i was jus wonderin since my h22 has stock 11.0:1 would it be worth goin higher compression or not? what would be the advantages of an n/a motor and the reliability. not sure if im forgettin anything but this is jus my main ques for now thanks

 

Kind of depends on what kind of octane is available, what bolt-ons/modifications you have etc. Usually most street H22's won't go any higher than 11.5:1 (for 91-93 octane gas) & if I were you I would leave that Type 'S' block of yours alone. A jump from 11:1 to 11.5:1 is basically 5 horses, the more serious your modifications the more you'll get from the exta compression. I would suggest trying a thinner headgasket, it's a fairly cheap & simple non-permanent way to bump up the compression. Then down the road if you start seriously modifying your car you can do things to the head to bump up the compression more (flat valves, weld the chambers, etc.).

If the effort/cost of throwing a thinner headgasket on isn't worth 5 hp to you than don't worry about it, 11:1 is a good ratio for a street car.

 

Could one of you guide to a good site where I can purchase that head gasket? Also what thickness would you recommend bud?

 

Cometic is well known brand, some H-T sponsors sell them. Stock gasket thickness is basically .03" & I think cometic only makes one gasket size that's thinner than stock. I don't know what size it is, but if it's .02" that's good for .3 approx bump up in compression, if it's .015" that's around .5 in compression.

 

well i wanna go all motor of course and was wondering then i already have i/h/e with 310cc injectors and a walbro 255 fuel pump i wanna put an MSD ignition system also and was thinking about adding the skunk2 valve spring an retainer kit b4 i chip and dyno tune. let me know if anyone has done this or if its worth the upgrade b/c i raced and beat a 350Z and a G35 an was pretty impressed cuz i know they are low 14 sec cars

 

wtf

 

raising compression on a stock H22 with boltons will get quite a bit of power.

it was definitely noticable for me. i had .015 shaved from a head that was already just above disgard. no clearance issues, and it has been thousands of miles, and about 50 strip runs without a problem


just remember that if you remove material from the head, or get a thinner head gasket, your cam gears will be closer to your crank, so your timing will be a little off, (1 degree per 30 thousandths, so .5 degrees for .015)

not much, but almost enough to get cam gears (you'll have to advance them)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EGmikeH22 &raquo;</TD></TR><TR><TD CLASS="quote">raising compression on a stock H22 with boltons will get quite a bit of power.

it was definitely noticable for me. i had .015 shaved from a head that was already just above disgard. no clearance issues, and it has been thousands of miles, and about 50 strip runs without a problem


just remember that if you remove material from the head, or get a thinner head gasket, your cam gears will be closer to your crank, so your timing will be a little off, (1 degree per 30 thousandths, so .5 degrees for .015)

not much, but almost enough to get cam gears (you'll have to advance them)</TD></TR></TABLE>

I got a spare head I'm gonna put on while I'm having my orignial one serviced. Will milling the head .030 require me to get cam gears??(USDM c/r 10:1) If so what do you think the limit is before I need cam gears???

 

I just said .03 is going to be one degree.

you are going to be one degree off.

btw my machine shop suggested I go .005 under min thickness at the very most, and I went .015

.03 seems a little nuts, if you are on a JDM engine you'll be at ~11.8:1

 

But serriously WHERE can i get the head gasket? Ive been looking online they mostly stock thickness.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EOE &raquo;</TD></TR><TR><TD CLASS="quote">But serriously WHERE can i get the head gasket? Ive been looking online they mostly stock thickness.</TD></TR></TABLE>

use two. what could happen?

 

buy a sotck honda oem than take off 1 layer they are 3 layer gaskets you'll bump compression this way.

 

Is it safe to just remove a layer off your head gasket? Or to use 2 Headgaskets?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">use two. what could happen?</TD></TR></TABLE>

If I use two i will lower my compression, I am looking to increase it....

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by The_Sober &raquo;</TD></TR><TR><TD CLASS="quote">buy a sotck honda oem than take off 1 layer they are 3 layer gaskets you'll bump compression this way. </TD></TR></TABLE>

- Then I guess thats the best way of doing it...

 

When you say one degree off timing, which way is it (advance or retarding)?

Would the cam gears (both in/exh) have to be adjusted 1 degree to compensate the 0.030?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EGmikeH22 &raquo;</TD></TR><TR><TD CLASS="quote">I just said .03 is going to be one degree.

you are going to be one degree off.

btw my machine shop suggested I go .005 under min thickness at the very most, and I went .015

.03 seems a little nuts, if you are on a JDM engine you'll be at ~11.8:1</TD></TR></TABLE>