Question on porting. **PICS**
#692221
05/08/10 12:18 PM
05/08/10 12:18 PM
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Pyper70
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So I am out in the garage and I wanna clean up my Edelbrock heads a little bit. I went ahead and bought a bunch of stones, wheels, and polishing bits for my dremel. I have some pics below and need some opinions. I have never cut into a set of heads before so some advice would be much appreciated. Picture #1. Its a water jacket. There seems to be some casting blocking the passageways, a few of the water ports are like this. Can I trim this flashing away? Picture #2. Exhaust ports. I am using RemFlex exhaust gaskets and the exhaust port of the Eddy head is 1.6425". The exhaust port on the gasket is 1.8890". Should the exhaust port match perfectly with the exhaust gasket? Picture #3. Intake Ports. I am guessing that the folks at Edelbrock opened these up as far as they will go with the gaskets they supplied. There seems to be very little to cut away. Should I leave this side of the head alone since it is opened so much? Picture 1. Picture 2. Picture 3.
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: Question on porting. **PICS**
[Re: Pyper70]
#692222
05/08/10 12:22 PM
05/08/10 12:22 PM
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Pyper70
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One more question....I noticed this as I was moseying around. It looks like the stock Champions are mismatched to these heads I have the Champion RJ12YC How far should the spark plugs be sticking into the chamber?
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: Question on porting. **PICS**
[Re: Pyper70]
#692223
05/08/10 03:11 PM
05/08/10 03:11 PM
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mojavered
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That is the wrong plug. That one is only 3/8" long. You need a 3/4" plug, RC12YC.
71 Challenger RT 440 / 727 / 8.75
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Re: Question on porting. **PICS**
[Re: Pyper70]
#692230
05/08/10 05:56 PM
05/08/10 05:56 PM
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mojavered
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Just find something like an Autolite that has these specs. The heat range could change depending on plug. 14mm Thread Size, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Resistor, Copper Core, Projected Tip, Heat Range 12
71 Challenger RT 440 / 727 / 8.75
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Re: Question on porting. **PICS**
[Re: forphorty]
#692232
05/08/10 06:20 PM
05/08/10 06:20 PM
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Pyper70
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Quote:
Don't open up the exhaust port to gasket size. Those Hedman shorties you have are likely smaller than the gasket.
Yeah...You got a point there....The Hedman's have an exhaust port of 1.5905...Looks like the exhaust port will flow right into the header flange. Might be some turbulence since the gasket is that much wider...Thanks for pointing that out.
Quote:
Just find something like an Autolite that has these specs. The heat range could change depending on plug. 14mm Thread Size, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Resistor, Copper Core, Projected Tip, Heat Range 12
Got it...I was finding both resistor and non-resistor, v-shaped, and what not....I'll hit up the parts store monday for those spec's you listed..Thanks
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: Question on porting. **PICS**
[Re: Pyper70]
#692233
05/08/10 07:16 PM
05/08/10 07:16 PM
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HotRodDave
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NGK and Nippon Denso make great plugs and you should be able to find one of those that work. Bosche plugs are the worst plug on the market, I have seen countless times where someone will do their own tuneup then bring us the car and can't figure out why it runs worse instead of better, get rid of the bosche with pretty much any other plug and the car is all better.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Question on porting. **PICS**
[Re: Pyper70]
#692236
05/09/10 08:32 AM
05/09/10 08:32 AM
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moper
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I dont think I could add much to Stanton's post. Leave the exh smaller, I like to remove the CNC "seam" from the intake ports... They do not enlarge them, simply machine the port in the right spot. Core shift can be an issue with them so some heads get ugly there. So I blend that. If you dont know what you're doing, leave it alone. That is the best instruction...lol.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Question on porting. **PICS**
[Re: joedust451]
#692238
05/09/10 11:38 AM
05/09/10 11:38 AM
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Pyper70
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When I took those pictures they were how the factory sent them....
Just finished
I went through and cleaned the intake ports with a tungsten carbide bit, followed through with 120 grit sanding drum, finally ended up polishing them with a mini wheel buff first course, then medium....
Cleaned up any casting flash in the exhaust side (down inside there was some)...
Cleaned up the water jackets and hit those with a 120 grit sanding drum.
I am gonna go to the "Jap store" tomorrow (Thats really the name of it) and see if they can get me some NGK's BKR5E or some Denso K16PR-U. With any luck I may have these installed by the coming weekend. Still battling a damaged Ulnar nerve in my left arm
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: Question on porting. **PICS**
[Re: Pyper70]
#692239
05/09/10 12:27 PM
05/09/10 12:27 PM
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BSB67
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Quote:
When I took those pictures they were how the factory sent them....
Just finished
I went through and cleaned the intake ports with a tungsten carbide bit, followed through with 120 grit sanding drum, finally ended up polishing them with a mini wheel buff first course, then medium....
Cleaned up any casting flash in the exhaust side (down inside there was some)...
Cleaned up the water jackets and hit those with a 120 grit sanding drum.
I am gonna go to the "Jap store" tomorrow (Thats really the name of it) and see if they can get me some NGK's BKR5E or some Denso K16PR-U. With any luck I may have these installed by the coming weekend. Still battling a damaged Ulnar nerve in my left arm
Did you completely disassemble the heads when you did this?
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Re: Question on porting. **PICS**
[Re: BSB67]
#692240
05/09/10 12:37 PM
05/09/10 12:37 PM
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Pyper70
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Uhhhhhhh,,, No... I shoved a wet shop rag in the intake port before I started and before I finished each port I blew it out with compressed air. Pulled out the rag, blew it out again, then ran through each port with a pressurized can of solvent and then blew that out with compressed air as well. Wiped everything down and put duct tape over all the ports. I have all the tools to remove the valve springs. Should I go ahead and remove that while I am at it, clean em up again and see how well the valves move in the guides?
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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