okay you may have read some of my other post recently trying to hunt some missing power problems. well tonight i may have found it. i am not sure how acurate averything is but i am surely confused and pissed.

i have a fully built h22 and i measured evrything this time around, (i spun a bearing and i am starting over again). i measured piston to deck clearance at .003". head gasket thickness at .030" i got the 89mm shelf rollerwaves. larry said my compression ratio should be at 12.49 to one with a stock head. my chambers were done and they measured in at 65cc.

i went to http://www.c-speedracing.com to check my ratio and ill be damned according to them i am at 10.49. my compression test before i took the motor apart was 225. larry said it should be at 290 or so. 225 lookes good for 10.5 not 12.5. larry said the pistons were 11cc dome. now i am not sure if he knew i was 89 not 87. he said 89 were alot higher than 87.

anyone use 89 rollerwaves and what is your compression test showing you? ami missing something way the **** off or what?

my set up is p&p head 89 mm rollerwaves, web cams 474 lift and 260 duration advertised, twm induction 50mm t-bodies and crank knife edged. aem ems only put down 205. and no its not the tuner.

any suggestions? did any one actually cc there 89 mm roller waves?

 

I plugged in 89mm pistons, 95mm stroke, .030 head gasket, plus 11cc on the pistons and 65cc on the combustion chamber with zero deck height and came up with 11-1 c/r
Did I use the wrong stroke for the H22?
The problem as I see it is the 65cc size of the combustion chamber. That is huge and sounds like a bad number. I'm just guessing as I don't know the H heads but they can't be 50% larger than the b head. Can they?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote">I plugged in 89mm pistons, 95mm stroke, .030 head gasket, plus 11cc on the pistons and 65cc on the combustion chamber with zero deck height and came up with 11-1 c/r
Did I use the wrong stroke for the H22?
The problem as I see it is the 65cc size of the combustion chamber. That is huge and sounds like a bad number. I'm just guessing as I don't know the H heads but they can't be 50% larger than the b head. Can they?</TD></TR></TABLE>

U put in the wrong stroke #. It's a 90.7 stroke.

I put in those numbers aswell and i to got 10.5 compression. Your combustion chamber is pretty big, standard size h22 heads are 53.8cc. When i put in 53.8cc in it came out to 12.75.1 compression.


Modified by SpdFrk at 3:45 AM 12/23/2003

 

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

U put in the wrong stroke #. It's a 90.7 stroke.

I put the those number and i to got 10.5 compression. Your combustion chamber is pretty big, standard size h22 heads are 53.8cc. When i put in 53.8cc in it came out to 12.75.1 compression. </TD></TR></TABLE>That is where Larry would have gotten is compression ratio numbers then.
Is it the H23 that has the 95mm stroke? I should know this stuff

 

i put 90.7 in i have the repair manual in. i cc'ed the head tonight. i dont ahve a kit i used a syringe though. it cant be that far off. my chambers were done thats why it is a lot bigger. try again. .003 deck clearance, .030 head gasket, larry said 11cc dome, 65 cc head, 89 mm head gasket. 10.5 am i missing something?

edit
so do i throw the head away to raise my compression? or what?

 

As spdfrk said, it works with the stock h22 combustion chamber size. Perhaps you can mill the head slightly to get the cc size down.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by earl &raquo;</TD></TR><TR><TD CLASS="quote">That is where Larry would have gotten is compression ratio numbers then.
Is it the H23 that has the 95mm stroke? I should know this stuff </TD></TR></TABLE>

Yes the h23 has the 95mm stroke.

meaneg by putting a stock h22 head on the compression should be in the 12.5 range or u could do what earl said.

 

You could have the combustion chambers welded...

 

hiow much does that usually run
?

 

89mm bore
90.7mm stroke
53.3cc head
11cc dome
.030 gasket
.003 deck

I got 12.875461136099195

89mm bore
90.7mm stroke
53.3cc head
11cc dome
.030 gasket
.013 deck

I got 12.493236006113221

 

yup my head it fucked. i will contact the porter and let him explain himself. somebody owes me an explanation and some money i figure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by meanEG &raquo;</TD></TR><TR><TD CLASS="quote">hiow much does that usually run
?</TD></TR></TABLE>

It is not cheap. Some guys won't do it without removing the seats (they believe that there will be problems down the road) , and it runs $600 ++. Talk to Brad (Max CFM) and get his input.

 

did he open up the chambers to match the bore? Ive heard of a few people doing this here and there, it was really popular a couple of years ago for some reason. I never understood why

 

no i compared it to a head i have here i bought for the rockers and if you look betwen the valves on the side of the chamber there is a **** load missing there.. welli am not going to do a ny welding here. guess i will do my other head now. doh... any one have personal experiance with head games?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Altered &raquo;</TD></TR><TR><TD CLASS="quote">did he open up the chambers to match the bore? Ive heard of a few people doing this here and there, it was really popular a couple of years ago for some reason. I never understood why</TD></TR></TABLE>

Alot of domestic guys do this. It has something to do with more free-flow and improving the shape/wall of the c.c. so that it stabilizes the gas as it enters the c.c.

 

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

Alot of domestic guys do this. It has something to do with more free-flow and improving the shape/wall of the c.c. so that it stabilizes the gas as it enters the c.c.</TD></TR></TABLE>

Yeah but your loosing a ton of compression that way, youd have to run a huge dome to regain compression. I can see it being ok for a FI aplication but not for NA.

 

you create hot spots in the cylinder by having material on the head stick "in to the bore" hence detonation on high comp aps

 

I'm assuming you're not on stock sleeves?

Sell your head, buy a stock one, make a few bucks.

 

i am going to see if someone else can measure it better than me. i find it hard to believe that i am that far off. my psi iin compressioin test does comply with the findings though.... huh

 

clay check your piston-to-valve clearances, and try to account for the amount that the valves will be farther 'outboard' toward the cylinder walls (and valve reliefs) for the amount which you need to mill the head and deck the block for your desired CR. just make sure that you also account for rod stretch at higher rpm. the tighter the quench you can run for any given compression without the pistons hitting the valves, the more power you'll make, and you'll reduce the chance of detonation.

 

I CAN ONLY MILL HEAD .023. .003 PISTON TO DECK, .030 HEAD GASKET AND .030 IN THE QUECHPAD. LEAVE .040 FOR ROD STRETCH AND HEAT EXPANSION LEAVES ME .030

 

AND IT ONLY RAISES IT FROM 11.2 TO 11.8. I MADE A MISTAKE I THINK. MY CC MAY ONLY BE 62 CC. I CALCULATED MY SYRINIGE. SO TRY IT AGAIN IN THE COMP. CALC.

 

measured it again with another tool. got more realalistic readings this time around it is 56.6. much better. dropped it down to 12.0. mill the head .020 and its back up to 12.8:1. just perfect.... thanks for the help fellas.

 

hit up satan_srv i know hes using 89mm rollerwaves