so i have my itr all apart head of and i wanna know if its worth the time to get the head milled.i know the guy at the shop so he will be doing it for a good price. will i se nice gains in hp. right now i have skunk 2 stage 2 cams with pro series cam gears,skunk 2 valve train, and i will be chancing the intake manifold and tb and i will mostly likely be putting high compression valves. the car will be getting tuned after all mods

 

Making this call would be dependent on what pistons you are using, amongst other things.

Thats a pretty big cam so a small bump in compression from milling the head might be benificial in your case. Your best bet would be doing some research in that combination paired with a milled head, and to what extent of material removed would best suit you.

I do know that you would need to find the centerlines of the camshafts again after mill using adjustable gears and the required hardware to degree your cams,
And claying your combustion chambers should be done also with those cams.
Then of course go re-tune.

 

Use a compression calculator (which you can find online) and figure out your effective static compression after milling the head. Its going to amount to a minimal bump in compression and a negligible increase in power. Unless the engine overheated and the head is warped, I wouldnt bother...

 

ok sounds good im just running stock itr pistons, will it be worth getting ported and polished?

 

If you have a true type r head, its already got the pocket (turn inside port behind valve) ported from factory. If it doesn't, someone suckered you. And it is better to raise compression w/pistons unless you know how to degree cams as someone else here mentioned. The valve job(3 angle) is more noticable throughout the revs than p&p, its only effective @ high rev, otherwise you won't notice.Back-cut/swirl polish your valves if they aren't already for more flow @ low lift.(valves are only @ max lift once, compared to low lift @ open AND close) take a look in my garage if you wanna see MY OWN p&p+ port match!

 

but since im chancing the cams and cam gears they have to be degreed? and the car will be tuned right after installing parts. and im just running stock compression so maybe il mill the head with high compression valves and oem head gasket. and il get the valve seats and guides done and i already have skunk 2 retainers and springs, you think i will be nice power with this done, and what would be the best valves to use? the shop around here was trying to sell me some ferarra valves and super tec seats and guides

 

Milling the head is not a good idea . The power gained from milling is not worth the headache of milling.if you're trying to make more power of the head have your chambers worked and get a nice valvejob and a resurface .

 

but the shop is giving me a good deal and they have did many heads. could higher compression piston be and idea? but can i use high compression piston on a stock block and i guess the engine will have to come out of my car???

 

Yes you can use higher compression pistons you will have to hone your block and since its out your best bet would be to overhaul it all together. New piston set with rings, bore hone deck, new bearings,and atleast arp rod bolts. Milling the head is the cheap way but not the best.

 

so i guess its not a good idea to mill? i guess will just chance the valve guides,seats,valves, and i already have still in the box ready to go,skunk 2 reatiners and springs with stage 2 cams and pro series cam gears oh and a mugen head gasket

 

You can rebuild the head and install all your parts I'm wondering if you are unsure what milling is ( no disrespect intended) milling is a process that refers to cutting the deck of the cylinder head to a excessive amount usual near or past the factory indicators in order to obtain higher compression. Resurfacing a head is the process of skim cutting. The deck in order to insure straightness and a proper seal, usually cutting the minimum.

 

Yesss! If you can't degree cams, don't mill the head any more than a resurface- it can get very complicated... valve job! P/S sounds like that machine shop is trying to sell you more than you need. If your guides/seats are in decent shape there's no need to replace them other than spend your $...

 

ok that clears it up, but by the milling the head will the bump in compression be enough to notice power gains with the cams that i have and how much should be taken off

 

I had my head shaved .010(10 thousandths). Problem is, now I would have to grind valve reliefs(indentations) in pistons to make room for high lift cams... not to mention having to degree the cams in order to "re-zero" cam timing(adjustable cam gears). If your cams have more than 12.5mm lift on vtec lobe(larger than type r) you also need to run specific lma's(lost motion assembly) to avoid broken cams/premature valvetrain wear. Pretty technical stuff, I highly recommend more research and changing pistons vs milling head...

 

thanks for the info i wont be getting the head milled after all,thanks again

 

I wlould say your cams need compression so raise it to have more power..you should check your v2v clearness and v2p clearness as well to see that everything is ok so you can decide if there is a free space to Mille the head.
But after all I go with (raise the compression) after doing v2p clearness .