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Old 12-10-2002, 06:19 PM
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ok... im confused as hell now

i got people telling me the 305 heads would suck
they don't flow enough, valves to small, to high compression, spark knock, so on and so on
these peeps tell me to get better heads, was told that the 327 double hump head are what im lookin for i find 041X

then i get told the 305 heads would work better than the 041X heads, i cannot use vorteks becouse i already have a intake

im abit lost here i keep hearing 2 diffrent storys
this is my first "my engine" ive built others but building would be a poor term for all i did was put it together.

where do i go from here?

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Old 12-10-2002, 06:41 PM
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The 305 heads will give you LOTs of torque. They don't flow good for a 6000 rpm race engine. Remember velocity produces torque. Think of a river. When a river is flowing through a wide smooth portion of terrain, its flowing slow and peaceful. When it gets to a rough part of terrain where it is squeezed into a much thinner river, then it starts to churn up and flow very fast. The same concept works for cylinder heads, the smaller ports of the 305 head will make more velocity of the air/fuel mixure at low rpms giving your exceptional torque. The bigger heads will give you higher flow values and more upper RPM horsepower but you will not have as good of torque as the 305s will produce. You will have an increase in compression too. If you use premium fuel and change the advance curve in your distributor as to not advance too quickly, you won't have a problem with knocking.

So, its up to you, torque vs. horsepower
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Old 12-10-2002, 06:45 PM
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The 041's are definately the way to go. The 305 heads would be good low end heads, but up top they would run out of air.

I think that the 041's would be good for your buildup, but not at $500. If you cant find anything cheaper and that is what you want to run get them. It kindof depends on what you want though. For a little more money you could bet new aftermarket heads, but If you get a set of aftermarket heads with bigger ports you could kill the lowend of the motor. The 041's should flow enough air for close to 400HP with the right cam, compression, intake and carb. Hope this doesnt muddy the water more.

Chris
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Old 12-10-2002, 06:54 PM
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only the old timers and people who hear stories about camelback heads would recommend them as they and the 041 heads are from the sixties, early seventies, they can't handle modern fuels and they are just plain worn out. i"ve been building performance engines for over 30 years and for my money the new vortec or the aftermarket heads are the way to go. if you have the old heads and they are in good shape use them. but if you go out and buy some used ones you are looking at $400.00 to make them usable, I get this all the time. the 305 heads will work on a stock or mild small engine, they will raise your compression which will make the engine more responsive, they don't breath above 5000 rpm they have small port windows and small intake valves to make the 305 cubes responsive in everyday street driving.

[ December 10, 2002: Message edited by: BOBCRMAN@aol.com ]</p>
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Old 12-10-2002, 07:13 PM
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the 041X are $500 becouse im haveing the valve seats done and slightly stiffer springs, im sure the charge for the heads osn't $500 in themselfs its for the whole job

i thought HP was what we all go for when going proformance? i though torque came with HP

in your opnions what would you stick with, ive posted my engine stats resently

"what would you do?"
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Old 12-10-2002, 08:00 PM
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would anyone have the specs for both these heads? i don't have any cast number off the heads unless the 106 number is it
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Old 12-10-2002, 08:11 PM
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Here is how I answered another post that is just about what you are doing.

<a href="http://www.hotrodders.com/cgibin/ubb/15/002795" target="_blank">http://www.hotrodders.com/cgibin/ubb/15/002795</a>

I don't like a street motor to go over about 9-1 compression unless it has a cam with over 230* duration. A short cam and high compression ratio makes too much cylinder pressure for the street. If you use the 4% rule, a 400hp motor will loose 16hp by dropping the compression from 10-1 to 9-1. That 4% is pretty close as far as guessing goes. The 9-1 ratio will also eliminate the "High test, add booster, back the timing up, and it still knocks blues". A 305 head with a flat top can get you a bit over 10-1. A 64cc head, 9-1 or so.

In my book, ANY head is better than a 305 casting for performance use. Depending on what has been done, I don't think $500 is too far off on a pair of 041's. Dan
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Old 12-11-2002, 06:09 AM
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can you gasket match and pocket port 305 heads or are they unable to do so if you could wouldnt they flow over 5000 r's bout 5 months ago i built my second engine the same old sbc recon rods cast crank and flat tops i needed heads so i looked in the paper 462 ported polished drilled for bigger pushrods screwin studs and guide plates 194 160 valves $200 they are the same as the 041 but the 041 are rarer
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Old 12-11-2002, 06:55 AM
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[quote]Originally posted by Camaro76:
<strong>i thought HP was what we all go for when going proformance? i though torque came with HP


"what would you do?"</strong><hr></blockquote>

This is a common misconception. HP is calculated from a set amount of torque at a set RPM. You are always making torque, it is just the RPM that you make that torque that is in question. High torque at High RPM makes High Horse Power.

Chris
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Old 12-11-2002, 07:08 AM
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Mustang66 Thats a good anology. I have a 305 to rebuild and I have the heads. I was thinking about shucking out the cash for Vortec heads and intake. low end torque is what I want. Mabe Ill look in to getting those 305 heads rebuilt. I dont plan on the rpm's to hardly ever see 5,000 RPS.
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