Over heating?

Ok so i am talking to a friend of mine who used to own a 1992 N/A 300zx about if he knows anyone who has one up for sale. He says puzzled " why do you want one of them " i tell him its a beautiful car i would love to start on a tuner that will make eyes pop ! lol he says " the Vg30s are shit , with cooling . mine i had to run a bigger cooling kit and better fans when i got to about 450 hp ."

so are they really that bad with over heating ?

also from what i remeber when i was younger my mom had a 1990 N/A 300zx and the dealer told us to get rid of the thing before 90k . sure enough at around 80k miles it started knocking alot !

If anyone can through in some insite to this that would rock

Your friend had an NA Z32 making 450HP? That's a load of crap... he lied to you about his HP. ask him for a dyno sheet next time you see him. As far as over-heating??? Even highly modified-well maintained NA Z32's are still using the stock radiator or a slighly bigger Maxima radiator.

I have only had one time where my NA Z32 overheated (and I live in the desert) and that was because my heater hoses were busting and I was loosing coolant. Bigger radiators are not necessary on a VG30DE. Just plain ol' maintenance. Electric fans would be great to free up some power though.

Maintenance is the main key for the Z32 and all cars for that matter. My NA Z32 is running close to 125K miles and is still running strong.

i think your buddy needs a good kick in the balls for thinking that he's making 450hp on an n/a vg30...

The dealer just wanted to sell your mom another car. i know many Z's turbo and N/A that are running smoothley at well over100k

AHH i wouldn't think he is lieing because he just finished his 3 year projects on his Civic he drop a k20 bullet proof running 9.0.1 with a t70 turbo and he is hitting in the range of 750hp @ 20 PSI he isn't done dyno testing but i seen the sheets for that . needless to say he isn't talk talk talk . i have seen picture of it and all the work he does on his cars in the past. but another thing . does it make a differents if the injectors are top or side? what year did it change over?

overheating is not really an issue with the VG. they run fairly cool and have no trouble staying at a decent temperature as long as everything in the cooling system is working properly and you upgrade the radiator at the proper time in the path of modifying. do NOT put an electric fan on a TT until they have been proven to keep things cool. as of right now, nobody has designed an electric fan kit for the VG that is as effective or more effective than the stock clutch fan and shroud set-up.

on the other hand, heat is an issue...but not overheating, temperature in the engine bay get really hot due to the lack of room and lack of venting in the hood. this just amounts in the wiring harness not lasting decades and premature sensor failure.

overheating is not really an issue with the VG. they run fairly cool and have no trouble staying at a decent temperature as long as everything in the cooling system is working properly and you upgrade the radiator at the proper time in the path of modifying. do NOT put an electric fan on a TT until they have been proven to keep things cool. as of right now, nobody has designed an electric fan kit for the VG that is as effective or more effective than the stock clutch fan and shroud set-up.

on the other hand, heat is an issue...but not overheating, temperature in the engine bay get really hot due to the lack of room and lack of venting in the hood. this just amounts in the wiring harness not lasting decades and premature sensor failure.

Ok i can live with that then

The only time that i have ever seen one come close to overheating is after a motor swap and we screwed up a brand new thermostat.otherwise when a friend screwed his up when runing like 20 -30 psi and fried the rings, now when he does 90 for a little bit his gets pretty warm and thats a 95 turbo

he's running on a fried engine? that's kind of silly...

he's running on a fried engine? that's kind of silly...

let me guess...that 20-30psi was on pump fuel and stock turbos too. :rolleyes:

AHH i wouldn't think he is lieing because he just finished his 3 year projects on his Civic he drop a k20 bullet proof running 9.0.1 with a t70 turbo and he is hitting in the range of 750hp @ 20 PSI he isn't done dyno testing but i seen the sheets for that . needless to say he isn't talk talk talk . i have seen picture of it and all the work he does on his cars in the past. but another thing . does it make a differents if the injectors are top or side? what year did it change over?

I'm still calling BS...

What mods does he have?

I met the him/ chris about 3 years ago right after the got rid of it and it was a beautiful car he even did sund cmps with it and he ran high 10s with it also i seen the picture of that to. but doesn't matter ! main thing i would like to know what are the main problems to exspect from the Z32s so i can get right on them

He is parting it out aoon but doesnt have a lot of money, i would guess that is why he runs it with fried rings, stupid, but works for him. I'm sure it was pump gas and most of his parts are stock so I would guess they were stock turbos, that is actually an 85 turbo not a 95, he is also now in college, another money issue.

He is parting it out aoon but doesnt have a lot of money, i would guess that is why he runs it with fried rings, stupid, but works for him. I'm sure it was pump gas and most of his parts are stock so I would guess they were stock turbos, that is actually an 85 turbo not a 95, he is also now in college, another money issue.

wow he must REALLY be poor if he can't fix up a z31 lol.... poor car doesn't deserve a fate like that

wow he must REALLY be poor if he can't fix up a z31 lol.... poor car doesn't deserve a fate like that

wow...20-30psi on a stock T25 Z31 turbo. i don't even think it will flow that much air but reguardless, talk about out of efficiency.

i'm tired of the overheating shi!!!....man.... NISMO thermostat, KOYO radiator, Dual Electric fans (Spal) and still overheating. i don't know what to do after all that. any Z31 experts in overheating problems
http://i27.photobucket.com/albums/c186/aldhaheri/1233249653_l.jpg
http://i27.photobucket.com/albums/c186/aldhaheri/1233265345_l.jpg

well the 84-87/7's had t3 turbo's, they went to the smaller t25's when they switched over to the W series engines...

anyway masood have you tried cleaning out your radiator? completely flushing your coolant? i know tons of guys running stock radiators at high hp levels and not having a single problem with overheating...

I don't think he wants to fix it, he is thinking about parting it out, another fried wants to buy the turbos for his 86 n/a

I'm confused... are we talking about an NA or Turbo-car???

corection 15 psi for boost on a t3 turbo i thought i heard 20+, it is a 1985 turbo, t25 didn't come on the 85s

15 psi on the t3 is pushing it, but with an intercooler most people are ok... as long as the turbo is in good shape anyway.

running that unintercooled is asking to be shot

Im not sure what he had for an intercooler, i just know it is a stock 85 turbo 300zx

I'm confused... are we talking about an NA or Turbo-car??? Joe has the 85 300zx turbo w/ fried rings, Matt has the 86 300zx N/A and wants to buy the turbos from Joe because Joe is parting out his 300zx turbo, two different cars

Im not sure what he had for an intercooler, i just know it is a stock 85 turbo 300zx
well that explains it... there's no stock intercooler on any z31 lol..

where would be a good spot for an intercooler on an 86 z31

I thought that if u put it in front of the radiator u might run hot or overheat because the water running through the block cant cool enough

nope... hks even had a kit that used the front mount... along with 95% of any other aftermarket turbocharged car that's running an intercooler (they use a front mount configuration)

ok i guess iv always been told to never put any thing in front of the radiator, could i then put a cone type coldair intake in front of my radiator behind my grille in my 90 buick century

if you wanted to...

is it worth it though to put it there versus in the fender just in front of the tire

no not really... it's probably better to put it into the fender because it's sucking air that isn't quite as turbulated as if it were sucking from in direct path of airflow...

how would I be able to keep it from getting muddy or dirty when I do drifting, mud/snow bogin and whatever else?I need a place where I dont need to clean it every week or so

uh.. usually it should be inside an enclosed fender wall... so there's no possibility of getting any mud/water onto the filter from the tire...

except for the hole that is in the bottom and part of the inner side

are we talking about putting a cold air intake on a buick century?

might want to ask the pros over on the buick forums.

^ I dunno... ^

This thread has jumped around so much. I thought we were talking about an NA Z32 at first............................................. ..

DeleriousZ : my car has a brand new aluminum KOYO radiator for 240sx 95+ , lower temp NISMO thermostat. the intercooler might be blocking the Air from going to the radiator. :disappoin :disappoin :disappoin

i doubt it... if it's fine at idle it should be fine all the time... if it's overheating at idle you have other problems

are we talking about putting a cold air intake on a buick century?

might want to ask the pros over on the buick forums. Yes, The fact that it is a "grandma car" (has some balls for having a name like that) says that few people modify them, but some do and they have helped some, I have looked and posted many threads in the buick forum, some helpful and some not, I think that I would get better results talking to people who have sport or tunner cars and do this kind of stuff, and learn that way insted of wasting time and gas driving 20+ miles to the nearest tunning shop in south dakota, I do have a few friends that have sports cats like the 300zx (currently helping one of them repair his) they are some help to a point.

DeleriousZ : my car has a brand new aluminum KOYO radiator for 240sx 95+ , lower temp NISMO thermostat. the intercooler might be blocking the Air from going to the radiator. :disappoin :disappoin :disappoin

those electric fans may not be flowing enough air for your engine to stay cool. do you have a shroud for the E fans that cover the face of the radiator, which would force any air the fan blows to go through the radiator.

how is that headgasket looking?

what kind of electric fan converson setup would u need for a z31 turbo

i know this has almost no meaning but the reason he might be over heatingwhen at idol is because the fans aren't working right . i know in my old junk sunfire the thing would over heat because i didn't deam it worth it to replace the fan . but when i was moving it was fine . so just make sure it is running right. and allways remember to check all your hoses i am sure you have but just figured i would throw out the most simple things

Yes, The fact that it is a "grandma car" (has some balls for having a name like that) says that few people modify them, but some do and they have helped some, I have looked and posted many threads in the buick forum, some helpful and some not, I think that I would get better results talking to people who have sport or tunner cars and do this kind of stuff, and learn that way insted of wasting time and gas driving 20+ miles to the nearest tunning shop in south dakota, I do have a few friends that have sports cats like the 300zx (currently helping one of them repair his) they are some help to a point.

run the intake through the inner fender into the wheel well. this area gets fresh air and turbulence in the air stream becomes a non-issue.

that's what i said but i think he's missing a few of the fender pieces that close off the wheel well... i know i am on the 88, but whatever, they need to be removed for the ic piping anyway

i think the intercooler is blocking the air from going to the radiator. the HKS goes under the radiator not in the front as i set up my intercooler, that is why my car is overheating.