With the b16 cams i get this:
Your engine summary is as follows: Bore 3.188 inches, stroke 3.433 inches, rod c-c length 5.429 inches, with a static compression ratio of 11 :1. Your camshaft specifications call for an inlet valve closing of 40 degrees ABDC (after bottom dead center).
Your chamber volume is 44.91 cc's. With this camshaft your dynamic, or effective stroke is 3.14 inches. Your dynamic compression ratio is 10.09 :1 corrected for cam timing, altitude, and rod length. Your dynamic cranking pressure, corrected for cam timing, rod length and altitude is 214.09 PSI. Your dynamic boost compression ratio, reflecting static c.r., cam timing, altitude, and 0 PSI is 10.09 :1.
With type-r cams i get this:
your engine summary is as follows: Bore 3.188 inches, stroke 3.433 inches, rod c-c length 5.429 inches, with a static compression ratio of 11 :1. Your camshaft specifications call for an inlet valve closing of 45 degrees ABDC (after bottom dead center).
Your chamber volume is 44.91 cc's. With this camshaft your dynamic, or effective stroke is 3.07 inches. Your dynamic compression ratio is 9.88 :1 corrected for cam timing, altitude, and rod length. Your dynamic cranking pressure, corrected for cam timing, rod length and altitude is 208.45 PSI. Your dynamic boost compression ratio, reflecting static c.r., cam timing, altitude, and 0 PSI is 9.88 :1.
I got the 40 and 45 values from here
link
I dont know if they are correct but i used those values for the Inlet Valve Closes ABDC.
I read thayou want your cranking pressure to be greater or the same as stock.
With the b16 cams i get a cranking pressure of 214 psi and a dynamic cr of 10.09 :1.
With this set up i get a greater cr than a jdm type r. My cranking pressure also increases by about 3.5%
With the itr cams i get a cranking pressure of 208 psi and a dynamic cr of 9.88 :1.
This set-up is almost identical to the jdm itr. Cranking pressure and the cr stay about the same.
In the same article i linked prior to this it says a 5% increase, is significant, so i suppose the 3.5% increase in cranking pressure is moderate.
So what i get from this is that if i get itr cams with itr pistons, i would have a engine pretty similiar to the jdm itr, in terms of static compression, dynamic compression, and cranking pressure, am i correct?
By staying with the stock b16 cams, my cranking pressure, and dynamic compression increase, but my static compression will remain at about 11:1.
I am not sure what the cranking pressure and dynamic compression actually affect, but which set up, with the information i provided, would suit me the best?