crank position sensor on harmonic ballancer?

[p8ntman442]

hey all, im looking for some very specific information.

I recently worked on a 95 or 96 skylark doing the timing chain housing gasket. I saw the crank position sensor located on the harmonic ballancer. I hear its a secondary to a 7x sensor in the block. Can this be confirmed. Also, the 3 wire plug that comes out of it, where does this connect to coil packs or ecm?

Im looking into making an external crank trigger to allow me to run dohc's on my 2.8 block. It will also be helpful to run a forged crank in a older block with no boss for a crank position sensor.

Thanks.

check out this thread for more details.

http://realfierotech.com/phpBB/viewtopic.php?t=1825

[v6h.o.]

Re: crank position sensor on harmonic ballancer?

hey all, im looking for some very specific information.

I recently worked on a 95 or 96 skylark doing the timing chain housing gasket. I saw the crank position sensor located on the harmonic ballancer. I hear its a secondary to a 7x sensor in the block. Can this be confirmed. Also, the 3 wire plug that comes out of it, where does this connect to coil packs or ecm?

The front crank sensor behind the balancer is a 24X trigger sensor, its used by the PCM along with the Cam Position sensor to run the Sequential Fuel injection. The wiring from the 24x goes straight to the PCM.

Im looking into making an external crank trigger to allow me to run dohc's on my 2.8 block. It will also be helpful to run a forged crank in a older block with no boss for a crank position sensor.

Explain how are you going to run DOHC's on a 2.8L block??? you do realize that the DOHC block is a differently cast block and that you can only run those heads on those blocks only.

[p8ntman442]

Re: crank position sensor on harmonic ballancer?

Explain how are you going to run DOHC's on a 2.8L block??? you do realize that the DOHC block is a differently cast block and that you can only run those heads on those blocks only.

its not your average 2.8

http://realfierotech.com/phpBB/viewtopic.php?t=590

Thanks for the quick reply and good info.

[Guest]

Re: crank position sensor on harmonic ballancer?

Explain how are you going to run DOHC's on a 2.8L block??? you do realize that the DOHC block is a differently cast block and that you can only run those heads on those blocks only.

its not your average 2.8

http://realfierotech.com/phpBB/viewtopic.php?t=590

Thanks for the quick reply and good info.

Can you repost it here, that link comes to a log-in page.

[bszopi]

RE: Re: crank position sensor on harmonic ballancer?

You probably have to be a member to see it...

[SappySE107]

RE: Re: crank position sensor on harmonic ballancer?

Yeah, and if its about his DOHC attempt...ive already been through it. He gets pissed if you tell him anything he doesn't wanna hear.

[v6h.o.]

Re: crank position sensor on harmonic ballancer?

its not your average 2.8

Riiiiiighhhhht... Well then that explains it all.

[p8ntman442]

sorry didnt realize it would come to a log in page. Its a 9 page thread, so ill post pics to the motor here.

basics:

prototype aluminum block 38 lbs empty

open deck (allows for custom coolant passages to cool dohc heads)

removable lifter bores fed from a oil tube coming up from the cam shaft oiling journals. (allows for oil feed to dohc Heads)

Aluminum sleeves (will be replaced with steel sleeves to accomodate the 3.4l heads and for durability. Deck will be installed with these.

aluminum GEN 1 HEADS with SMALL VALVES. If I cant make the dohc heads fit it will use these heads and get boosted.

pics here http://pg.photos.yahoo.com/ph/p8ntma...=/fd0c&.src=ph

[SHOoff]

prototype aluminum block 38 lbs empty

Strangely enough. If I made a prototype aluminum block and had the intention of making it DOHC.... i'd probably go right ahead and eliminate the whole camshaft in the block idea. Doesnt seem like it would be very useful on DOHC

[geoffinbc]

you need the cam bearings for the shaft to drive the oil pump.

[Guest]

you need the cam bearings for the shaft to drive the oil pump.

Dry sump.

[p8ntman442]

prototype aluminum block 38 lbs empty

Strangely enough. If I made a prototype aluminum block and had the intention of making it DOHC.... i'd probably go right ahead and eliminate the whole camshaft in the block idea. Doesnt seem like it would be very useful on DOHC

I didnt make it. I have thought of going dry sump, but that is $$$$$$$$$$$ I dont need to spend. Does anyone know if the dohc blank to drive the oil pump will work in the pushrod blocks? I doubt anyone has ever checked this.

The cam bearings are held in by the block and the lifter bore casting, so to remove the casting, I will have to cnc some caps to hold the bearings in place.

[SappySE107]

Survey says! same. I have a 3100 cam and a 3.4 DOHC dummy cam right here and they measure the same. Didn't think GM would change that.