Cooling problems

[Joe]

Anyone have cooling problems with their RB's?

i drive mine...pretty ****ing hard on track and i get cooling issues when it starts to get warmer outside.

anyone have some ideas about cooling better? i personally done buy into the whole koyo hype but maybe someone can sway me.

[nismofly]

C&R dual pass or something, i think Alan might know how to get one that fits the 240

[Kansei240sx]

Well if you're still running that Radiator that you have in the pictures, then i'd extremely reccoment getting an all aluminum racing radiator from koyo, or the Copper core radiator.

Choosing something becuase of hype and possibly damaging your engine is a bit rediculous.

I switched to a koyo and i drive the piss out of mine around our private track and it runs 175-180 degrees on my oil temps rather than the 220 it did with the stock one after just getting a few laps in.

[Joe]

ok yea see thats my point

the koyos dont do that much. honestly they dont. we have 100+ degree air tempratures at some track events here, thats 125 just above track level and out of all the RB owners that track their cars they all have had cooling issues just as bad as a stock radiator (not to mention SR and KA-T guys too)

the koyo is a hype item IMO. koyos are aluminum ALLOY, meaning its a mix of a bunch of other metals along with aluminum that dont transfer heat half as well as aluminum or even copper.

true 3 row copper > koyo aluminum "racing" radiator. aluminum conducts heat half as well as copper thats why when getting a koyo thats over twice as big (3 row vs 1-2 row stock radiators) you only get a 20-30% increase in cooling

im not denying a koyo is an upgrade over stock, but to me 300+$ for a small upgrade in cooling effiencey is totally not worth it. and since i only have issues when its hot outside on track, ive just lived with my stock radiator. its been going 2+ years now of HARD driving.

[DrifterTom]

i had mad problems. i thought it was the radiator, so i replaced it w/aluminum. not koyo, custom and cheaper. it didn't help much., so i thought it was airflow. i added another fan, didn't help. then i took out the a/c condenser, didn't help. my last attempt was replacing the undercar splash guard and an aluminum piece for up top. low and behold it worked. i also made flashing so there were no gaps between the radiator and body. turns out i was moving air, but it was all taking the easy route and escaping. i decided to try this after reading a great write up about 240s and benefits from koyos/fans/cowls. their experiment was very scientific and was tested well. i agree with their results. i don't remember where i found it, but i am sure it was on here. i think the kids were testing it with an sr though.

[Eikon]

Yeah... I was going to bring up the same thing that DrifterTom said... he's smart.

It doesn't matter how good your radiator is if the air doesn't move through it. Getting a tray or something to keep air routed properly would sure help.

Also... do you have an oil cooler? That might help... cooler oil can help keep the engine cool as well.

just a thought....

[Joe]

thats great info guys, i never thought about that lower splash guard.

the car is in the midsts of a huge set of upgrades at the moment (seat, rollbat, harness, wheel, gauges, oil cooler, etc) so ill have to see if i cant fab some stuff up out of thin gauge metal.

[krayton]

what. u have to ask this. i finally find the solution and u have to go and ask this...

...pfft....stupid moderator...

:P

[Joe]

yea i would ask you but

1) your RB is blowned up

2) you arent fixing it

3) you are KATing your daily

4) you are always with your woman and never around

now answer the question or ill go over there and hit you.

[krayton]

hahaha..haha...ha.....

ducting!

my final setup with no heat problems what so ever was koyo, flexalites, distilled water with water wetter. and a whole mess of ducting.

which i didnt even finish the bottom half.

ducting is the key!

[eh?]

Well first off I'm not sure why you stuck with a stock radiator that's made for a 2.4 four banger for this long. The RB's are obviously bigger and the first thought that came into my head was to buy a larger radiator (either oem or afmkt). Coolant capacity FTW.

Secondly I've had zero problems with my AL Koyo and ebay special fans for over 3 years. Never had a problem with 10-15 minutes of hard driving or spending 1-1 1/2 hrs of nyc stop and go traffic in august in the 90 deg heat and 100% humidity.

Here's that test the other guys were talking about.http://home.satx.rr.com/nissan...t.htm

[Joe]

Well first off I'm not sure why you stuck with a stock radiator that's made for a 2.4 four banger for this long. The RB's are obviously bigger and the first thought that came into my head was to buy a larger radiator (either oem or afmkt). Coolant capacity FTW.

i didnt have any cooling issues till i put a FMIC on and upped the boost. thats why i kept the stock s14 rad.

[Valley]

good ole' fmic's. always getting in the way of that clean unadulterated radiator air and messing it up.

seriously though... ducting. or perhaps bumper mod?

zerothread?id=143660

[eh?]

You guys were having issues since last year september zerothread?id=137470

I remember that thread :p

[Joe]

You guys were having issues since last year september zerothread?id=137470

I remember that thread :p

christ i wish i was still only "running warm" hahaha

that was before the heater being on even lol, now with the heater at full blast i get hot halfway through a session and have to lollygag down the front straights to cool down

[Joe]

good ole' fmic's. always getting in the way of that clean unadulterated radiator air and messing it up.

seriously though... ducting. or perhaps bumper mod?

zerothread?id=143660

id rather overheat

[NightKids2]

My car runs so hot its just stupid. I dont have a gauge so I dont know exactly how hot, but now that its getting warmer outside we run it for 10-20 minutes and I burn my hand on the hood stand its so hot. Im running a Koyo radiator and dual 12 inch pullers, and its still super hot. Even my pipe comming off the intercooler is too hot to touch.

[Eikon]

My car runs so hot its just stupid. I dont have a gauge so I dont know exactly how hot, but now that its getting warmer outside we run it for 10-20 minutes and I burn my hand on the hood stand its so hot. Im running a Koyo radiator and dual 12 inch pullers, and its still super hot. Even my pipe comming off the intercooler is too hot to touch.

You better get a gauge before you overheat and warp your head.

RB's do fill the engine bay with heat though... I have no cooling problems at all (I almost never even turn on my fans).... and my engine bay still heats up pretty good.

Still... not smart to not know what temp your running at. Heat is one of the worst killers of an engine.

[kouki-gymkhana]

id rather overheat

Hey, no need to hate on my POS so much! I explained my reasoning for the holes in the thread

[David_NISMO]

Here's my solution, have yet to try it out in summer heat. I also removed a large section of my bumper support, but kept the corner pieces.

http://www.kzoorice.com/forums...=1752

I'm going to put a vent in the top of the hood above the turbos. This should create a low pressure in the engine bay and encourage more air to move into the bay, hopefully through the radiator cowling. Secondly, by putting the vent above the turbos, I'm hoping that the extra air movement will help to dissapate the radiant heat from the turbos.

[Shocker]

i recommend a fluidyne then, i ran my RB hard all after noon on sunday, granted it wasnt 100 outside it was about 70, but the needle never moved above half way, ive got dual permacool pushers and a FMIC.. soo far soo good. could always give some wetter water a go as well, and flush the coolant for kicks.

[rbsileighty]

Oil cooler you are installing should help a good bit... wouldn't worry to much until after you start driving with that...

Ducting is key for Rad eff...

Flush your rad also... also a big help

You'll love the cage... HUGE help on my S13

[RB20DETodd]

DUCTING like kryton said, and **** that bling radiator, i know people that overheat with it, get some mans fans http://thehoffmangroup.com:16080/zirgo/, 3 bottles of watter wetter and straight water, i dont thing its freezing anymore there? I run the COPPER Koyo oem replacement radiator runs like a champ, hard to find but they come through on ebay every now and then, my 2 e fand took a **** when i drove through 2 feet of watter when i was flooding here a few weeks back, so im gonna try and squeeze 2 14'' Zirgo fans in.

Copper ownes!

http://home.satx.rr.com/nissan...t.htm

[240SX GT-S]

Where can one get a copper koyo? I can't seem to find anyone that carries anything other then the aluminium.

[blk90s13]

DUCTING like kryton said, and **** that bling radiator, i know people that overheat with it, get some mans fans http://thehoffmangroup.com:16080/zirgo/, 3 bottles of watter wetter and straight water, i dont thing its freezing anymore there? I run the COPPER Koyo oem replacement radiator runs like a champ, hard to find but they come through on ebay every now and then, my 2 e fand took a **** when i drove through 2 feet of watter when i was flooding here a few weeks back, so im gonna try and squeeze 2 14'' Zirgo fans in.

Copper ownes!

http://home.satx.rr.com/nissan...t.htm

u use 3 bottles of water wetter ?

[RB20DETodd]

u use 3 bottles of water wetter ?

yes, for anti corrosion, and lubrication

[blk90s13]

yes, for anti corrosion, and lubrication

i am buying 3 bottles tomorow and some dist water

[Sky240PWR]

i had mad problems. i thought it was the radiator, so i replaced it w/aluminum. not koyo, custom and cheaper. it didn't help much., so i thought it was airflow. i added another fan, didn't help. then i took out the a/c condenser, didn't help. my last attempt was replacing the undercar splash guard and an aluminum piece for up top. low and behold it worked. i also made flashing so there were no gaps between the radiator and body. turns out i was moving air, but it was all taking the easy route and escaping. i decided to try this after reading a great write up about 240s and benefits from koyos/fans/cowls. their experiment was very scientific and was tested well. i agree with their results. i don't remember where i found it, but i am sure it was on here. i think the kids were testing it with an sr though.

I remember that artical, with the Koyo al radiator(which i have), the altima fans worked better together then the FAL twin fans did with the Koyo + the fans are cheaper! I was having trouble with over heating before my car went into the body shop. I did buy the altima fans for $35 and a cf cooling panel for $100(found cheaper but I liked the bling factor) and I'm going to do the splash guard and make sure no air is going around the radiator and get a oil cooler.here's a pic of the cooling panel

[Valley]

that panel looks good.. where'd you find it?

[Sky240PWR]

ebay for $100, looks nice in person too