Just noticed something...

[jamesA]

I'm kinda confused, i dunno. I was just looking at the engine reference section and I noticed something...

B16A 1595 168@7800 116@7300 10.4:1 81 77.4 dohc yes 2 1996-2000 Civic VTi
B16A2 1595 160@7600 111@7000 10.4:1 81 77.4 dohc yes 2 1999-2000 Civic Si

If the bore/stroke/displacement are the same, how are the power levels different even if only by that 8 hp/5 ft lbs? Would it be because the VTi has (I'm assuming) a slightly higher lift vtec lobe on it's camshafts? :unsure:

 

[NotUrAverage_Si]

piston dome size is a little different.

and yeah vtecsir1, you're right the compression ratio is a little different also which is most likely created by the difference in the dome size of the pistons.

 

[vtecsir1]

jdm pistons have a higher dome, it has higher compression by .2 that should read 10.2:1 for the us version plus they run a higher octane in japan.

the c speed comp calculator
http://www.c-speedracing.com/howto/compcalc/compcalc.php

 

[jamesA]

Originally posted by vtecsir1@Jul 6 2004, 12:57 AM
jdm pistons have a higher dome, it has higher compression by .2 that should read 10.2:1 for the us version plus they run a higher octane in japan.

the c speed comp calculator
http://www.c-speedracing.com/howto/compcalc/compcalc.php

so it is 10.2:1 compression on the a2...? <_<

 

[NotUrAverage_Si]

Originally posted by revolution8k+Jul 5 2004, 11:07 PM-->

vtecsir1

@Jul 6 2004, 12:57 AM
jdm pistons have a higher dome, it has higher compression by .2 that should read 10.2:1 for the us version plus they run a higher octane in japan.

the c speed comp calculator
http://www.c-speedracing.com/howto/compcalc/compcalc.php

so it is 10.2:1 compression on the a2...? <_<

yup.

 

[xj0hnx]

Yes

 

[E_SolSi]

isnt the cam profile slightly different as well??

 

[jamesA]

Originally posted by E_SolSi@Jul 6 2004, 01:34 AM
isnt the cam profile slightly different as well??

that's what I was asking.