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Author Topic:   Chevy 454 cooling
marty
Member
posted December 01, 2001 05:35 PM
Hi,i run a 454 on dirt/tar 1/3 mile ovals in the UK (take a look at www.f1stockcars.co.uk if you want to see what they are like).
The problem i am getting is overheating and was wondering if any of you guys had come across an idea an old engine builder told me to try.Because the engine is level in the chassis he tells me you can get a steam lock in the passages at the rear of the block and this causes the temp' to rise sharply.He told me that by running an external pipe from the rear of the block to the thermostat should cure most of my problems,have any of you heard of this being done and if it works how exactly would you go about doing it?
Thanks.


dirtracer14
Member
posted December 01, 2001 09:05 PM
How hot is it getting? My 454 in my truck runs at 200 to 220 all the time and thats just driving around. There is a possibility that the was a air bubble trapped but most of the time they will work there way out or heat up and blow the cap. Do you run a themastat? Has it ever run cool or does it allways run hot?


Gene
Member
posted December 01, 2001 10:06 PM
You gus run some extra heavy duty bumpers! I can only guess what the push trucks have! In answer to your question, Yes some builders do run external water lines to prevent steam pockets. I'm not a engine builder and would put lines on, only after getting info from someone that is. I assume you have a 454 chevy, they are used mostly in drag racing over here, perhaps you could check out a drag race site.


jracer
Member
posted December 02, 2001 12:43 PM
I run 454's in my circle track car. It runs alcohol for fuel and we have had to tape up the radiator fins the last couple of races to get some heat in the motor. E me directly and let's see what we can do to get you going.
jay
jracer98@att.net


marty
Member
posted December 03, 2001 09:05 AM
Thanks for your replies.A few more details that might help:we run only pump gas at 10:1 comp',large rad' with 24 psi cap and fan cowl,fixed 6 blade fan,50 50 anti freeze,no 'stat,engine mounted level in chassis,1:1 pulleys with stock standard rotation water pump.The temp' normally runs around 100 degrees c but on a warm/hot day this can suddenly rise to 160 degrees c towards the end of the race.Any suggestions would be welcome.Thanks.
Marty.


Racer14K
Member
posted December 03, 2001 03:20 PM
One thing I would diffently do would be to put in 160degF (71c) thermostat and drill 6 1/8" holes around the flange. I have found that this works better then the restricter washers. Something else that works real well is an airdam mounted on the bottom of the radiator ( made of plastic with it as wide and as tall as you can make it).

If there is an air pocket in the cooling system, have you tried jacking the front of the car up as high as you can get it. If not try this and let it run while watching to see if the coolent level drops.

phelps
Member
posted December 03, 2001 07:27 PM
Antifreeze dose not conduct heat as good as water. Try staight water with a corosion inhibitor additive


jracer
Member
posted December 03, 2001 10:17 PM
Use an aluminum high flow water pump like an Edelbrock Victor or Stewart. You can drill and tap the rear water passages on the intake manifold and run line from there to a Moroso(check their website) 63423 filler neck.It has tapped holes in the back that don't show in the picture. Is the top of the radiator below the intake manifold? If it is you need to raise it until the radiator cap is the highest point in the cooling system or plumb in an expansion tank(Moroso has them too) so that it is the highest point.
Check the timing(both initial and advance).
What is the octane of the fuel?
What are the jet and power valves sizes?
What is good to drink with fish and chips?
Jay in Dallas


marty
Member
posted December 04, 2001 07:46 PM
Thanks for the tips guys.To answer a couple of your questions;we run 97 ron unleaded gas,the rad cap is the highest point in the system,i run 37 degrees max' advance and i run it slightly rich to be on the safe side.I think i will try the extra cooling pipes for a start then if needs be i will go for a new water pump(or try riveting a thin disc to the rear of the impelor as a friend suggested,this is supposed to increase the flow i'm assured).Thanks again.
Marty.
quote:
Originally posted by jracer:
Use an aluminum high flow water pump like an Edelbrock Victor or Stewart. You can drill and tap the rear water passages on the intake manifold and run line from there to a Moroso(check their website) 63423 filler neck.It has tapped holes in the back that don't show in the picture. Is the top of the radiator below the intake manifold? If it is you need to raise it until the radiator cap is the highest point in the cooling system or plumb in an expansion tank(Moroso has them too) so that it is the highest point.
Check the timing(both initial and advance).
What is the octane of the fuel?
What are the jet and power valves sizes?
What is good to drink with fish and chips?
Jay in Dallas



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