Slant *        6        Forum
Home Home Home
The Place to Go for Slant Six Info!
Click here to help support the Slant Six Forum!
It is currently Thu Mar 28, 2024 5:02 am

All times are UTC-07:00




Post new topic  Reply to topic  [ 51 posts ]  Go to page 1 2 3 4 Next
Author Message
PostPosted: Fri Apr 23, 2021 11:58 am 
Offline
EFI Slant 6

Joined: Thu Apr 18, 2019 7:57 am
Posts: 318
Location: Lawrenceville, GA
Car Model: 1966 Dodge Dart
I had been poking around to see if I could get a sensor in through the fuel pump port to read the fuel pump eccentric and serve as a cam position sensor. This was something that sounded workable but I figured I'd need to do a lot of work with a threaded sensor to adjust the sensor gap. But after a few measurements, I found that a Hall effect sensor we sell where I work happened to be just the right length.

Image

I just needed to drill and tap two holes in my fuel pump block off plate.

Image

View from inside the motor.

Image

I was able to confirm it triggers with a volt meter.

Image

_________________
Matt Cramer
1966 Dodge Dart turbo / EFI project


Top
   
PostPosted: Fri Apr 23, 2021 12:45 pm 
Offline
Supercharged
User avatar

Joined: Sat Nov 27, 2004 8:03 pm
Posts: 8977
Location: IRWIN PA
Car Model:
Good tips there Matt,

Thanks for sharing.

I will probably "borrow" / recycle that approach some day.

Greg

_________________
http://www.youtube.com/hyperpack
Image


Top
   
PostPosted: Fri Apr 23, 2021 6:58 pm 
Offline
Supercharged

Joined: Wed Sep 17, 2008 6:48 pm
Posts: 3805
Location: Indianapolis
Car Model:
Nice tip Matt, can you post a part number and source ( DIYAUTOTUNE?) for that sensor?

_________________
Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8


Top
   
PostPosted: Sat Apr 24, 2021 4:21 am 
Offline
Supercharged
User avatar

Joined: Sat Nov 27, 2004 8:03 pm
Posts: 8977
Location: IRWIN PA
Car Model:
DadTruck wrote:
Nice tip Matt, can you post a part number and source ( DIYAUTOTUNE?) for that sensor?



Most likley This one

Greg

_________________
http://www.youtube.com/hyperpack
Image


Top
   
PostPosted: Sat Apr 24, 2021 11:23 am 
Offline
Board Sponsor & Moderator
User avatar

Joined: Mon Oct 21, 2002 11:08 am
Posts: 16447
Location: Blacksburg, VA
Car Model:
Wow, super cool! I will likely use this on Project V as I wire up the MS3X soon.

Lou

_________________
Home of Slant6-powered fun machines


Top
   
PostPosted: Mon Apr 26, 2021 12:51 pm 
Offline
EFI Slant 6

Joined: Thu Apr 18, 2019 7:57 am
Posts: 318
Location: Lawrenceville, GA
Car Model: 1966 Dodge Dart
Correct, it's the sensor in Greg's link.

_________________
Matt Cramer
1966 Dodge Dart turbo / EFI project


Top
   
PostPosted: Mon Apr 26, 2021 1:48 pm 
Offline
Turbo EFI
User avatar

Joined: Mon Jan 12, 2015 5:55 am
Posts: 1387
Location: Brightwood, VA
Car Model: 1965 Plymouth Belvedere I
It would be interesting to see what the pulese looked like on a scope, especially whit the engine running.

_________________
-MattMan
LEANED & MEAN
Image


Top
   
PostPosted: Mon Apr 26, 2021 5:30 pm 
Offline
Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
Badvert65 wrote:
It would be interesting to see what the pulese looked like on a scope, especially whit the engine running.



Yep.....

Doesn't seem like it would have a distinct enough signal because of the gradual change in distance from the sensor.

_________________
Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

8)


Top
   
PostPosted: Tue Apr 27, 2021 6:43 am 
Offline
EFI Slant 6

Joined: Thu Apr 18, 2019 7:57 am
Posts: 318
Location: Lawrenceville, GA
Car Model: 1966 Dodge Dart
Badvert65 wrote:
It would be interesting to see what the pulese looked like on a scope, especially whit the engine running.


Since this is a Hall effect, the waveform will be a 0-12 volt pulse once per cam resolution - I was able to confirm it transitions properly in a low speed test, although it's possible you may get a few noise pulses at the edges. The real question will be how stable it is. The MS3 with a missing tooth crank trigger allows for a lot of tolerance on the edges - even if these change by 60 degrees or more, you can still get a stable enough reading in the center of the lobe.

Once I have the engine running, I plan to use the VVT mode (intended for cams with hydraulically adjustable advance) to see if I can get a read on how stable the trigger edges turn out to be.

_________________
Matt Cramer
1966 Dodge Dart turbo / EFI project


Top
   
PostPosted: Wed Apr 28, 2021 7:17 pm 
Offline
Supercharged
User avatar

Joined: Sat Nov 27, 2004 8:03 pm
Posts: 8977
Location: IRWIN PA
Car Model:
If one planned on using a cam for this explicit purpose a more finite edge could be ground into that pump lobe if needed correct?

Greg

_________________
http://www.youtube.com/hyperpack
Image


Top
   
PostPosted: Thu Apr 29, 2021 3:22 am 
Offline
Board Sponsor & Moderator
User avatar

Joined: Mon Oct 21, 2002 11:08 am
Posts: 16447
Location: Blacksburg, VA
Car Model:
Yeah, good idea. Could be done by hand with a die grinder or even bench grinder.

Lou

_________________
Home of Slant6-powered fun machines


Top
   
PostPosted: Thu Apr 29, 2021 7:23 am 
Offline
EFI Slant 6

Joined: Thu Apr 18, 2019 7:57 am
Posts: 318
Location: Lawrenceville, GA
Car Model: 1966 Dodge Dart
Greg Ondayko wrote:
If one planned on using a cam for this explicit purpose a more finite edge could be ground into that pump lobe if needed correct?

Greg


Yes, but this should work fine for anything short of putting a hydraulic VVT actuator on your cam sprocket or attempting to data log your timing chain stretch.

_________________
Matt Cramer
1966 Dodge Dart turbo / EFI project


Top
   
PostPosted: Thu Apr 29, 2021 7:30 am 
Offline
Supercharged
User avatar

Joined: Sat Nov 27, 2004 8:03 pm
Posts: 8977
Location: IRWIN PA
Car Model:
Dart270 wrote:
Yeah, good idea. Could be done by hand with a die grinder or even bench grinder.

Lou



Yep, Fo' SHo'


Greg

_________________
http://www.youtube.com/hyperpack
Image


Top
   
PostPosted: Thu Apr 29, 2021 7:31 am 
Offline
Supercharged
User avatar

Joined: Sat Nov 27, 2004 8:03 pm
Posts: 8977
Location: IRWIN PA
Car Model:
MadScientistMatt wrote:
Greg Ondayko wrote:
If one planned on using a cam for this explicit purpose a more finite edge could be ground into that pump lobe if needed correct?

Greg


Yes, but this should work fine for anything short of putting a hydraulic VVT actuator on your cam sprocket or attempting to data log your timing chain stretch.



Sounds good Matt,

Good luck with the initial drop in and fire up!

Greg

_________________
http://www.youtube.com/hyperpack
Image


Top
   
PostPosted: Thu Apr 29, 2021 4:09 pm 
Offline
Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
I may be wrong, but don't most ECU ignore the cam position sensor once they've already figured it once during start.......

So if the signal is good enough during starting for the ECU to figure out where the engine is in it's cycle, you're good to go.

_________________
Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

8)


Top
   
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 51 posts ]  Go to page 1 2 3 4 Next

All times are UTC-07:00


Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited