I spend a lot of my time working with people ....answering EFI install questions....debugging, tuning etc......I enjoy analyzing the data, helping to solve the problems, improving the tune.....it can be frustrating & confusing sometimes, but i do my best to hang in there until things work........and
It's great when things turn out right.... here are two recent examples.
My customer and friend Max, in Germany, installed an x-faktory EFI kit on his newly built 3.2SS (RHD EFI/ITBs, dual plug crankfire with COPs, hot cams, Bosch ignitors and pencil coils, etc)
He was nice enough to report back on his install/tune in his stellar 67S.....as follows:
“Hey Al,
We have just been on the dyno this weekend (see pictures). Amazing result: 278 HP at 87,8°F (31°C) air intake temperature and we didn't take the engine over 7300/min with 200/min hysteresis. I am very satisfied. At cooler air temp and a slight increase in rev limiter, we should easily get 300-320 HP. Thanks for all!!!.......The car is a weapon now. 900kg weight only”
And here's another recent install/dyno from Dan....Dan really impressed me with his approach...while waiting for his kit to be built and shipped, he researched how to install and tune EFI...asking lots of great questions prior to and during the install/tuning and even purchasing the Performance Fuel Injection Systems book written by Matt Kramer and Jerry Hoffman to round out his EFI education.
Dan has a 75 Carrera, now with an x-faktory EFI kit installed (RHD ITBs with M'squirt MS2 controlling fuel and spark) . i don't have pix of his 911, but he did provide me with a before/after dyno run (His engine was already pretty healthy for a stock 2.7S w/ssIs/Sport muffler).... here is Dan's feedback).......
"Hi Al,
Hope you are well .......
Attached are the before and after dyno pulls for my 75 Carrera 2.7, before is Bosch CIS and after is x-faktory ITB-EFI.
If you overlay the 2 plots (y axis is same in both, x axis very close), you can see the ITB-EFI improved low end and high end torque (and hp: hp = (torque x rpm) / 5252) while mid range was the same. So my driving sensation is the car now pulls harder out of the hole and then wants to keep revving as the rpm's build - no doubt the velocity stacks are helping at the top end.
Anyway, this has been a fun, learning filled project. Thank you for making this possible through x-faktory!
Regards,
Dan ...."
regards,
al