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running cooler.


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Okay, its another hot :flamedevi humid summer here and since im doing a higher compression NA build i need to run my z31 a bit cooler, ive tried a brand new turbo model radiator, along with a electric fan install AND tried running 80% water and Redlines WatterWetter(which i do NOT recommend, it didnt drop the temps AT ALL, will complain to them asap)

 

what else could i do? i know i could run a cooler thermo but ive heard it can cause temp fluctuations and damage internals, is that true? im just trying to get it below the halfway mark on the temp gauge so i can run a hotter ignition to go with my cam/headwork and not worry about detonation or cracked/warped heads...ideas?

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although the fan is an integral part. don't rely solely on the fan itself. you don't want the fan clicking on and off and putting strain on the alternator.

 

i know, it wouldn't really happen in an instant, and you won't be changing alternators as often as underwear (3 month cycle, no!? :mrgreen:) but it's something to look out for with mega-high amperage fans.

 

If I were you I'd look at a colder opening thermostat so that it keeps temp down before the water gets too hot for the radiator to effectively cool the system. The longer you wait, the longer it takes, and the radiator does not change in size by itself. :P

 

Try using Evans NPG coolant if possible, email or call them and see what they can offer you for a street application. (and let me know what they say, I've not had the time to call them yet).

 

Also, try running de-ionized water to avoid rusting out the water galleys in your engine. I know a lot of people don't give a crap and never have problems, but why take chances when drinking water is the same price depending on where you look?

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Actually, I've the the issue right now where my thermostat is stuck open, so my engine doesn't warm up as fast, and with the cooler weather we've been having latly where I am, it doesn't fully warm up ever (only 10 degrees or so, but still). Luckily (or not), soon it'll be hitting 100+ every day, so I've got awhile to fix it :/

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yeah, i use filtered drinking water for all my coolant changes, the 3-4 bucks beats the hell outta replacing a rusted out motor or rad.

Ive got a 170' thermostat(not installed yet), think itll make a difference? or are there colder ones out there?

 

there should be 160 degrees available, but it probably won't make a difference in this case if you're at operating temp and not tens or twenties higher.

 

as mentioned, proper airflow to the rad and unobstructed cooling of all parts of the rad are important.

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Well, it turns out the 170' stat' is OEM BUT i ordered a NIsMO 63c/150f thermostat (60 frickin bucks!!!was 76.!!) it states that it fits most nissan mills up to '99 and will drop operating temps by at least 5 degrees F at full throttle, so ill install it tommorrow and post the results...

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