hi

let's say there's a ls/vtec with b18a1 block + b18c1 head,intake,etc.
just the block,crank and rods are from b18a1, other stuff from b18c1.

and on the other hand, we have a pure GSR b18c1.

which one reaches the TDC quicker?

If there's the stock GSR map on both motors,
In what way should I change the ignition timings to make the LS behave just the same as GSR ?

 

Which ever one is started first.
This question makes no sense and has little value. What ever you are trying to do is far beyond your comprehension at this point. Fortunately the web is chock full of info. Google my friend....

 

rephrase what your asking i have no idea what your trying to do.