Well i've made a few threads about my cooling woes in my LS turbo, but i've made some progress in diagnosis, please help me.

setup:
B18B1 with Greddy 18G Turbo
Koyo full size AL radiator with Koyo 1.3 (18.8psi) cap
New Thermostat from a japanese OE parts supplier (it opens and closes at correctly)
2 10" slim fans, one mounted in engine bay (passenger side) puller, the other mounted in front of condenser, pusher...

So the updates are:
Pressure tested cooling system to 19 psi no leaks, no drop in pressure after 15 minutes.
The cap holds at 19 psi.

And then I borrowed a laser pyrometer...

The t-stat housing outlet hose reads about 205F, and the upper hose inlet to the head reads 185-195F after going through the radiator. Common knowledge tells me this is normal.

playing around with the pyrometer though, i found in front of the turbo and its related parts, the radiator was reading temps in the upper 200's...like 275-285. since the other slim fan didnt fit there, does that indicate a blockage in the radiator, or just a hot spot since thats where the turbo parts are?? It seems that the pusher fan in front of the condenser isnt moving much air.

this has been bugging me for the last two weeks...anyone with a koyo or fluidyne and a turbo please help...

 

please help!

 

is the car itself indicating overheating? normal turgbo operating temps are usually 205-225 average. if your getting higher than that, then you need to look into the problem, if not, then don't worrie about anything else is my thoughts.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by oscarmayer &raquo;</TD></TR><TR><TD CLASS="quote">is the car itself indicating overheating? normal turgbo operating temps are usually 205-225 average. if your getting higher than that, then you need to look into the problem, if not, then don't worrie about anything else is my thoughts.</TD></TR></TABLE>

the car itself is not indicating overheating. i'm just a bit irked because i never saw the gauge go past halfway before the koyo/slim fan swap. i'll drive around right now (in the heat of the day) to expose some heat into the system and take new readings.

 

weird.

i drove around town for 10 minutes, came back home, then let the car idle with the engine/fans running for another 20 minutes, and the surface temps of the hoses wont go over 200F...


the gauge remains just below the water temp icon in the cluster.

 

oh ok i drive around now, it goes way past the halfway point...now that its past 7pm on the west coast.

 

bringing the topic back because i have the same problem now...


What is the cfm of the pusher fans?

i have a similar problem when driving home in the 90+ temps after work and the AC on, 15 mins into highway drive my temp needle creeps up above halfway mark. The drive in the morning or mid-day does not overheat at all...

is the stock radiator not able to exhange anymore heat?
i have a stock eg radiator, with a 10" slim pusher fan.

 

bump...

drove around last night for about an hour stop and go traffic w/ no overheating.

can a radiator get so heat soaked that it won't exchange heat properly anymore?