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Author Topic:   Converting from alcahol to gas???
Wheels47
Dirt Maniac

Total posts: 127
posted August 11, 2002 12:51 PM
Maybe you guys(and gals) can put some insight on this Problem.

We are dealing right now with ford engines. #-290-302-312 bored and stroked-cammed- all pretty good internal parts. What we are doing is a friend runs A-mod and refreshes engines and sell them to us at a fair price and we convert them to 2 barrel carb and run in B-mod.

Question is what all should we be doing to get the most out of engines and also keeping them cool as possible. 2 out of 3 has gotten very hot on us and we have tried everything to get the heat down. A fellow racer has just done one this way and at just idle after 5-7 minutes car was running about 230 degress. checked timing and set to 36 degrees(it was at around 44 for some reason) and still runs very hot. gonna check water inlet for restrictions,jets in carb,timing agian and from there not sure.

has new water pump on it - one thing I have noticed is that he has the platic fan setting right on radiator about 1/2 inch away and I know this is surely a problem--just haven't figured how to move it away as the balancer has a huge bolt coming out of it and looks near impossible to move back without a lot of expense.. Need to make it run at a reasonable cost for now as his funds are low and he's new at this--

anyhelp much appreciated---wheels

Wheels47
Dirt Maniac

Total posts: 127
posted August 11, 2002 12:55 PM
First thing to learn is how to spell Alcohol!!! LOL

mwmod34
Dirt Full Roller

Total posts: 35
posted August 11, 2002 02:00 PM
If you are running wissota rules I wouldswitch to e85 it runns almost as cool as methanol i run 302 at 36 degrees timing and run 180-200 on the track 633-666 gears on 3/8 tun around 7200

Monster
Dirt Maniac

Total posts: 135
posted August 11, 2002 08:59 PM
Make sure you are turning the water pump the right way. Some of them are reverse rotation for serpentine drives.

Wheels47
Dirt Maniac

Total posts: 127
posted September 07, 2002 09:28 AM
Still having problems with this silly thing overheating. I figure the head gaskets will need changed but also was looking at the car and noticed that the crankshaft pulley was 4 1/2 inches and the water pump pulley was 6 inches. would it help to enlarge the crankshaft pulley?? I would think so as we can almost count the blades when it is idling.. water pump is turning the right way and is near new. He also has his fan setting about 1 inch from radiator with a shroud on it. No way to move the fan back or radiator foward do to way car is built. should we take shroud off??

Thanks for your input.. Wheels

Monster
Dirt Maniac

Total posts: 135
posted September 07, 2002 10:04 AM
Here's some more things to try: Your pulley reduction is 75%, I would think that is ok, but changing it is fairly easy and worth a try. You mentioned a plastic fan, I would chuck that and use a big old steel bladed version, like from a mid-sixties F-100(the more modern application has slipped my memory). Make sure the fan shroud only covers the front 1/3-1/2 of the fan blades. And all heater hose connections on water pump and intake must be individually plugged. If hoses are used to connect any of these points a situation can develop where very little water will flow thru block. And it could be blown head gaskets, backward gaskets, or a bad radiator. We had one radiator that looked and flushed perfectly, but just would not cool an engine. A wreck fixed that.

rico 08
Dirt Freak

Total posts: 372
posted September 07, 2002 10:05 AM
i'd leave the shroud you may be idling too low idle it up ro about 900-1000 also beware alcohol heads usually have the valves tighter bacause they run cooler and on gas with higher temps the valves will bind when hot a friend of mine pulled his hair out over this.

brownstone
Dirt Maniac

Total posts: 120
posted September 07, 2002 11:01 AM
You may want to look at some of the old smokey yunick books that discuss piping water from the block and heads and feeding to the water pump for extra cooling. If these instructions in his book are followed correctly I have to see one run hot depsite the application of brand. With his setup you can run gas or alky no problem.

Best of of look I believe the info is in the power secrets book that smokey wrote.

Stans2411
Dirt Roller

Total posts: 12
posted September 07, 2002 05:26 PM
Wheels, You mentioned in another post that you were taking water from the back of the intake to the inlet. Are you talking about the thermostat housing? If so this is most likely your problem because this short circuits the water flow through the head.
I run a very similar Ford setup in a 2350lb UMP mod no shroud on gas with 12.7 comp. and seldom ever get over 200. Your pulley reduction should be ok, if anything I would be tempted to slow it down a little. I like mine 55 to 60%. Good luck! Check your private mail I sent you another response their.

Wheels47
Dirt Maniac

Total posts: 127
posted September 08, 2002 09:04 PM
As I stated this is a friends car and through a litlle tinkering and jetting the carb and tuning he has got it down to around 220 degrees. I would like to see it cooler and will keep trying to get him to do other changes and not be satisfied with the 220. he is starting to get the feel of his car and doing much better driving so maybe we will get a better view of what it's doing now. He's only run about five races so he's not really tested it to it's extreme!! thanks for the in put guys. Always good to get more ideas to check out. thanks much Wheels

Wheels47
Dirt Maniac

Total posts: 127
posted September 08, 2002 09:06 PM
Oh yes he went to a steel fan and seemed to help out also. Wheels

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