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Old 10-08-2008, 09:26 AM
 
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question on best heads for money

Hello all,

Recently bought a street stock circle track car (dirt).

Handles fine but seems under powered on a tacky track.

Some of the guys have suggested getting better heads and thought I woud ask this forum for ideas or suggestions.

Turning around 6100 rpm

360 sbc
elgin 1080 cam
flat top pistons
stock 500cfm holley w/ edelbrock 2101 intake
heads have casting number 3947041

(cast iron only but other than that rules are open)...

Thanks

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Old 10-08-2008, 10:10 AM
 
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Correction, the cam is a Elgin 1090....not 1080

Should know better than to rely on memory
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Old 10-08-2008, 10:19 AM
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That's a really hairy cam. You could go well into the high 7000's with that cam if you had the right heads. If you have the option of swinging that fast, I suggest the biggest iron heads you can find, and then keep it humming. Don't let the RPMs drop below 5000 and watch the other guys disappear behind you.

Right now there is a huge mismatch with the heads and cam which racers often do to get around rules, or to maximize power with what they have. The cam is great for 4000-7000, and those 041 heads are good for idle to 5000. A set of Vortecs (062 or 906) and its required intake would help a lot for under a grand, and that should help you swing to about 6000. Dart Iron Eagles have room for porting and that should be a much better match for the cam, but you're looking at well over a grand for the heads and another grand or so for the porting.

Last edited by curtis73; 10-08-2008 at 10:35 AM.
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Old 10-08-2008, 03:27 PM
 
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Thanks a lot for the info
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Old 10-08-2008, 05:00 PM
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Yeah, I don't understand turnin' 6100 with a cam that will go 7500. Bolt on some Dart 200 Iron Eagles and let 'er buzz.
Here's the flow from the Stan Weiss site:
0.200" 129/114
0.300" 186/145
0.400" 229/164
0.500" 261/172
0.600" 252/174
If using 1 5/8" headers, change 'em out for 1 3/4". 750-800 cfm carb on Dart Iron Eagle Pro 1 intake. Dart head part#10310010PF bare casting, 49cc angle plug.

Last edited by techinspector1; 10-08-2008 at 05:34 PM.
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Old 10-08-2008, 05:47 PM
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Quote:
Originally Posted by techinspector1
Yeah, I don't understand turnin' 6100 with a cam that will go 7500. Bolt on some Dart 200 Iron Eagles and let 'er buzz.
Here's the flow from the Stan Weiss site:
0.200" 129/114
0.300" 186/145
0.400" 229/164
0.500" 261/172
0.600" 252/174
If using 1 5/8" headers, change 'em out for 1 3/4". 750-800 cfm carb on Dart Iron Eagle Pro 1 intake. Dart head part#10310010PF bare casting, 49cc angle plug.
I *think* his 500cfm is a 2bbl that is spec'd for a particular class or track. Could be wrong there.

I second the Iron Eagle heads.. Darn good. Or even the World Sportsman 2's.

.
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Old 10-08-2008, 06:11 PM
 
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U are right, rules don't allow more carb. Our Tech inspectors look for the 4412 stamp on the 500 holley ...

As far as the rpm's, just changed tracks and the track I am running now is quite a bit smaller.

Have a lower gear just haven't got it in yet.....probably next season.

Thanks again guys
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Old 10-11-2008, 06:09 AM
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Heads

Try a set of some old Pontiac heads.
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Old 10-11-2008, 07:01 AM
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Gear first, then power.your 041 heads aren't hurting ya the will flow more than your 4412 will supply.Handling is the key not engine.A 1 mph improvement in the corner will be 5 at the end of the straight. Also put all the compression in it the rules will allow on our 2bbl engine 15 to 1 is common this really only works out to the equivalent of 10 or 11 to one at speed due to the fact you can't fill the cylinders with the carb you have to use.An interesting thing about power and dirt tracks a buddy of mine blew up his 690 hp ford in his hobby stock and for giggles threw in a 350 out of an old truck with dished pistons 882 heads and mild hyd cam to finish out the last couple of races finished top 3 both times against 550 to 650 hp engines.car was within .1 of the times turned by the good engine.This dog probably couldn't make 300 hp on the bottle.The point is concentrate on handling and set up first it get you to the front then add more power.
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Old 11-02-2008, 12:12 PM
 
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Quote:
Originally Posted by barnym17
Gear first, then power.your 041 heads aren't hurting ya the will flow more than your 4412 will supply.Handling is the key not engine.A 1 mph improvement in the corner will be 5 at the end of the straight. Also put all the compression in it the rules will allow on our 2bbl engine 15 to 1 is common this really only works out to the equivalent of 10 or 11 to one at speed due to the fact you can't fill the cylinders with the carb you have to use.An interesting thing about power and dirt tracks a buddy of mine blew up his 690 hp ford in his hobby stock and for giggles threw in a 350 out of an old truck with dished pistons 882 heads and mild hyd cam to finish out the last couple of races finished top 3 both times against 550 to 650 hp engines.car was within .1 of the times turned by the good engine.This dog probably couldn't make 300 hp on the bottle.The point is concentrate on handling and set up first it get you to the front then add more power.
I think that Evan Marshall, editor of Muscle Mustangs and Fast Fords said it best about 10 years ago....

"People ask about more hp all the time when they should be concentrating on getting down the track."
He took a stock 225 hp 5.0 Stang and ran 12s with it and never touched the engine besides setting the timing.
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