head gasket


lumek4

lumek4

Active Member
Joined
Oct 29, 2007
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thing is im fitting my ctr cams into my b16a2 next week. through info i have picked up i know i need to run a we bit more compression if i want more out the cams. and if im rite the b16a2 has a shorter stroke than the b16b witch gives me more room to avoid valve contact with the piston.

now what would be the best way to go around this getting the cr up. would i be better gettin a thin 2 layer head gasket or sticking with a honda one and getting the head mild (skimmed). or 2 layer and a little bit miled off the head

thanks Callum
 
fit flat bottom valves! thall bump your compression theyre lighter and upgrade your valve-springs/retainers.!
 
lumek4 said:
thing is im fitting my ctr cams into my b16a2 next week. through info i have picked up i know i need to run a we bit more compression if i want more out the cams. and if im rite the b16a2 has a shorter stroke than the b16b witch gives me more room to avoid valve contact with the piston.

now what would be the best way to go around this getting the cr up. would i be better gettin a thin 2 layer head gasket or sticking with a honda one and getting the head mild (skimmed). or 2 layer and a little bit miled off the head

thanks Callum
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both b16a and b16b have the same stroke which is 77.4mm the best way to change compression is by swapping pistons, but the easiest way is to get a thinner HG or mill the head, either option is up to you, it all comes down to cost and time. are you upgrading springs and retainers too?


EK9turbo said:
fit flat bottom valves! thall bump your compression theyre lighter and upgrade your valve-springs/retainers.!
Click to expand...

those things affect flow, there is a reason all OEM's have a dish in there valve, i would not recomend those to anyone...
 
blinx9900 said:
both b16a and b16b have the same stroke which is 77.4mm the best way to change compression is by swapping pistons, but the easiest way is to get a thinner HG or mill the head, either option is up to you, it all comes down to cost and time. are you upgrading springs and retainers too?




those things affect flow, there is a reason all OEM's have a dish in there valve, i would not recomend those to anyone...
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thanks very much blinx.

i have got ctr v/springs and retainers to match the cams out of the same engine.

the head is getting gas flowed to. so at the same time i can get the head milled. how far can u mill the head blinx
 
lumek4 said:
thanks very much blinx.

i have got ctr v/springs and retainers to match the cams out of the same engine.

the head is getting gas flowed to. so at the same time i can get the head milled. how far can u mill the head blinx
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thats good that you got the matching vavletrain, as far as milling its something the machine shop does, they have a special machine (milling machine) that does it, it just takes a small amount of metal off the top, its real purpose is to resurface the head, but you can take more metal off to raise compression.

im not a big fan of this because you cant go backwards but it is cheaper than taking your motor out and buying new pistons.

thin head gasket will bring you up to ~10.7 if you mill the head .020" it will bring you up to about 11.35 if your engine has the japanese p30 pistons, if you have the USDM PR3 pistons your compression will be (with head milling and a thin hg) 11.1
 
adee-ek4 said:
whats a ek4 vti . i proberly sound stupid
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if your asking which engine came in the EK4 vti im not sure actually, im only familiar with the USDM and JDM engines, perhaps someone can chime in with info on the UKDM engines. im gonna pm manos cause i think he has one...
 
ye thats what i dont like about milling 2 the fact that once its off there is no going back.

the only thing is over here in scotland is the cost to tune cars. to get the head gas flowed and milled over here will work out at about us $1000-1100 thats before timing belt cams gaskets so cost is a big thing here.

so what cr do u need 2 run the ctr cams at im sure it is 10.8 is it not so i think i will just get the head milled very slight as dont want to go down that road.

so what ecu will i run ek9 or the one for the b16a2

thanks ever so much again blinx
 
i no the b16a2 came in the ek4 vti but i dont know what the difference is between the jdm and usdm
 
the b16b has a cr of 10.76 so i reckon it would be best to run that you could do that by getting a single layer gasket
 
lumek4 said:
ye thats what i dont like about milling 2 the fact that once its off there is no going back.

the only thing is over here in scotland is the cost to tune cars. to get the head gas flowed and milled over here will work out at about us $1000-1100 thats before timing belt cams gaskets so cost is a big thing here.

so what cr do u need 2 run the ctr cams at im sure it is 10.8 is it not so i think i will just get the head milled very slight as dont want to go down that road.

so what ecu will i run ek9 or the one for the b16a2

thanks ever so much again blinx
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:shocked::shocked::shocked: thats TOO EXPENSIVE!! honestly save yourself the money, forget about having the head gassed and milled if it cost that much, the benefit is minimal, i would just run the thin headgasket and be finished, there are plenty people in USA who run the CTR cams with 10.4 compression, with the thin headgasket you will be at either 10.5 or 10.7 which is plenty in my opinion, its not worth it to spend $1100 just to raise the compression a little more, thats an INSANE price, i think you could buy forged high compression pistons and have them fitted for less? have you looked into that? or even just use the B16B pistons with the stock headgasket and you will be at 11.9CR :naughty::nerv: you can find the b16b pistons on ebay with rings for about $200 USD. forged units are about $450
 
adee-ek4 said:
the b16b has a cr of 10.76 so i reckon it would be best to run that you could do that by getting a single layer gasket
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hmm not to sure about that i dont think they will seal that well as there wont be that much material to compress for a good seal. got to remember its going to be reving somewhere about 8400rpm
 
and if that 11.9 is too high for your liking you can just run a cometic .050 headgasket and you'll be at 11.0 which is good and a little bit safer. i run the cometic .050 headgasket on my car and all our customers have them too making 300-750whp!
 
i no what you mean i am sure there will be some on here thats using a single layer gasket. ask and see if there is anybody and what the seal was like
 
blinx9900 said:
and if that 11.9 is too high for your liking you can just run a cometic .050 headgasket and you'll be at 11.0 which is good and a little bit safer. i run the cometic .050 headgasket on my car and all our customers have them too making 300-750whp!
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ye dont really want to go over 11.0 so what make of hg is this how much and where can i get one from. u say u use one so i asume they work well
 
adee-ek4 said:
i no what you mean i am sure there will be some on here thats using a single layer gasket. ask and see if there is anybody and what the seal was like
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the longest i ever heard of anybody having a single layer HG was 40 thousand miles, but most people blow them in as little as 10 thousand miles.

lumek4 said:
ye dont really want to go over 11.0 so what make of hg is this how much and where can i get one from. u say u use one so i asume they work well
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i use one as well as all my old customers and some of them make 750whp so yes they are very reliable, the name of the company is cometic.
 
blinx9900 said:
if your asking which engine came in the EK4 vti im not sure actually, im only familiar with the USDM and JDM engines, perhaps someone can chime in with info on the UKDM engines. im gonna pm manos cause i think he has one...
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Manos has a JDM EK9 carrying a B16B......:D and Cyprus is full of JDM stuff cuz of our traffic system (similar to UK). Not too much hassle to import stuff from Japan.

Blinx, my knowledge says that EK4 is the JDM SiR(can also be said Vti) that carries either a B16A(160 hp) or a B16A2(170 hp) isn't it true? :nerv:

Going back further, we meet JDM CRX SiR carrying again a B16A. I hope I'm not messing things up!
 
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