Hi,

I read that a Karman reading of ~1700 should lead to fuel cut.

I actually put my SAFCII on karman in monitor mode to see what kinds of readings I get. At idle, it reads 28 (sometimes going to 27 or 29, but pretty constants at 28). I also checked for max reading and hit almost 1600 with a few wot runs.

Is this useful for tuning, like do you want to get close to the max fuel cut reading to indicate that you are flowing a lot of air? Of course, you should look at a/f and egts, but if you don't have those gauges, can you use the karman reading for any insight?

Thanks,

FB

 

bump

 

Im doing alot of testing with the afc/wideband right now...and Im having a fuel cut issue right now. Ill set the afc to watch airflow frequency and see when the fuel cut hits.

 

Cool, please let us know.

Per other threads, the 1700 hz reading will vary depending on the atmospheric conditions.

Thanks,

FB

 

i have been hitting fuel cut, but on the AFC it didnt show anywhere near 1700, more like 16's.

 

air temp plays a role too.

bryan

 

Your an idiot

 

No but really I would like to know roughly when fuel cut hits if it is at all possible to get a semi close reading of when it happens. I believe, I may be wrong, that DSM's factory will hit fuel cut at around 1606 or at least thats when thier MAF's get pissed. Is this at all close to the Evo?

 

On my Evo 8, I usually read 1645 - 1665 at redline with no fuel cut ........but last night I actually recorded 1775 and still did not get a fuel cut........I find it strange, since most people state the 1700 limit..................(stock injectors, turbo, etc.)

Mario

 

i live in slc ut. but i get about 1700-1800 depending pump or race gas & i do not hit fuel cut.
i have 272 cams & 255lph pump. hope that helps, i ran a wideband w/out the fuel pump & w/cams & was about 10.8/1 to 11.4/1 afr in some spots on race gas!