Did some practice P&P today -PICS!

[wild_maxx]

Well i've had this spare DE head sitting in my storage unit for a few months... so I decided to put it to use. The head is trashed.. the previous owner spun a rod bearing and kept driving the car.. that pushed alot of metal up into the head and that scratch all of the cam surfaces and journals pretty deep... so instead of spending the money to fix it I used it for practice.

I used an air grinder tool to remove some meat in the ports... on the intake I basically just gasket matched them and removed a little on the inside of the ports. One the exhaust side I removed quite a bit of material and polished it up with some emery cloth. I know you don't want the intake ports polished and smooth... this was just practice. I won't be doing this on my good head.. this is only practice.

Click pic for larger version.stock intake VS my P&P Stock exhaust port VS P&P I now know why headwork is soo damn expensive.. this is very time consuming work and needs to be perfect. (not that mine is)

[S13FX]

That looks awesome, but I have a question.

Why don't you want the intake ports polished and smooth?

[wild_maxx]

from what I have read around on the forums... is that with polish smooth intake ports the fuel will not properly atomize (sp?) and does more harm than good. One of the mechs. at work said thats not really an issue with FI cars since the fuel is being sprayed directly into the ports but others have said it needs to be a bit ruff in there....

[S13FX]

others have said it needs to be a bit ruff in there....

Yah thats what she said too :p

[Slipstream]

Yeah, you want to keep the intake ports no finer than an 80 grit.

[daconkiftador]

The head is trashed.. the previous owner spun a rod bearing and kept driving the car.. that pushed alot of metal up into the head and that scratch all of the cam surfaces and journals pretty deep... so instead of spending the money to fix it I used it for practice.

just for the record, damn straight i tried driving that b1tch home, i wasnt gonna call a tow truck unless I had to, lol!

[wild_maxx]

hahah I wasn't even sure if you did that or the previous owner of the motor.. I can't keep track since you have soo many damn motors in there. Its being used for a good purpose now tho.

[daconkiftador]

hell yeah, good luck with it.. *delete delete; but anways il just hit you up personally so i dont threadjack your shznt, player lol.

[Chezedik]

Exhaust could be enlarged, but is nice looking. The intake is a little to clean. You need to have a ported but unpolished finished on a MPFI car. It has to have some turbulence to aid in the atomization of fuel.

The real hard part is finding out exactly how deep you can go on the ports before you hit a water jacket. You can weld them up, but typically it will cause the water jacket to be worthless, and cause warpage in the head. So, having a spare head is nice because it will let you know how deep you can go.

Just be sure that you be even on the ports. And when you cut the center section be sure that you make it even and sharp (normally, you would not want it to be sharp, but this will create some degree of turbulence).

The money for this comes from the information that the people who do it know and the consistency they are able to offer.

[eazye2000]

There is a guy on here that actually took a junk head to his shop class, and cut it apart with a band saw. It shows exactly where the water jackets are and all that good stuff you don't want to cut into. He even bench tested it and documented it really well. I did my own porting/polishing on my head. Here's a bit of what went into that, as well as some pro's, and con's from everyone. It has some information for turbo, and non-turbo as well.

zerothread?id=222752

[Chezedik]

I have clicked through a lot of these links and there is some really good stuff. Don't forget about the link in the sticky of the guy you were talking about.

[wild_maxx]

Yep I already read that thread. Thats what made me want to practice on the spare head. I'm going to keep working on that head and take some more meat out of the exhaust ports.

[Chezedik]

I would like to see pics when you do.