SPAL FANS and 2 ROW DEWITT'S TECH Notes - Page 2 - ZR-1 Net Registry Forums

RHanselman · 06-17-2013

Just wondering, how are your oil temps?

GOLDCYLON · 06-17-2013

Quote:

Originally Posted by RHanselman

Just wondering, how are your oil temps?

Never beyond mid point. Temps really climb with Ac on. Bought new 2 row with spal fans.

PhillipsLT5 · 06-17-2013

http://www.summitracing.com/search/b...ew=ProductName

http://www.summitracing.com/search/b...s?autoview=SKU

RHanselman · 06-17-2013

I have the same problem with my Turbo LT1 car. The A/C drives the temps up pretty darn good when I was in Vegas... I'm going to pull and inspect the Rad and was thinking of upgrading the fans. Where did you source the Spal Fans?

RHanselman · 06-17-2013

Quote:

Originally Posted by PhillipsLT5

http://www.summitracing.com/search/b...ew=ProductName

http://www.summitracing.com/search/b...s?autoview=SKU

You're quicker than I was...

tf95ZR1 · 06-18-2013

My OEM radiator plastic tank separated from the core, so I used that as an excuse to get a Ron Davis radiator.
(I consider the RD rad in the same category as a DeWitt's.) To cool better, it is thicker than stock so I had to trim
the fan shroud. BFD. Car runs cooler in general.
Assuming the basics: radiator is clean and not blocked, coolant is correct (water wetter?), thermostat works, etc.
there are some other options to run cooler:
-Have you tried cooler spark plugs? Consider them your summer plugs.
-A high rise hood. Not only more room for air flow, but more air can suck in from in front of the windshield.
Not to mention how COOL it looks!
-Down shift. Counter intuitive, but it works. You can thank the Z's cooling system design.
Obviously in stop and go traffic this is useless.
-manual fan switches

I've never understood how a 160deg thermostat will make the system run cooler than a 180deg stat.
Yes, it will open sooner, but eventually the system temperature will rise to it's open thermostat "equilibrium" temperature
(greater than 160) regardless, right?

GOLDCYLON · 06-18-2013

Quote:

Originally Posted by RHanselman

I have the same problem with my Turbo LT1 car. The A/C drives the temps up pretty darn good when I was in Vegas... I'm going to pull and inspect the Rad and was thinking of upgrading the fans. Where did you source the Spal Fans?

Dewitts sells then as well as a direct fit... Im $900 lighter although

http://www.dewitts.com/collections/c...minum-radiator

GOLDCYLON · 06-18-2013

Quote:

Originally Posted by tf95ZR1

-A high rise hood. Not only more room for air flow, but more air can suck in from in front of the windshield.
Not to mention how COOL it looks!

I agree

Quote:

Originally Posted by tf95ZR1

-Down shift. Counter intuitive, but it works. You can thank the Z's cooling system design. Obviously in stop and go traffic this is useless. -manual fan switches

Actually I got relief when I up shifted esp to 6th gear at freeway speeds in 5th the temp would slowly climb

Quote:

Originally Posted by tf95ZR1

I've never understood how a 160deg thermostat will make the system run cooler than a 180deg stat. Yes, it will open sooner, but eventually the system temperature will rise to it's open thermostat "equilibrium" temperature (greater than 160) regardless, right?

Your right as I understand it a specific temp of a thermostat allows the passage of rad water beyond a specific heat range. Its actually better to keep the water in the radiator as long as possible as thats air cooled before letting it go into the rest of the motor. So a 160 allows the water to start flowing sooner however all the cooling occurs in the radiator. Hopefully the increase in capacity and bigger fans will resolve my issue. D

GOLDCYLON · 06-24-2013

Holly Crap Dewitt's finally shipped the radiator a week after I ordered wow. Very slow IMHO.

tf95ZR1 · 06-24-2013

Hey be careful, GC.
Aren't they a supporting vendor here?
Don't want to be banned.....

Oh wait, you're a mod!

06-17-2013	#11
RHanselman Join Date: Jul 2005 Location: Cresson, TX Posts: 970	Re: Wtb Dewitt's radiator and spal fans Just wondering, how are your oil temps? __________________ Ron Hanselman Founding Member #80 CM Lifetime Member #1093 1991 #383 Twin Turbo 1993 #099 Ruby, Jeal 368 w/Snake Skinner body 1961 White with Red Int

06-17-2013	#13
PhillipsLT5 Join Date: Aug 2005 Location: Scottsdale, AZ Posts: 2,450	Re: Wtb Dewitt's radiator and spal fans http://www.summitracing.com/search/b...ew=ProductName http://www.summitracing.com/search/b...s?autoview=SKU

06-17-2013	#14
RHanselman Join Date: Jul 2005 Location: Cresson, TX Posts: 970	Re: Wtb Dewitt's radiator and spal fans I have the same problem with my Turbo LT1 car. The A/C drives the temps up pretty darn good when I was in Vegas... I'm going to pull and inspect the Rad and was thinking of upgrading the fans. Where did you source the Spal Fans? __________________ Ron Hanselman Founding Member #80 CM Lifetime Member #1093 1991 #383 Twin Turbo 1993 #099 Ruby, Jeal 368 w/Snake Skinner body 1961 White with Red Int

06-18-2013	#16
tf95ZR1 Join Date: Aug 2005 Location: Northridge, CA Posts: 1,449	Re: Wtb Dewitt's radiator and spal fans My OEM radiator plastic tank separated from the core, so I used that as an excuse to get a Ron Davis radiator. (I consider the RD rad in the same category as a DeWitt's.) To cool better, it is thicker than stock so I had to trim the fan shroud. BFD. Car runs cooler in general. Assuming the basics: radiator is clean and not blocked, coolant is correct (water wetter?), thermostat works, etc. there are some other options to run cooler: -Have you tried cooler spark plugs? Consider them your summer plugs. -A high rise hood. Not only more room for air flow, but more air can suck in from in front of the windshield. Not to mention how COOL it looks! -Down shift. Counter intuitive, but it works. You can thank the Z's cooling system design. Obviously in stop and go traffic this is useless. -manual fan switches I've never understood how a 160deg thermostat will make the system run cooler than a 180deg stat. Yes, it will open sooner, but eventually the system temperature will rise to it's open thermostat "equilibrium" temperature (greater than 160) regardless, right?

06-24-2013	#19
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,153	Re: Wtb Dewitt's radiator and spal fans Holly Crap Dewitt's finally shipped the radiator a week after I ordered wow. Very slow IMHO. __________________ GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V