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Author Topic:   58cc heads
posted May 31, 2003 07:52 PM
Anybody ever use the 58cc heads made by chevy? and does anyone have any thoughts on 58cc heads? casting number 14014416.Thanks

posted June 01, 2003 03:58 AM
They are from a 305.

I have some stock flow numbers on them somewhere if you are interested.

posted June 01, 2003 09:26 AM
if you could find those flow numbers that would be great. Thanks!

posted June 01, 2003 11:59 AM
they are good for crompession but need alot of work to be good heads they have realy small valves in um

posted June 01, 2003 03:26 PM
1.84-1.5 valves

1.94 will fit but are shrouded by the chamber.


posted June 01, 2003 09:38 PM
These heads with a 194 and 160 and a good port job work well on a 1/4 mile track I think the compression over flow works out ok on that short a track but on a 3/8s or larger you better go with the flow...Towman

posted June 02, 2003 01:06 AM
Here ya go, Stock 416s with 1.84 & 1.50 valves:

Lift= .100/ .200/ .300/ .400/ .500/ .600
In. = 53/ 108/ 152/ 177/ 183/ 186
Ex. = 46/ 87/ 124/ 139/ 142/ 144

I had 3 different 305 heads flowed & the 416 were the best of the bunch.

the others were the 601s & 187s

How much lift are you going to use?
& is this for a 350?

hope that helps some,

Gene S.

posted June 02, 2003 06:27 PM
Ruggs66-Thanks for them numbers and yes, im thinking about putting these on a 350.

66jj- are you saying i can run the 1.94 valves with no modifications but they will get ruined?

i have basically have no knowledge when it come to engines!lol

posted June 02, 2003 10:46 PM
66jj is talking about how close the valve will be next to the chamber of the head & that will restrict some flow thats all, it will not ruin the valve.

The 416 head has more room next to the chamber wall than the 601 head does tho, so it might not be that bad.

I can not run the 1.94 valves in our head so I never tried a flow test on them with the 1.94s

A machine shop can put in the 1.94 valves for you, as you will not be able to just switch them over by yourself.

how much lift does your cam have?

posted June 02, 2003 11:46 PM
here is a link so you can compare flow numbers with other heads:

posted June 03, 2003 02:37 PM
Ruggs- Thanks for that web site. is it better to go with the bigger valves and a little less flow? or the smaller valve and a little more flow? if i use a 1.94 valve what should the other valve size be? i have not yet chosen a cam but it will probally between .500 & .600 lift! Thanks!

posted June 04, 2003 01:32 AM
you want the most flow at your max valve lift.

If you look at the other heads on that chart, it will show how much better some flow at .500 or more lift.

If you were only to use a cam with 420 lift it would not be necessary to have great flow at .500 lift.

I would put the 1.94 valves in the 416s if you are going to run a cam with .500 or more lift.

Lots of new valves on ebay at really good prices also.

Check out the 186 heads on that chart, they are not far off of the 416s for flow.
Those 186s are the ones with the small humps on the ends, they ran those on early '70s H.P. 350s.
With the install of the 1.94s in your 416s, I would bet they would be as good or better than the stock 186s.

It also depends on your rules, it would be hard to beat the Vortec heads if they are legal.

I might have to try some 1.94s in a 305 head & get them flowed just so I could give out an exact answer.

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