DIY port and polish & tb upgrade (56k haha)

[xsiv]

my mate had 2 zc heads, the one were porting has been milled a mill or so to increase the compretion
we decided to have a crack at porting it as he broke his cam belt and we needed to take the head of to inspect it for dammage.
i dont know if it gunna gain any power, or make it flow better.
i know been a noob at porting could have drastlicy made it worse lol
i also had my old b16a tb lying around so we port matched the zc intake to the b16a tb to allow for the suposed\ incrased flow
it takes way to long to do this, im so glad were nearly over


many many hours into it(half way their)


the intake port 3mm wide then st and 2mm higher.(finshed product)


it suprised the size of the lip just befor the valve seat, with a bit off effor and time it's now gorn. (finshed product)


my mate seating the valves (wounder if it gunna seal per


finshed product




the zc vs b16 tb



the intake deffently needs some port matching


hoping for 5 hp gain
witch = about 1hp per 5h of work at least
and it not for my teggie, what the hell am i doing this for when my car not finshed

a

[Ped Rac3r]

It doesnt look too bad for a first timer. Just make sure you clean out the head real good. Most engines dont like foreign metals parts...

[Bananaman]

I hope he doesn't intend to reuse those valves. Thy look screwed in those pics.

[xsiv]

na the valves are all good, they just got a cutting compound on them. witch makes them look dirty as, we have not put the valve springs back in so it will get a good wash down to remove any of the metal nastyes.
i was just gunna use engin degreser. non crosive to alloy or steel.
will this be sweet??

[crx_bob]

Are you going to dyno to check the gain, or just go by feel?

[Ped Rac3r]

Originally Posted by xsiv

na the valves are all good, they just got a cutting compound on them. witch makes them look dirty as, we have not put the valve springs back in so it will get a good wash down to remove any of the metal nastyes.
i was just gunna use engin degreser. non crosive to alloy or steel.
will this be sweet??

Yup, that should be fine, then give it a good rinse with some water then dry it off with a compressor/air gun.

[xsiv]

im not sure, we never dinoed the old head, maby a flow test would be the best way to check, with the ported head vs the old one
it all depends on how much cash my mate has, mite just do it by feel.

[crx_bob]

Hope the difference is noticeable, that sounds like a lot of effort, :thumbsup: for giving it a shot.
Looking forward to hearing the results

[xsiv]

yeah well we should have the head finshed today or tomorrow, we getting back into it at 5 tonight,

[xsiv]

got it all cleaned up last nite.
the heads of the motor in the car. all the valves are seated.
all the springs and retainers are in except 3.
should have it finshed tonight.

[fatwagon]

honda heads flow very very very well for factory - usually you just remove the casting mark for a bit better flow - look at the r heads

[NAspirated]

what did you use to cut it, from the terrible pics i personally feel youve gone too far on the Long turn. I cant see the short turn at all. got any more, clearer photos?

didnt feel like deshrouding the Valves?? did you knifedge the divider?

I see youve blended the seats into the throats, but did you remove the pocket entirely?



Dont use degreaser, use Hot Soapy Water and a container large enough to immerse the entire head.

[Genkei]

take it wash world and spend few $$$ on the high pressure BLAST 8)

then shake it dry

put it by ur hot water tank for abit . .

[xsiv]

Originally Posted by NAspirated

what did you use to cut it, from the terrible pics i personally feel youve gone too far on the Long turn. I cant see the short turn at all. got any more, clearer photos?

didnt feel like deshrouding the Valves?? did you knifedge the divider?

I see youve blended the seats into the throats, but did you remove the pocket entirely?



Dont use degreaser, use Hot Soapy Water and a container large enough to immerse the entire head.

i used the 2 cutting compounds that came with t the kit for the valves

im a total amuture when it comes to porting a head.
what do u mean by deshrouding the Valves??
im not 100 % sure what u mean but do u mean just make it real thin, is that knifedging the divider?

yeas i have got ride of all the pockets and lips, it pritty smoth with no dips or bumps.
if u have any advice or tips please let me know.

[fatwagon]

personally i think you went too far if you have no experience - i dont have any experience but i got mine tickled and all they took out was the casting marks and a fraction more - ports are very well matched from factory - thats what makes honda rock

[NAspirated]

Originally Posted by xsiv

i used the 2 cutting compounds that came with t the kit for the valves

im a total amuture when it comes to porting a head.
what do u mean by deshrouding the Valves??
im not 100 % sure what u mean but do u mean just make it real thin, is that knifedging the divider?

yeas i have got ride of all the pockets and lips, it pritty smoth with no dips or bumps.
if u have any advice or tips please let me know.

It really depends on the intended usable rpm of the engine.

deshrouding the valves is removing the "hard" (sharp) edges around the valve seats and further into the chamber, i can still see them in your pic.

I was reffering to what cutting/carbide tips you used to cut the chambers and ports.
but since you mentioned valves, do you/your buddy know how to lap valves properly? ive seen some guys do some absolute shockers that they thought were real good.

Yea making the divider thin and sharp. great way to kill mixture movement. dont ever do it on a head that isnt intended for High RPM drag work.

The pockets on the long turn side, just under the seat ridge is one that doesnt need to be removed. it actually has a good purpose. its more important on the intake's than on the exhaust's, but theres no real need to remove it at all.

did you remove the Humps on the floor of the ports? and the humps on the walls of the port exit of the Exhaust's? i really hope not, otherwise youll be using that head for 10,000rpm and thats it.


unless your dragging the car, or putting a huge blower behind it, i feel youve gone too far. it would be a perfect head for high psi work tho.




One bit of advice ill give you is open out your short turns a bit more. keep a nice flowing radius, but they can be widened a bit more. this will give you high rpm flow gains without restricting it in the low rpm. that being said, i feel youve already gone past the low-mid rpm threshold.

better hope the rest of the engine can keep up.

[FORDSKIN]

Originally Posted by NAspirated

ive seen some guys do some absolute shockers that they thought were real good

Wonder who that was ops:

[NAspirated]

not you dude, yours were actually pretty good 8)

[xsiv]

thanks for all the tips, yeah i think from what ive read this head looks like it should be a high rpm of turbo head, good that were going to be turboing the lil crx some time, well we have a standard head if it turns out shit, hope not,
as for the lil bumps befor the valve, we did grind them down a tad, this was a bad thing right???

[Coupe-R]

Shit I wouldn't know where to start! I guess doing alot of reading could help.

Or you could just rip shit and bust and hope for the best hehehe
top work 8)

[xsiv]

well we had a set of subie ra heads witch are port and polished form factory, also a 4g evo kelford head to look at, i tyed to copy it, well sorta. lol

valves are all done, we putting it back on to the car tonight.
should be sweet with all the mods
bigger tb
port and polish
4,2,1 headers and 2" exhust,
should be a bit better 8O it better be lol

[Coupe-R]

hmm did you have a stock subie and stock 4g63 head to compare the bored ones with.

Maybe woulda been easier if you had a ZC or B series good flow job to copy off.

[xsiv]

yeah it would have been better but i dident.
or have a std subi head or evo head, only ported ones

[xsiv]

got the head back on. cant wait to go for a drive

[Soichiro]

I think you're bloody brave and I hope it goes like hell!