Hey guys, I'm just curious if I could richen up my A/F ratio a little with an AEM FPR instead of the Vortech FMU. I have a test pipe and I am vortech S/C'd. The reason I ask is that I dont want to spend money on aftermarket engine management (VAFC, E-manage, AEM), and I want to keep my test pipe SAFELY on my car.

Thanks.

 

Do you have the stock 10 to 1 fuel or the upgraded 12 to 1 map avail from Vortech?

 

Even with the 12:1 he'll probably be running too lean like many of us Vortech guys. Seems to be a VERY common issue.

 

How lean in terms of AFR's are you guys talking about?

 

Stock Vortech kit I was at about:

RPMS - afr
5000 - 15
6000 - 13.5
7000 - 14.5
8000 - 13.5
9000 - 13.5

The lowest I got was about 13 @ 8800rpm

12:1 recalibration kit I'm about half a point lower across the whole band. It's better, but I dont consider 13 all that safe either with how hard I push this car on a daily basis. I'll have to go to VAFC or something very soon.

 

I'm not sure, it was manufactured 7/15/04. How could I find out? And do you think using the AEM FPR and upping the pressure a little within stock injector limits would help?

 

You will drop around one full point with the vafc.Its all a crude method but it does work.Ive been running a recalibrated fmu and vafc2 for over 15k now and its been reliable.Once the new aem piggy back is tried and trued ill be swapping over to that.

 

Looks like I'm heading down to Summit tomorrow to get a 12:1 recalibration kit.

 

But how would an AEM FPR and a 12:1 recalibration kit compare? Which would work better?

 

Anyone?