Adding Fuel ???

PlumCrazyDaytona · Post by **PlumCrazyDaytona** » Fri Feb 01, 2008 4:26 pm

Mike I read in a post earlier that with the CAI tune if you run headers and hi flows you should add 5% fuel, but it did not say if this across all RPMS or just from 3k and up. Could you provide some insight on this? This was posted by johan in an earlier post

Thanks

Post by **mikel** » Fri Feb 01, 2008 4:32 pm

I would do it in all 3 ranges, and I would double check it with a wideband if not doing a custom tune.

PlumCrazyDaytona · Post by **PlumCrazyDaytona** » Fri Feb 01, 2008 4:36 pm

mikel wrote:I would do it in all 3 ranges, and I would double check it with a wideband if not doing a custom tune.

Thanks!! I will see what happens. Has anyone told you how great of a tool this thing is???

HemiHorsePower · Post by **HemiHorsePower** » Sun Feb 03, 2008 1:52 am

Hello ,
What's the best placement for the o2 sensor? Would a good spot be at the collector right before the cat?
Thanks
HH

HemiHorsePower · Post by **HemiHorsePower** » Sun Feb 03, 2008 1:55 am

HemiHorsePower wrote:Hello ,
What's the best placement for the o2 sensor? Would a good spot be at the collector right before the cat?
Thanks
HH

I have longtubes w/ 2 and 1/2 inch midpipes and high flow cats.

HemiHorsePower · Post by **HemiHorsePower** » Mon Feb 04, 2008 6:11 pm

oh really? thanks
im glad i asked
lol

Post by **mikel** » Mon Feb 04, 2008 6:30 pm

Sorry, you posted this on a Sunday, and we generally do not work on Sundays.
Sorry I missed it this morning.

If you have bought aftermarket headers, they should have bungs for the O2 sensors already welded in. it should be in the collector, right before the cats.

Charger250 · Post by **Charger250** » Tue Feb 05, 2008 6:50 pm

Do you need 2 wide band o2 sensors, one for each side? Does the programmer provide a/f ratio to provide us the results from the new o2 sensor, or do I need to go to a dyno shop?

Post by **mikel** » Tue Feb 05, 2008 7:20 pm

You need two narrow band O2 sensors for proper PCM function.
Widebands are used to see actual A/F ratio.

sickREDsierra · Post by **sickREDsierra** » Tue Feb 05, 2008 8:11 pm

sensor should be located in or around the collector, in the ten o'clock or two o'clock position, to avoid moisture from engine, if you are inserting a sensor for A/FR... <wideband>

Charger250 · Post by **Charger250** » Wed Feb 06, 2008 9:10 pm

mikel wrote:You need two narrow band O2 sensors for proper PCM function.
Widebands are used to see actual A/F ratio.

I understand the need for the different O2 sensors, but that does not answer my question.

Do I need to get 2 of them, one for each side?

Will the data logging on the tuner tell me the a/f ratio so I can adjust it, or do I need to go to a dyno shop for that?

Charger250 · Post by **Charger250** » Mon Feb 11, 2008 8:28 pm

Will the data logging on the tuner tell me the a/f ratio so I can adjust it, or do I need to go to a dyno shop for that?

johan · Post by **johan** » Mon Feb 11, 2008 9:00 pm

You only need one wideband, one sensor, two will not hurt but one will suffice.
The a/f pid dcx has is not an accurate measurement one modded vehicles. Cold air and exhaust will throw off that reading.

Charger250 · Post by **Charger250** » Wed Feb 13, 2008 9:16 pm

So after I purchase and install the one wideband O2 sensor in the headers before the cat, how do I measure the a/f ratio? Will the datalogging do this, or do I need to go to a dyno shop?

smoke74 · Post by **smoke74** » Thu Feb 14, 2008 2:39 am

you install the wideband check what your A/F ratio is and adjust the fuel according to the readings you get at wot. if there is a dyno shop in your area i would recommend doing a dyno tune session.

if you only have exhaust and cai just use the canned tunes.

Adding Fuel ???

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