heatwrap the cat??????

1. marcusd Saxperience Post Whore Joined: Jan 2009 warrington Posts: 7551 posi blue mk2 2003 vtr

   #1 30th June 2011, 18:36

   have the janspeed 4-2-1 with sports cat and wanna know if its ok to wrap the sports cat or weather to leave it un wrapped?
2. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #2 30th June 2011, 18:57

   Cats work best hot but (and I'm only assuming here) that they are designed to work in a set temperature range. Heat wrap is going to keep the heat in and might push it above designed limits. Manifolds are generally made of thicker metal than the cats too so I reckon wrapping the cat would cause premature metal fatigue/cracking of it
3. Gabbastard Saxperience Post Whore Joined: Dec 2002 United Kingdom Posts: 8390

   #3 30th June 2011, 18:59

   i say wrap it, emissions will never be an issue again.
4. marcusd Saxperience Post Whore Joined: Jan 2009 warrington Posts: 7551 posi blue mk2 2003 vtr

   #4 30th June 2011, 19:03

   anyone else? kinda hit n miss here
5. user_35090 Established Member Joined: Jun 2009 west mids (dudley) Posts: 1201 cammed 106 flatty

   #5 30th June 2011, 19:15

   heat wrap will not give any noticeable performance gains. its MAINLY to keep bay temps down. the cat is under the saxo unless you own a mk2 which if you do then yes i would wrap the entire manifold+cat as the cat is in the mani. really no point if its under the car.
   
   EDIT: god im blind. didnt read first post id say wrap it dude.
6. user_38022 Infrequent Poster Joined: Oct 2009 Posts: 239 106 GTI

   #6 30th June 2011, 19:18

   id say...remove the cat. wrap the de-cat pipe.
7. user_35090 Established Member Joined: Jun 2009 west mids (dudley) Posts: 1201 cammed 106 flatty

   #7 30th June 2011, 19:18

   Quote:

   Originally Posted by martyno id say...remove the cat. wrap the de-cat pipe.

   even better
8. marcusd Saxperience Post Whore Joined: Jan 2009 warrington Posts: 7551 posi blue mk2 2003 vtr

   #8 30th June 2011, 20:39

   its mk2 and cat in mani. not de catting it as can;t be arsed to swap for mot's.
   
   so to sum up wrapping the whole lot ain;t gonna damage cat.
   this isn;t for performance gains its just to neaten it up a bit as the extreme high temp paint won;t stay on.
9. xsi16v Regular Poster Joined: Jan 2006 Ilkeston, Derbyshire Posts: 469 374 bhp Supercharged 205 GTI, Passat Estate

   #9 1st July 2011, 09:00

   no point in wrapping any part of the exhaust thats under the car. Hot air from around the exhaust will be moved with air flow out the back. It will be f*cked within months aswell thanks to speed bumps, dirt and wet weather!
10. marcusd Saxperience Post Whore Joined: Jan 2009 warrington Posts: 7551 posi blue mk2 2003 vtr

    #10 1st July 2011, 13:09

    Quote:

    Originally Posted by xsi16v no point in wrapping any part of the exhaust thats under the car. Hot air from around the exhaust will be moved with air flow out the back. It will be f*cked within months aswell thanks to speed bumps, dirt and wet weather!

    wrapping the manifold
11. Manu Saxperience Addict Joined: Dec 2009 Posts: 11714 A6 Le Mans tuned/A3 TFSI tuned

    #11 1st July 2011, 13:11

    

    1 user thanked this post: user_35090
12. xsi16v Regular Poster Joined: Jan 2006 Ilkeston, Derbyshire Posts: 469 374 bhp Supercharged 205 GTI, Passat Estate

    #12 1st July 2011, 13:24

    Quote:

    Originally Posted by marcusd wrapping the manifold

    so the cat is in the 4-2-1 manifold? never seen one like that befor!!!. Surely that takes away the point of having 4-2-1 as your not going to get the performace gains. Would have thought a normal 4-2-1 and sports cat under the car in the mk1 place would be better.
13. marcusd Saxperience Post Whore Joined: Jan 2009 warrington Posts: 7551 posi blue mk2 2003 vtr

    #13 1st July 2011, 13:34

    Quote:

    Originally Posted by xsi16v so the cat is in the 4-2-1 manifold? never seen one like that befor!!!. Surely that takes away the point of having 4-2-1 as your not going to get the performace gains. Would have thought a normal 4-2-1 and sports cat under the car in the mk1 place would be better.

    well go on kam website janspeed + sports cat.
    so without cat i'm gonna get so much extra bhp i may as well get rid yea?
14. xsi16v Regular Poster Joined: Jan 2006 Ilkeston, Derbyshire Posts: 469 374 bhp Supercharged 205 GTI, Passat Estate

    #14 1st July 2011, 14:03

    Just had a look, never seen those befor. As i said above though, your not going to get full advantage of a 4-2-1 manifold because its got a cat in it. The advantage is thats is a sport cat and not standard!.
    
    I still say a normal 4-2-1 with a sports cat (or no cat ) under the car would be better. Untill its gets back to back tested its just my opinion lol
15. marcusd Saxperience Post Whore Joined: Jan 2009 warrington Posts: 7551 posi blue mk2 2003 vtr

    #15 3rd July 2011, 17:12

    just to check once heat wrap is on and engine on its supposed to smoke like a bitch for a while yea?
16. xsi16v Regular Poster Joined: Jan 2006 Ilkeston, Derbyshire Posts: 469 374 bhp Supercharged 205 GTI, Passat Estate

    #16 4th July 2011, 14:13

    yeah. Normally smells a bit like popcorn!.