philoM5
philoM5 None
Jan. 18, 2011 6:31 p.m.

I have an M5 that has metering ports on each header tube. I want to find a way to use these ports to A) balance the ITBs at idle.., and B) to make sure the AFR is optimal at higher rpms.

I did a search and couldn't find any products that have integrated 6 AF sensors in one package. Or is there a better way to achieve what I'm after ?

BMW sells a box that shows either a red or green light for setting up idle.., but doesn't offer the wider range capabilities that widebands do today.

Any feedback is appreciated.

Phil.


88 M5

alfadriver SuperDork
Jan. 18, 2011 7:38 p.m.

A simple infra red thermometer will give you a good answer to balance the throttles.

For WOT, 6 would be major overkill- the most you would need is the number of fuel control systems you have. 1 or 2.

philoM5
philoM5 New Reader
Jan. 19, 2011 7:34 p.m.

In reply to alfadriver:

Thanks Alfa.., I just bought an infrared thermometer.. Thanks.

My engine is sequential injection and have trims for each cylinder. But for WOT I'd rather use a wideband. But this is a pricey adventure !

alfadriver SuperDork
Jan. 19, 2011 7:56 p.m.

In reply to philoM5:

I figured on the sequential, or even a simple batch. But all injection systems calculate the injection based on one or two sensors- one or two banks. On an I6, bank 1 would be 1-3, and bank 2 is 4-6. That set up is fully in the computer.

Anyway, good luck with it! Sounds like a fun tune to make sure the idle is balanced.

Eric

Paul_VR6 HalfDork
Jan. 19, 2011 8:34 p.m.

I've had good luck using egt to do individual cyl trims. Though it really can smooth idle I've never noticed any gains up top with it. Max power afr can be pretty wide.

Never thought about using IR right on a header, pretty slick.

You'll need to log in to post.

Also on Grassroots Motorsports

Your Projects: Boosted and Flared E30 BMW

25 minutes ago in News

Another forum member put it best: “This build is absolutely mental. And I mean that in the best possible way.”

Concours d’Lemons: Showcasing the Best of the Worst and the Worst of the Best

2 hours ago in Articles

This year’s Concours d’Lemons celebrated two cars rarely associated with the glitz and glamor of Monterey.

You Need This: Gullwing Doors and Exotic Styling for Just $1500

4 hours ago in News

Meet some brown ’70s awesomeness.

Your Projects: Wide-Body, V8-Powered Porsche 944

1 day ago in News

Wing, flares, V8 swap and more!

Acura Unveils New Prototype Race Car in Monterey

2 days ago in News

Acura yesterday unveiled the new Acura ARX-05 prototype race car.

We're Back In Monterey for Car Week

2 days ago in News

And so it begins, another trip to Monterey Car Week.

Mark Your Calendars: August 18 Is Wear Your Helmet to Work Day

3 days ago in News

Wear your racing gear to work and win prizes.

You Need This: A Real 1LE Camaro

3 days ago in News

Chevy only built 62 1LE Camaros that year.

Little Car Show: Celebrating All Things Quirky and Small

4 days ago in Articles

As the name suggests, the Little Car Show is all about little cars.

Concours d’Lemons to Ruin Monterey Car Week Yet Again

4 days ago in News

What started as the anti-concours has transformed into a major event on the Monterey Car Week schedule.

You Need This: A Quite Eye-Catching Green Over Red Ferrari

4 days ago in News

Not your usual Ferrari color combo.

Your Projects: JDM Autozam AZ-1 Kei Car

4 days ago in News

What are the realities of importing a JDM kei car to the U.S.?

OUR SPONSORS

Grassroots Motorsports Magazine

Subscribe Today

Also get your instant access to the digital edition of Grassroots Motorsports Magazine!

Learn More
gsQRaoErsOFs61d5t454YN1TG9inAIR0