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Gen3 question 6.1
#1337273
11/18/12 05:48 PM
11/18/12 05:48 PM
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Joined: Dec 2004
Posts: 1,069
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Garry Owen
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super stock
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OP
super stock
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Posts: 1,069
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Looking for some recommendations on a cam. It's not going to be a track car, but I do want a healthy cam. Where I want to end up is a something that will kill on the street but still have some get up on the highway. I'm a cheap [Edited by Moparts - Family Friendly Site - Keep it clean] so I've layed out some end items to base the cam question and ptv clearance. End product will be an airhammer cai, heartthrob catback, tranzformer, 180 thermostat, udp, and 11.1 compression and a cam with tune. So there's the basic "what cam?" question but also what's the best route with bumping up the compression? Thinner gasket or milling the heads, and the ptv issues that might show up with said cam. Thanks in advance
I asked this on lxforums but wound up getting the basic vendor call me answer. I really want to know what issues I would run into with milling the heads or thinner gasket to increase compression. I don't want to notch the pistons, due to budget. Is this even possible and could there be a cam to run in it?
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Re: Gen3 question 6.1
[Re: MattW]
#1337275
11/18/12 06:06 PM
11/18/12 06:06 PM
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Joined: Feb 2011
Posts: 4,302
Nebraska
72Swinger
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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HHP offers some BES designed grinds in stage 1,2 and 2r.
Mopar to the bone!!!
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Re: Gen3 question 6.1
[Re: AlexP]
#1337283
11/20/12 05:51 PM
11/20/12 05:51 PM
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Joined: Jan 2008
Posts: 4,255
Canada
WO23Coronet
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master
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Canada
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Quote:
DO NOT MILL 6.1 HEADS.
You only need to run something about a 219/223. That has taken LX's into the low 11's with heads
The 6.1 doesn't need the higher compression. You can't run bigger than about 223/227 without running into serious piston to valve clearance issues.
When u day not to mill 6.1 heads is it because the decks are to thin? Or does it take away to much piston to valve clearance? Also, why does the Gen III get noisy valve train if you mess with the geometry? Sorry for the rapid fire questions just trying to learn about these engines
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Re: Gen3 question 6.1
[Re: WO23Coronet]
#1337284
11/20/12 06:00 PM
11/20/12 06:00 PM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
I Live Here
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I Live Here
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Houston, Tx
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Quote:
Quote:
DO NOT MILL 6.1 HEADS.
You only need to run something about a 219/223. That has taken LX's into the low 11's with heads
The 6.1 doesn't need the higher compression. You can't run bigger than about 223/227 without running into serious piston to valve clearance issues.
When u day not to mill 6.1 heads is it because the decks are to thin? Or does it take away to much piston to valve clearance? Also, why does the Gen III get noisy valve train if you mess with the geometry? Sorry for the rapid fire questions just trying to learn about these engines
1. 6.1 heads are expensive and not getting any cheaper. No reason to cut them. There is plenty of room and material to tailor compression in there without cutting the deck.
2. They aren't thin. Only the 5.7 eagle is thin in a few spots, but nothing really critical.
3. Most all hemi cams are ground on a 6.1 base circle. To compensate, a 5.7 block with a 6.1 cam would use 6.1 pushrods as a general rule of thumb to prevent uncessesary lifter movement.
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Re: Gen3 question 6.1
[Re: Garry Owen]
#1337288
11/20/12 07:41 PM
11/20/12 07:41 PM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
I Live Here
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I Live Here
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Quote:
Tracking. I have a few tuners in mind right now.
Jerseyboy, Hemituner and lafrad all come to mind as really good tuners.
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Re: Gen3 question 6.1
[Re: AlexP]
#1337289
11/20/12 08:30 PM
11/20/12 08:30 PM
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Joined: Dec 2004
Posts: 1,069
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Garry Owen
OP
super stock
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OP
super stock
Joined: Dec 2004
Posts: 1,069
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Quote:
Quote:
Tracking. I have a few tuners in mind right now.
Jerseyboy, Hemituner and lafrad all come to mind as really good tuners.
Those and I heard Johan is pretty decent.
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Re: Gen3 question 6.1
[Re: AlexP]
#1337290
11/20/12 11:24 PM
11/20/12 11:24 PM
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Joined: Jan 2003
Posts: 3,943
Melbourne.....Oz-land
Moparmal
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master
Joined: Jan 2003
Posts: 3,943
Melbourne.....Oz-land
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Quote:
Quote:
Tracking. I have a few tuners in mind right now.
Jerseyboy, Hemituner and lafrad all come to mind as really good tuners.
Just wanted to say great info - and kudos for helping the OP out...I have been reading the "run around" he was getting on the other forum.
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Re: Gen3 question 6.1
[Re: Moparmal]
#1337291
11/21/12 12:26 AM
11/21/12 12:26 AM
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Joined: Dec 2004
Posts: 1,069
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Garry Owen
OP
super stock
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OP
super stock
Joined: Dec 2004
Posts: 1,069
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Quote:
Quote:
Quote:
Tracking. I have a few tuners in mind right now.
Jerseyboy, Hemituner and lafrad all come to mind as really good tuners.
Just wanted to say great info - and kudos for helping the OP out...I have been reading the "run around" he was getting on the other forum.
Well, I guess some message boards aren't for messaging.If I wanted to just call vendors I would have to start with. I was trying to reach out to the end user or someone who had tried something similar. I know there's some good guys over and some that are on both boards, that's why I threw out the question both places. Other than buying parts, I think I'll stick with moparts for answers.
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Re: Gen3 question 6.1
[Re: Moparmal]
#1337296
11/26/12 05:43 PM
11/26/12 05:43 PM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
I Live Here
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I Live Here
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Posts: 10,645
Houston, Tx
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Quote:
Quote:
Plus I think I read that once duration gets too high, the stock Gen III engines run into piston to valve clearance issues, someone correct me if I'm wrong but I think that's an issue as well
Spot on - 228 Intake is about the limit with the 6.1
The Arrington ST3-A runs this intake duration and AJ from that company confirmed to me that P-V was pretty tight but they get away with it.
But back to the duration question - these are Hyd roller profiles...so its apples and oranges comparing to the old LA flat tappet. 
This.
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Re: Gen3 question 6.1
[Re: Garry Owen]
#1337298
11/26/12 06:55 PM
11/26/12 06:55 PM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
I Live Here
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I Live Here
Joined: Sep 2003
Posts: 10,645
Houston, Tx
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Quote:
Alex, are you still in standing with Franks?
On a business level, no. Personally, yes. 
I can help you either way.
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