Ive read over and over again about the compression ratio with CTR in a LSVtec.

I want to run a GSR head of course it will be built with 43mm ITB. But according to Omniman the compression ratio is too high for street use

lsvtec with gsr head and ctr pistons
head Gasket 2.8cc big vol= 495.6cc
piston dome vol. 6.3cc small vol= 37.2cc stock gsr/lsvtec=13.3
camber vol. 42cc
deck height .25mm 1.3cc
cyl vol. 458.4cc

Is this accurate?

According to the Compression Calculator my compression will be 12.4

so whats true?

 

12.27 according to http://www.c-speedracing.com/h...c.php

 

13.3 is right.. **** it just fill up with some C16 and your good to go!

 

READ THE THREAD STICKIED AT THE TOP OF THIS FORUM. I WOULD TRUST OMNIMAN OVER A COMPRESSION CALCULATOR. and yes its he's right 13.3:1. there are several things the compression calculator doesnt factor in which give you inaccurate data

to omniman

 

Omniman is correct. Most compression calculators dont take into account the PDH of CTR pistons.

For street you can use them, but make sure you have a great tune and run the highest octane gas you can. I would personally go with a lower C/R on the street.

 

can i get a thicker headgasket to drop the compression down a lil bit?

 

http://technet.ff-squad.com/cr-calculator.htm

check the compression for yourself

 

lol that is the gayest Compression Calculator ive ever seen

 

its pretty cool hahhaha i feel like a little kid again with them matching games

 

that **** is hella funny though!

 

it's goin to be 13.1:1 if they are oversize and the gsr head ... im doin the same thing and im doin it on 93 octane...im stupid for doin this as a dialy driver

 

Im gonna be running 95-96.. and 105 on race day.