how do you get more comp?

[crashandburn930]

im trying to do all the little things to get more compression out of my head? i know you can shave it, headgasket, valves, and i saw something on another thread about welding combustion chamber, what does that mean? im trying to do all the little things to the head without tearing into the block. ps its a h22a4.

[evil_demon_01]

Welding the CC means adding filler to the CC which reduces the volume, thus increasing compression.

Honestly the best way to increase compression is to replace the pistons with high comp pistons.
Adding welds to the head and changing headgaskets isn't really the best way to go about it.

[steelbluesleepR]

the best way is to get high comp pistons, everything else will only raise it MAYBE 0.1 points. and cost way more.

[bcjammerx]

ewe...welding the combustion chamber??? That is...not something I would ever put stock in.

[Onebaddcb7]

I heard of people taking out the middle layer from the head gasket to raise compression. Is that tru?

[deevergote]

ewe...welding the combustion chamber??? That is...not something I would ever put stock in.

It's very common in serious builds. It's not a hack tuner method, but a very sophisticated (and expensive) modification.

I heard of people taking out the middle layer from the head gasket to raise compression. Is that tru?

Modifying a head gasket is never a good idea. There are thinner gaskets on the market, but like shaving the head, changing the gasket thickness will do two things. 1) it will bring the valves closer to the pistons, and 2) it will change the cam timing.


The safest and easiest way to do it is to change the pistons. OP, you're avoiding "tearing into the block"... which means you want to build a performance engine using a 15 year old stock block? Not a very smart thing. You're going to put money into your head, and then send a piston crashing up into it.

Get some Mahle Gold Series pistons. They're not overly expensive, and they're made for the H22's FRM sleeves. Get some decent rods, and for added security, upgrade to ARP rod bolts.

[crashandburn930]

It's very common in serious builds. It's not a hack tuner method, but a very sophisticated (and expensive) modification.



Modifying a head gasket is never a good idea. There are thinner gaskets on the market, but like shaving the head, changing the gasket thickness will do two things. 1) it will bring the valves closer to the pistons, and 2) it will change the cam timing.


The safest and easiest way to do it is to change the pistons. OP, you're avoiding "tearing into the block"... which means you want to build a performance engine using a 15 year old stock block? Not a very smart thing. You're going to put money into your head, and then send a piston crashing up into it.

Get some Mahle Gold Series pistons. They're not overly expensive, and they're made for the H22's FRM sleeves. Get some decent rods, and for added security, upgrade to ARP rod bolts.

fresh 90 k motor just trying to do a few things for compression and i know with my f22 i did all the little things and got it up to 220 psi so i know it helped quite a bit. so about it only MAYBE only .02 is not correct. it helped alot and i only shaved the head .009 in and a ebay headgasket. so im trying to do all that with a h22 and spray it, not trying to have the same motor till im 60.

[deevergote]

Ok, then do what you want. You're the expert, pal! Good luck.

[quaidum]

fresh 90k motor

fresh


my 210k f22a6 in my coupe had 210 on all four cylinders and that was with nothing done(and when it got tore down there was no build up at the top of the cylinder walls before the deck)

you could have a good sealing motor or some carbon build up to create a whopping 220psi

[HappyGilmore]

fresh 90 k motor just trying to do a few things for compression and i know with my f22 i did all the little things and got it up to 220 psi so i know it helped quite a bit. so about it only MAYBE only .02 is not correct. it helped alot and i only shaved the head .009 in and a ebay headgasket. so im trying to do all that with a h22 and spray it, not trying to have the same motor till im 60.

I highly suggest what the others are telling is 99 percent right. I just now understanding how an eninge works and yes they are right. And the most inexpensive way is pistons, (correct me if i am wrong) cams, better valves. Just my soapbox

[steelbluesleepR]

I highly suggest what the others are telling is 99 percent right. I just now understanding how an eninge works and yes they are right. And the most inexpensive way is pistons, (correct me if i am wrong) cams, better valves. Just my soapbox

rob, cams and valves will not increase compression ratio, but yes they will help power. the only way to change compression ratio is to either change the stroke of the crank, or change the volume of the combustion chamber.

[deevergote]

Flat faced valves would have a small effect... but nothing significant.

[crashandburn930]

Ok, then do what you want. You're the expert, pal! Good luck.

if i claimed to be a expert i wouldn't be on here. just trying to get some compression without building my block. PAL!

[deevergote]

Whatever. I told you what you need to know, as did everyone else... you want to take the "easy" way, and you're going to fry your motor. So I wish you luck... I'm looking forward to saying "I told you so". That is, if you don't get yourself banned befoe it happens. It's a race!

[J3wman]

if i claimed to be a expert i wouldn't be on here. just trying to get some compression without building my block. PAL!

ur playing with fire. clearly youre a noob and youre messing with deev. rule 1 on cb7tuner is Deev is god. If you plan on keeping your login to this site id stop where u are be for deev gives you the . just say thanks for the advice, and if you choose not to follow it and blow your engine dont come crying to us and leave it at that.

everyone else was right. the cheapest and safest way is to go with pistons or else youre going to kiss your piston and valves.