Porting 93-95 Injector Housing - ZR-1 Net Registry Forums

LGAFF · 05-12-2014

We all know the 93-95 injector housings are not as robust as the 90-92 when it comes to porting. But one area in particular you should watch out for are the primary runners next to the coolant outlets.

While you can feel the thickness of the runner easily, as the runner reaches the base of the injector housing it kicks in...lending itself to porting through or even worse porting thin and finding out the hard way.

Attached is a pic of the area....the weak spot is about as wide as a paperclip, but I would advise once getting toward the base you cease removing material and smooth out the port. Most likely you can get to 34mm although its not the 36 you can get to in the other runnners.... not worth the headache of going through

The area of the weak point is circled below

05-12-2014	#1
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,194	Porting 93-95 Injector Housing We all know the 93-95 injector housings are not as robust as the 90-92 when it comes to porting. But one area in particular you should watch out for are the primary runners next to the coolant outlets. While you can feel the thickness of the runner easily, as the runner reaches the base of the injector housing it kicks in...lending itself to porting through or even worse porting thin and finding out the hard way. Attached is a pic of the area....the weak spot is about as wide as a paperclip, but I would advise once getting toward the base you cease removing material and smooth out the port. Most likely you can get to 34mm although its not the 36 you can get to in the other runnners.... not worth the headache of going through The area of the weak point is circled below __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359 Last edited by LGAFF; 05-13-2014 at 05:21 PM.