hey there does anyone by any chance know the size (volume) of our combustion chamber ? I have to figure this out for an assignment I am doing and figured it would be nice for everyone to know as well. I have searched and searched and asked a few places but i cant get a straight answer. I even went on scions web site and chatted with one of the representatives and asked him the same ? and he told me he would get back to me. this is how our convo went.
GVan: Hi, my name is GVan. How may I help you?
jose varela: i had a few questions about the scion tc
GVan: Sure, how may I help?
jose varela: internal engine questions
GVan: I can try. I wouldn't be able to give specific technical advise or information as we are not a technical center. This is when the dealers come into play.
jose varela: I was trying to figure out what the volume of the combustion chamber was on the scion tc ?
jose varela: cylinder head for the 2azfe motor
GVan: Let me see if I can get that information for you.
GVan: I'll be right with you after I try and get this information for you.
jose varela: ok thanks a lot
jose varela: i would appreciate it
GVan: The combustion chamber information is 2362 cc or 144.1 cu. in.
GVan: The cylinder head is aluminum.
GVan: This information is in the back of the owner's manual in case you'd like to look this information up.
jose varela: no thats the overall engine displacement I was trying to find the displacement of the combustion chamber itself
GVan: I see. This is the information I was given. Let me go back and ask.
jose varela: k sounds good
jose varela: also how about head gasket thickness
GVan: Regarding the combustion chamber, I will need to take your information and get back to you. This is something that isn't published and we will need to contact Japan.
jose varela: ok sounds good.my email adress is scikotictc232@yahoo.com
GVan: I will need to set up a case file for you. Are you the registered owner? What is your mailing address and you day time phone #?
GVan: I will also need your vin#.
jose varela: why would you need those ? just curious ?
GVan: To document your information so we can call you back. We need to document every inquiry.
jose varela: i dont have my vin with me though as im in school
jose varela: but i am the registered owner
GVan: Ok, one moment.
GVan: I will provide you with a reference #.
GVan: What is your mailing address?
jose varela:
GVan: What is your phone # so we can call you back?
jose varela: 509
GVan: Your case # is . We will contact you within 3 business days by phone. If you need to call us please contact us at 866-707-2466 or you can chat with us.
jose varela: thanks

i called the service at my local dealer and they couldn't answer it either or direct me in the right path. im sure someone has to know since there are quite a bit of guys that have built motors.

 

my guess would be 2,362cc divided by 4 = 590.5

 

590.5 cc ? does that seem right to you ? i don't think its that easy

 

and to convert that to liters just move the decimal 3 spaces to the left.

 

how could it not be? if our engine displacement is 2'362cc, and has four cylinders of equal size. then that must be correct.

 

thats just displacement of each cylinder. I jumped on alldata.com and found that the Compression pressure is 1,300 kPa (13.3 kgf/cm2, 189 psi). Im sure you could use that to figure out the combustion chamber volume since you know the engine displacment and atmospheric pressure is 14.7 psi. Also you know the compression ratio is 9.6 to 1

 

im talking bout cylinder head though. i know how to get the displacement by bore and stroke but im trying to figure out the cc of our cylinder heads combustion chamber.

 

gotcha. you mean when the piston is at top dead center. good luck with that.

 

ya let me see if i can figure it out.

 

i dont think im getting it. do you know what it is ?

 

I would guess 57.7 cc but that is only a guess. If you could get the deck height and the thickness of the the head gasket then you could calculate it. I used this site

http://www.turbofast.com.au/Tfcomp.html

I guessed a deck height of .03 and a head gasket of .04

 

i got 63.5 head volume. does that sound right ? i can ask my instructor tomorrow i guess but does anyone know the formula ?

 

Why did you post this two places?


I have a friend that works at a Toyota dealership he said he would ask a tech and get back to me soon. Hopefully I can have this for you soon.

 

thanks a lot. i only posted once, but asked in a few others. thanks a lot man i appreciate it. i cant believe its that hard to figure this out.

 

that sounds about right. i really dont know the formula to get the caculations.
but form building a bunch of chevy sb that there heads range from 50-80cc

 

It's about 39cc +- .5 cc. Of course that will change if you have aftermarket valves, ported combustion chamber and depending on if the valve face is flat or dish, that will also change the combustion chamber volume.

Keep in mind, the area above the top ring, below the piston crown, the deck clearance/height, piston dome CC & gasket thickness also affects the overall C/R of the motor. These parameter must all be taken into consideration when spec'n a custom compression ratio piston.

MrC

 

^^well said

 

How much would need to be taken off a stock TC head to get a .5 bump in compression?

Thanks,

Jeremy

 

im talking bout strictly a stock motor. head gasket thickness .027 ? what do you mean area above the top ring, below the piston crown ? you know the cc of our pistons relief ? thanks a lot highly appreciate it.

 

40.2cc is what i came up with.