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Open Track Racing
Cooling for Open Track and sustained high speeds...
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<blockquote data-quote="camp upshur" data-source="post: 9073915" data-attributes="member: 50401"><p>I agree with the Evans NPG and run it. It will prevent localized boiling, but a stock shortblock still has the tight piston-to-wall clearance which will always be a nag.</p><p></p><p>If you do run an Evans system you will not want to run a 'modified' stock style thermostat. Evans systems thankfully run Behr inline thermostats with a much smoother and sensical coolant routing and an external oil cooler. I would most strongly recommend as large of an external oil cooler as possible for extended high speed running. When you run boost the oil gets the heat.</p><p></p><p>One of your unfortunate problems will be that in Germany the fuel is so so much better (they use a Research Octane Number fuel..Super 100 RON equates to as USA RON/MON octane of about 95~96 I think). But to get the horsepower without detonation benefit of this gas you would have to advance and/or boost and then have to augment the cooling system to remove this heat. Something the drag racers or burst speed guys aren't as concerned with as an Autobahn cruiser. This fuel offers an EASY free 75-100-?? horsepower generation to any Cobra application, thereagain if you can manage the heat this combustion. Sure beats California 91 octane.</p><p></p><p>The thought of a clearanced shortblock and 95~96 octane pump gas and adequate cooling would allow you to run 17# or more sustained boost...the dream of every Cobra owner. That would be an Autobahn cruiser!</p><p></p><p>Jimmy it is very neat to read your posts again. A word of unsolicited advice: when you do switch to NPG, be certain to remove the block plug located behind the R/H motor mount. Yes it is a supreme pain in the butt and very easy to rationalize not doing, however, even after otherwise fully draining my engine I was very surprised to have QUARTS of coolant still in the lower R/H water jacket which was otherwise unknown and unrecoverable. It was enough to have nullified (through dilution) the NPG and all of its benefits.</p><p></p><p>So far as adding water to NPG, of course you can top it off with water and continue to run. Forever if one would like. It is just that the resultant NPG/water mix will not have the nucleate efficacy of NPG. It would just be coolant.</p><p></p><p>[ame="http://en.wikipedia.org/wiki/Nucleate_boiling"]Nucleate boiling - Wikipedia, the free encyclopedia[/ame]</p><p></p><p></p><p>Camp Upshur</p></blockquote><p></p>
[QUOTE="camp upshur, post: 9073915, member: 50401"] I agree with the Evans NPG and run it. It will prevent localized boiling, but a stock shortblock still has the tight piston-to-wall clearance which will always be a nag. If you do run an Evans system you will not want to run a 'modified' stock style thermostat. Evans systems thankfully run Behr inline thermostats with a much smoother and sensical coolant routing and an external oil cooler. I would most strongly recommend as large of an external oil cooler as possible for extended high speed running. When you run boost the oil gets the heat. One of your unfortunate problems will be that in Germany the fuel is so so much better (they use a Research Octane Number fuel..Super 100 RON equates to as USA RON/MON octane of about 95~96 I think). But to get the horsepower without detonation benefit of this gas you would have to advance and/or boost and then have to augment the cooling system to remove this heat. Something the drag racers or burst speed guys aren't as concerned with as an Autobahn cruiser. This fuel offers an EASY free 75-100-?? horsepower generation to any Cobra application, thereagain if you can manage the heat this combustion. Sure beats California 91 octane. The thought of a clearanced shortblock and 95~96 octane pump gas and adequate cooling would allow you to run 17# or more sustained boost...the dream of every Cobra owner. That would be an Autobahn cruiser! Jimmy it is very neat to read your posts again. A word of unsolicited advice: when you do switch to NPG, be certain to remove the block plug located behind the R/H motor mount. Yes it is a supreme pain in the butt and very easy to rationalize not doing, however, even after otherwise fully draining my engine I was very surprised to have QUARTS of coolant still in the lower R/H water jacket which was otherwise unknown and unrecoverable. It was enough to have nullified (through dilution) the NPG and all of its benefits. So far as adding water to NPG, of course you can top it off with water and continue to run. Forever if one would like. It is just that the resultant NPG/water mix will not have the nucleate efficacy of NPG. It would just be coolant. [ame="http://en.wikipedia.org/wiki/Nucleate_boiling"]Nucleate boiling - Wikipedia, the free encyclopedia[/ame] Camp Upshur [/QUOTE]
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