C3 hot
Thread Starter
7th Gear
Joined: Apr 2013
Posts: 7
Likes: 0
C3 hot
I have a gen IV 454 bbc bord .060 over sealed power 10:25:1 pistons 427 crank shaft all mechined & balanced timing @ 10 degrees btc stage 3 cam intake cam lift .302 exh .302 high powered aluminum water pump offenhowser intake champion big block aluminum radiator will cool to 700 hp sealed power fel-pro gaskets kit part #260-1009 pro comp aluminum heads part#PC3021 at a idel 30 min 215 degrees driving 10 min 220 degrees i have coolent 50\50 1 gal mix 2 parts pure fide water & water wetter 7 blade fan high pro clutch what am i doing wronge help me please thank you in advance 
Dwayne Mcmillin e-mail dmcmillinn@aol.com
Dwayne Mcmillin e-mail dmcmillinn@aol.com
Last edited by Dwayne Mcmillin; Apr 9, 2013 at 11:03 PM.
Thread Starter
7th Gear
Joined: Apr 2013
Posts: 7
Likes: 0
10 degrees btc I've tryed 4 tipes of thermostats & no thermostat 2 brass radiators & new alnminum bbc radiator cools up to 700 hp & sealed all around it took the tag plate off in front & sent up a prayer
Thread Starter
7th Gear
Joined: Apr 2013
Posts: 7
Likes: 0
yes i have a full shroud cam lift int..302 exh..302 valv lift int..513 exh. 513 lobe ctr int.105 exh.114 lash hot hyd int. & exh. sae duration 309 int. 309 exh. .050 duration 230 int. 230 exh. sae timing btc 42, abc 87,bbc 82, atc 47 .050 timing btc 9, abc 41, bbc 49, atc 1, carburetor 600 Edelbrock Performer 1405 ignition curve vac advance open all the way hooked to manifold port for full vac at idle & is working
Last edited by Dwayne Mcmillin; Apr 10, 2013 at 02:52 AM.
Pro
Joined: Jul 2010
Posts: 691
Likes: 25
From: Boynton Beach Florida
What year is your car? this won't cure your heating which in theory really isn't too hot but I understand doesn't sit well with you but 600 cfm carb on a big block is too small. I would use a 750 and if your happy with the Edelbrock then stick with that brand. I tried their 750 (#1407) on mine for a weekend but it didn't agree with my setup so back in the box it went on the shelf where it sits today.
If your still running in the 200's at cruising speed I would look at the front end of the car and for the air dam/deflector that sits under the radiator, that makes a huge difference at directing air flow up and into the radiator at driving speeds.
Getting hot in traffic and at idle is the same problem I have with a small block and I've tried everything you listed and still haven't found the magic setup so I'll be interested in seeing what you come up with.
Good Luck,
Eric
.
If your still running in the 200's at cruising speed I would look at the front end of the car and for the air dam/deflector that sits under the radiator, that makes a huge difference at directing air flow up and into the radiator at driving speeds.
Getting hot in traffic and at idle is the same problem I have with a small block and I've tried everything you listed and still haven't found the magic setup so I'll be interested in seeing what you come up with.
Good Luck,
Eric
.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
Race Director
Joined: Dec 1999
Posts: 11,094
Likes: 990
From: Sierra Foothills CA
I agree with PBV76 on the carb. First of all, your big block will run noticeably stronger with a 750 or 850. More importantly, that 600 is almost certainly designed for a small block and would be jetted accordingly. That could, of course, be dangerously lean for a performance big block like yours.
I've had a good look at a Quick Fuel carb recently and I like what I see. Here's a link to their line- http://www.quickfueltechnology.com/. I'd talk to them and see what they recommend for your engine- if you call them, have your specs ready because their tech guys have sounded like they really know what they're doing the 2 times I've talked to them. Other good options would be the Holley or Barry Grant performance lines.
The other big question is- when you went from a small block to the big block engine, did you stay with the small block radiator and support or did you upgrade to big block parts. There's a difference in capacity between the two and that's for good reason.
I've had a good look at a Quick Fuel carb recently and I like what I see. Here's a link to their line- http://www.quickfueltechnology.com/. I'd talk to them and see what they recommend for your engine- if you call them, have your specs ready because their tech guys have sounded like they really know what they're doing the 2 times I've talked to them. Other good options would be the Holley or Barry Grant performance lines.
The other big question is- when you went from a small block to the big block engine, did you stay with the small block radiator and support or did you upgrade to big block parts. There's a difference in capacity between the two and that's for good reason.
Drifting
Joined: Jul 2009
Posts: 1,532
Likes: 14
From: Dallas-Fort Worth TX
Dwayne, I got a hi perf BB. I have the initial timing set at 19 degrees with around 35 total. I use my vac advance connected to manifold vac. This will reduce your temp. I have a Dewitts Rad and Spal Fan set up. Stays right at 180*. I cannot speak for any other aftermarket rads.
Drifting
Joined: Jan 2011
Posts: 1,853
Likes: 81
From: Hamilton Virginia
Carb is too small for that engine and it might be effecting your temp.
What temp are you using for the thermostat ?
is the new radiator a 3 core or 4 core ?
Have you burped the cooling system completely yet ? I just put a new rad in mine and it took a little while to get all the air out.
If you continue to drive does the temp continue to go up past 220 ?
As your idling does it go past 215 ?
What temp are you using for the thermostat ?
is the new radiator a 3 core or 4 core ?
Have you burped the cooling system completely yet ? I just put a new rad in mine and it took a little while to get all the air out.
If you continue to drive does the temp continue to go up past 220 ?
As your idling does it go past 215 ?
Thread Starter
7th Gear
Joined: Apr 2013
Posts: 7
Likes: 0
I shut it down at 215 it got all most to 220 it looks like it will go higher if i let it set the timing at 16 btc seems to stay at 211 now drags at start up but it starts ok I have a new champion radiator for a bbc corvette cools up to 700 hp but has ownly 3 core rows cools better then the big brass I'm looking at 4 core now idling at 211 now still afraid to drive it thermostat is 180 back to the drawing board thanks all
Thread Starter
7th Gear
Joined: Apr 2013
Posts: 7
Likes: 0
Rebelrob it's likes 19 btc stays at 210 under aload going to up grade the radiator to a aluminum 4 core row that should drop me a few more degrees in temp I'll be happy then thanks for all the help everone
Melting Slicks
Joined: Dec 2009
Posts: 3,223
Likes: 651
From: Thunder Bay
I have a gen IV 454 bbc bord .060 over sealed power 10:25:1 pistons 427 crank shaft all mechined & balanced timing @ 10 degrees btc stage 3 cam intake cam lift .302 exh .302 high powered aluminum water pump offenhowser intake champion big block aluminum radiator will cool to 700 hp sealed power fel-pro gaskets kit part #260-1009 pro comp aluminum heads part#PC3021 at a idel 30 min 215 degrees driving 10 min 220 degrees i have coolent 50\50 1 gal mix 2 parts pure fide water & water wetter 7 blade fan high pro clutch what am i doing wronge help me please thank you in advance Dwayne Mcmillin e-mail dmcmillinn@aol.com
Dwayne Mcmillin e-mail dmcmillinn@aol.com