[SoupraTT]

Hello,
I just wanted to get an opinion for the US MKIV TT guys about the tuning they have done with the S-AFC (blue screen). I have a Jap Spec TT and have the bigger (US 550cc) injectors. Now I got an AFC and was wondering what the average range of settings is (I suspect mostly leaning the mixtures). Has anyone gone over
-20 or -25% ?? I need to know as a benchmark for my tuning when I get to the dyno in 2 weeks. Certainly I am not stupid enough to plug in the values you give me but need to have a range to look at.
Thanks in advance
Andrei

 

[Brad Mayo]

There is such a wide range of what people have done that there really isnt any kind of baseline to start from other than ZERO. When i was on the stock turbos I'd richen it up on pump gas(+5%) to keep it from detonating then went back to stock settings for race gas. I did that tuning w/o a wideband so I'd imagine having one of those would help.

 

[SoupraTT]

S-AFC

Sure. I understand that there are a lot of combinations of parts and the S-AFC tuning is car dependent.
What I really wanted to know was the tuning capacity of the unit. For example. Can you fit 680 or 720cc injectors (up from 550) and lean the mixtures enough ?
The reason I am asking is that I have gone up from 440 (Jap) to 550cc (US) injectors and I need to lean out the car a the top. That's a 25% increase in injector size.
Thanks
Andrei

 

[theman]

I believe the S-AFC can handle 25% adjustment just fine if that is your main concern.