Hi folks, I've just fitted a Skunk2 70mm throttle body (Alpha series) to my UK AP1 and had a couple of issues. Wanting to see if these are known things?

Firstly I couldn't get the TPS calibration (resistance reading) to match the OEM, it was 850 ish on the Skunk2 and 680 I think on OEM - which seems to be normal. The TPS pickup is rotated further round on the Skunk2 so there was no way I could get the correct figure even fully adjusted. Will this be an issue? I'll be getting the car mapped soon on a Link G4X so assume the TPS can be calibrated on it.

Secondly the throttle cable was extremely slack when left in the stock position, I've managed to get it reasonable but have the cable adjusted right at the end of it's thread.

I'm guessing these issues may be due to the fact the TB is designed to fit a number of Honda's?

 

Not sure if you've resolved this issue, but for anyone wondering: on a standalone ECU you can just throw the TPS on in any position, and calibrate the closed and open positions in the tuning software. You only have to worry about clocking the TPS to a particular voltage/resistance reading on the OEM ecu (or maybe a standalone ECU with a locked tune).

 

Yeah as you say the TPS was calibrated using the Link ECU as part of the initial set up so not a problem but does mean you need to be running aftermarket ECU to get the correct TPS range. The cable adjustment is ok too but just right on the limit.

 

Well for you and others on a standalone this wouldn't be an issue, but for others yes. I'd say if you were on an OEM ECU to contact Skunk2 if the TPS adjustment range doesn't give you enough rotation to get the correct value.

Alternatively, I'd imagine that simply using an inline resistor with the offset resistance value off the output pin of the TPS wouldn't also help with this issue. I haven't used this trick myself before, but something to keep in mind for anyone reading this and wants to try a potential quick fix.