First of all I'll let you know I am new to any kind of tuning..

I finally had a chance to get my 9.5:1 2.0l ls vtec (currently naturally aspirated) on a dynojet to see the air/fuel. After adjusting the fuel pressure regulator and adjusting the timing, we got the air/fuel at a comfortable spot.

We have not messed with any actual ecu tuning yet. As far as I know I have a chip burnt on chrome with a p30 basemap upsized to 1.8l.

To me the dyno graph looks pretty crazy..


165.27whp 130.26wtq 104.16 *F humidity 8%
I recently built a nice and solid Ls vtec for boost..

•B18a1 Block
•84.5mm Darton MID Sleeves
•Shaved and Balanced LS Crank 34lbs to 30lbs
•Eagle H Beam Rods / ARP Bolts
•JE Forged Pistons low comp
•GoldenEagle Main Girdle
•ARP Head studs
•P72 GSR Head
•Skunk2 Forged Valves
•Skunk2 Springs / Titaium Retainers
•98 ITR Cams
•GoldenEagle Adjustru Cam Gears
•Edelbrock Victor X Intake Manifold
•Edelbrock 65mm Throttlebody

I am open to any advice you guys can give and I am able to use the dyno jet often free of charge.

 

Do you have a chart that shows air fuel ratios?
Your huge dip at 5500 rpms is because vtec is not set at the correct point..

 

Before vtec a/f stayed around 13.1 and after vtec it ranged between 13.1-12.8.

Do you have a good idea of where to try a diff vtec point? In about a month I'll have a real tuner here to assist me. I just want to try different things until he comes around.

 

Guess where the torque curve for the 2nd cam would hit the torque curve for the 1st cam. Maybe in the 4500-5000 range?

If I were you I'd get a real tune sooner rather than later.