Rebuilding a KA24 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*SaintlyCharBoy* · 09-17-2002, 06:38 PM

first and foremost you need to figure out what you want.
a rebuild for a turbo motor does not follow the same route as one for a N/A application.
i wouldn't personally call a cam change part of a rebuild... but...
the cam profiles that you look for with a turbo setup are different than those for N/A, all i know is that with a turbo high overlap is a bad thing (maybe someone can help me out here)

the biggest difference that i can think of right now, is that in an NA app, you would tend to raise the compression ratio of the motor to up output, whereas in a forced induction app, you would lower the CR as the forced induction system raises the effective CR

The KA is pretty much maxed out size wise, nissan bored and stroked the block almost to hte limit, iirc the limit for an overbore is .040
i dunno about the stroke

one thing you might consider, is working on other systems, ie work on suspension, brakes etc. in case your motor pov changes, or you hit some serious $$$

good luck <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt='

'>

09-17-2002, 06:38 PM	#1
SaintlyCharBoy Premium Member Join Date: Jan 2002 Location: Bow, NH Age: 43 Posts: 849 Trader Rating: (1) Feedback Score: 1 reviews	first and foremost you need to figure out what you want. a rebuild for a turbo motor does not follow the same route as one for a N/A application. i wouldn't personally call a cam change part of a rebuild... but... the cam profiles that you look for with a turbo setup are different than those for N/A, all i know is that with a turbo high overlap is a bad thing (maybe someone can help me out here) the biggest difference that i can think of right now, is that in an NA app, you would tend to raise the compression ratio of the motor to up output, whereas in a forced induction app, you would lower the CR as the forced induction system raises the effective CR The KA is pretty much maxed out size wise, nissan bored and stroked the block almost to hte limit, iirc the limit for an overbore is .040 i dunno about the stroke one thing you might consider, is working on other systems, ie work on suspension, brakes etc. in case your motor pov changes, or you hit some serious $$$ good luck <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/biggrin.gif" border="0" valign="absmiddle" alt=''> __________________ 92 vert - KADE + VH41 + GM MA5 = too many parts in the garage 95 base - retired