924Board.org

[ideola]

I am working with IMI to adapt one of their existing gear reduction starters for the 931. I have sent a sample to them and expect to have a solution within the next 5-10 days. Early pricing indications are somewhere in the $215-$260 range for a single unit, not sure yet on volume discount. These prices compare favorably to rebuilt Bosch units.

If anyone else is interested, let me know, and I'll see what we can do re: a group buy. Otherwise, I'll post the particulars once I have everything sorted out. FWIW, these starters should also work for the 924S and the early 944 (and probably the later versions too, although I don't have a way to conclusively verify it).
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erstwhile owner of just about every 924 variant ever made

[Martijnus]

What exactly is a gear reduction starter?
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"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment

[!tom]

Exactly how it sounds.

There's normally a small electric motor that is connected to a planetary gearset, which reduces the speed and increases the torque of the shaft of the motor.

This is the in-vogue way to do starters nowadays, since it results in the the ability to use a much smaller motor than would otherwise be necessary. For example, you can use a motor with permanent field magnets rather than a coil field magnet due to the smaller torque requirements, resulting in a smaller, lighter package.
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78 924 NA
5-lug

[Rocco R16V]

Ideola you da man!
you must be a very powerful and infuential person to get these manufacturers to build new products for our very small part of the automotive aftermarket.
a great big thanks for you efforts!
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"Government exists to protect us from each other. Where government has gone beyond its limits is in deciding to protect us from ourselves. "
Ronald Reagan

[ideola]

[Grenadiers]

THis is what Dan is talking about:

The motor to the right is from a 931.
Here I took it apart to show you the gear reduction unit:

The head piece is flipped around, oops!
This is a shot of the machined flange to fit the motor to a 924 n/a, the six holes are for indexing.

I bought this from Applebit a couple of years ago. He may chime in on it's origin.
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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

[AppleBit]

*CHIME*



These are amazing! I bought it from (and was developed from) http://www.britishstarters.com/

They can make more - although I would verify everything first - but these reduce weight and last forever as well as crank over the engine much faster.

Notice the price he is asking - I am sure you can get them for that price

end of chime
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Classic British Sports Car Restoration v6 + v8 Engine Conversion Swaps

Porsche 924 Wide Body LS1 Corvette 500 Horsepower Engine

[D Hook]

I'd be up for anything that takes the drain off the battery when hard-starting happens. (as it does to us all.)
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'80 924 n/a SOLD

[ideola]

FWIW, I contacted britishstarters.com last week and have yet to get a reply. Being the impatient guy I am, I began looking at alternatives and came across IMI. They have been very responsive and helpful so far, and based on the questions they asked about dimensions and particular details of our starter, seem to have pretty good knowledge re: the various permutations...

Anyway, once my starter gets out to Cali, I hope to have pricing in short order.
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erstwhile owner of just about every 924 variant ever made

[AppleBit]

[Paul]

Just make sure it turns the correct direction when they are done...
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

[AppleBit]

[pocketscience]

I see different part numbers for NA and 931 (and auto trans), but is that simply the rating, or are they physically different? Bottom line Dan, is what you looking at going to be applicable to a NA?


G.
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Whoever said you can't buy happiness forgot about Porsche!
81 924 N/A, GTS lights, Saratoga, interior, headers, Integral cam, EFI (sold)
95 993
69 911

[AppleBit]

[Paul]

NA starters rotate in the opposite direction of 931, 944, and 968 starters.
_________________
White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.