Hi guys !
I just done swap B17a1 to my 93 Si. I'm using 93 Gs-R ECU , vtec kicked fine but there's little problem about red line. On the Si cluster's redline was 7200 rpm, but when I redline , the fuel cut off at 6800 rpm, why is that ? When I used to have my 93 gs-r, same ECU and I redline up to 8200 rpm . Is anyone know how is this happened ?

 

maybe tach is off my teg i thoguh it would cut off at 8k but then when i put the afc in it showed 7k something where fuel would cut off so it might be the tach

 

check your miles per hour at the cut off. If the tach is wrong you should still be at about 40 mph by the end of first. I don't know the exact mph for your tranny, but if someone else knows go ahead and post.