temp rises too quickkly at 120mph

[coupebuddy]

ok I have a 96 motor w 93 harness and auto ecu steel auto radiator new temp sensors(both) new radiator cap.my car has been plauged w this overheating problem.I have no heater and the water hoses has a bypass from rad inlet to outlet (between intake mani & block)I realized that the heater 1 heater outlets(the rear 1)still has water going to it so I flushed the sys per the specs allowing water 2 blow out the line then fill it with the bleeder out.highway driving at normal speeds is now perfect (city 2).but if I travel 110-120 for 5min or more temp rises quik.also did blok sealer and no water in oil and no oil in coolant not even the smell in coolant so I do not suspect head gasket can any help I would hope I know my **** cause I do motor swaps and rebuilds all the time (3rd hustle)but I just cant seem to peg this ****.so some feed back pleeze

[pancho y onions]

Maybe its a sighn to not drive that FAST FOR 5min!

[spec-u-later]

Are you serious? "Oh look at me, I drive at 120 for 5 minutes". Your a ****1ng moron. But if you have overheating issues at 120 then simple answer would be DONT DRIVE 120 ****1NG MILES PER HOUR!!. Even better sell your car and get a civic before you kill someone. Shesh.

[Darius]

^^ I'm with him.^^ You're stupid for going that fast on a public road and for trying to "test" anything with your car at that speed. Better yet, go buy a Chevy Cobalt if you're gonna act that way.

[kamikazestorm420]

ok I have a 96 motor w 93 harness and auto ecu steel auto radiator new temp sensors(both) new radiator cap.my car has been plauged w this overheating problem.I have no heater and the water hoses has a bypass from rad inlet to outlet (between intake mani & block)I realized that the heater 1 heater outlets(the rear 1)still has water going to it so I flushed the sys per the specs allowing water 2 blow out the line then fill it with the bleeder out.highway driving at normal speeds is now perfect (city 2).but if I travel 110-120 for 5min or more temp rises quik.also did blok sealer and no water in oil and no oil in coolant not even the smell in coolant so I do not suspect head gasket can any help I would hope I know my **** cause I do motor swaps and rebuilds all the time (3rd hustle)but I just cant seem to peg this ****.so some feed back pleeze

[jr_ss]

Go figure, it's a noob/newb/nub

[pancho y onions]

Serisoully you should be thinking that there are other people out there not JUST YOU!THINK MAN!

[kona240]

driving at 120 for more then 5 mins should do that. my best bet to solve that is not to drive at 120 for that long. please stop be for u kill urself or worse and destory a 240

[tonynalli]

my god people you act like youve never driven over 120 mph...so all of yall shut up...try your waterpump..could be the problem..not sure

[pancho y onions]

yeah ill admit it ive driven at 110 but NOT FOR 5min. When your doing that you definetly have a higher risk of hurting some one! And by reading what he says makes it sound like he does it frequintly...............

man i really need a dictionary when i type

[kamikazestorm420]

my god people you act like youve never driven over 120 mph...so all of yall shut up...try your waterpump..could be the problem..not sure

i have .. but like he said not for 5 mins.

[spec-u-later]

my god people you act like youve never driven over 120 mph...so all of yall shut up...try your waterpump..could be the problem..not sure

Tell you what. Why don't you two ride together so we can kill two birds with one stone.

[jr_ss]

I'll tell you what happens, the engine is spinning in the higher rpms, the water pump is also spinning at a relatively high rpm. This can cause cavitation in the water pump and will prevent the pumping of water efficiently from the engine. This is why you over heat, no water flowing through the engine. As stated, becareful on the road man, we've all done our part at high speeds, take it to a race track or an empty highway. Try not to cruise at 120 for 5 mins, can be havoc on your engine as well.

[UK-SRi]

Well if you are on a German Autobahn that is pretty much the minimum speed for the fast lane...;-)

Mike

[virus77]

German cars that can maintain 120 cruises (Definalty not a 240sx) are all built with tall gearing so the rpms are relativly low at those speeds. Japans cars are limited to 118 mph top speed in their country with over 3 grand in rpms at 80 mph. If you are doing 120 for 5 minutes in a 240 on any of the US highways you are an idiot.

[Darius]

You could be right about the cavitation. If the water pump is spinning so fast that the velocities in the piping ahead of the pump are high, it could cause large enough head losses to cause cavitation (air in a liquid caused by vacuum) on the inlet side of the water pump. This hinders the pumping rate, but more importantly is putting considerable wear and tear on your water pump.

Everybody has come down on you pretty hard for driving like an idiot, but we're just trying to avoid having one of those posts where a friend of yours writes in saying, "R.I.P. another NICO member". Then everybody says sorry to hear that you died and how cool of a guy you were to them and all that crap.

[tyrannix]

wow, i thought it was a valid question

he never said where he drives like that, maybe it is a private road or track (maybe)

heres suggestions in lowest-highest price order

and first check your thermostat

if thats cool, you might want an underdrive pulley for your water pump (to prevent cavitation like that)

third would be get a lower ratio gearset in that diff (easier than regearing transmission) that will reduce your revs at high speeds, at the cost of some acceleration

after that you should look into a fat radiator and oil cooler (and if you are handy with power tools, you can make some mods to allow more airflow into your engine bay

[Florida240sx]

Is your hood well vented? At that speed for so long airflow may be reduced.Most 240's never have ahd the issue but they never go for more than 60 seconds. At 5minutes engine is producing so much heat it could be trapped so it's just heating your pipes. My turbo makes my A/C warm because it put out so much heat. Still got the insulation under your hood? Maybe add a vent, or jack-up the hinges of your hood to allow the air to escape. Just my idea, but water pump theory seems to be a valid solution as well.

[UK-SRi]

Jacking up the hood is counter-productive as the back of the bonnet is a high pressure zone that pushes air into to engine bay.

Mike

[tonynalli]

you are right...going over 90 is stupid but...what about when you are on a country road like for example "avenue G" and there are about 5 or 6 other people going just as fast as you are..i mean damn no one knows me on this board but hell half of yall take a risk just starting your cars..granted the chance of you dying while starting your car is pretty slim..but just driving on the interstate and 80 just cruising is dangerous also..but just out of curriosity...i hit red line in 5th last night...anyone have any clue as to how fast that could be..i have 16s on my car and factoring in the tire streching and possible wind resistance...i wish i had my GPS with me but it was a new road and my passenger was kinda freaking out because it was about 1 in the am and we were going 130+..but anyways...ive yet to ever have any over-heating issues with my new motor and i would say that i was flooring it about for 5 to 10 minuets..

[pancho y onions]

True there are risks for every thing you do. Even whel your walking down the side walk never know a car might lose control and hit you. Even when your walking down the stairs might break a neck. But why go that fast when you know its dangerious? I mean its ok if you go for a little bit dont blame you but why so long? Never know if your tire goes out see a deer run right infront of you or hell even get a big a$$ ticket. Not saying its wrong but think when your doin it.

[tonynalli]

very true..but you have to realize what teh guy was asking...my car over heats at 120...not why should i not be going 120...what if there is a big as road that he can go on 120 and not harm anyone but himself..kinda like when someone is like "i wrecked my car drifting in the publix parking lot" well yall are like .....learn to drift and what do you need to do to fix it..not WHAT THE **** WERE YOU DOING DRIFTING..drifting is very very dangerous..but almost all you yall do it..so answer the guys question and...be done...

now all you need to do is get an underdrive pully for your water pump and you will be fine

[pancho y onions]

I agree i do the same thing to ive wrecked my 240 befor drifting hit the curb and all you can do is fix it. Ok no more about this thing about speeding its true he never said on what kind of road hes driving in.....so i guess im jumping too much. But ok no more about giving him poo about this stuff and lets answer his question.

Sorry man about giving you crap

Yeah if you plan on going that fast for a while try investing in an after market radiator and oil cooler and if you can find a betterwater pump try buying that to. and also try getting better ventillation so the haet can come out. sorry about the crap. FREAINDS

[coupebuddy]

I drive on i75 in ft laddy daddy fl where speed limit is 75mmph and eveyone drives 120 also theres 7 lanes so an experienced driver can handle it.I may try an oil cooler .water pump,or vent the hood all I know is when I slow down the temp goes down.

[tryiian]

uh, yeah,

No way people get away with that on a regular basis in any major city with a functioning highway patrol. That aside, most cars I see on the road are either incapable of going 120 stock or would be pushed to their limits to reach that kind of speeds. So much for the idea that he was doing it somewhere more sensible, he should`ve just not bothered mentioning where or why he`s going that fast and stuck with the benefit of the doubt people were giving him.

[Florida240sx]

uh, yeah,

No way people get away with that on a regular basis in any major city with a functioning highway patrol. That aside, most cars I see on the road are either incapable of going 120 stock or would be pushed to their limits to reach that kind of speeds. So much for the idea that he was doing it somewhere more sensible, he should`ve just not bothered mentioning where or why he`s going that fast and stuck with the benefit of the doubt people were giving him.

This thread is over now......

[S13 Charlie]

Not to mention that most passengers tires are not, in fact, rated for speeds of ~120 mph.

[NIGHTfall_240sx]

I drive on i75 in ft laddy daddy fl where speed limit is 75mmph and eveyone drives 120 also theres 7 lanes so an experienced driver can handle it.I may try an oil cooler .water pump,or vent the hood all I know is when I slow down the temp goes down.

...actually, i drive in.. uh.. "laddy daddy" every day... and no one drives a buck 20 on i75 ... you are just a jackass.

and who are you to call yourself an experienced driver? lol.

you are more of a tool.

[virus77]

ownage from another Florida driver, got caught red handed.

[coupebuddy]

I see every one else in their m3s and such drivin that speed and I was run w 2 other s13 coupes at that speed so just cause u drive like an old lady doesnt mean u can knock me.look for me driving on the shoulder and in the grass cause when it comes to winning its balls to the wall.u only live once!