Best next Step to Track Cooling issues?
So I'm still having cooling issues at the track, I would like opinions on what my next best step should be.
My setup: 91-1.6 Greddy turbo, RM 2.5 Downpipe, 2.5 Enthuza, and TDR IC, Amsoil 10w-40 BEGI AFPR, Bipes, Hustler's Pink/Red Injector's (NB 1.8's) Godspeed Radiator, siliconintakes.com fans in parallel, belly pan, shrouding on bottom sides and top of radiator, AC ~15% coolant mix, waterwetter BEGI Street Reroute (Heater return to upper radiator hose, metal line under the exhaust manifold capped off) Trackday problem on Friday; Afternoon, ambient temps ~100°F This was in San Marcos, TX at Harris Hill Road 1.78 Mile Roadcourse Top Speed's in the 80's The first session, I let the car idle for ~10 minutes whilst waiting for the session to begin. I did the warm up lap and had 2-3 good laps before I noticed the temp gauge starting to move. After another lap at 8/10 it was at the 1 o'clock position so I pitted to let it cool down. It got hotter, roughly between the 1:30 and 2:00 position. Next sessions less idle time meant I got more clean laps in prior to pitting. The third session and fourth session I didn't pit (and kept the heater on the whole session). There were not very many cars so I took it down to 5/10's for a couple laps to cool down and then finish the session strong. My current options, from most desirable to least desirable: -Oil temp gauge and real coolant temp gauge or linearize it, find out what temps I'm really running -Oil Cooler, cutting out spot for the cooler through the belly pan -hood ducting/vents to increase airflow (I like the price for this mod but don't like the less than stock look) -Double pass radiator ala M2CupCar Should I really be worrying about temps ~1 o'clock? This is about as hot as it gets for a TX trackday. Will an oil cooler effect my temps enough to keep coolant temp down a reasonable amount? Chris |
First, get real temp gauges - a decent autometer electrical water temp gauge is like under $50 from Summit. I've noticed several heat issues with my real gauge when the stock water gauge hadn't even begun to move. "1 o'clock" could be 220 or 250 degrees, who knows.
#1 recommendation from me would be oil cooler. Oil has a much higher thermal capacity (I think that is the right term) than water i.e. it wants to stay whatever temp. it is - it takes longer to heat up than water and once it is too hot, even after you baby it and the water temp is reading OK again, the oil will still be too hot. If you can keep the oil temp cool (within proper range), it will help keep the whole motor cooler - so the water will have less work to do instead of the water trying to do all the work itself, fighting the high oil temps. -Ryan |
Originally Posted by Miatamaniac92
(Post 407241)
Will an oil cooler effect my temps enough to keep coolant temp down a reasonable amount?
Chris Yes. |
Well I think a true temp gauge is mandatory.
Beyond the oil cooler another option would be a waterless coolant like those from Evans which should help at least moderately. |
shroud the front of the radiator, then try again. Air would rather go around the heat exchangers than through them.
|
http://i40.tinypic.com/2zhe6pz.jpg
http://i41.tinypic.com/2rr6hz4.jpg http://i41.tinypic.com/238i2c.jpg The top is sealed up a the intercooler which sucks...I need BEGi to move my intercooler back 3", until then I'll use the scooper yet to be installed. whyhellothar http://i41.tinypic.com/affy3t.jpg needs more miatas: http://i40.tinypic.com/166lpck.jpg edit: vascularity you can only dream of: http://i41.tinypic.com/2dt3c4k.jpg |
Needs more hustler on track.
|
Originally Posted by BenR
(Post 407333)
Needs more hustler on track.
|
Originally Posted by Miatamaniac92
(Post 407241)
shrouding on bottom, sides, and top of radiator,
Originally Posted by hustler
(Post 407329)
shroud the front of the radiator, then try again. Air would rather go around the heat exchangers than through them.
Is that Gary's new shop? Chris |
1 Attachment(s)
Cut a hole in your bumper cover....
Attachment 205985 |
Originally Posted by hustler
(Post 407334)
If I weren't in Philly right now, I'd be under the car turning wrenches.
Chris |
Originally Posted by Miatamaniac92
(Post 407338)
Don't get mugged, that's one dirty city.
Chris |
Originally Posted by Miatamaniac92
(Post 407336)
It's all shrouded in.
Is that Gary's new shop? Chris yes |
Originally Posted by Cspence
(Post 407337)
Cut a hole in your bumper cover....
http://i389.photobucket.com/albums/o...g?t=1240448913 |
I love how clean that bay is ^
|
Originally Posted by hustler
(Post 407341)
why? It doesn't raise pressure. Do you have a vented hood? Bernoulli FTW!
I had a hole cut in my old nose. There's no hole in my new RB nose. Take that as you will. |
Chris -
If you have a 1:3 ratio (inlet to heat exchanger) and you have shrouded to prevent air by-pass, then the next step in optimizing that particular coolant system component is heat extraction. - Meaning venting. The autokonexion hood, BEGi's hood vents or roll your own. Another option is to add another component to the coolant system. An oil cooler has already been discussed and sounds like an excellent idea, provided you do not get your oil temps too low during routine driving. (Corky is working on an oil cooler by-pass system, though I'm not certain how close it is to "prime-time"...) - L |
Originally Posted by Miatamaniac92
(Post 407338)
Don't get mugged, that's one dirty city.
Chris |
Originally Posted by hustler
(Post 407339)
a tranny hooker just offered me her "clean" ass for $50 right when I walked out of my hotel.
|
Originally Posted by hustler
(Post 407339)
a tranny hooker just offered me her "clean" ass for $50 right when I walked out of my hotel.
What % is your mix of coolant to distilled water? Are you using Water Wetter or that Redline stuff yet? BTW - I prefer mechanical temperature gauges over electrical because of the fluctuations that can occur in electrical gauges.:2cents: Edit: Are you using a chin spoiler of any kind to help to create a stronger low pressure area behind the radiator? |
All times are GMT -4. The time now is 04:52 PM. |
© 2024 MH Sub I, LLC dba Internet Brands