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

Jagdpanzer · 05-13-2014

Thanks Lee, nice to know where the thin areas are.

LGAFF · 05-13-2014

Man lots of typos in my original post.....

XfireZ51 · 05-13-2014

That coolant port is a PITA even w the 90-92 IH.

05-12-2014	#1
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	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 04:21 PM.

05-13-2014	#2
Jagdpanzer Join Date: Apr 2007 Location: Northern VA Posts: 2,651	Re: Porting 93-95 Injector Housing Thanks Lee, nice to know where the thin areas are. __________________ Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake

05-13-2014	#3
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: Porting 93-95 Injector Housing Man lots of typos in my original post..... __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

05-13-2014	#4
XfireZ51 Join Date: May 2007 Location: Chicagoland, IL Posts: 9,686	Re: Porting 93-95 Injector Housing That coolant port is a PITA even w the 90-92 IH.