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

First Drive: Turbo ND MX-5

1 day ago in News

We hit the track with Flyin' Miata's latest power adder.

This Weekend at the Mitty: The Ultimate Auto Festival

2 days ago in News

Gates open this Friday for the Classic Motorsports Mitty at Road Atlanta.

ND Miata Turbo Kits Now Available!

2 days ago in News

Add 70 horsepower and 70 ft.-lbs!

What's the Plan, Man?

3 days ago in Articles

Thoughts on our racing plan for the year.

Meet the Rebels Who Started the Cannonball Run

4 days ago in News

Relive those desperado days through movie excerpts, and hear the real facts and wild stories from the legends themselves.

Up for Auction: All of Level 5 Motorsports's Hardware

4 days ago in News

It's a pro race team part out.

Can You Really Live With a Low-Buck Porsche 911?

4 days ago in News

For the past two years, on of our forum regulars has been chronicling his life with a Porsche 996.

Project Turbo Miata: Fire Fighting

5 days ago in Project Cars

We transfer the fire system to our new Miata.

Reader's Ride of the Week: Autocross Abomination

6 days ago in News

Classic British styling with a rotary engine?

AMX-Cessive

1 week ago in Articles

If you’re going to host the search for the ultimate street car, perhaps you should drive one yourself.

Chris Albin’s Flying VW Golf: What Really Happened?

1 week ago in News

What really happened to send Chris Albin's VW Golf flying?

Drive Cars From the Lane Motor Museum Collection

1 week ago in News

Love older, maybe slightly weirder cars? This event is for you.

OUR SPONSORS

Grassroots Motorsports Magazine

Subscribe Today

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

Learn More
lHaqxiC4u8CN77RGU1cAlWtBQXE9wJpV