DOVE compression

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Nov 9, 2005 | 09:01 PM

djtuna

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DOVE compression

does anyone know the ballpark compression ratio on a DOVE head with a stock '75 460 block?

Nov 10, 2005 | 08:58 AM

William

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From: Sun River St. George

The 75 cylinder heads should be D3's with 92 cc chambers. The standard pistons in your engine have a 22 cc dish and a CR of around 7.5 to 1. The D0VE heads should have a 72 cc chamber. Armed with this information my Ballpark estimate is around 9 to 1 CR or less. Someone will come along and correct this if I'm wrong. What are you doing? Just installing higher compression heads on a older engine may not achieve your goals.

Nov 13, 2005 | 06:51 PM

djtuna

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I am rebuilding a 75 460 to put into my truck, the engine has the D3 on it now, but I am looking for something with a little more performance to it. I want the engine to be a slight performance engine, but still a daily driver. Do you by chance know the Compression of the D2 heads???

Nov 13, 2005 | 08:01 PM

monsterbaby

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From: iowa

what D2 heads if your talking about the D2VE heads you are better off by far with the D3 heads. If your talking about the D2OE police intercepter heads thats another story but doubtfull that those are what your talking about.
DOVE heads on a factory 75 block will without decking should yeild somewhere slightly over 9:1 like 9.35 using the pistons down about .025 which would be about right usually.

Nov 14, 2005 | 06:13 AM

William

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From: Sun River St. George

djtuna; I am doing the same thing. Based on knowledge shared here I will use the D3 heads and boost compression just a tad by replacing the 22cc dished pistons with 15cc dished. KB 206 pistons come up a bit higher in the bore and that and the smaller dish should yeld about 9-1 CR. I am planning on a Comp Camshaft PN# 34-224-4. I will use their springs, keepers and timing chain. The camshaft timing will be set straight up. I will have the rods resized and add ARP rod bolts. After that its just the usual suspects, Clevite, Felpro, Edelbrock and a HEI distributor and stock exhaust manifolds. This is for a 66 F100 Short with a C6. Any other ideas are appreciated.

Nov 14, 2005 | 10:31 AM

djtuna1

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I think I will wind up using the D3 heads, I was hoping to get a flat piston, but the 15 cc ones sound acceptable. I am going to put an edlebrock performer rpm intake manifold with a holley truck avenger 770 carb. This will be a mud truck. I am also planning on using headers, and have yet to decide which cam to use. If any of this sounds a little bogus, please let me know, because I haven't checked into all of it yet. I just got the heads off the engine, and that is as far as I have got on the engine rebuild. I have plenty of time to change my ideas, any suggestions would help.

Nov 14, 2005 | 10:50 AM

William

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From: Sun River St. George

djtuna and djtuna1! Are you two different people? The trucks you describe are very different. Daily driver is one thing and a mud truck is something else. I think an engine with flat top pistons, a camshaft with bumps like the Comp cam FFX 4266H-11, reworked heads and headers would work well. I am not an expert here on this subject. I am only interested in a daily driver, shorter camshaft, reliability and maybe some decent fuel mileage on regular gas. The mudd truck will require premium fuel and maybe some additive. In either event I think the carburetor is too big.