924Board.org

OR_Sunset · Joined: 04 Jan 2003 Posts: 312 Location: Veneta, OR

Is this the adjustable cam sprocket that will work on the 924?

www.seffects.com/catalog/product.asp?ProductCode=NEU621021&MainCategory=&Category=
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82 924 N/A -
9.3:1 CR Pistons, Dual Webers, Stage 2 Cam.
4-1 Headers, DynoMax exhaust, Monza tips.
MSD 6AL Ignition, 944racing short shift kit.
Through hood cold air intake with scoop, K&N.
Silver/Blue.

Lizard · Posted: Thu Dec 18, 2003 7:44 am Post subject:

this gear simply advances or retards the cam slightly so you can change the power curve of the car,
the Franco gear which a few people have actually retards the cam in the high end the advances in the low end, I may have that backwards though
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3 928s,

OR_Sunset · Joined: 04 Jan 2003 Posts: 312 Location: Veneta, OR

Yeah, but my impression is that the franco gear is next to impossible to get ahold of. I was just wondering if this gear can be used on the 924 (it says all VW 75-99)... I need to advance my cam timing by about 3 deg I think to get a little more low end out of my stage 2.
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82 924 N/A -
9.3:1 CR Pistons, Dual Webers, Stage 2 Cam.
4-1 Headers, DynoMax exhaust, Monza tips.
MSD 6AL Ignition, 944racing short shift kit.
Through hood cold air intake with scoop, K&N.
Silver/Blue.

Alex Roy · Posted: Thu Dec 18, 2003 8:33 am Post subject:

Yes, the 8 valve A1/A2/A3 cam gear works perfectly on the 924

OR_Sunset · Joined: 04 Jan 2003 Posts: 312 Location: Veneta, OR

Thanks Alex. From the searches I did here, it looks like variable cam timing for the 924 is a long dead enterprise. Interesting. I would have thought that with the current popularity of vario-cam setups in performace cars, there would be a demand for such things as retrofits. Maybe they are hard to make?
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82 924 N/A -
9.3:1 CR Pistons, Dual Webers, Stage 2 Cam.
4-1 Headers, DynoMax exhaust, Monza tips.
MSD 6AL Ignition, 944racing short shift kit.
Through hood cold air intake with scoop, K&N.
Silver/Blue.

AppleBit · Joined: 16 Nov 2002 Posts: 1516 Location: Minneapolis, MN

They are expensive to make and unless we get a big order, we won't see any more. We need an order of 25 to put it through.

It really shouldn't be that hard to find 25 people that want the performance gain this brings. I own two- one for my car, and I bought the last one for backup. No, I won't sell it- not even for $1000 because the performance gain is worth $1000! The auto-vario cam timing is the sweetest thing- low end torque like a mad V8 and high end RPM's like a 911.
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Classic British Sports Car Restoration v6 + v8 Engine Conversion Swaps

Porsche 924 Wide Body LS1 Corvette 500 Horsepower Engine

OR_Sunset · Joined: 04 Jan 2003 Posts: 312 Location: Veneta, OR

This is too sad. There are more than enough board members here who are trying to improve their cars' performance to meet a 25 unit order I would think. How much are we talking per unit? $250, $300? You can easily spend more than that on exhaust mods for what must be very little gain in comparison.

Anyone interested in starting a list? I would be willing to coordinate the transaction and work with the manufacturer (even though someone who has actually done business with the guy might be a better choice)... Can we spark some interest say in the next couple months, maybe?

Alternatively, could we get diagrams, blueprints, whatever, and maybe coordinate with more local machine shops?
_________________
82 924 N/A -
9.3:1 CR Pistons, Dual Webers, Stage 2 Cam.
4-1 Headers, DynoMax exhaust, Monza tips.
MSD 6AL Ignition, 944racing short shift kit.
Through hood cold air intake with scoop, K&N.
Silver/Blue.

Lizard · Posted: Fri Dec 19, 2003 4:21 am Post subject:

this is not the best time to do this as the christmas season drains so much money, last time I believe it was going to be $300
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3 928s,

Kenodog · Joined: 25 Jun 2003 Posts: 2667 Location: Vancouver,B.C.

If you could keep it under 300 i'd take one for sure.
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1979 Euro 931, Olive
1981 931, Sabine
1991 Ford Ranger XLT 4x4, Ricky
1996 Ford E-350 ex-FedEx Van
2014 Mazda CX-5 (Kinderwagon)
2019 KTM 790 Adventure
2024 KLX300
2024 KLX140

Mikri184 · Joined: 12 Sep 2003 Posts: 746 Location: Ferndale, WA

Seems this has come up before, who is it that we need to talk too, toss me the info and with my enterprizing ambition for the 924 maybe I could get the ball rolling, Of course this is in the best interest of helping those who have already done alot of work on this before me. Seems that at $200-$300 a pop it would be worth someones time?
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Life is to short to be looking for something?

Paul · Posted: Fri Dec 19, 2003 2:03 pm Post subject:

As it has been posted many times, our cars are not a good fit for the Franco gear since our distributor is driven by the camshaft unlike VWs that use an aux shaft.

CBass · Joined: 03 Nov 2002 Posts: 2807 Location: Vancouver, Canada

Maybe the guy would be willing to license the design for a limited run made by someone else...
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'81 931 in various states of assembly

OR_Sunset · Joined: 04 Jan 2003 Posts: 312 Location: Veneta, OR

No doubt we need some contact info... I will do some digging on the net.

Paul, that is a good point, that the variable cam timing also affects ignition timing on our cars. I tried advancing my timing belt one tooth some time ago, and found I could not get the ignition timing set properly. I was, however, able to fishtail away from the stop sign by my house with remarkable ease. The loss in power over 4000 rpms wasn't worth it though.

What is the net effect of varying ignition timing in proportion to cam timing assuming more advanced cam timing at low RPMs, gradually retarding as the engine gains speed? It seems to me that a couple degrees more static advance on the dist would solve the problem, as it would be taken out as the RPMs rise. Too much advance at high rpms robs power anyway. Am I getting this right, or are there other dynamics involved here?
_________________
82 924 N/A -
9.3:1 CR Pistons, Dual Webers, Stage 2 Cam.
4-1 Headers, DynoMax exhaust, Monza tips.
MSD 6AL Ignition, 944racing short shift kit.
Through hood cold air intake with scoop, K&N.
Silver/Blue.

Paul · Posted: Sat Dec 20, 2003 10:36 am Post subject:

Don't have to dig on the net, just search this board's past posts for "franco"

Applebit how's your Franco doing?

http://www.924board.org/viewtopic.php?t=1043&highlight=franco

AppleBit · Joined: 16 Nov 2002 Posts: 1516 Location: Minneapolis, MN

well, the engines been apart (the mechanic doing the valve clearance damaged the head) but once it comes back together in a few weeks that franco gear is going back on the car...

Would I ever run without it? Noh way! That thing is awesome. You notice the power difference- significantly more low end torque and more upper end power- makes the engine rev quick. Makes 4th gear rewarding when you click her into 80 and shift at 107 mph very quickly. Without it on, it takes a little longer to get up there. You can really notice it when you do an on-off comparision with the car in 4th gear and starting out at a 50 mph speed going to 100.
_________________
Classic British Sports Car Restoration v6 + v8 Engine Conversion Swaps

Porsche 924 Wide Body LS1 Corvette 500 Horsepower Engine