Air/Fuel Ratio & HKS AFR Type D or L or Super HKS AFR

[pwpanas]

Originally Posted by priyesh12

Hey Guys,

I'm running my supra now with a 3 inch exhaust, cold intake, front mount, boost controller and fuel cut defender. I plan on running 17psi on stock twins and was curious if there would be an issue with my air/fuel ratio? So, should I buy one of HKS devices that regulate the air/fuel ratio? Or am I safe to turn up the boost when I want to go fast

What ratio should the mixture usually be at, if I decide to go with the regulators and of course I will have to buy and install a wideband with a gauge

Thanks!

That's a mighty strange set of upgrades. Why didn't you install a downpipe, per 'bpu' specifications? Which fuel cut defender are you using - a GReddy BCC I hope. What about adjustable cam gears, per bpu+++ specs? For bpu, an aftermarket exhaust is unnecessary (unless that upgrade was just for looks). Oh, and that cold air intake was a waste of money unless it cut through the 'shelf' for the oem airbox. Note: The oem intake box is already cold-air, so drop in a K&N filter and you're done.

What kind of fuel do you plan to run with 17psi of boost? That's too high, even for 93 octane pump gas.

Your oem maf, ecu, and O2 sensors will ensure your a/f is correct. Your problem with being "safe" is insufficient octane, not a/f.