Midtenn

iTrader: (15)

I've been running my 95 Miata on a Series 1 Plug & Play for many years now. I have good fuel and ignition map for my current setup using MAP and a single throttle body. However, I'm currently putting together a ITB/IRTB setup for my car to eliminate a weak point and give me some head room on future projects. From my basic reading on ITB/IRTB tuning, it is typically best to go with a throttle based (alpha-N) and MAP hybrid tune. Is there a route I can take to turn my current MAP only based fuel/ignition map into a hybrid MAP? How would I go about doing so?

If there isn't a simple route to turn my current MAP into a hybrid setup, what is the best way to start up an alpha-n/MAP hybrid map? From reading the documentation that comes with the Series 1, I don't see much, if any, about setting up a throttle based tune. Thanks.

mingle1158

you should use the tps fueling on this. using a map sensor in your setup is not the best idea because you have almost no vacuum at idle. Even if you made a "Manifold" it doesnt work that well on ITB's

aidandj

iTrader: (5)

Thats why you use a hybrid map. With a vacuum block.

Savington

iTrader: (31)

I think I would start with a full Alpha-N (TPS) tune and then blend a MAP signal into that after you have it fairly close to done. Your speed density (MAP) cal files will be basically worthless, unfortunately.