MSefi.com read only forum (Jan.15,2018)

A friend wants to run a megasquirt on a car with zoomies. Can this be done with the O2 sensor?
Thanks!

Not familiar with the term "zoomies" but it sounds like independent throttle bodies (ITB). MS-1 can do this, but MS-2 can do it much better as it has Alpha-N tuning. It sounds like you need to read a lot more as the 02 sensor cares very little as to what kind of induction the vehicle has, as long as it is placed properly.

It's possible, though you'd only get one cylinder. And you'd want to put it some distance from the end of the pipe. I'd simply tune it with a clamp on sensor and then run without an O2 sensor myself.

Matt Cramer wrote:It's possible, though you'd only get one cylinder. And you'd want to put it some distance from the end of the pipe. I'd simply tune it with a clamp on sensor and then run without an O2 sensor myself.

One down fall of the clamp on sensor like the innovate exhauste clamp is it wont let you tune idle mixture very well it will get some diluted outside air into the sensor at low engine speeds/loads. What kind of fuel is the car going to be running? I was told nitro cars are the only engines that can run them with out loosing power from the loss in scavenging from not having collectors.
ccbenz. "zoomies" are the individual pipe per cyclinder that funny cars use.

arlo#1 wrote:One down fall of the clamp on sensor like the innovate exhauste clamp is it wont let you tune idle mixture very well it will get some diluted outside air into the sensor at low engine speeds/loads.

True - just set your VE table to get the best vacuum at idle and ignore your AFRs at that point. We do this on cars with normal exhaust pipes too, for that matter.

Matt Cramer wrote:

arlo#1 wrote:One down fall of the clamp on sensor like the innovate exhauste clamp is it wont let you tune idle mixture very well it will get some diluted outside air into the sensor at low engine speeds/loads.

True - just set your VE table to get the best vacuum at idle and ignore your AFRs at that point. We do this on cars with normal exhaust pipes too, for that matter.

Yeh thats true, I even had to do that on the road runner (because of the wild cam I run) even you can tune the idle mixture by ear/smell and look for the most vacume (lowest kPa) I am hoping to be able to tune it to stoich at idle when I go to sequencial with ms3.