RX7 FC S4 TPS SETUP | AEM
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styx1234
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Joined: 05/10/2020 - 19:45
RX7 FC S4 TPS SETUP

I have an S4 turbo 2 RX7 that i just finished installing an infinity in. The car is idleing fine but I'm trying to dial in the rest of the rev range. The S4 TPS only reads maybe half of the throttle range by design so i think this is causing some issues in higher RPMs. Since the infinity sees the throttle at 100% when its actually only part of the way open, I had to shift my VE table down so it doesn't try to run super rich as a temporary solution.

 

My question is how will the infinity react when the throttle moves past the "100%" reading. I'm assuming it will just continue to lean out as the throttle opens as it will be stuck at the largest VE value, which in my case is in the 70 to 75 range. Is there a good way to make the S4 tps work or am i better off modifying the throttle body to accept a full range tps?

AEM_NS
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Joined: 06/06/2014 - 09:31
TPS input requirement is one

TPS input requirement is one that scales TPS to be 0-100% of closed to fully open throttle position. If the TPS you're using doesn't do that, then yes, get a TPS setup that does.

styx1234
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Last seen: 3 months 1 day ago
Joined: 05/10/2020 - 19:45
If i change my VE table to a

If i change my VE table to a MAP based Y axis, will it still need to refrence throttle position for anything other then activating idle conditions? Is there anything going on in the background with throttle percentage I can't see?

David Back

AEM_NS
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Last seen: 9 hours 11 min ago
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Throttle is usually

Throttle is usually referenced for dTPS acceleration enrichment so the actual TPS rate of change is looked at, not the absolute TPS value itself. You'll probably get a higher dTPS value than normal since your TPS maxes out early but the dTPS reference is scalable. Besides simple on/off thresholds, I don't imagine it being a problem.