781 heads best mods
08-05-2014 | 08:15 PM
#21
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Joined: Feb 2011
Posts: 2,640
Likes: 4
Honestly, a cylinder head set up like this benifet a greatly from higher compression (than stock) and a cam to compliment it. We have used 781 heads, with stock valve sizes and no porting and made 580+ hp with just 10.25:1 pistons and a generic Erson hydraulic flat tappet cam.
Would I put a fully reworked set of heads on a stone stock motor? Probably not worth the expense. Spending the money on pistons and a cam would net bigger results.
Would I put a fully reworked set of heads on a stone stock motor? Probably not worth the expense. Spending the money on pistons and a cam would net bigger results.
08-05-2014 | 08:27 PM
#22
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Joined: Nov 2004
Posts: 14,100
Likes: 3,687
From: On A Dirt Floor
Simple.
SPAM.
====================
You can run either or both...you just have to build for it and stay on top of it. Most biz's customers would not stay on top of it.
SPAM.
====================
You can run either or both...you just have to build for it and stay on top of it. Most biz's customers would not stay on top of it.
Last edited by SB; 08-05-2014 at 08:32 PM.
08-05-2014 | 08:28 PM
#23
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Joined: Jul 2014
Posts: 376
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From: Northern Indiana
I'm running 10.08:1 with iron heads, no issues.... Static compression isn't a good number to base any assumptions on as the cam, rods, and stroke dictate what your actual running (dynamic) compression is.
08-05-2014 | 11:30 PM
#24
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Joined: May 2011
Posts: 41
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From: North Branch/Pine City MN
As mentioned, people can wreck anything. This is the main reason we don't do retail work. Dealing with other businesses and engine shops eliminates this risk.
Last edited by rev.ronnie; 08-05-2014 at 11:32 PM.
