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Thermal Reactors
Hey guys! This may be a dumb question.. on my 76 911S targa, I have the motor pulled and am replacing all the seals and heat exchangers, my question is, my motor does not have Thermal reactors. Is this a good thing? (I've heard the dreaded stories!) It is a 2.7 with the 5 blade fan. The timing chain and rails and tensionors have all been replaced. Is it a plus that my motor did not come with the thermal reactors? I thought all the mid years came with them?
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06-23-2017, 11:41 AM
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French Import
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Thermal reactors = Bad!
5 blade fan = Bad! These were stop gap measures to satisfy the ridiculous emission requirements at the time. Engines had to run hotter to pass the tests. See if you can find a 11 blade fan to keep your engine cooler: forget about thermal reactors altogether.
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Gilles & Kathy Happiness is not having a Porsche in the garage... Happiness is having a Porsche on the road!  86 Porsche 911 Cabriolet, 2011 BMW 1200RT, 03 Saab 93 Cabriolet, 06 MB E350 Estate |
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06-23-2017, 11:51 AM
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Registered Minimalist
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It's a very good thing.
Why don't you swap in a 11 blade fan? It will help move more air across your engine and keep it cooler. 
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Duane / IG: @duanewik / Youtube Channel: Wik's Garage Check out my 75 and 77 911S build threads |
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06-23-2017, 11:53 AM
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French Import
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Quote:
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Gilles & Kathy Happiness is not having a Porsche in the garage... Happiness is having a Porsche on the road! 86 Porsche 911 Cabriolet, 2011 BMW 1200RT, 03 Saab 93 Cabriolet, 06 MB E350 Estate |
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06-23-2017, 11:55 AM
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I am definitely going to get an 11 blade fan. I was just surprised and happy I did not have the thermal reactors!!
 
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06-23-2017, 12:15 PM
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Registered Minimalist
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That was before I really cleaned it!
 You can also choose to delete the air pump, air injectors and spider line. It's way easier to do it now. Are you running the smog pump up top?
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Duane / IG: @duanewik / Youtube Channel: Wik's Garage Check out my 75 and 77 911S build threads |
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06-23-2017, 01:03 PM
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Registered
Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,499
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The air injectors plug bolts are 10mm x 1.0mm thread
Bruce |
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06-23-2017, 01:07 PM
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76 911S Targa
Join Date: Oct 2010
Location: Idaho
Posts: 1,150
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You might consider removing the air lines for the smog pump as well. They were designed to inject extra air to feed combustion within the thermal reactors. Without the thermal reactors, the air lines do not do much except dilute the exhaust gases. If they are not required where you live, removal will make access to the engine easier. I cannot see if you still have the smog pump, the absence of which makes valve adjustment far easier.
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76 911S, 2.7, Bursch Thermal Reactor Replacements, Smog Pump Removed, Magnecors, Silicone Valve Cover Gaskets, 11 Blade Fan, Carrera Oil Cooler, Turbo Tie Rods. |
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06-23-2017, 01:09 PM
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Quote:
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06-23-2017, 01:20 PM
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Car with no name
1975 Porsche 911s
