WRXtranceformed

Did a search and didn't turn up anything. I was browsing through Excelerate's new website and saw that on a few of the radiator caps for sale there were claims about radiator efficiency increases by using them. Something to do with a stiffer spring in the cap creating more pressure and lowering the boiling point of the coolant? School me, I can't imagine that a simple cap would make a drastic difference on your cooling system.

BLACKURA_NY

iTrader: (6)

cap makes higher pressure......i read a great article on it once...cant remember where

google it... spoon makes great caps... i think 1.3 instead of 1.1, increased the pressure, which increases the boiling point...something along those lines

stillhere153

iTrader: (1)

I've got a greddy one... 1.3... my friends rock skunk2 one's...

I like the skunk2 one better since it is black and red... if you want the greddy one holla at me...

Bearcat94

Increased pressure does in fact Increase the Boiling Point of a liquid up to the liquids "critical point".


Although I've heard of this before (High Pressure Radiator Caps), I don't see the point UNLESS you are reaching coolant temps above (or very near) the coolant boiling point.

As a reference:

Peak Long Life 50/50 = 226* Boiling Point (per MSDS)
Peak Global Life Time 50/50 = 226* Boiling Point (per MSDS)
Prestone 50/50 = 265* "Boil Over Protection"
Prestone Prime 50/50 = 265* "Boil Over Protection"
Valvoline/Zerex Original = 265* Boiling Point at 55% conc.


I *assume* Honda/Acura Coolant is similar: 250* - 275* Boiling Point at recommened dilution.

ballinfizzle89

iTrader: (6)

I have a GReddy 1.3, doesn't do much performance wise, just engine bling

01tl4tl

If the temp guage ever reads more than 1/2 in your TL- you have a problem
No cap is going to make the TL cool better
If you had a supercharger then we need to talk!

ussi

iTrader: (1)

...i'm listening..

stillhere153

iTrader: (1)

sssshhhh no whiners

BLACKURA_NY

iTrader: (6)

no whiners

on that question.. i had a TL and a TL-S... my type-s, that temp gauge NEVER goes over like...1/3.. the TL would go up to about 3/8...

i was doing some reading last night, i never knew the type-s came with an external tranny fluid cooler.. unlike the base TL's... good to know

Eoanou

I think after '07 all TL models came with an external tranny cooler, I guess it took them three years to realize the TL really needed one.

Bearcat94

Anybody know what the temps are for the Temp Guage? Also where is the Thermometer located - in a relatively "cool" place or a relatively "hot" one?

Mine guage sits dead center ('07 TL-S) once the car is up to temperature.

Also curious what is the MAX coolant temp anywhere in the cooling system? If the max temp approaches 250*, anywhere in the cooling system, then a high pressure cap *might* be marginally helpful.

My *guess* is that Stock, under "normal" conditions the max temp is well below 250-ish, so no chance the coolant will vaporize. But under extreme conditions, S/C, etc -

BLACKURA_NY

iTrader: (6)

dead center?? really? no kidding. mine will NEVER EVER go over 1/3 of the way up.. even when i drive 3 hours straight in the summer... hell, even why i dyno it or floor it...

WRXtranceformed

Is yours an 07 or 08 TL-S? I didn't know they had tranny coolers either..

Bearcat94

Yeah. Really. I'll double check and watch it over the week-end - it's going to be HOT! HOT! HOT!, but I am 99.9% sure it's dead center and stays there once it gets warm.

BLACKURA_NY

iTrader: (6)

08 TypeS

Yea i didnt know either, i was reading it last night in this article

WRXtranceformed

Sweet, I'm guessing mine comes with one too! Good to know.

My temperature gauge usually stays a few ticks under half on my 07 TL-S.

Bearcat94

Forgot to post back. Mine is the same as yours - not dead center. It points dead to the right (3 o'clock position) but after looking closer, that is few ticks under dead center.