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Topic: dewitts rad and fan combo.. whos got 'em?

in Forum: C3 Cooling and Heating Systems

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dewitts rad and fan combo.. whos got 'em? (1/21)
3/14/07 7:55pm

74stingray454
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Willow Grove, PA - USA

Vette(s):
1974 Stingray Coupe LS4 454 Dark Brown Metallic with Deluxe Saddle interior

Joined: 10/27/2006
Posts: 232

OK!!!!!!

I am fed up with the fan shroud and lack of any space and near impossible to install... .......

not to mention the factory copper / brass rad got a little banged up while remving the shroud a few months back.

Even though I had the local rad shop check it and they say its fine, i just dont trust it and since its cooling a big block, I just dont want to take a chance being 100 miles away and one of those bent tubes breaks and a overheat happens....

so... I was looking at the dewitts rad / fan combos...

Who has them, what temp change if any was noticed and is it worth the price?

74stingray4542007-03-14 16:57:25

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dewitts rad and fan combo.. whos got 'em? (2/21)
3/14/07 8:47pm

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Huntsville, AL - USA

Vette(s):
1971 convertible,375 HP 350ci,Muncie 4-speed,Edelbrock aluminum heads and RPM air-gap manifold,HEI distrubiter - old school mechanical tach drive. LOUD side exhaust!

Joined: 11/15/2003
Posts: 855

I don't have the electric fans, but I got a replacement radiator from them. It was expensive, but the quailty is second to none. It was also protected very well when shipped. I'd buy another one from them in a heartbeat.

dewitts rad and fan combo.. whos got 'em? (3/21)
3/14/07 9:37pm

74stingray454
Former Member
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Willow Grove, PA - USA

Vette(s):
1974 Stingray Coupe LS4 454 Dark Brown Metallic with Deluxe Saddle interior

Joined: 10/27/2006
Posts: 232

thats one happy customer

dewitts rad and fan combo.. whos got 'em? (4/21)
3/15/07 1:14am

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ANCHORAGE, AK - USA

Vette(s):
1965-327 coupe, 1968-small block coupe, 1969-427, 1971-454 coupe and currently a 1976-ZZ4 coupe reborn again,and hotter than ever.. Add a 1996 CE LT-4 for backup

Joined: 10/12/2004
Posts: 2193

I also have one from them, drop in replacement , I'm pleased..

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dewitts rad and fan combo.. whos got 'em? (5/21)
3/15/07 6:54am

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Lanoka Harbor, NJ - USA

Vette(s):
1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c

Joined: 12/21/2006
Posts: 828

i bought the fans and wound up buying a radiator too. that should be in by the end of the week. they have quick service and are great to deal with. i ordered the fans from mid america and they actually came from dewitts.

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dewitts rad and fan combo.. whos got 'em? (6/21)
3/15/07 6:59am

gurtz
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baton rouge, LA - USA

Vette(s):
1981 dark metallic blue, dark doeskin leather interior, mirrored glass T Tops, 330hp/350ci GMPP crate engine, billeted aluminum serpentine system, Dewitts with dual spalls

Joined: 8/12/2006
Posts: 391

I just put in the Dewitts Alum Rad with dual Spal fan set up. Much easier to get around than before. Paid about $950.00 for the set up and was fairly easy to install/wire.

Bummed recently while in traffic down here and weather was only 73 degrees with high humidity though, yet mechanical thermostat I installed showed 200 degrees. I did install a fail safe 195 degree thermostat and programmed the fan settings where Spal said to, so I am not convinced the thermostat is right, but will know more later this summer.

Last weekend, I drained the radiator, added Water Wetter and filled back with plain water and temp dropped about 10 degrees, left about a 10-20% antifreeze mix, so we will see.

However, to answer the other question, Dewitt and Spal are first class folks. You should be fine in PA though. LA is hotter than a *&^%%$#@!@~! with the humidity.

LOL, G

dewitts rad and fan combo.. whos got 'em? (7/21)
3/15/07 7:44am

knotacare
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Newark, DE - USA

Vette(s):
1968 Conv, 454HO,500HP-600TQ, TKO-600,3:70 HD rear,hotrod air, custom paint & suspension,1973 Ruby Red,T-top, 383 Stroker, TK)-500,frame off restro, 1967 Dodge Coronet, 340 stroker to 406, Dana 60

Joined: 7/26/2004
Posts: 463

I switched to a Dewitts 2 core aluminum radiator & a flex fan. Never goes above 185 with the air on in 90+ degree temp. I'm running a pretty high HP BB too.

Alan

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dewitts rad and fan combo.. whos got 'em? (8/21)
3/15/07 10:21am

74stingray454
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Willow Grove, PA - USA

Vette(s):
1974 Stingray Coupe LS4 454 Dark Brown Metallic with Deluxe Saddle interior

Joined: 10/27/2006
Posts: 232

Well, i bit the bullet, I ordered one this morning at 0800, by 0930 I had a shipiing notice from them with a tracking number!!!

So far, great service!

I am hoping with the Stewart Stage 1 Pump, Robertshaw Hi-flo 180 deg t-stat and this rad / fan setup with a coolant additive.....

I should not have to worry again about overheating!

dewitts rad and fan combo.. whos got 'em? (9/21)
3/16/07 1:23pm

VTHokie77Vette
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Pennsville, NJ - USA

Vette(s):
1977 EX-L48

Joined: 3/13/2002
Posts: 532

Great buy! You should be happy with the setup. I've been running it for about two years now without any problems.

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1977 Corvette EX-L48
383 Stroker, Holley MPFI, MSD Ignition, BTO 700R4, VBP Street/Slalom, Hooker Sidepipes with JCL Spiral Baffles, Corbeau A4s w/ Shark Bar and Simpson 5-Points, 17" AR TTII's, Kumho MX's

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dewitts rad and fan combo.. whos got 'em? (10/21)
3/16/07 7:35pm

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Lanoka Harbor, NJ - USA

Vette(s):
1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c

Joined: 12/21/2006
Posts: 828

radiator came in this afternoon. will be hooking up the fans and then installing probably during the week as i am doing some other thing on it . 74 you should be happy with it and hope it will go in easy.

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dewitts rad and fan combo.. whos got 'em? (11/21)
3/17/07 6:06pm

74stingray454
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Willow Grove, PA - USA

Vette(s):
1974 Stingray Coupe LS4 454 Dark Brown Metallic with Deluxe Saddle interior

Joined: 10/27/2006
Posts: 232

thanks for all the great input....

but.... what AMP alternator are you guys using if you're running the dual fans?

dewitts rad and fan combo.. whos got 'em? (12/21)
3/17/07 6:29pm

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Lanoka Harbor, NJ - USA

Vette(s):
1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c

Joined: 12/21/2006
Posts: 828

on my 75 the specs call for a 42 amp alt w/o a/c. with a/c--61 amp. when i got my vette it had a 55 amp on it which i replaced with a 75 amp. as my a/c is not presently connected technically i have enought to run fans but as i want to reconnect a/c at some point , i installed a 100 amp alt. if memory serves me right (sometimes it does work Rolling%20On%20The%20Floor%20Laughing

Rolling%20On%20The%20Floor%20Laughing

), the fans specs say they draw 35 amps. hope this helps.

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dewitts rad and fan combo.. whos got 'em? (13/21)
3/18/07 10:09am

74stingray454
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Willow Grove, PA - USA

Vette(s):
1974 Stingray Coupe LS4 454 Dark Brown Metallic with Deluxe Saddle interior

Joined: 10/27/2006
Posts: 232

So, its safe to say I could get away with running a 63 amp alternator seeing as my car does not have A/C or any other heavy draw items?

Does running a higher amp alternator require changing any wires to a heavier guage?

Thanks, Jim

dewitts rad and fan combo.. whos got 'em? (14/21)
3/18/07 10:27am

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Lanoka Harbor, NJ - USA

Vette(s):
1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c

Joined: 12/21/2006
Posts: 828

i would say you are pretty safe. as far as what i was told about wiring, it would be okay to put in higher alt as the regulator will control it plus you are not going to be under the constant draw all the time. as a matter of fact i decided for now to leave the 75 amp in until i get a/c working but will have the 100 amp for then.

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dewitts rad and fan combo.. whos got 'em? (15/21)
3/18/07 2:45pm

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Indianapolis, IN - USA

Vette(s):
Silver 1974 Convertible - L82 4 speed Low miles (was only 8,900 when I bought it in March 2006) - Now 54K miles. Original owner bought it as an investment for son's college expenses. 2008 Jetstream Blue Convertible

Joined: 9/3/2006
Posts: 2418

If you order from them, make sure you go with the "Black Beauty" (I think that's what they called it) option. They paint the radiator black and it looks more like a factory model. They say the way they do it, it does not effect cooling at all. I wish I had spent the extra $35. But other than that, I'm very happy with my DeWitts.

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dewitts rad and fan combo.. whos got 'em? (16/21)
3/18/07 5:54pm

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Lanoka Harbor, NJ - USA

Vette(s):
1975 metallic blue coupe with t-tops,L48, t/t steering, black leather interior. 1990 L98, white/red leather interior, auto,a/c

Joined: 12/21/2006
Posts: 828

i didn't get it with that option. as i am not going the route of making it totally original and i am adding a lot of chrome pieces to sort of dress it up the aluminium kind of fits in the picture. i feel like my brother does, who restored a 66 convertible (don't really want to sat the name here) mustang. he feels that he put in what he liked as he wants to drive the car and is not looking to see how much he can sell it for. it is a beauty. i am not going to make my vette a museum piece as i too want to drive and enjoy it and not just sitting around. that i'll do when if i ever have the good fortune of owning more than one corvette.

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dewitts rad and fan combo.. whos got 'em? (17/21)
3/18/07 6:42pm

gurtz
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baton rouge, LA - USA

Vette(s):
1981 dark metallic blue, dark doeskin leather interior, mirrored glass T Tops, 330hp/350ci GMPP crate engine, billeted aluminum serpentine system, Dewitts with dual spalls

Joined: 8/12/2006
Posts: 391

I put a 100 amp in mine and did not alter any wires

dewitts rad and fan combo.. whos got 'em? (18/21)
3/19/07 7:07am

knotacare
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Newark, DE - USA

Vette(s):
1968 Conv, 454HO,500HP-600TQ, TKO-600,3:70 HD rear,hotrod air, custom paint & suspension,1973 Ruby Red,T-top, 383 Stroker, TK)-500,frame off restro, 1967 Dodge Coronet, 340 stroker to 406, Dana 60

Joined: 7/26/2004
Posts: 463

The problem I had with the electric fans & air is at idle the voltage would drop with a 100 amp so I had a 160 amp built ..no more voltage drop. Also since I installed the TKO 600 my rpms tend to be much lower than with the 4sp. Also rewired the complete car.

Alan

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dewitts rad and fan combo.. whos got 'em? (19/21)
3/19/07 7:50pm

74stingray454
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Willow Grove, PA - USA

Vette(s):
1974 Stingray Coupe LS4 454 Dark Brown Metallic with Deluxe Saddle interior

Joined: 10/27/2006
Posts: 232

Rad and fans arrived today, very nice looking setup... and it looks kinda straight forward to wire-up

Ill be installing it this weekend...

dewitts rad and fan combo.. whos got 'em? (20/21)
3/22/07 9:54pm

74stingray454
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Willow Grove, PA - USA

Vette(s):
1974 Stingray Coupe LS4 454 Dark Brown Metallic with Deluxe Saddle interior

Joined: 10/27/2006
Posts: 232

Rad istalled.... will wire fans tomorrow night after work, we should be firing the car up on sunday...

I wonder if the car will enjoy all the new goodies...

New Cam and lifters

double roller timing chain and gears

stage 1 Stewart water pump w/ hi flow t-stat

HEI ignition with new wires and AC Rapidfire plugs

the dewitts rad setup

new valve springs and seals

rebuilt steering pump and power cylinder

dewitts rad and fan combo.. whos got 'em? (21/21)
3/23/07 12:09am

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Huntsville, AL - USA

Vette(s):
1971 convertible,375 HP 350ci,Muncie 4-speed,Edelbrock aluminum heads and RPM air-gap manifold,HEI distrubiter - old school mechanical tach drive. LOUD side exhaust!

Joined: 11/15/2003
Posts: 855

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