What the Mazda RX-8 should have been (new autocross car build) - Page 47

Nick M3 · 10-12-2022, 09:50 AM

Quote:

Originally Posted by John V

What would itbs have to do with vvt? If anything I'd want vvt more with an ITB motor

ITBs likely pushed them away from stock engine management. I'm guessing he also wanted a cable throttle, and I'm going to assume that the duratec uses DBW.

John V · 10-12-2022, 02:57 PM

If they're running aftermarket engine management, any decent one will have VVT capability. Regardless of whether a cable throttle or DBW is used.

For what it's worth, it's totally possible and easy to run ITBs (cable or DBW) with factory engine management. It's already been done in the NC MX-5 community.

Nick M3 · 10-12-2022, 03:06 PM

Quote:

Originally Posted by John V

For what it's worth, it's totally possible and easy to run ITBs (cable or DBW) with factory engine management. It's already been done in the NC MX-5 community.

Interesting. No one has figured out how to run cable throttles on DBW BMWs, in spite of a very well hacked factory DME.

John V · 10-12-2022, 03:09 PM

I kind of question why anyone would want to do it. There are so many advantages to DBW and no real downside.

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10-12-2022, 02:57 PM	#462
John V No more BMWs Join Date: Apr 2005 Carmudgeonly Ride: Ram, MS3, CX-5, RX-8 Location: Glenwood, MD Posts: 14,704	If they're running aftermarket engine management, any decent one will have VVT capability. Regardless of whether a cable throttle or DBW is used. For what it's worth, it's totally possible and easy to run ITBs (cable or DBW) with factory engine management. It's already been done in the NC MX-5 community.

10-12-2022, 03:09 PM	#464
John V No more BMWs Join Date: Apr 2005 Carmudgeonly Ride: Ram, MS3, CX-5, RX-8 Location: Glenwood, MD Posts: 14,704	I kind of question why anyone would want to do it. There are so many advantages to DBW and no real downside.