OBX Install Minor Issues - ZR-1 Net Registry Forums

Shrek · 01-15-2012

Test fitting the headers today and only had two small issues.

1) Need a O2 sensor extension for the passenger side. Got one...Thanks Ted

2) #1 tube making contact with steering shaft. Need to dimple a tad!

View from the bottom.

View from the top.

Shrek · 01-16-2012

After a good nights sleep, I have a thought! Wonder if I can loosen the single nut on each motor mount perch and pry the motor over enough to clear it. Just need to see how much room I have between the passenger header and the frame. I seem to recall about a half inch while I was test fitting them yesterday.

VetteMed · 01-16-2012

Marc Haibeck sells O2 extensions for a reasonable price.

My Jeal headers contact the steering shaft. I improved (though did not cure) the situation by using a couple of alignment shims under the driver's side motor mount. Loosen the lower mount bolts, jack up driver's side, slip shims in, tighten bolts, drive car to let mounts settle.

I did not cure the issue; on right turns the shaft still rubs on the #1 primary tube. I plan to add another shim the next time I have the car up in the air again.

Shrek · 01-19-2012

Lifting was not an option! I dropped the angle braces and the mounts are all the way to the right in the slots, so no more adjustment that way. I was able to dimple the tube, well actually more of a crease than a dimple, and all is good.

secondchance · 01-19-2012

Quote:

Originally Posted by Shrek

Lifting was not an option! I dropped the angle braces and the mounts are all the way to the right in the slots, so no more adjustment that way. I was able to dimple the tube, well actually more of a crease than a dimple, and all is good.

Glad to to hear you got it sorted out. These cars must have some production variations. Interesting that mine bolted up w/ no rubbing against steering shaft.

VetteMed · 01-20-2012

Shrek, did you dimple the header tube while installed on the motor? Or did you remove and dimple it?

Shrek · 01-20-2012

Quote:

Originally Posted by VetteMed

Shrek, did you dimple the header tube while installed on the motor? Or did you remove and dimple it?

I marked it, removed it, then creased it using a press brake at the shop where I work.

TCurtner · 01-21-2012

Quote:

Originally Posted by Shrek

I marked it, removed it, then creased it using a press brake at the shop where I work.

So...how do they perform? I want to do the same for my '91 Z.

Shrek · 01-21-2012

Quote:

Originally Posted by TCurtner

So...how do they perform? I want to do the same for my '91 Z.

Won't know for a couple of weeks. Soon as it's back on the ground and running, we're going straight to the dyno. I'll post my impressions then!

sammy · 01-21-2012

did you also change the exhaust when you did the headers ? do you have before dyno runs so you can see the improvement ?

01-16-2012	#2
Shrek Join Date: Sep 2010 Location: Currituck, NC Posts: 246	Re: OBX Install Minor Issues After a good nights sleep, I have a thought! Wonder if I can loosen the single nut on each motor mount perch and pry the motor over enough to clear it. Just need to see how much room I have between the passenger header and the frame. I seem to recall about a half inch while I was test fitting them yesterday.

01-16-2012	#3
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,828	Re: OBX Install Minor Issues Marc Haibeck sells O2 extensions for a reasonable price. My Jeal headers contact the steering shaft. I improved (though did not cure) the situation by using a couple of alignment shims under the driver's side motor mount. Loosen the lower mount bolts, jack up driver's side, slip shims in, tighten bolts, drive car to let mounts settle. I did not cure the issue; on right turns the shaft still rubs on the #1 primary tube. I plan to add another shim the next time I have the car up in the air again. __________________ 2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold)

01-19-2012	#4
Shrek Join Date: Sep 2010 Location: Currituck, NC Posts: 246	Re: OBX Install Minor Issues Lifting was not an option! I dropped the angle braces and the mounts are all the way to the right in the slots, so no more adjustment that way. I was able to dimple the tube, well actually more of a crease than a dimple, and all is good.

01-20-2012	#6
VetteMed Join Date: Mar 2009 Location: Orlando, FL Posts: 1,828	Re: OBX Install Minor Issues Shrek, did you dimple the header tube while installed on the motor? Or did you remove and dimple it? __________________ 2004 Z06/Z16 LeMans Commemorative Edition 1991 ZR-1 #302 White/Gray (sold) 1991 ZR-1 #1147 Red/Saddle (sold)

01-21-2012	#10
sammy Join Date: Jun 2010 Location: back in lone pine Posts: 591	Re: OBX Install Minor Issues did you also change the exhaust when you did the headers ? do you have before dyno runs so you can see the improvement ?

01-15-2012	#1
Shrek Join Date: Sep 2010 Location: Currituck, NC Posts: 246	OBX Install Minor Issues Test fitting the headers today and only had two small issues. 1) Need a O2 sensor extension for the passenger side. Got one...Thanks Ted 2) #1 tube making contact with steering shaft. Need to dimple a tad! View from the bottom. View from the top. Last edited by Shrek; 01-21-2012 at 08:30 PM.