Keeping 500+ HP Big Block Cool
Thread Starter
Melting Slicks
Joined: Jun 2001
Posts: 2,257
Likes: 545
Keeping 500+ HP Big Block Cool
Just looking for proven combinations with electric fan or fans if need be. Using a moroso electric WP And stock radiator. Just don't want to do it twice. Thanks Ron B.
Le Mans Master
Joined: Mar 2001
Posts: 6,229
Likes: 1,007
From: Watkinsville, GA and Glen Cove, NY
Ron, Griffin large tube aluminum radiator and dual Spal fans from Tom Dewitt. My 625 horse 502 never sees 200. In fact it needs to be pretty hot for the fans to even come on. When they do these things will rip up asphalt. Tom is a terrific guy to deal with as well.
Instructor
Joined: Oct 2004
Posts: 132
Likes: 0
From: NC
Ive got the gM 502/502. And Im running the original 427 rad (non aluminum), and with the original water pump, never got hot. Recently I changed out the water pump with a aluminum one
Key is have the rad cored and cleaned.
NO issue with the OEM rad
Key is have the rad cored and cleaned.
NO issue with the OEM rad
Safety Car
Joined: Oct 2000
Posts: 4,282
Likes: 172
From: Lake Wylie, South Carolina
Originally Posted by 69ttop502
Ron, Griffin large tube aluminum radiator and dual Spal fans from Tom Dewitt. My 625 horse 502 never sees 200. In fact it needs to be pretty hot for the fans to even come on. When they do these things will rip up asphalt. Tom is a terrific guy to deal with as well.
I will be contacting Tom this fall for mine.
Le Mans Master
Joined: Apr 2000
Posts: 7,562
Likes: 9
From: B'Ville NY
Cruise-In III Veteran
St. Jude Donor '05
Race Director
Joined: Feb 1999
Posts: 16,978
Likes: 7
From: In Dreams There Is Truth Ohio
Originally Posted by MELVINJ
Ive got the gM 502/502. And Im running the original 427 rad (non aluminum), and with the original water pump, never got hot. Recently I changed out the water pump with a aluminum one
Key is have the rad cored and cleaned.
NO issue with the OEM rad
Key is have the rad cored and cleaned.
NO issue with the OEM rad
533 cubes, recored rad, dual Spals. Decided to install the Spals to gain a few horses, if not for that, I'd be using the stock 5 blade fan, plus now it's safer to work under the hood with the motor running.
Last edited by GDaina; Jun 23, 2005 at 12:42 PM.
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
I have the large tube griffin aluminum rad, twin electric fans and run the TRW water pump 30% overdriven and my most of the time I run without any fan turned on. I average around 185 or 190 all the time.
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Team Owner
Joined: Apr 1999
Posts: 21,953
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From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Altered front end cars like mine have special cooling problems. IMO the real problem with Spal fans is they don't cover the full radiator core.
So I wish that I had gone bigger blades and CFM.
The owners of wimpy motors are happy with Spal fans
So I wish that I had gone bigger blades and CFM.
The owners of wimpy motors are happy with Spal fans
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Originally Posted by gkull
Altered front end cars like mine have special cooling problems. IMO the real problem with Spal fans is they don't cover the full radiator core.
So I wish that I had gone bigger blades and CFM.
The owners of wimpy motors are happy with Spal fans
So I wish that I had gone bigger blades and CFM.
The owners of wimpy motors are happy with Spal fans
I could not get away with just 1 at times. When I really need a fan I need both of them to do the job.
Cruising
Joined: Jun 2005
Posts: 11
Likes: 0
with 600+ hp I run 4 major items I beleive are the key.
1. High volume water pump (edelbroc)
2. Huge core aluminum radiator (ron Davis)
3. Twin high volume fans (perma-cool)
4. Ceramic coated headers (very helpful)
just my 2¢
1. High volume water pump (edelbroc)
2. Huge core aluminum radiator (ron Davis)
3. Twin high volume fans (perma-cool)
4. Ceramic coated headers (very helpful)
just my 2¢
Team Owner
Joined: Feb 1999
Posts: 34,453
Likes: 665
From: Republic of Texas
I'm waiting for the new tranny to get her dynoed. According to Destop Dyno (take it for what it's worth) I'm making 565hp w/ the dual plane and low 600's w/ the dual plane. I have a Griffin aluminum rad, and one 16in Perma-coll fan and on the HWY I turn the fan off and I still run 180degrees. In bumper to bumper traffic w/ the fan on I have yet to see 205degrees. 
Pro
Joined: Mar 2004
Posts: 686
Likes: 0
From: Southeast
Originally Posted by MakoVai
with 600+ hp I run 4 major items I beleive are the key.
1. High volume water pump (edelbroc)
2. Huge core aluminum radiator (ron Davis)
3. Twin high volume fans (perma-cool)
4. Ceramic coated headers (very helpful)
just my 2¢
1. High volume water pump (edelbroc)
2. Huge core aluminum radiator (ron Davis)
3. Twin high volume fans (perma-cool)
4. Ceramic coated headers (very helpful)
just my 2¢
Race Director
Joined: Feb 1999
Posts: 16,978
Likes: 7
From: In Dreams There Is Truth Ohio
Originally Posted by gkull
Altered front end cars like mine have special cooling problems. IMO the real problem with Spal fans is they don't cover the full radiator core.]
Originally Posted by gkull
The owners of wimpy motors are happy with Spal fans
Race Director
Joined: Jan 2000
Posts: 13,012
Likes: 2,252
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
825 hp 540"...street driven all the time. Made the 2000+ mile round trip to Bowling Green from Houston the last two years...no cooling issues.
I'm using a stock radiator, a Weiand team G (only 'cause it looks cool- stock pump did fine), stock pulleys and a fixed 7 blade fan.
Good and simple and is reliable on the street.
Never runs hot.
JIM
I'm using a stock radiator, a Weiand team G (only 'cause it looks cool- stock pump did fine), stock pulleys and a fixed 7 blade fan.
Good and simple and is reliable on the street.
Never runs hot.
JIM
