vs a ported h22/ h23 or b16/ b18 head?

 

309 CFM with the stock intake valve

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MAX_CFM &raquo;</TD></TR><TR><TD CLASS="quote">309 CFM with the stock intake valve </TD></TR></TABLE>

After how much work?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Innovation &raquo;</TD></TR><TR><TD CLASS="quote">After how much work? </TD></TR></TABLE>

Not that much thats about the limit on two 34mm intake valves

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MAX_CFM &raquo;</TD></TR><TR><TD CLASS="quote">

Not that much thats about the limit on two 34mm intake valves</TD></TR></TABLE>

As much work as a B series head?

 

if you were going to build an allmotor car what engine package would you pick from a flow and hp potential. I know its ot but which heads flow the best and what engine would you build regardless of chassis.

 

its nice to finally see some numbers, bisi always said they would outflow most ported b's stock, Brad what do you think about the flow characteristics do you think it has its advantages over an h22 or k20 ect, granted it would need larger intake valves

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Innovation &raquo;</TD></TR><TR><TD CLASS="quote">As much work as a B series head?</TD></TR></TABLE>

I think you already know the answer to this.

The B series is the most labor intensive of the DOHC Honda heads to port.

Edit: thought he was asking about H22 heads

 

F20C then a close tie between the H and K... Everyhting after that requires a lot of work to get up over 300 CFM.

From what Ive seen, the F22 head seems to flow about as well as a stock B series head which isnt all that great.

 

f22a (non-vtec 90-93) heads have better port geometry than f22b (later VTEC) heads. That's what i've found from searching on accordinglydone.com

 

Are we talking S2000 or Accord?

 

accord

 

what kinda numbers are we lookin at with 1mm oversized intake valves like a certain individual utilizes

 

somebody has gotta know somethin....i know one guy that does

 

On the F22C (S2000) we got well in excess 300 cfm on the intake with a stock port and valves.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote">On the F22C (S2000) we got well in excess 300 cfm on the intake with a stock port and valves. </TD></TR></TABLE>

 

yeah i ve read anywhere from 310-320cfm on a stock f20c head. but my question is if a ported k20 is capable of 350cfm, can bisi's f22 sohc head really make up another 50-60cfm with just bigger intake valves

 

I have my ported H22 flow figure chart if someone is ready to post the pic up for me.Just having the head ported and with 2.5exhaust line and 63mm throttle body it gave me 193whp and 160lbs/trq untuned.