My name is Clint & I have a modified SR20VE powered Nissan Primera P11 and am using a Bikirom as my ECU of choice. My P11 was the first to have a bikirom installed and my Tuner Paul 'The Alienprobe' & I had the normal teething issues you have when doing something new. Lucas was very helpful, working through each problem with us and the Bikirom is now, I believe, the best budget ECU for this engine. It has features that the standalone ECUs costing much more don't have.
The SR20VE is dual cam profile like VTEC & normally the cam-switching solenoids are earthed directly through the SR20VE ECU. We don't use the SR20VE ECU & instead use a P11 SR20DE ECU as the VE ECU has many compensations that make it difficult to daughterboard successfully. Most tuners in NZ use a daughterboard in the VE ECU but they cannot be used with an emulator unless you order special ROM chips. Even then you need special software & a chip burner so it's very hard for the average person to have a play themselves. The AFRS on the daughterboards are all over the show too, as the ECU fights to compensate.
Bikrom - all you need is a USB cable & the AFRs are rock-solid.
Here is the Bikirom wired into my car. Instead of plugging the solenoids into the ECU plug, they now go into the the Bikirom outputs (red wire). Simple, cut the wires & put a plug on them, if you look closely you can see another plug coming out of the ECU plug, that's so we can plug a standard VE ECU back in if needed. The blue wire plugs into a switch on the clutch for flat-shifting.
Here is a picture of the engine which has high compression pistons, headwork & cams from Kelford Camtech, modified Fujitsubo headers etc etc etc.
Here is the car on the dyno:
And the result, 150.5wkw from a 2 litre normally aspirated engine!
16 March 2009
Update:
We went to the dyno on the weekend at ST Hitec here in Auckland, the owner of ST Hitec is Soichi Taite who is ex-Nissan Japan & he has a great reputation as both an engine builder and as a tuner. The point of Saturday's exercise was to try different cam settings and we were able to fully tune for each cam setting we tried. Soichi had never encountered a Bikirom before but within minutes had mastered tuning with it & the result has blown me away. The Alienprobe had put a great base tune on & our top end was pretty much spot on but the dyno tune allowed us to tune all of those mid-range zones that are so hard to hit on the road. She feels very strong through the midrange now... we still picked up 2 kw up top too :).
Copy of the dyno sheet:
