So I finally went into the dyno today to have my car read and I got AFRs anywhere from 11.04 to upwards of 13.39 . This was on a 4th gear pull in WOT.

I don't know what's going on. It was running fine when I was recording it on the street before in 3rd gear but I'm getting readings above 12.00 AFR after 5800 RPM and readings above 13.00 AFR after 6500 RPM.

I'm really worried about the engine now. I wont' be getting past 6000 RPM any time soon until I get the unichip that came with it retuned.

What do you all think?

It runs very safely until those points and runs around 11-12 AFRs otherwise on WOT.

 

Has anyone else with the full kit had these problems?

I'm running the stock full kit along with a non-revup lower plenum, 5/16" spacer, nismo headers, nismo exhaust, stock cats.

 

who did your tune?

 

it is the vortech stock tune with the unichip for the revup

 

no one here is using the vortech stock tune?

 

I think I may have figured out my problem.

The Vortech Full Kit is tuned for an otherwise stock Revup Motor.

The stock revup motor redlines of course at 7000 RPM.

My lower plenum is a non-revup lower colector. It is from an engine that is designed to flow at upwards of 6500 RPM.

I am having trouble with super lean AFR's (too much air and not enough fuel) at above 6500 RPM.

I think the problem ends up with my tune not being specified for the increased air flow othe non-revup lower collector and that is why I'm having the majority of my issues at the upper RPM rnages above 6500 RPM. What I'm going to do is change out my lower collector (although I'll be away from it unti January) when I get back to where it's store in January '09.

Until then I'll just drive the car under 6K RPM and it gets good clean AFRs under 12.0 all day long.

If anyone has experience with a stock full vortech revup kit and the unichip combined with a mrev2/mrev+/mrev or other non-revup lower collector please do chime in.

Thanks.

 

here's the dyno

 

I had the fuel injectors serviced today (as well as have the infiniti dealer tighten my belts) then did a few test passes in 4th gear.
I haven't datalogged them with my cipher cable yet but I did use my PLX wideband to watch it carefully the entire time...

hooray!!!

car runs rich the whole way now. I run AFRs between 10.5 and 11.0 the entire time all the way up. I'm going to do a datalogged run at a dyno here in town later this afternoon to get more data and be certain that everything is ok.

thank you all for your help so far.

 

new dyno just done today after cleaned fuel injectors.

Blue = run after just driving there. AFRs ran up to a high of 12.23.
Red = run after allowing engine to cool for about 20 minutes AFRs ran up to a high of 12.5.
Green = run about 5 minutes following the 2nd run. AFRs ran up to a high of 11.92

These AFRs are not off of the reading on the graph but rather off of my Cipher cable. The ones on the graph show the following:
Blue = high of 11.5
Red = high of 12.5
Green = high of 12.0

Overall I'm pleased with the tune that Vortech has provided. I know some finer tuning will probably allow me to take on increased power but that will undoubtedly require larger injectors ($700 installed), larger in-tank fuel pump ($200 installed), and finally an alternate method of engine management ($700-2000) with tuning ($800-1500)

That means anywhere from $2400 - $4400 more to get the car to a higher level which at this time I'm not prepared to do.

I'm having some problems with the filter being squished so that may be the next step is to find a more proper place for it sicne the AC lines, although already moved a bit, are giving problems crushing the filter.

 

for some reason these numbers are different when I pulled them up at home then when Carboy printe them out for me.

On the printout I'm showing
Blue = 317.8 = MAX Power ; 290.1 = Max TQ
Red = 318.5 = MAX Power ; 295.3 = Max TQ
Green = 317.5 = MAX Power ; 285.7 = Max TQ

The same with the intiial dyno. It was showing 322.xx = MAX Power ; 290.xx = MAX TQ .

It must be the settings I'm using in my WinPEP program that is causing me to show different values.

 

figured out that it was user error on the winpep software and I got it corrected :