Anyone have any power results on how much they gained from have your head ported?

Thinking about getting it done sooner than later depending on the gain i would see, just would have to rearrange my budget for my build to fit it it...

really wanting to see some before and afters

here is my set up:
b18b block - bored to 81.5mm
polished and balanced ls crank
JE pistons 12:1
eagle h beams
acl bearings
Arp Rod Bolts
Arp Head Studs
B16 head - stock port
Buddy Club Spec 4 Cams
Buddy Club Cam Gears
Supertech springs
Skunk2 TI retainers
AC fuel rail
AEM Fuel pressure regulator
apexi exhaust world sport,
magnaflow high flow cat
RC 310's
walbro 255
s2 pro IM
s2 TB

 

What is your setup? ie..... head (main component people need to know), block, bore, stroke, compression ratio, cam specs?

What are your power/flow goals?

I'm sure that if you search you will find some flow numbers for setups close to yours. Or are you basing your build purely on flow numbers? I bet your looking for 300cfm right...

 

want something that flows well, just a basic street port is all i really am looking for...

 

your not going to fully use the stock ports with your setup and porting will not gain anything for what your doing. the truth is a tough pill to swallow. also there are only a very few who actually know how to correctly port these heads. there are many other things you could do to make more power for less money, like extrude honing the intake mani will gain 3x the power and cost half the price. the stock head flows very good btw, and until the K motors came to be was one if not the best flowing factory stock 4 cyl head in a production car. why people feel they have poor flow stock is just plain stupidity and ignorance.

 

interesting!!!

 

Send the head to Steve at www.cccylinderheads.com for a basic street package.

 

yeah i got the hot street package from steve, and picked up about 8whp while dynoing/re tuning in air that was about 30 degrees warmer than the previous numbers.

 

One of the few smart people on honda-tech.

 

come on steve, its a 1.6L....obviously the head flows bad.

 

another thing people tend to over look is that more often than not when a head is ported it is also milled increasing the compression ratio. on a ported head that had a mill also done and you gain 8whp how much was from the compression increase of that 8 whp? also if you have a head that was old and had leaking valve seats then got it ported and it gained 8 whp how much of that was gained from the valves now being sealed and not bleeding hp.

saying a ported head gained you 8 whp means to me that there were no other changes at all and everything is exactly the same except for the head porting. It would be like putting an exhaust on and saying you gained 20 whp from the exhaust but you added cams and a header at the same time. lets not confuse reality and fantasy

 

Can you recommend a extrusion hone company, I'd be interested in checking out the cost.

How would you rate a manifold built with parts form Ross Machine Racing, probably could be done for about $250 plus Tig work.

 

http://www.extrudehone.com/auto/auto-performance.php

its about 350 -400 to do a manifold.

 

i live under a rock and know nothing about this proccess. tell me more. flow charts would be cool to look at and an explanation as to why this is more cost effective than a pnp would be greatly appeciated. you make a great point about the milling and new valve stem seals adding to the bump in hp. i never thought about it like that. so for the average build (not full race), is a pnp overkill or is it?

 

because there is a point where you loose velocity but gain flow, and doing this does nothing more than clean up the port and removes very little material, keeping velocity up. A ported head is just like a motor, it might look good on the testin apparatus(dyno or flow bench) but perform poorly once actually put to the test On the average build alls you need is a good fresh valve job and that VJ blended into the bowls, not a full out port.

 

so the speed at which the air flows is more important than the volume of the flow? in a perfect build i would like both correct?


lol you were answering my post as i was thinking it.

 

yes and the good head porters know what to do to get both in perfect harmony and to work with the cams,compression ect.

 

great. so without a pnp would a larger tb portmatched to the manifold help in the flow department.

 

thanks for all the help, ill prolly just fresh everything up then and save some cash to finish the rest of my build!