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Author Topic:   gas on mod heating problems help please
MONEY21
Dirt Full Roller

Total posts: 62
posted July 05, 2005 06:44 AM  
ive switched from alky to gas lately and cant get the motor to run cool here is afew things i have tried since switching,new afco radiator,new 4 blade fan,new schourd,and stillit runs hot. ANYONE HAVE ANY IDEALS IM LOST,THANKS IN ADVANCE

vosevichs
Dirt Forum Racer

Total posts: 78
posted July 05, 2005 09:03 AM  
Running lean. Too much timing. Blown head gasket.

brownstone
Dirt Freak

Total posts: 284
posted July 05, 2005 10:26 AM  
Dont know if you have done this already but here it goes, you need 1 to 1 ratio pulleys, and a bottle of wetter water will help also.

[This message has been edited by brownstone (edited July 05, 2005).]

Racer111
Dirt Freak

Total posts: 259
posted July 05, 2005 10:27 AM  
You will need all of these.Double pass rad PRC makes real nice ones cheap-4 blade steel fan--1 to 1 pullys--fan 3/4 inch from rad-32 degrees timing-maybe a schroud cant hurt.If you can run water lines off of therm housing in back of heads also into side of block off of water pump will help.

wfoondirt
Dirt Forum Champ
Total posts: 505
posted July 05, 2005 11:48 AM  
How hot? How long does it take to get hot? Pressure tested? What plugs? Carburator working/jetted properly? What water pump?

A good quality gas such as vp's l/m+ makes a big difference in cooling also.

You should be able to run 36* of timing no problem.




MONEY21
Dirt Full Roller

Total posts: 62
posted July 05, 2005 12:05 PM  
thanks for replys,fuel is actually rich,timing is at 36,no blown head gasket,i do not have 1to1 pullys,water wetter didnt help,new afco rad&schroud 1inch from radiator,running 210 in 20 lap race, takes about 12 laps,running autolite 23plugs,turbo blue 112 for fuel,hope this will help,thanks

David Blue 22
Dirt Roller

Total posts: 6
posted July 05, 2005 12:13 PM  
I use a fan shroud with duct tape to seal up small openings. A 18" steel fan & 15% reduction pulleys. A stewart stage 2 water pump. The coolant lines from the rear of the manifold to thermostat housing. Distilled water with prestone supplement. Run about 200 degrees on the track.

wfoondirt
Dirt Forum Champ
Total posts: 505
posted July 05, 2005 01:30 PM  
quote:
Originally posted by MONEY21:
,running 210 in 20 lap race,

210 is not hot.


leapinlizard
Dirt Freak

Total posts: 402
posted July 05, 2005 01:38 PM  
You can worry at 230.

MONEY21
Dirt Full Roller

Total posts: 62
posted July 05, 2005 03:22 PM  
your right 210 is not hot enough to hurt but every one i know says they run around 175 to 180 , iwould rather run in that range to have a comfort zone, how munch would 1to1 pullys help, thanks

hamer36
Dirt Maniac

Total posts: 196
posted July 05, 2005 03:39 PM  
If water pump isn't new, take off the back cover and check that the impeller hasn't moved. It should be real close to the housing, but I don't remember how many thousands is too much.

hamer36
Dirt Maniac

Total posts: 196
posted July 05, 2005 03:41 PM  
Also use a 5/8" restrictor in place of the thermostat.

Racer111
Dirt Freak

Total posts: 259
posted July 05, 2005 04:39 PM  
Good carb is a big key also.Stealth makes the best ones.Run Sunoco or VP turbo blue not much of a gas.

nyimcamod8t
Dirt Full Roller

Total posts: 67
posted July 05, 2005 06:32 PM  
i had an overheating problem earlier this year.I ended up putting a new aluminum water pump on and changed the pulley reduction from 30% to 15%.Car now runs 200 on a hot humid night and around 185 on a normal 70 degree night.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted July 05, 2005 07:44 PM  
Take off the AFCO fan and get a GM#405442. Best fan out there for cooling. Also you need a good water pump, Edelbrock or stewart works good along with 1:1 pulleys. With a good high flow pump and 1:1 pulleys you dont need or want a restrictor, you want to keep the high pressure water flowing through the block.

Another very important thing, make sure you wash the radiator out good after every night. Somtimes you may have to blow it out between heats and features. We spend a good 20 minutes ea week with garden hose spraying back and forth to work the dirt out of the radiator. Then about every 4 weeks or so take it out and put it in your kids pool and let it soak and see how much dirt comes out then.

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