'96 D1 frankenaust
#1
'96 D1 frankenaust
I recently traded for a '96 D1, but didn't crawl under (I know, I know!) and now see that from the manifolds back is completely bubba'd. No cats, homemade Y-pipe, etc. There are O2 sensors. It seems to run okay, and sounds alright. Do I need to be aware of any potential problems? No emission inspections where I live. I crawled under to look, only because the po has the exhaust exiting under the driver's side rear passenger's door, and I want to take it back to the rear.
#2
#3
#4
#5
#6
I assume people delete cats after they are out, so as not to pay for new ones. I have not heard of any gain in performance or mileage. I think the the computer gets fooled with spacing or something like that, not sure.
found=https://landroverforums.com/forum/of...ll-work-28993/
found=https://landroverforums.com/forum/of...ll-work-28993/
Last edited by dusty1; 11-20-2013 at 07:10 AM. Reason: link found
#7
Could be true. I have heard many people, though, claim better performance after removing the cats, which are more restrictive than a system without them. How much gain? I can't say I've ever seen dyno results. It does make since though. Unrestricted flow in and out results in hp gain, which is why there are aftermarket intake and exhaust systems. I don't know, though, how much gain you would get by only adding a high flow airfilter and removing the cats.
#8
Could be true. I have heard many people, though, claim better performance after removing the cats, which are more restrictive than a system without them. How much gain? I can't say I've ever seen dyno results. It does make since though. Unrestricted flow in and out results in hp gain, which is why there are aftermarket intake and exhaust systems. I don't know, though, how much gain you would get by only adding a high flow airfilter and removing the cats.
High flow catalytic converters or no catalytic converters will help very marginally. A straight through muffler design like a Borla or Glasspack (NOT THE LOUVERED KIND) will help marginally. With that said, it is barely noticeable, and the gains are in the top end. You will actually lose some bottom end. Well, atleast until you add a K&N or Green Pod filter and a custom smoother intake. I used a couple of 3.25" turbocharger couplings and a 9" length of 3.25" aluminum pipe for mine. That's where the bolt on change is noticed. I have not tried the intake without the exhaust changes, but I doubt it would help as much. I am currently having a port and polish done and that should show even more increases.
So, in short, exhaust alone helps virtually none. You will also need intake work to have a noticeable difference.
PS: If you make a custom intake, you will have to make the MAF wires longer.
#9
#10