I currently porting a S2000 head for a Pro FWD driver (Leevon Elsie) and I was pondering how much power anyone has found in street apps.. I would also like to know if these power increases included larger valves, how much the head was milled, and if you kept the stock cams. Thanks.

 

Considering that you are the one doing the head work, I would kind of hope that you would know what you're doing and wouldn't have to ask some of those questions.

Ben

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by neonorific20 &raquo;</TD></TR><TR><TD CLASS="quote">Considering that you are the one doing the head work, I would kind of hope that you would know what you're doing and wouldn't have to ask some of those questions.

Ben</TD></TR></TABLE>

Considering you are not doing the work, it is best to leave the questions for Dave if he wants to know something.


Dave - check out on s2ki.com - there was some extensive research done on headwork. I believe UltimateLurker was working on this a few years ago with an engineer.

 

I'm just going throw my $.02 in here....

Since you are going to keep stock cams, don't over-do it on that porting. And if you have a flow bench, use it after doing a little bit of porting.


I would suggest just a MILD port job but would stress more a good polish job. <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr. Bagel &raquo;</TD></TR><TR><TD CLASS="quote">

Considering you are not doing the work, it is best to leave the questions for Dave if he wants to know something.


Dave - check out on s2ki.com - there was some extensive research done on headwork. I believe UltimateLurker was working on this a few years ago with an engineer.</TD></TR></TABLE>

 

http://www.vtec.net/articles/v...=6500

Several owners have had their heads ported by various places and had less than good results.

Joe Alaniz has a proven track record. With his head I'm seeing about 40 to 60 hp. I have oversized stainless steel valves (0.5mm) and we increased the exhaust flow almost 17%

Other big hp owners have used Joe Alaniz also. Chris Barnes in making 559hp or more with an Alaniz head.

Since the F20c head flows better than anyother production head a quick port job can hurt dramatically. You must know what you are doing or you will loose HP so practice on a few heads and flow them. Let us know your results.

 

I am not trying to toot my own horn here but I guess some might not see my sig

I am no dummie, I port heads for some of the fastest cars in sport compact racing.

I wasn't asking anyone what to do to Leevon's head or a street head I was wondering how much power some have got out of it and what size valves they used when they did so.

I Don't want to know how much someone got on the flow bench I am only concerned with HP figures.

And I would also like to know where the peak HP was.

Thank you Mr. Bagel I will check that out.

People learn by asking questions....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HEAD &raquo;</TD></TR><TR><TD CLASS="quote">I am not trying to toot my own horn here but I guess some might not see my sig
I am no dummie, I port heads for some of the fastest cars in sport compact racing.
I Don't want to know how much someone got on the flow bench I am only concerned with HP figures.
And I would also like to know where the peak HP was.
People learn by asking questions....</TD></TR></TABLE>

We peaked HP at 9200 rpm and torque at 8800 rpm.

Some have gone as much as 1.5mm oversized but it requires offset guides with stock bore.

As far a milling, I have seen chamber volumes from 53cc (milled .020) to 56cc (0.002) with other changes. The factory chambers varying around 53.5cc.

The retainers on the S2000 are totally inadequate and crack and drop valves frequently. Make sure you use aftermarket Ti retainers.

Let us know what you find and end up with and keep us posted on your quest.

Quick question. If you port heads for a living, why are you not interested in flow numbers?


Modified by Sideways at 7:38 PM 7/15/2004

 

dave my name is pat i am the guy doing the car and the motors we are not going to be uesing stock cam i am having cam blanks being made now i would like to know some cfm numbers so we can get the cams going you can im me or call 619 461 0203 thanks for your help pat

 

It's not that I am not interested in flow numbers, just I am only concerned with my own numbers and not anyone else's . I am more interested in HP numbers because we are not racing flow benches, HP gets you down the track or off the light, not a flow bench. At the end of the day would you rather have a head that flows awsome on the piece of paper you got or the head that makes so much power everywhere in the power band that you can not keep your foot off the gas pedal.

Pat, I will call you next week.