Head Porting Question

[canhsusername]

I am going to port my 1st gen 4G63 - both exhaust and intake to be port matched with the gaskets respectively. I will have a machine shop do it, I guess they send it out to someone to port it because porting the head requires a flow bench(thanks dave :D).

I wanted to ask u guys if I ended up using cams(.800-.850 lift.. around there..) with my ported head, 18g - would I max out the flow of the head by using the stock valves?

Anything would help,

Canh

[Hal]

You will gain more from upgrading the turbo than you will from head work.

The 18g won't even come close to keeping up with a stock head's flow capacity.

Take the money for the head work and buy a 20g.

Oh yeah... BIG DSM cams are a tad over .4" lift measured at the valve.

Hal

[v413nc3]

I tend to agree with Hal on this one... pure price difference for about $1000 or so you can get a good turbo, selling your old one then ordering a new one (if that is possible with down time) yields even more money to spend on a great turbo, such as one of FP's or AGP's. Remember, good port work isn't cheap, and cheap port work isn't good.

[canhsusername]

Hey thanks for the info - yeah about those cams i couldn't remember exact number :D That would be a pretty good choice i believe... but my reasoning about porting the head now instead of later. I don't have the resources to pull my head off every other week - with school and work all the time. Well I shouldn't complain I own a DSM =) and DSM requires fair attention.

Thanks for the replies.

[Hal]

Here is the FFWD Stage IV head that arrived today:

Intake side (http://206.124.12.138/codsm/dsc00006.jpg)

Exhaust side with factory gasket (http://206.124.12.138/codsm/dsc00007.jpg)

Exhaust side, no gasket (http://206.124.12.138/codsm/dsc00008.jpg)

1mm over size stainless steel valves (http://206.124.12.138/codsm/dsc00005.jpg)

This head work goes for $1600 (not including the head). I'm glad I didn't pay nearly that much.

FFWD Head work (http://www.ffwdconnection.com/cylinderheads.htm)

You can buy a LOT of "other" go fast goodies for $1600.

BTW... this is actually done by BJ's FFWD just farms it out.

Hal

[dougs90gsx]

Hey Hal you went serious huh? How did you get a good deal? Do you know those guys out there? FFWD seemed like a great company also...

[Hal]

I got it second hand.

It had been installed but never run, still has the assembly grease on the valve seals and shafts.

Before I install it I will helicoil all of the holes and put all new studs in it.

I have to "trim" the stock exh. gasket and do a little port matching on the exhaust manifold.

Hal

[dougs90gsx]

DAMN YOU:D that is the head that I was going to look at... looks great...

[v413nc3]

Hal you suck... I have to pay full price