Question about Rear Catalytic Converters on XJS V12.
#1
Question about Rear Catalytic Converters on XJS V12.
Several weeks ago my 91 XJS V12 suffered the classic Marelli Ignition failure. In addition to destroying my cap, rotor, wires, coils and front catalytic converters, it apparently also melted the rear ones too. My question is: Can the rear ones be eliminated? Being a 1991, it's emissions test exempt in Massachusetts. And if eliminated, will it run better with less restriction? Insurance is covering the repairs.
#2
Join Date: Nov 2013
Location: Breaux Bridge, Louisiana, US
Posts: 656
Received 170 Likes
on
134 Posts
You could knock out the remaining converter material and reinstall the empty shell.
Ort you could do a search to find used converters. Since it is always the right rear that melts the worst, I ended up gutting my right rear after a Marelli failure. I have not shopped for a used one yet and I am getting tired of buying replacements at several hundred dollars each time.
Ort you could do a search to find used converters. Since it is always the right rear that melts the worst, I ended up gutting my right rear after a Marelli failure. I have not shopped for a used one yet and I am getting tired of buying replacements at several hundred dollars each time.
#3
#4
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 24,895
Received 10,952 Likes
on
7,196 Posts
Yes. Nothing bad will happen, other then the air being a little dirtier
Being a 1991, it's emissions test exempt in Massachusetts.
If you go to a muffler shop to have them removed you *might* run into resistance, though. Massachusetts might not care but, technically speaking, it's a violation of federal law to remove the converters. Some exhaust shops worry about this more than others.
And if eliminated, will it run better with less restriction?
Cheers
DD
#5
I had a V12 sedan that I drove with and without cats. Absolutely no difference in terms subjective performance. I didn't measure the 0-60 times before and after, but by the seat of the pants meter there was no difference between with cats or without.
Thread
Thread Starter
Forum
Replies
Last Post
snooktarpon
S-Type / S type R Supercharged V8 ( X200 )
14
04-20-2008 09:53 AM
Driver
PRIVATE For Sale / Trade or Buy Classifieds
3
11-05-2007 08:37 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)