Home Porter Pics, NO CNCs
09-02-2009, 04:15 PM
#41
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in porting, if you havent done it simple rules apply. 1 polish only the exhaust runners, 2 a good vj and bowl work help, 3 after the 1st inch and a half dont worry too much past that. 4 you dont have to take too much materal away, 5 dont worry so much about making the intake runners smooth (it actually makes the air stick instead of swirl). 6 the floor of the intake runner needs little to know work (just leave alone if your not port matching).
i started on a set of bad old castings to see how far i could go with a set. little practice never hurts. take your time, and call around to your local machine shops to see if they will flow them for you. o and also have the vj done after you have ported the heads. and stay away from the guides.
i started on a set of bad old castings to see how far i could go with a set. little practice never hurts. take your time, and call around to your local machine shops to see if they will flow them for you. o and also have the vj done after you have ported the heads. and stay away from the guides.
09-02-2009, 04:31 PM
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in porting, if you havent done it simple rules apply. 1 polish only the exhaust runners, 2 a good vj and bowl work help, 3 after the 1st inch and a half dont worry too much past that. 4 you dont have to take too much materal away, 5 dont worry so much about making the intake runners smooth (it actually makes the air stick instead of swirl). 6 the floor of the intake runner needs little to know work (just leave alone if your not port matching).
i started on a set of bad old castings to see how far i could go with a set. little practice never hurts. take your time, and call around to your local machine shops to see if they will flow them for you. o and also have the vj done after you have ported the heads. and stay away from the guides.
i started on a set of bad old castings to see how far i could go with a set. little practice never hurts. take your time, and call around to your local machine shops to see if they will flow them for you. o and also have the vj done after you have ported the heads. and stay away from the guides.
09-02-2009, 05:41 PM
#44
wow....so many ppl think they know soooooo much, **** that **** is annoying. i ported my own heads, and with only a dremel and slower speed drill....at first you doubt your self but after a while i looked back....at 25+ hours of work and the heads looked great Now i know NOTHING MORE THEN THE NEXT IDIOT but **** i tryed and they put out. i just wanna see the ******* that says someones going to destroy there heads by home porting, and show me one person that has ever hurt there heads by porting...im sure there has been but ITS NOT COMMIN...
09-02-2009, 06:10 PM
#45
in porting, if you havent done it simple rules apply. 1 polish only the exhaust runners, 2 a good vj and bowl work help, 3 after the 1st inch and a half dont worry too much past that. 4 you dont have to take too much materal away, 5 dont worry so much about making the intake runners smooth (it actually makes the air stick instead of swirl). 6 the floor of the intake runner needs little to know work (just leave alone if your not port matching).
i started on a set of bad old castings to see how far i could go with a set. little practice never hurts. take your time, and call around to your local machine shops to see if they will flow them for you. o and also have the vj done after you have ported the heads. and stay away from the guides.
i started on a set of bad old castings to see how far i could go with a set. little practice never hurts. take your time, and call around to your local machine shops to see if they will flow them for you. o and also have the vj done after you have ported the heads. and stay away from the guides.
1) You can also polish the combustion chamber.
2) A good VJ and blend will pick up 15-20 hp, the same as the guy who dove in and "ported" his own heads. Probably got all of his gain from the valve job.
3) don't worry past an inch and a half if you want a half done head.
4) In certain areas you DO have to take a lot of material away.. so many porters just WISH there was 30-40 thousandths more metal in a particular place so could get the shape they really want the runner to have.
5) You don't want it polished yes, but you don't want it rough. a 120 grit is fine and will look smooth. It helps remove surface irregularities.
6) The airflow over the short side radius is one of the most important parts. It definately needs to be addressed. This area has nothing to do with port matching. If you are trying to significantly open up the entry of the intake port and lowering the floor, then you're just an idiot.
On another point: Profiling the guide bosses properly is going to be a big part of your mid lift gains. You DEFINATELY don't want to leave them alone.
I'm all for people cutting up their own heads though. I just hate to see bad info out there.
09-02-2009, 06:22 PM
#46
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son i own my own bussiness. I am a machinist and do this for a living. i was giving him the very basics to start with. what i told him would not hurt the flow of the head. and he could pick up a few cfm. I know that Turbo cutlass knows what he is talking about because he does this for a living also. No one cares if you were talking to big name head porters. i was tought by mondello's top student Creek. do this for a living to feed your children and then come talk to me.
Last edited by novaflash2002; 09-02-2009 at 06:27 PM.
09-02-2009, 06:41 PM
#47
son i own my own bussiness. I am a machinist and do this for a living. i was giving him the very basics to start with. what i told him would not hurt the flow of the head. and he could pick up a few cfm. I know that Turbo cutlass knows what he is talking about because he does this for a living also. No one cares if you were talking to big name head porters. i was tought by mondello's top student Creek. do this for a living to feed your children and then come talk to me.
edit: Why is it every time someone on this site has a contradictory opinion they get tarred and feathered? I get tired of being victimized over here when I'm just trying to help people out.
Last edited by Paint_It_Black; 09-02-2009 at 06:46 PM.
09-02-2009, 07:20 PM
#49
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posted by stl200mph-------------------------------------------------------Turning wrenchs and being a good head porter is two different animals to say the least.... Sounds like you are getting ready to phuch up a set of heads....please have them flowed when you finish so that we can see how well you did...good luck ...
What is there to misunderstand about this reply? As far as the internet tough guy What do you expect, that being said I am trying to make the most out of the castings I have by blending, some light porting and a 5angle VJ. When Im done will they flow as much as your TEAs, HELL NO. But I can live with that can you? Cncing is great no argument here, if that's the way you want to go. I'm not. My question to you is if you been rodding since the 60s have you never tried to make the most out of the parts or setup you had by any means? Oh on the heads I have a few sets thanks anyway.
What is there to misunderstand about this reply? As far as the internet tough guy What do you expect, that being said I am trying to make the most out of the castings I have by blending, some light porting and a 5angle VJ. When Im done will they flow as much as your TEAs, HELL NO. But I can live with that can you? Cncing is great no argument here, if that's the way you want to go. I'm not. My question to you is if you been rodding since the 60s have you never tried to make the most out of the parts or setup you had by any means? Oh on the heads I have a few sets thanks anyway.
Last edited by BaddBird; 09-02-2009 at 07:33 PM.
09-02-2009, 08:55 PM
#50
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the reason for not working on the floor of the head is, a ls seriers facorty style ,be ls1 ls6 l92 fast have a loop style runner. just like a roller coaster it wants to move to the outside edge not the bottom. now for a victor or carb style intake it is just opposite. the reason for only going 1 1/2 inch is, it will bring more air in and at the point where the air and fuel mix from the injector shooting gas in slows the air anyway (about 1 1/2 inch in). i never said dont touch the meat around the guide i said dont touch the guide. u are correct that a vj and some bowl work will pick up more power.
i belive this gentleman is looking for some decent flowing heads not all out race heads. that is what we are trying to help him with.
who cares about my spelling im not great at it, but i can get my point across.
i belive this gentleman is looking for some decent flowing heads not all out race heads. that is what we are trying to help him with.
who cares about my spelling im not great at it, but i can get my point across.
09-03-2009, 07:47 AM
#52
posted by stl200mph-------------------------------------------------------Turning wrenchs and being a good head porter is two different animals to say the least.... Sounds like you are getting ready to phuch up a set of heads....please have them flowed when you finish so that we can see how well you did...good luck ...
What is there to misunderstand about this reply? As far as the internet tough guy What do you expect, that being said I am trying to make the most out of the castings I have by blending, some light porting and a 5angle VJ. When Im done will they flow as much as your TEAs, HELL NO. But I can live with that can you? Cncing is great no argument here, if that's the way you want to go. I'm not. My question to you is if you been rodding since the 60s have you never tried to make the most out of the parts or setup you had by any means? Oh on the heads I have a few sets thanks anyway.
What is there to misunderstand about this reply? As far as the internet tough guy What do you expect, that being said I am trying to make the most out of the castings I have by blending, some light porting and a 5angle VJ. When Im done will they flow as much as your TEAs, HELL NO. But I can live with that can you? Cncing is great no argument here, if that's the way you want to go. I'm not. My question to you is if you been rodding since the 60s have you never tried to make the most out of the parts or setup you had by any means? Oh on the heads I have a few sets thanks anyway.
09-03-2009, 10:00 AM
#54
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Exchanging ideas, concepts, and information is the whole point of this forum. You seem to think that being a internet warrior dealing in confrontation and argument is what is important. All this hostility means you obviously have trouble dealing with others with opinions different than yours. Maybe some anger management would be in your best interest. As I said before good luck with your porting and please follow through and let us know the flow numbers unless are you just going to assume that you did it correctly. As far as my hot rodding skills goes I am very confident in what I have accomplished in this sport/hobby. I NHRA class raced for many years and have won my class at national events and set a couple of NHRA national class records along the way. Competing on a national level will let you know where you rank with your fellow hot rodders. If you think that you are a good mechanic or "wrench turner" as you put it I say go class racing and you will see where you stack up. Peace ...
08-29-2010, 08:03 AM
#57
Old thread...thought I'd post my L92's I polished up. Took the sand casting flash off the insides of both the intake/exhaust ports and smoothed out the area below the valve seats...
This was done with my SKIL drill, flexible shaft, and one of those DIY porting kits from summit (sandpaper rolls).
This was done to a set of L92's I purchased from a board member that was caked full of carbon/oil that I cleaned myself. I have $50 bucks in this job
Excuse the date and the extra gunk on the valve guide hump lol
This was done with my SKIL drill, flexible shaft, and one of those DIY porting kits from summit (sandpaper rolls).
This was done to a set of L92's I purchased from a board member that was caked full of carbon/oil that I cleaned myself. I have $50 bucks in this job
Excuse the date and the extra gunk on the valve guide hump lol
