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Hey Guys,
I have been tuning my vt l67 on the1s enhanced bin, I am slowly ramping up the boost, I have a 2.8 inch pulley on at the moment and dialing in the AFR to 11.8.

In 2nd gear the AFR is pretty flat at 11.8 but in 1st gear it tends to spike rich (10.5-10.8) and then slowly creeps back up to AFR of 11.8 when I hit second gear and stays pretty flat at 11.8 all through the rest of the gears. How can I flatten out that 1st gear acceleration rich spike? or does this naturally happen because of the load in 1st gear? Would appreciate any advice thanks!

Whats thw MGC for both gears?

here is a log i did, you can see the comparison of 1st and 2nd gear.

Here is another log from 2nd into 3rd

Its acceleration fuel enrichment/tip in... however you want to describe it. You went from bugger all throttle to everything

Is there an adjustment for the acceleration fuel enrichment/tip in? Or looking at the log should I leave it as is?

Yeah there is

Look for the accel tables.

You are also pretty light on for timing as well, and a very flat curve

awesome, thanks heaps ill have a look

Hey guys, i played around with all the acceleration accels and still cant seem to get 1st gear to lean off.

But I pulled my pulley off and noticed alot of burnt rubber from the belt in the grooves of the pulley and also it has been spraying fine grains of burnt rubber from the belt onto the snout. Could this be belt slip? I am still using the stock 6 rib set up, i have changed the belt size to suit the 2.8 inch pulley. Is this why its running rich? because its slipping?

Could be. How well does the tensioner work?