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Home porting 5.7 hemi heads for Dummies?
#1382007
02/05/13 03:44 PM
02/05/13 03:44 PM
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Joined: Jan 2003
Posts: 10,169
Frostbitefalls MN (Rocky&Bullw...
gregsdart
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OP
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Frostbitefalls MN (Rocky&Bullw...
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Well, I have this set of 5.7 heads from an early (2006?) motor, and would like to clean them up a bit. But as the title of the post says, I don't know much about these heads, or porting.
So the plan is to get what info I can here, and tread very lightly with the die grinder. Anybody care to share?
My thoughts are don't change any general shapes, just clean them up and remove any ridges left by machining operations. Because this is going to be a carbed motor, I plan on leaving the ports on the intake side rough, using as course as a sanding role as I can find. The heads will then get sent out for a valve job with stock valves.
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Home porting 5.7 hemi heads for Dummies?
[Re: gregsdart]
#1382008
02/05/13 03:54 PM
02/05/13 03:54 PM
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Joined: Jun 2005
Posts: 2,776
Ontario Canada
MattW
master
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master
Joined: Jun 2005
Posts: 2,776
Ontario Canada
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No expert and planning the same thing. These heads are supposed to be easy because there is no short turn. One of the reasons they flow so well. Dulich (sp) did a set, spent little time and basically cleaned them up. They respond very well to a little porting. And before everybody jumps on me saying there is a lot more to porting than that. I agree just the new hemi would be easier. 
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Re: Home porting 5.7 hemi heads for Dummies?
[Re: gregsdart]
#1382010
02/05/13 04:28 PM
02/05/13 04:28 PM
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Joined: Nov 2008
Posts: 833
MN
hemidup
super stock
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super stock
Joined: Nov 2008
Posts: 833
MN
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Here's a cross section if that helps. The head was cut after a pocket port.
Jerry Williams.
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Re: Home porting 5.7 hemi heads for Dummies?
[Re: gregsdart]
#1382011
02/05/13 04:35 PM
02/05/13 04:35 PM
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Joined: Nov 2008
Posts: 833
MN
hemidup
super stock
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super stock
Joined: Nov 2008
Posts: 833
MN
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A couple pic's of what was taken out with the die grinder.
Jerry Williams.
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Re: Home porting 5.7 hemi heads for Dummies?
[Re: hemidup]
#1382013
02/05/13 04:37 PM
02/05/13 04:37 PM
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Joined: Nov 2008
Posts: 833
MN
hemidup
super stock
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super stock
Joined: Nov 2008
Posts: 833
MN
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Exhaust port. Don't touch the floor.
Jerry Williams.
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Re: Home porting 5.7 hemi heads for Dummies?
[Re: hemidup]
#1382014
02/05/13 08:59 PM
02/05/13 08:59 PM
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Joined: Jan 2003
Posts: 10,169
Frostbitefalls MN (Rocky&Bullw...
gregsdart
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I Live Here
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OP
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Frostbitefalls MN (Rocky&Bullw...
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thanks guys. So if I see things right, I can thin down the guides, leave the short sides alone, clean up the rest and they ought to work fine with my .580 lift cam. I assume, that due to time at max lift there just isn't much to be gained concerning flow numbers above about .550, and being a street type motor no increase in port volume other than absolutely needed. These are going on a 380 cube 5.7 block motor.
Last edited by gregsdart; 02/05/13 09:01 PM.
8.582, 160.18 mph best, 2905 lbs 549, indy 572-13, alky
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Re: Home porting 5.7 hemi heads for Dummies?
[Re: gregsdart]
#1382015
02/05/13 09:26 PM
02/05/13 09:26 PM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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Quote:
thanks guys. So if I see things right, I can thin down the guides, leave the short sides alone, clean up the rest and they ought to work fine with my .580 lift cam. I assume, that due to time at max lift there just isn't much to be gained concerning flow numbers above about .550, and being a street type motor no increase in port volume other than absolutely needed. These are going on a 380 cube 5.7 block motor.
have you put any thought into useing the Eagle head? smaller chamber, larger port and a beautiful casting stock? and same size port as the intakes being made by Ritter
my sandrolled Eagles
Last edited by sixpackgut; 02/05/13 09:31 PM.
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: Home porting 5.7 hemi heads for Dummies?
[Re: hemidup]
#1382018
02/05/13 09:43 PM
02/05/13 09:43 PM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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Quote:
Quote:
thanks guys. So if I see things right, I can thin down the guides, leave the short sides alone, clean up the rest and they ought to work fine with my .580 lift cam. I assume, that due to time at max lift there just isn't much to be gained concerning flow numbers above about .550, and being a street type motor no increase in port volume other than absolutely needed. These are going on a 380 cube 5.7 block motor.
Greg, Another view of the hand ported G3 intake port.
Jerry, taking pics without the flash on is key. you have nice pics on your website of them CNC'ed
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: Home porting 5.7 hemi heads for Dummies?
[Re: sixpackgut]
#1382019
02/05/13 09:57 PM
02/05/13 09:57 PM
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Joined: Nov 2008
Posts: 833
MN
hemidup
super stock
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super stock
Joined: Nov 2008
Posts: 833
MN
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Purdy! What valve sizes?
Here's a pic of the very first and only 5.7 closed chamber G3 Hemi heads. Yeah I had the quench pads welded up.
Last edited by hemidup; 02/05/13 09:59 PM.
Jerry Williams.
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Re: Home porting 5.7 hemi heads for Dummies?
[Re: hemidup]
#1382020
02/05/13 10:27 PM
02/05/13 10:27 PM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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stock valves. someday I want to do a manley valve upgrade with dual valve springs and a real cam
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: Home porting 5.7 hemi heads for Dummies?
[Re: AlexP]
#1382022
02/05/13 11:46 PM
02/05/13 11:46 PM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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Very Nice! did you use a buffer on the chambers?
Gen 3 power 6.22@110, 9.85@135
Follow @g3hemiswap on instagram
performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: Home porting 5.7 hemi heads for Dummies?
[Re: sixpackgut]
#1382023
02/06/13 12:03 AM
02/06/13 12:03 AM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
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I Live Here
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Houston, Tx
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Quote:
Very Nice! did you use a buffer on the chambers?
It's a micropolished chamber. It takes a little bit of work, but well worth the time.
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