Stock 302 Heads
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Stock 302 Heads
Hey, I've got a 1980 F150 with a 302 which is possibly from the late 70's. The heads have pressed-in rocker studs. I was wondering how many cc's the chambers are on a head from this era. I have som E6SE heads available to put on my truck and planned on pocket porting them, but didn't want to put the time and money into them if they wouldn't much over the heads on there now. The E6SE heads have been milled (I don't know how much) and have pedestal-style rockers. I know these heads have around 62.9-65.9cc chambers and could be smaller due to the milling. They may need to be nueralized (not sure on spelling there 
but that's not a big deal to me. Let me know what you think.
Erik
but that's not a big deal to me. Let me know what you think.Erik
Last edited by Sgt_Pepper17; May 15, 2005 at 08:29 PM.
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I have a set of D80E-BA heads and they are round 76.90 cc's wich is the late 70's 351W at a compression ratio of 7.74. 302's are around 67.50 cc's at a compression ratio of 8.96 from what I have found out., the late D80E heads have a smaller runner size, large cc chambers and dont flow to well stock, The E6SE from what I find are 62.00 cc's compression ratio 9.50 ,, probably the better of what you have, considering that they are the start of the era of the HO motor standards and probably will flow better stock than the D8's, if that is what is on the 302 you mentioned. the only way to know what is on the 302 is pull 1 of them and get the casting #, that will be a sure fire way of knowing other than guessing at it cus someone could have put other castings on it.
Last edited by luvinfords; May 15, 2005 at 09:12 PM.
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K well I just talked to a buddy of mine and he says that my engine is prolly older than I thought. Since the heads have push-in rocker studs he thinks it's pre '77. That may change things, I don't know. But if what your saying is right, I could be gaining a considerable amount of power for cheap. Thanks.
Erik
Erik
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From: Georgetown, De
i have a '77 302 2v motor and i was wondering what cc the heads were. Will the 302 benefit any power gains and compression if i put 58cc heads on it? what would my compression ratio be around? all i know is that 122-137hp factory is not good and not what i'm looking for. if i go for a pre 70 302 factory cam and get a brand new timing chain set aligned so the timing isn't retarded, will that help out the power #s any too?
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I'm not 100% sure on the cc of the 77 heads, however, I would venture at a guess and say prolly in the 67-69cc. From what I've seen, that feels right. You would find a power increase by swapping out the old heads and putin on the 58cc heads, but make sure the heads flow just as much air. Also, why put a factory cam in it when you could get a slightly bigger cam for under 100 bucks? I have a 204/214 .448/.472 (@.050) cam from PAW supply. It's more or less the Edelbrock performer cam. Desktop Dyno estemated it to be around 310ft/lbs with about 250 horse with dished pistons and low compression heads. It should go up a bit when I put the E7 heads I got from a guy for 25 bucks. They should raise the compression ratio to 9:1 with thier 60cc combustion chambers and will flow a lot better than my heads.
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From: Maple Valley, WA
The 77 heads are the D8OE casting which has 69cc chambers, these heads had the pedistal type rockers. Any 302 head before the D8 casting, aside from the C8AE casting (which was 63cc) are in the 58-60cc range and have rail type rockers with press in studs. The heads to look for are the 68 302 4v heads (C8OE-F), they had 53cc combustion chambers, or the 351w C90E/D0OE heads which have 60cc chambers, 1.84/1.54 valve sizes (As opposed to the 1.78/1.45 302 D0OE casting) and Huge intake runners in terms of SBF heads. later than the D80E head, In my opinion the only head worth the money is the E7TE head. They are a dime a dozen at the junk yard and are good solid heads for a good engine, the others will just choke your engine to death.
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From: south louisiana
Originally Posted by RacinNdrummin
The 77 heads are the D8OE casting which has 69cc chambers, these heads had the pedistal type rockers. Any 302 head before the D8 casting, aside from the C8AE casting (which was 63cc) are in the 58-60cc range and have rail type rockers with press in studs. The heads to look for are the 68 302 4v heads (C8OE-F), they had 53cc combustion chambers, or the 351w C90E/D0OE heads which have 60cc chambers, 1.84/1.54 valve sizes (As opposed to the 1.78/1.45 302 D0OE casting) and Huge intake runners in terms of SBF heads. later than the D80E head, In my opinion the only head worth the money is the E7TE head. They are a dime a dozen at the junk yard and are good solid heads for a good engine, the others will just choke your engine to death.
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From: Maple Valley, WA
Originally Posted by baddad457
The earlier C6OE 289 heads are identical to the 68 "J" code 302 4 bbl head and are much easier to find, cheaper too.
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From: south louisiana
Originally Posted by RacinNdrummin
No, the C6OE 289 heads had 54.5cc chambers and 1.67/1.45 valves.
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From: Maple Valley, WA
I did not get my info from some interchange book. I have rebuilt lots 289 heads and None of them had 1.78 intake valves. The only 289 heads that came with the 1.78 intake valves were the HP289's, thats a fact. Until I run across I set of stock 289 heads with 1.78 valves, I see no reason to believe otherwise.
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Originally Posted by RacinNdrummin
I did not get my info from some interchange book. I have rebuilt lots 289 heads and None of them had 1.78 intake valves. The only 289 heads that came with the 1.78 intake valves were the HP289's, thats a fact. Until I run across I set of stock 289 heads with 1.78 valves, I see no reason to believe otherwise.
uuhhh, sorry, most of the 289 heads had the 1.78 intake valves. I ported enough of them in a hi-po shop for years to be pretty certain on this one.