Is it a good idea to port and polish an intake or cylinder head (w/o Flow bench), for the 'do-it-yourselfers or to just let a machinst do it?

opinions please

 

most people dot recommend it for the same reasons you stated(no flow bench) but it is the general idea that larger on the exhaust side does not hurt anything. Only thing you gotta worry bout is the intake side. If anything i would do what I did and port the intake side a little bit, and the exhaust side a bit more.

 

did you do it yourself and how if so?

 

You can do the basic stuff, largen the intake ports and match up to intake manifold, leave with rough abrassive finish. And you can polish the exhaust ports untill you get a mirror finish to prevent carbon deposits with in the port.

Valve ange job, shaving you can leave with your machinist.

 

I did a valve angle job, port polished head matched to ported intake mani. None bench flowed.
Gain about 5whp on a Mustang dyno and about 10 after SAFC adjustments.

 

ya just used a grinding attachment to do the rough cutting and then a sanding wheel to finish it off. Like was mentioned above, leave the intake rough and go nuts with the exhaust side....

 

cool, so could i use a dremmel? or is there a better tool out there?

 

I would get it done professionally, you can actually lose power if you don't do it right.

 

another way to do it i heard off an audi forum is you can run your car and suck sand in the intake, that way the intake side and the exhaust are both ported the same.

 

And then you blow your motor, please don't spread internet BS on the forum.

 

Wow...

Just wow...

Be sure to suck water in the intake after you're done with the sand to cool everything off...

 

I'd say go for it. Gasket matching will be good, just don't try and do a full race port. Stay away fromt the valves and valve guide areas. A dremel can be used, but will take alot longer than using a die grinder. If you use a die grinder, be carefull not to remove too much material by accident. Always keep the wheel moving. If you make any dips or pits, it will require you to remove more material just to smooth it out. There's alot of companies that sell porting kits that have all the grinding wheels and accessories you need. Just take your time.

 

Dude... WOW. I hope you were just playing.

 

No no, he was serious....

his car must be fast

 

lol i remember that thread



for cereal though....
Port matching is easy and you can do that yourself with a dremel.
Everything else is best left to a shop. However if your gonna have a shop do the important stuff, you might as well let them port match it too