Hofmeister

Anyone have any feeling on gasket matching? I have an 87 4runner 22RTEC, cleaning up the castings and ridding your runners of the lips is it worth it? Also what about heat, making bigger exhaust/intake ports = smaller amount of metal around them = poor heat removal and hot spots?

DudeBud

never done it on a toyota motor. gaskets seemed close enough to the edge of the posts.all i would do is take to nasty casting flaws out of the ports and smooth them up a little

94x4

Any "smoothing" that is worth doing is strictly internal for porting and polishing purposes to increase HP and flow.

2ToyGuy

If you remove enough metal to cause a cooling problem, you've probably taken waaaay too much off. Other than that, I see no reason NOT to do it. Can't hurt anything, I don't think, and any improvement is beneficial, IMHO.

94x4

You're kidding, right 2ToyGuy ??

I've seen 4 bangers able to do some serious spanking, so why not his ?

2ToyGuy

Maybe I wasn't clear, which NOT unusual! What I meant was: What's the downside to gasket matching? Every horse we can get out of these engines, the better, and if it can get even 1 or 2 horses more, then why not do it? I was voting FOR doing the gasket matching, not against. And isn't porting and polishing a very good thing to do, as long as you're moderately carefull not to take so much off you break through into the water jacket or something like that? I'm all for anything that helps these little 22R's. I have no complaints with either of mine, but I'll take any horses I can get, especially when they're cheap (I am, why not the horses? )

Sorry if I sounded negative. That was certainly NOT what I had intended...

94x4

My bad there 2ToyGuy, must have misunderstood.

And "porting and polishing" is a very good thing to do to any engine for a number of reasons..., I concur.

2ToyGuy

No big. I misunderstand me all the time, why woudn't other folkes?
And now a question: How does one port and polish? I noticed when I had my 'Runner's head off recently, that the intake manifold and the intake ports on the head it's self had a pebbled finish on the inside. Is "polishing" polishing all that out smooth? Is there a special tool for this, or just get a dremel and go to town? Same on the exhaust side, I presume...As to "porting", is that making the ports on the head and intake manifold bigger, or something along those lines? Again, i would presume that sauce for intake is sauce for the exhaust side of things...I have always wondered about this stuff...I am NOT a mechanic, I just have a lot of experience with my two Toys and everything I can learn is to the good. "Knowledge is power", and in this case, quite literally!

kyle_22r

it's good for any engine, but it won't have as profound of an effect on a turbo'd engine since boost makes up for more restrictive air flow or poor port design.

94x4

Porting helps the turboed applications as well with increased flow rates, that is, the boost would'nt have to make up for anything if ported..., not to mention improved heat dispersal as well.

kyle_22r

you got me there!

porting is smoothing out casting flaws and rough areas, and enlarging bottlenecks in a casting. you don't need any special tools, just be careful that you don't make any huge changes if you're new to it and don't get too carried away and make a sprinkler head(one of my co-workers carved into a water jacket on a 302 head)

i'm not totally up to theory, some people say you want the walls as smooth as possible, another school of thought is that "knurled" intake runners and port walls will help better atomize the fuel for a more complete burn.

94x4

No prob...,

Just be sure to check the limits and tolerance specs before you begin so you'll know how open it can or cannot be.

"...sprinkler..."