1994 ZR1 Radiator Replacement - ZR-1 Net Registry Forums

pzcg7l · 11-29-2022

Recently got the word that my 28 year radiator needs to be replaced. It's no longer flowing fluid like it should (and has a very small leak).

What's the consensus on a good way to go for judging? I've procured the stock replacement from Corvette Central (I'm sure the other usual suspects carry the same model), but it's got an extra unit inside the one plastic end tank for automatic base cars, i presume. The version pulled out of my car doesn't have this. Does anyone have experience running this type of replacement part? Does it negatively affect flow at all? I know cooling is always a hot topic (intentional pun) here so wanted to get the group's thoughts on this one.

Any other input on a good way to go that won't impact judging too much?

Thanks in advance.

Mystic ZR-1 · 11-29-2022

Get an aluminum radiator!

Solves overheating problems forever!
Bite the bullet on the point deduction...
The point deduction by itself probably won't
knock you out for a Top Flight?

pzcg7l · 11-30-2022

Yeah, I've considered that, but want to go as stock as possible for now. Looks like 14 originality points for the Rad.

I'm guessing the current replacement is fine, but just wanted to see if anyone had a direct feedback on it in a ZR1 before I pull the trigger.

Norwegianmopar · 11-30-2022

We bought a Dewitts Pro Series (two row) radiator for our 94 and it only needed some small trimming of the fan shroud. My buddy went to Dewitts in Michigan and got a tour around their facilities when he picked it up. Great quality and ditto customer service.20220518_130603.jpg

Sent from my SM-G955F using ZR-1 Net Registry mobile app

GOLDCYLON · 12-01-2022

I have Dewitt's in both my Z's look no further.

11-29-2022	#1
pzcg7l Join Date: Apr 2022 Location: Clarkston, MI Posts: 7	1994 ZR1 Radiator Replacement Recently got the word that my 28 year radiator needs to be replaced. It's no longer flowing fluid like it should (and has a very small leak). What's the consensus on a good way to go for judging? I've procured the stock replacement from Corvette Central (I'm sure the other usual suspects carry the same model), but it's got an extra unit inside the one plastic end tank for automatic base cars, i presume. The version pulled out of my car doesn't have this. Does anyone have experience running this type of replacement part? Does it negatively affect flow at all? I know cooling is always a hot topic (intentional pun) here so wanted to get the group's thoughts on this one. Any other input on a good way to go that won't impact judging too much? Thanks in advance.

11-29-2022	#2
Mystic ZR-1 Join Date: Jan 2010 Location: Mystic CT Posts: 2,589	Re: 1994 ZR1 Radiator Replacement Get an aluminum radiator! Solves overheating problems forever! Bite the bullet on the point deduction... The point deduction by itself probably won't knock you out for a Top Flight?

11-30-2022	#3
pzcg7l Join Date: Apr 2022 Location: Clarkston, MI Posts: 7	Re: 1994 ZR1 Radiator Replacement Yeah, I've considered that, but want to go as stock as possible for now. Looks like 14 originality points for the Rad. I'm guessing the current replacement is fine, but just wanted to see if anyone had a direct feedback on it in a ZR1 before I pull the trigger.

11-30-2022	#4
Norwegianmopar Join Date: Mar 2018 Location: Norway Posts: 342	Re: 1994 ZR1 Radiator Replacement We bought a Dewitts Pro Series (two row) radiator for our 94 and it only needed some small trimming of the fan shroud. My buddy went to Dewitts in Michigan and got a tour around their facilities when he picked it up. Great quality and ditto customer service.20220518_130603.jpg Sent from my SM-G955F using ZR-1 Net Registry mobile app __________________ Roy Martin 1994 ZR-1 #112 Admiral Blue/Black Dana 4:10 Aluminum flywheel Corsa exhaust Watson headers Haibeck chip 470 HP/399 RWHP 1991 ZR-1 #400 White/Red (SOLD) Dana 4:10 Powder coated engine Haibeck performance chip Borla exhaust

12-01-2022	#5
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,152	Re: 1994 ZR1 Radiator Replacement I have Dewitt's in both my Z's look no further. __________________ 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