924Board.org

[ideola]

PRICE: $38 + shipping. 14 available for immediate purchase.

Now plated with yellow cad (see updated pix below).

• Water-cut from mild steel
  
• .125" thickness
  
• 4.5" diameter
  
• Sandwich style installation between V-belt crank pulley and Gilmer pulley provides simple bolt-on installation with no welding, balancing, or concern about rotational alignment; i.e. once the V-belt pulley is torqued to the Gilmer pulley, the trigger wheel will be perfectly centered.
  
• Balance hole opposite the missing tooth
  
• Fully indexable to six different positions to allow each installer to determine the optimum placement for the pickup sensor

Now for some pix.


The following six photos depict the orientation of the oil pump with the Gilmer position at TDC. The sequence of shots shows how the trigger wheel can be installed in one of six positions to accommodate a variety of options for mounting the pickup sensor.







The following two photos depict how the trigger wheel is sandwiched between the V-belt crank pulley and the Gilmer pulley:



The following two photos depict the minimum clearance between the trigger wheel and the oil pump housing. In actuality, there will be more clearance than depicted because the Gilmer pulley does not press against the front oil seal (in these photos, the Gilmer pulley is bascially just sitting atop the seal); on an installed crankshaft, there is a mm or two of clearance between the Gilmer pulley and the seal, so there will be plenty of clearance between the trigger wheel and the oil pump housing when installed on a completed rotating assembly.


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erstwhile owner of just about every 924 variant ever made

[ideola]

I forgot to mention, this approach will requires spacing out the pulleys for the water pump, alternator and A/C compressor to keep the V-belt grooves aligned. Here is how you do that:

For the water pump on both the 924 & 931:
Get three to six M8 washers. Get three M8x20 bolts (stock bolts are M8x16). Use the washers to space out the pulley by .125"; the holes in the water pump to which the pulley mounts are thru-holes so there should be no issue if there is a little extra length on the bolts. (I am investigating having a .125" thick version of the stock water pump spacer made up to stack with the OEM spacer, but I don't think it will be cost effective. Washers are cheap!).

For the A/C compressor on both the 924 & 931:
Get three to six M10 washers. Insert them BEHIND the large bracket. The stock bolts are M10x70 (qty 1) and M10x55 (qty 2). 1/8" of an inch should not make a big deal as these bolts are plenty long and have sufficient thread engagement; just make sure to properly torque them. If you're really concerned about it, get M10x75 and M10x60 bolts...but I'm not sure if they will bottom out in the blind holes in the block. You might need to space them a little further by putting washers on the front side, or grinding them down a tad. I am also contemplating having a single-piece spacer made for this application, but again, washers are cheap!

For the alternator on the 931:
Don't need to do anything further as the alt bracket sits atop the A/C bracket and will be carried forward by the above arrangement.

For the alternator on the 924:
Get three to six M8 washers. Space out the front triangular bracket that attaches to the water pump housing by placing washers BEHIND the bracket. Then use the additional washers to insert behind the upper mounting ear of the alternator, just in front of the rear bracket. It's possible that the rear bracket can be slid forward because it has elongated holes, but this will depend a lot on the condition of your bushings, so the best bet is to plan to space it out with washer as described. The long bolt for the upper alternator ear is M8x95, you may wish to get one that is M8x100. The two bolts for the water pump are M8x65 and M8x72. Use an M8x70 for the upper bolt, and an M8x75 for the lower bolt. (Note: I have not yet tested this out on the NA, so I don't know if the M8x70 bolt will bottom out in the blind hole in the block...it's possible you may have to grind it down a tiny bit).
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erstwhile owner of just about every 924 variant ever made

[tyfighter123]

Looks great! Add one to my cart.
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Porsche 924 1977 N/A
Mustang GT/CS 2007
Porsche 924S 1987 (parts car)(cut up and recycled)
Porsche 911S 1976
Porsche 931 1980
Porsche 931 1980 (parts car)

[Horizonblue]

Excellent!
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Euro 924, 1976

"If you can't fix it, don't break it"

/P.G. Andersen

[flosho]

That looks like a pretty sweet setup.


Any plans to build a sensor mount to go with it?
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[This Space For Rent]

[ideola]

[!tom]

Looks great. One possible change would be to offset the teeth from the mounting holes on the wheel in order to double the number of possible mounting configurations.
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78 924 NA
5-lug

[ideola]

Finally got these plated (yellow cad):


Also now added to the storefront. $38 + shipping for the trigger wheel.

I now have the water pump pulley spacers available as well. These will be plated in yellow cad, and added to the website shortly. $17 + shipping for the water pump pulley spacer. These are made of the same material, in the same thickness, and using the same process as the trigger wheels.



In addition, I now also have a solution for blocking off the OEM distributor housing, which can double as a mounting point for a standard EDIS coil pack. Machined from billet aluminum, and includes a sealing o-ring. $97.50 + shipping. These are made-to-order, so please allow 2-3 weeks lead time.





Next up: VR sensor mounting bracket, the rest of the miscellaneous spacers listed above, and most importantly, reviving the pursuit of a supplier for the fuel rail.
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erstwhile owner of just about every 924 variant ever made

[Fifty50Plus]

Now that is just sweet!!!! Wish it were legal for SCCA
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1979 924 NA race car
1982 924 NA race car - Sold
1982 924 Turbo almost a PoS
1981 924 Turbo a real PoS, new engine
1982 924 Turbo nice body, blown engine
1972 911 E race car - going to Vintage
Various 944s to become IT-S race car

[Grenadiers]

If there is a possibility of machining the fuel rail to accommodate the head 'breather', I'm in!
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'83 944 Track car.
'88 924S Track car.
'89 944 Turbo
2004 Winnebago Vectra monster RV
2012 Jeep Wrangler
2014 Kia Soul
2001 Ford F350 powerstroke

[ideola]

[WEASEL149]

The distributor block-off with coil-pack mount is a nice neat solution for anyone not into DIY'ing - nice one
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1979 UK 932

[WEASEL149]

[Grenadiers]

Yeah, I'm going to remove the block-off plate, and find a brass elbow or something to fit into the hole. Only thing, I don't like have a nut on the inside of the head to hold it in place. Details to follow~!
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'83 944 Track car.
'88 924S Track car.
'89 944 Turbo
2004 Winnebago Vectra monster RV
2012 Jeep Wrangler
2014 Kia Soul
2001 Ford F350 powerstroke

[flosho]

That dist plug with mount, does it work with a standard edis coil.
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[This Space For Rent]