I have been told porting stock exhaust manifolds (rino horn) can cgive you just as much horespower as some headers. Has anyone done this. I have stock heads ( no porting or anything) 67 camel hump on a turbofire motor will this give me any more horses how much. how do you do this? would polishing the manifolds help at all?

thanks to everyone in this forum y'all have been a big help in my buildup.

I've done this way back when to a set of '55 logs.

I just used my old B&D 1/4" drill and some cheap Chinese stones and ported each port out and funneled them back into the log.

Then carefully opened up each outlet taking care not to make them too thin b/c I figured if I got them too thin, the gaskets would be too thin, plus, they might crack and fall off. (And I have removed the heat-riser butterfly shaft and had both holes brazed closed so I could still use a gasket on that side.).......... This won't pass a smog visual tho on a newer car!!

It has been printed that Brezinski's ported stock cast-iron jobbers will produce about a third to a half the power good headers will make. I would have to dig for several hours to find the article???

Kinda like this.

Stock, worked over stock, then shorties and finally 4-tube, long headers. And Tri-Y headers on some applications make as much power as longs do and on some applications they don't. BUT Tr-Y's are generally the easiest to install and fit the best.

Hope this helps??

pdq67

I did PM back to you OK so please disregard my other comments wanting to verify if I had answered OK for you.

pdq67

Yep, pdq67's right the Brezinski's are very good stock manifolds. I believe they use a slurry compound that is pumped/pulled through the manifolds to port them, so you get a very smooth transition from one area to the next. They are the hot set-up for circle track guys who are forced by rules to run "stock" engine components. Pdq67's method is the way most of us early guys did it for years, due to our old adage of "never pay someone else to do what you can do yourself for free". This was in the days before plastic money, when you either payed in cold cash, or traded for something the other guy wanted. I would like to show you a photo of some "stock" manifolds I ran on my 383 for several years, but have never figured out how to post photos on this site.

Sounds like b-boy is a tight-as-, er, eh, "FRUGAL" like me is all...

He, He!!

Yea, I guess I am. Of course, when I was young, I didn't have any choice. I worked for every dime I got, and I didn't get many dimes for as hard as I worked! Summer time on a farm, you would get 5 cents per bale of hay that you picked up, threw on a truck/trailer, and then stacked in a barn. Outside temps 90-100 degrees, inside the tin roofed barn 20 or more feet in the air? WAY hot! 12 hour days, all day, maybe 25 bucks?! After that, working in a food processing/grain mill shoveling rotten corn out of an underground storage facility where it would fall off the conveyor belts as the trucks unloaded. Construction sight work, etc. Hard work, cheap pay! But it did teach me how to work hard and appreciate the value of a dollar bill. Something that most kids today have no clue about. Go by most high schools and you will be amazed at all the shiny new cars the kids are driving. Who bought them? Mommy and daddy. Oh well, no soap box today. But I remember going to the junkyard, buying carter 4-barrels for 10 bucks each, taking them home and rebuilding them from a kit. No way i could have bought one new. I went to the junkyard once, bought a set of headers for 25 bucks, took them home and cut them up and rewelded to fit my car. I just couldn't afford to buy a new set for 75-100 bucks. That's just the way it was. But there was also something neat about actually hand building that part instead of just buying it new. It also taught me patience when I did something, and intolerance for whinny liberal do-gooders that think it's wrong for poor young people to actually have to work hard for something. I guess we are each shaped by our youth.

Yes, I too have hauled hay! Helped cut both the calves and the hogs. Killed, scalded and plucked chickens, etc..

Worked at our local grain elevator from 15 until I got out of Highschool in the summer. First summer was cash, 70 cents/hr for (6) 10 hour days usually in the back cattle feed mill, but when it was slow helped mix and load hog feed out the front hog feed mill's door and even a couple a times out on the Portable Corn-Sheller but I couldn't shovel long/hard enough to feed it b/c I was only like 125 pounds soaking wet!!!!

After that, the next year, I got paid $1.25/hr and could work as many hours as I wanted, but then I was on the books so taxes and SSI was taken out! Made almost $80 clear one week!!

AND yes, I have helped clean the bottom of the "leg" out after wheat season was over !! Used a hand scoop and a #14 grain scoop. Maggots about two feet deep!! Stunk to high heaven...

Graduated and the next spring got on the old N&W RR on a traveling Tie Gang with my B-i-L and stayed for 2.5 years, then quit and went back to school to get my BSME degree.. Oh, almost forgot, got married in there too....

All this after Dad left us kids and Mom alone on the farm.... Dad worked right up to within two weeks of his death and died on the operating table from a brain tumor. You don't know how much I wish he and now Mom were here to see our precious little Grandbaby, and Dad, my beautiful red-haired Daughter too..

I guess I'm still not over it b/c I talk about it alot on the Boards with those I call "e-friends".. (It's been darn near 45 years ago too!!)...............

Our Grandbaby is coming over for I expect the night shortly so the floors will be crawling with toys and Papa down on his knees and back playing too...

pdq67

Yea, I know what you mean. My dad died quite a few years ago of lung cancer; he'd smoked since he was 12. I too wish he was here to see my wonderful daughters, their kids, and how I am doing right now. I do believe he would be very proud, as I came a long way from where I started. I took a lot of very stupid, dumb roads to get here where I am, mostly because I was too hard headed and just had to find out things for myself, mostly the wrong way! But, such is life for some of us.

Gotcha guy!

pdq67

Didn't there use to be a place or service called Ex-trood-hone?? I know spelling is off but it was something like b-boy was talking about. I use to see ads in the back of SS&DI for it.

Yes, Extrude-a-Hone, it is still business that I know of!!

Good one but I bet it is pricey to say the least!!

pdq67

b-boy
Senior Tech Join Date: Oct 2000
Location: Menlo Park, CA
Posts: 345

Re: How can I home port stock exhaust manifolds?

--------------------------------------------------------------------------------

Yea, I guess I am. Of course, when I was young, I didn't have any choice. I worked for every dime I got, and I didn't get many dimes for as hard as I worked! Summer time on a farm, you would get 5 cents per bale of hay that you picked up, threw on a truck/trailer, and then stacked in a barn. Outside temps 90-100 degrees, inside the tin roofed barn 20 or more feet in the air? WAY hot! 12 hour days, all day, maybe 25 bucks?! After that, working in a food processing/grain mill shoveling rotten corn out of an underground storage facility where it would fall off the conveyor belts as the trucks unloaded. Construction sight work, etc. Hard work, cheap pay! But it did teach me how to work hard and appreciate the value of a dollar bill. Something that most kids today have no clue about. Go by most high schools and you will be amazed at all the shiny new cars the kids are driving. Who bought them? Mommy and daddy. Oh well, no soap box today. But I remember going to the junkyard, buying carter 4-barrels for 10 bucks each, taking them home and rebuilding them from a kit. No way i could have bought one new. I went to the junkyard once, bought a set of headers for 25 bucks, took them home and cut them up and rewelded to fit my car. I just couldn't afford to buy a new set for 75-100 bucks. That's just the way it was. But there was also something neat about actually hand building that part instead of just buying it new. It also taught me patience when I did something, and intolerance for whinny liberal do-gooders that think it's wrong for poor young people to actually have to work hard for something. I guess we are each shaped by our youth.



Funny you should mention thet becaues I am only 18 years old. And because my car is 100 bucks a month and you can match that for gas 92 octane add go to school and I have a girlfriend you can guess the situation i am in. My uncle bought my 67 impala but I am paying every cent of it back. I can't afford headers but i would like the sleeper look anyways, Im happy that the sleeper look is also less expencive. Kids at my school drive brand new civics, and the russians (vancouver, wa is basically little moscow) buy mb's and bmw's with their goverment checks and most have more than one. Im just happy my little 67 impala will blow all them away. Take it from a kid, thease kids today don't know the value of money nor the value of others property, I have been hit twice at school while I was in class and do you think anyone left any info? People in your day had fun with their cars but now kids don't understand the limits of their cars, and they think their professional drivers because thes saw fast and the furious three times and have a cold air intake and a fart can muffler.

Anyone have a link for a Brezinski website ?

A search didn't turn up anything.

Here it is! I can't spell for sh--, er, eh, "very well"..

http://www.castheads.com/

pdq67