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EAGLE HEADS ON A 6.1
#2405201
11/17/17 10:17 PM
11/17/17 10:17 PM
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Joined: Oct 2017
Posts: 80 Australia
aus370
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I haven't seen any results of Eagle heads on a stock stroke 6.1. I was hopeing some of the G3Hemi Masters here might have some insight .
I have a stock 6.1 in a Valiant , It has the Mahle drop-in forged pistons in it , unfortunately these drop the comp to around 10.0 ,combine that with a cam that I will eventually install , I think I'll be looseing alot of torque.
I have been Paying attention to some of the builds on here , and thats where the eagles come in , they should bring the comp up to 11.0 . So a little home porting and maybe some 1.6 exhuast valves What sort of HP increase ????. worth it or just stay with my 6.1 heads.
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Re: EAGLE HEADS ON A 6.1
[Re: aus370]
#2406654
11/21/17 03:36 AM
11/21/17 03:36 AM
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Joined: Sep 2004
Posts: 1,828 houston texas
gremlinsteve
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Well I think your comparable on flow enough that it won't achieve Much gain there if any Compression bump should pick you up about 3-4 percent
I think your better off purchasing the right camshaft for the 6.1 combo using the 6.1 head
I have a camshaft I designed years ago that's been know to Run rather well. And to be honest it's not that much as far as duration
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Re: EAGLE HEADS ON A 6.1
[Re: L4staero]
#2406655
11/21/17 03:37 AM
11/21/17 03:37 AM
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Joined: Sep 2004
Posts: 1,828 houston texas
gremlinsteve
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Id like to know this too.
What would be the best choice for a 6.1 bottom end out of 6.1, 5.7 eagle or 6.4 heads? Anyone with some experience in this?
TIA Can you rephrase your question so I can try to assist you better
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Re: EAGLE HEADS ON A 6.1
[Re: gremlinsteve]
#2406694
11/21/17 09:50 AM
11/21/17 09:50 AM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
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Id like to know this too.
What would be the best choice for a 6.1 bottom end out of 6.1, 5.7 eagle or 6.4 heads? Anyone with some experience in this?
TIA Can you rephrase your question so I can try to assist you better I think he's talking Bottom end, Torque , Rpm below say 3500
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Re: EAGLE HEADS ON A 6.1
[Re: gremlinsteve]
#2406695
11/21/17 09:52 AM
11/21/17 09:52 AM
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Joined: Oct 2017
Posts: 80 Australia
aus370
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So maybe around 15 HP for the compresssion increase , I see your point considering i don't have the eagles . Your cams are you able to do something with a little more lift to take advantage of the valve reliefs. Well I think your comparable on flow enough that it won't achieve Much gain there if any Compression bump should pick you up about 3-4 percent
I think your better off purchasing the right camshaft for the 6.1 combo using the 6.1 head
I have a camshaft I designed years ago that's been know to Run rather well. And to be honest it's not that much as far as duration
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Re: EAGLE HEADS ON A 6.1
[Re: aus370]
#2406708
11/21/17 10:41 AM
11/21/17 10:41 AM
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Joined: Sep 2004
Posts: 1,828 houston texas
gremlinsteve
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Of course If my memory serves me correctly your going to start seeing valvetrain Issues in the .650 range
What lifts are you asking for
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Re: EAGLE HEADS ON A 6.1
[Re: aus370]
#2407229
11/22/17 06:32 AM
11/22/17 06:32 AM
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Joined: Oct 2017
Posts: 80 Australia
aus370
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From memory , i didn't measure , the valve reliefs looked around .080" deep . Most of the cams i see that are intended for stock 6.1's have around .560 valve lift , I was thinking something around .600" .
Last edited by aus370; 11/22/17 07:07 AM.
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Re: EAGLE HEADS ON A 6.1
[Re: aus370]
#2407336
11/22/17 01:19 PM
11/22/17 01:19 PM
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Joined: Sep 2004
Posts: 1,828 houston texas
gremlinsteve
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I can grind u something in the .620 range with ease
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Re: EAGLE HEADS ON A 6.1
[Re: aus370]
#2407750
11/23/17 09:21 AM
11/23/17 09:21 AM
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Joined: Oct 2017
Posts: 80 Australia
aus370
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Now I'm spoilt for choice. What is the stock rocker ratio 1.6 , 1.65 , or somewhere inbetween.
Last edited by aus370; 11/23/17 09:22 AM.
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