ALFAGTV6.COM

Greg Gordon · Post by **Greg Gordon** » Mon Oct 15, 2007 5:59 pm

I just thought I would show our crank position sensor mount. It's very strong, you can easily lift the engine with it. It can be removed for belt changes and reinstalled without upsetting the adjustments. Overall I am pretty happy with it. We have a few variations, GTV6, Milano, with A/C or without...

The crank sensor mount is the most critical issue with SDS. If it vibrates, it's bad news, that's why it has to be so strong.

Greg Gordon,
www.hiperformancestore.com

ar4me · Post by **ar4me** » Mon Oct 15, 2007 6:09 pm

Is it more critical than on the Motronic V6?
Jes

x-rad · Post by **x-rad** » Tue Oct 16, 2007 4:47 am

greg: what kind of pickup....dual magnet? single?

Greg Gordon · Post by **Greg Gordon** » Tue Oct 16, 2007 6:08 am

Jes: I suspect they are both equally critical, however it's a lot more trouble to adapt a toothed wheel to a 12 valve car. Of course if you are starting with a Motronic car you already have a toothed wheel and a factory sensor mount so it's a non issue.

x-rad: quad

Greg

x-rad · Post by **x-rad** » Tue Oct 16, 2007 2:33 pm

Greg, how do you get a home signal from your quad setup for a six cylinder?

quality looks excellent by the way..

Mats · Post by **Mats** » Tue Oct 16, 2007 9:54 pm

Wasted spark? Wouldn't need a phase sensor.

x-rad · Post by **x-rad** » Wed Oct 17, 2007 5:55 am

I figure if with a crank sensor this nice there woul be a home signal and individual port injection timing ;no teeth so count by magnets?

otherwise you would only need one mag ...??..

what is really cool is the Haltech dual channel Hall sensor for crank position magnets:

http://www.spooledmotorsports.com/halte ... nsors.html

Greg Gordon · Post by **Greg Gordon** » Wed Oct 17, 2007 6:10 am

Whoa, OK, I think I misread x-rad's question, and I am not familiar with the term "home" in regards to sensors. To clear all this up I will explain the whole thing.

The SDS crank position sensing system uses 4 magnets in the crank pulley. Three of these magnets are "trigger" magnets. The fourth magnet is a "synchronization" magnet. It only needs three triggers magnets for the 6 cyl Alfa because it fires two spark plugs at a time.

There are two pickups mounted on the position sensor. The first senses the syncro magnet and the other senses the 3 trigger magnets.

Obviously the magnets in the crank pulley have to be positioned in certain places in relation ship to TDC and certain distances from each other. The SDS computer can compensate for errors in magnet position to an extent.

In regards to our sensor mount, we actually have a few versions.
1. Milano with A/C
2. Milano without A/C
3. GTV6 with a Milano A/C compressor
4. GTV6 without A/C

We are not going to bother with making a mount for a GTV6 with a GTV6 A/C compressor since those compressors suck.

I am so happy with this mount I am upgrading older versions I sold to this newer type entirely at my expense. The old one worked well but it required the sensor to be realigned after a belt change.

Greg Gordon,
www.hiperformancestore.com

Greg Gordon · Post by **Greg Gordon** » Wed Oct 17, 2007 6:18 am

I should add, this is all explained very clearly in the SDS instruction manual. It's also really easy to tune this system.

Barry · Post by **Barry** » Wed Oct 17, 2007 8:25 am

Greg,The sync trigger is more commonly known as a "home" trigger.

Greg Gordon · Post by **Greg Gordon** » Wed Oct 17, 2007 5:32 pm

Thanks Barry. Automotive terminology varies so much it gets confusion.

Crank position sensor mount