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tips, technology, tools and techniques related to vehicle driveline components

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BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5812 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Sensing cam position on Buick/Rover V8
Posted by: BlownMGB-V8
Date: October 09, 2013 10:11AM

Not sure how Curtis dealt with that issue, on mine I kept the stock bushings and oiling method.

Jim


NCtim
Tim Shumbera
Western North Carolina
(238 posts)

Registered:
01/19/2012 04:35PM

Main British Car:


Re: Sensing cam position on Buick/Rover V8
Posted by: NCtim
Date: October 15, 2013 05:29PM

Hey Fred,

I was thinking of exploring Larry's idea to shorten the engine by a few inches. Just bouncing ideas around. I wouldn't have to modify the cam because there's not the extra length for the distributor drive gear. How much room would it save? I won't know until I can get to the junk yard and measure. I have to wait until the copperheads and rattlesnakes are down for the winter. I don't do junk yards in nice weather around here. Killed a rattlesnake two weeks ago. Hate those things, yeeesh!

Tim


DiDueColpi
Fred Key
West coast - Canada
(1259 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Sensing cam position on Buick/Rover V8
Posted by: DiDueColpi
Date: October 15, 2013 07:53PM

Hey Tim,
I've got a CUX engine and a GEMS engine sitting here side by side (and no rattlers)
Measured from the water pump pulley flange, the Gems engine is 2.5" shorter.
I don't know about the 3800 covers but I would suspect that they are even shorter to clear a FWD installation.
Sounds like Larry is the guy to talk to about that.
Cheers
Fred


mgb260
Jim Nichols
Sequim,WA
(1994 posts)

Registered:
02/29/2008 08:29PM

Main British Car:
1973 MGB roadster 260 Ford V8

Re: Sensing cam position on Buick/Rover V8
Posted by: mgb260
Date: October 16, 2013 12:05AM

I've never tried the 3800 cover but, you better get all the accessory brackets and use that water pump also as it is serpentine belt. There was a thread here where they used the bottom half 3800 cover and used the gearotor oil pump by modifying the damper and welded to the top stock half for distributor and water pump. Or the uncommon Rover late 3.9/4.2 transitional cover which has gearotor oil pump and distributor hole. I think there is a rare 87-88 Buick V6 cover also but it maybe serpentine drive also, so again you would need all accessory brackets.



Edited 1 time(s). Last edit at 10/16/2013 12:06AM by mgb260.


Eccentric British Guy
David Blades
England
(4 posts)

Registered:
01/21/2014 04:31PM

Main British Car:
Mostly Rover v8 (on the outside)

Re: Sensing cam position on Buick/Rover V8
Posted by: Eccentric British Guy
Date: July 24, 2014 06:55PM

Sorry for resurrecting an old thread, but this thread provided a good insight into cam sensors. I have now completed an installation on my TVR (rover) V8 so thought it worth the time to provide an update.

The concept: A wheel designed to sit in front of the JP duplex timing sprocket on the cam. It's balanced by design. The pin is designed to give a clean signal with the readily available 1gt101dc Hall sensor from Honeywell, fitted in the standard cam sensor location in an intermediate Serpentine timing cover.

CAD drawing of the wheel
cam_trigger.jpg

Water jet cut cam sensor wheel on engine
20140417_180030.jpg

The engine is now complete and I'm pleased to say the cam wheel and sensor performed flawlessly from the beginning, and the installation is nice and tidy, even if I did have to hack a corner off the inside of the timing cover. (It's not there on the later timing covers)


DiDueColpi
Fred Key
West coast - Canada
(1259 posts)

Registered:
05/14/2010 03:06AM

Main British Car:
What if the Hokey Pokey really is what it's all about?

authors avatar
Re: Sensing cam position on Buick/Rover V8
Posted by: DiDueColpi
Date: July 24, 2014 10:34PM

Looks fantastic David.
And it's doing the job as intended, can't do much better than that.
Cheers
Fred


parrisw
William Parris

(16 posts)

Registered:
11/18/2014 10:15AM

Main British Car:


Re: Sensing cam position on Buick/Rover V8
Posted by: parrisw
Date: November 18, 2014 09:39PM

I need to do the same thing here. Any of these for sale yet? Or do I need to make one. I was just planning on using the crane optical pickup in the distributor as a cam sensor, just fill in all but one slit on the chopper wheel.



parrisw
William Parris

(16 posts)

Registered:
11/18/2014 10:15AM

Main British Car:


Re: Sensing cam position on Buick/Rover V8
Posted by: parrisw
Date: November 19, 2014 12:28AM

Another question. How are you setting the Sync on the cam sensor? Like how to index it. Ford uses a tool that goes in place of the sensor when you install it, it indexes it in the correct position.


parrisw
William Parris

(16 posts)

Registered:
11/18/2014 10:15AM

Main British Car:


Re: Sensing cam position on Buick/Rover V8
Posted by: parrisw
Date: November 22, 2014 11:08AM

Anyone? Anyone? So I got a synchronizer out of a Ford 4.2L V6, it's the 3 wire sensor. Now just need an old distributor to cut apart.


Moderator
Curtis Jacobson
Portland Oregon
(4411 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: Sensing cam position on Buick/Rover V8
Posted by: Moderator
Date: November 22, 2014 12:15PM

Well... with a half moon set-up (180 degrees "on" and 180 degrees "off",) you don't have to be very precise. I just eyeballed it. I'm probably within 45 degrees or so!


parrisw
William Parris

(16 posts)

Registered:
11/18/2014 10:15AM

Main British Car:


Re: Sensing cam position on Buick/Rover V8
Posted by: parrisw
Date: November 26, 2014 12:48AM

Wow!! LOL. That's not very close!! Ever think of using a Lab Scope? Dual channel, then line up the waveforms? So at #1 TDC, you'd want the half moon vane just at the edge of the sensor?



Edited 1 time(s). Last edit at 11/26/2014 12:51AM by parrisw.


Moderator
Curtis Jacobson
Portland Oregon
(4411 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: Sensing cam position on Buick/Rover V8
Posted by: Moderator
Date: November 27, 2014 11:42PM

As I understand/recall, MegaSquirt polls my Hall effect (3-wire) cam sensor just once while I'm cranking the engine and immediately after sensing the missing-tooth gap in my 36-1 crank position trigger wheel. It only needs to know whether I'm on the compression stroke or the exhaust stroke. Just after top-dead-center it's got to be one or the other, right? The half moon wheel gives me a whole lot of leeway.

http://www.britishv8.org/MG/CurtisJacobson/HallEffectSensor.jpg
(The sensor on the left is a Hall effect sensor. The sensor on the right is a two-wire VR sensor... and that's the kind you don't want to use in combination with a half moon wheel.)


parrisw
William Parris

(16 posts)

Registered:
11/18/2014 10:15AM

Main British Car:


Re: Sensing cam position on Buick/Rover V8
Posted by: parrisw
Date: December 07, 2014 10:38PM

I've got the Hall effect one with three wires.

I've got my sensor all done. Was pretty easy actually.

Pics to come.


parrisw
William Parris

(16 posts)

Registered:
11/18/2014 10:15AM

Main British Car:


Re: Sensing cam position on Buick/Rover V8
Posted by: parrisw
Date: December 07, 2014 10:57PM

Post on my site about building a sensor.

[www.tr-8.ca]



Edited 1 time(s). Last edit at 12/08/2014 12:29AM by parrisw.


donkelly23
Don Kelly
Charleston, SC
(111 posts)

Registered:
07/21/2011 05:13PM

Main British Car:
1980 TR7 V8 Z28 FI ECM 4.0

Re: Sensing cam position on Buick/Rover V8
Posted by: donkelly23
Date: August 02, 2016 05:08PM

Thank you for all the info.I am going to try the GN cam sensor I was able to buy on a close out sale for about $75
20141215_173214 (Medium).jpg



Edited 1 time(s). Last edit at 08/02/2016 05:09PM by donkelly23.



Moderator
Curtis Jacobson
Portland Oregon
(4411 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: Sensing cam position on Buick/Rover V8
Posted by: Moderator
Date: August 03, 2016 06:07AM

Sweet!


donkelly23
Don Kelly
Charleston, SC
(111 posts)

Registered:
07/21/2011 05:13PM

Main British Car:
1980 TR7 V8 Z28 FI ECM 4.0

Re: Sensing cam position on Buick/Rover V8
Posted by: donkelly23
Date: August 03, 2016 09:53AM

Curtis, I am in awe of what you, Mr Nichols and Mr Blackwood do.
I am getting help with this from Will Parris and others on the TWOA site for my Wedge.
Most NW people I noticed. Should have done this before I left Seattle for the Beaches of Charleston



Edited 1 time(s). Last edit at 08/03/2016 11:27AM by donkelly23.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5812 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Sensing cam position on Buick/Rover V8
Posted by: BlownMGB-V8
Date: August 03, 2016 11:14AM

Don, that's a nice find on the GN cam sensor. Mind telling where you got it?

Jim


donkelly23
Don Kelly
Charleston, SC
(111 posts)

Registered:
07/21/2011 05:13PM

Main British Car:
1980 TR7 V8 Z28 FI ECM 4.0

Re: Sensing cam position on Buick/Rover V8
Posted by: donkelly23
Date: August 03, 2016 11:26AM

Jim, I bought it a least 2 years ago from Rockauto on a closeout.
Just looked at the pic. Took it 12/15/2014
Somebody mentioned it somewhere and I knew in the back of my mind I would MS the car eventually.
It's been sitting in my office closet since then


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5812 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Sensing cam position on Buick/Rover V8
Posted by: BlownMGB-V8
Date: August 03, 2016 04:59PM

Got a part number for it anywhere by chance?

Jim
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