1
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Default VTPS a necessity?

My MSPNP should be hitting my doorstep TODAY! YEEEEA! So yeah, anyways, allllll excited, but some guys have been saying they believe it is a necessity that I (1.6) convert to a vtps as described in the MS FAQ. I was under the impression that this was a solution for some people who have the problem, or am I mistaken and this issue concerns any and all 1.6 users of MS?
If I need it, I'll be calling my friend today to find out what his price is on a BMW VTPS.

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-Ryan
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Old 05-13-2008, 02:17 PM   #2
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A necessity? Not at all. It can be helpful if you wish to do TPS accel, TPS-referenced EBC, or something fancy like that, for for most folks, the regular switch-type 1.6 TPS will be fine. Your accel fuel will be MAP-based. If you wish, you can probably still use TPS as a variable for decel cutoff, IAC cutoff, and so forth.
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Old 05-13-2008, 02:20 PM   #3
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I found it a necessity for my car, especially with A/C, likely due to an extremely lightweight flywheel.
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Old 05-13-2008, 02:31 PM   #4
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I don't have A/C... I guess I'll hold off on it for now and only do it if I have the off-throttle idling problem...
-Ryan
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Old 05-13-2008, 04:36 PM   #5
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Quote:
Originally Posted by ThePass View Post
I don't have A/C... I guess I'll hold off on it for now and only do it if I have the off-throttle idling problem...
-Ryan
Ryan, ive got a tps 201 that ben and many others use if you want to do that route, it would be a direct pnp with the stock pigtail. It just needs a bit of love for a perfect alignment on the shaft and all will be well. I didn't know that till i already picked up an automatic TB w/vtps sensor and took the well 201 off and looked at it.
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Old 05-14-2008, 09:33 AM   #6
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It's mostly helpful on cars that are using both an A/C and a lightweight flywheel, like Atlanta93LE. This helps the MSPNP determine that you've suddenly lifted off the throttle and makes it easier to deal with stalling while idling with the A/C on. Many installations do not need this; our red test mule car is not using one.
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Old 05-14-2008, 12:27 PM   #7
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The feature that Matt is referring to is the dashpot adder, at the bottom of the first Idle menu. When it detects that the throttle has closed suddenly, it adds a little bump to the IAC duty cycle to help it recover. Even with a stock flywheel and no A/C, for me implementing it meant the difference between the idle dipping to 500 or 600 before recovery (when lifting off and shifting into neutral) vs. pausing for a moment at about 1,500 and then settling down.
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