This is part of a scan that I did on my way home last night, it was a second gear blast from 18 mph up to 86 ~ 7000 rpms.

Keep in mind the last data pull I had lifted the throttle and not had shifted to third.

The increments are 1 second each using Auto X Ray.

TPS -Speed-O2- RPM -Knock-BL- MAS-INT - Inj pulse
1.37 - 18 - .616 -2550 - 78 -126- 15 -128 - 6.6
2.25 - 33 - .743 -3675 - 78 -114-111-128 - 8.3
4.48 - 54 - .783 -5150 - 78 -128-243-128 - 10.1
4.48 - 74 - .756 -6375 - 79 -128-253-128 - 8.0
4.48 - 74 - .756 -6375 - 79 -128-253-128 - 8.0
.64 - 86 - .827 -4525 - 79 -128-253-128 - 6.7

The stock crap computer cant keep up and feed the auto x ray quickly enough to keep up to the 1 second interval data grabs.

How lean is .75x - .78x on a narrowband sensor?

Am I risking engine damage driving like this?

Why is it that I have had my Accel Gen 7 Dfi for almost a year and brought it to 3 shops that said that they could install and tune it and it is still sitting in the box?

 

Definately lean. But you already know that. It looks like the maf is pegging. Also, the inj pulse width decreases as the RPMs increase. That dont look right. I see in you sig its a 420. What size injectors? Are you doing the tuning? Have you talked to Alvin at pcmforless?
As far as what the A/F would be with a wide band I'm not sure, but its def too lean. As far as hurting the motor, if you keep your foot out of it you'll be fine.
Why can no one install your DFI? Is there no one up there capable? What do they tell you, that they can until you take it to them and then they tell you they cant?
PS they'll probably move this to the tuning section

 

Injectors are 27 lb. I bought 42 lb injectors to work with the dfi.


The places i went said no problem it will be done in a week or less, then suddenly push back the project several times till i have to pick it up. It seems to involved for these guys. Most say install it yourself and we will tune it.


Will be working on that myself soon.

 

FWIW I believe you need something different then auto x-ray. If its like mine it will only capture a max. of 30 shots at 2 per second for a total of 15 seconds.
Datamaster will capture 10 per second for over 40 minutes.

 

I agree, auto x is alright for checking it out but not the best choice for a tuning program. How are you getting datamaster to record for 40 minutes? When I talked to those guys they said that when using windows sometimes the program (dm)isn't allowed to record for greater lengths of time (mine will only record for about 4 min).My tuner pro rt will record for indefinite periods, and allows me to use the emulator.
I am not an expert what I can only say is from my own experience. Using an LM-1 (afr)@.850ish was giving/ showing 12.53, 820ish put it @12.73. I haven't tried to bring it to the supposed "magic" number. From everything I have read from real tuners the gain @ 13.00ish is minimal. Mine @12.73 feels like it is making good power. I really could not accurately tell you how lean .750-.780 is putting the afr. Because you show maf no.s (my exp. is w/map)I am not sure if that is a wot, pinned or ? Until I actually do some real track tuning I have left it alone. Personally I don't like the idea of extrapolating afr from 02 numbers. It also appears it was probably taking away some timing away from the knock counts shown. I think the best and safest way to tune or to know what you really have is to have an AFR meter (of some sort LM-1 etc.)and integrated with a program. The tuner pro rt allows me to emulate and have the lm-1 simultaneously in real time. JMO

 

First thing I'd recommend you do is switch to the $6E mask to get the 8192 baud comms, then use tunerpro RT for your datalogging. Magnus actually has a $6E car so the support is pretty much dead on.

The reason his injector PW went down was because his duty cycle is over 100%.. Look at the RPM. Remember it's batch fire injection.

You need bigger injectors, a better tuning program. MAF pegged? maybe, and I don't like MAF tunes but ski_dwn_it had some good runs with a MAF car for a very long time.

The 42lbs injectors may work with the 165 ECM. I had some stupid idle problems and off throttle problems with ford 42's on my last motor due to the batch fire. The PW was soo short at idle it was bouncing between async and quasi firing and ended up being a stone. The DFI
is sequential injection right? Shouldn't be too hard to wire up, plus it's MAP. I converted my vette from the same ECM as you (165 running $32B) to a '730 running $8D. Took about 1 hour for the repin, remove maf, install map, etc. Shouldn't take you much longer to do the accel.

-- Joe

 

I think with the Accel gen 7 accuracy and speed the 42 will work given the fact that the motor is 420 cubes. The reason I went with 42's and not 36's is because I plan on running at least 100-150 shot of dry nitrous somewhere down the road.

 

Read your plugs.....this is the ONLY way even with a WB02 you should know how your truely running. Sensors can get lazy.....and should only be used for a reference.

Pertaining to reference values, we typically used to shoot for around 820mv on our narrow bands, but again always pulled some plugs to make sure.

Also your logger is probably not recording enough events to give you a true discription of what is happening.


PS: Running 30# injectors with my DFI and 434.