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Registered
Join Date: Dec 2011
Posts: 59
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2.4 cold start nozzles
We have a 1972 911T 2.4 and we are in need of a set of cold start enrichment nozzles . The ones that are on the car have been crushed by someone with a serious need to tighten wormdrive hose clamps .
We would even take a set of trumpets/stacks to get a good set of nozzles . There are 4 nozzles with a "t" fitting and 2 with an elbow fitting. CAN ANYONE HELP ? Thanks Brian wrenchhead944@hotmail.com |
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12-14-2011, 09:31 AM
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Registered
Join Date: Oct 2006
Posts: 315
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Like you ,I tried a few yrs ago to locate some of these nozzles. I posted a thread on the early911Sregistry.org site. I only run with 4 out of the six and it still starts ok. These my be only required for real cold starts, which in Fla. never really occurs.
Most people sell stacks with those nozzles attached. Try to repair the ends, keeping the injector ends. If you look, they are really windshield washer plastic fittings with a brass pee hole for gas to drip. The thermostat keeps the main rack pretty rich for start up. A friend of mine had a 73E when I lived up North and his car started up fine without any nozzles(cold start solenoid completely eliminated) |
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12-15-2011, 04:05 AM
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Max Sluiter
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I have headers so my thermostat is eliminated and set to warm-running position permanently. Consequently, even in Southern California I need the cold start squirt of fuel to get the car started. Even then it takes three starts before it will continue running on the third. (A consistent three starts every weeekend I drive it). I tried it once without them and it would not start until I reconnected them.
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
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12-15-2011, 11:20 AM
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Registered
Join Date: Oct 2006
Posts: 315
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My friends 911E which I pointed out did take a few more cranks to get his car started when cold(sitting overnight)
I was not thinking clearly when I refered to the thermostst for start up. What I wanted to say is that the main rack, which most of us set more rich than the Factory setting, aids in start up. The thermostst only helps in cold running, not starting. If you can't fix you current nozzles you may want to try to make some out of windshield washer fittings. You have to taper the ends or make some sort of nozle on the ends for gas to pee out of. I think if you just let it pour in it will be too rich and probably would not distribute equally to all 6 stacks. |
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12-16-2011, 03:21 AM
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Max Sluiter
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The thermostat has stacks of discs that expand with temperature and change the position of a rod attached to the main rack. If you simply remove the heat exchanger hose then the thermostat will not warm up enough and so the rod will stay in its retracted cold position and make the main rack rich even when the engine is warm. The cold start is controlled by a different, electronic sensor which sends a signal to the solenoid on the fuel filter console to squirt fuel through the lines into the squirters in the stacks.
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
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12-16-2011, 11:00 AM
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Friend of Warren
Join Date: Oct 2000
Location: Lincoln, NE
Posts: 16,502
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They are unobtanium. You either find someone selling used ones, or like the poster stated above, make your own.
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Kurt V No more Porsches, but a revolving number of motorcycles. |
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12-16-2011, 11:21 AM
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Registered
Join Date: Dec 2011
Posts: 59
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Hi here are some pix of the nozzles that we have to work with.
As you can see they are all different lengths . Brian 
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12-19-2011, 04:47 AM
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1971 Porsche 911S
