Heat wrapping a Manifold

1. nathan_570 L-plater Joined: Jan 2010 Posts: 45

   #1 29th June 2011, 19:20

   Just a few questions about heat wrapping:
   
   Do i even need to heat wrap my 4-2-1, my car is for road use only it wont be going on the track so not sure if i need it,some people say its bad for the manifold others highly recommend it.
   
   Which width of heat wrap is best to use 1 inch or 2.
   
   Does the manifold need to be sprayed with a high heat coating before being wrapped?
   
   Any help ,thanks
2. xsi16v Regular Poster Joined: Jan 2006 Ilkeston, Derbyshire Posts: 469 374 bhp Supercharged 205 GTI, Passat Estate

   #2 29th June 2011, 19:30

   To start with its not cheap so your £50 quid would be better of spent else where!. Not really needed on a road or track car at all unless you have parts very close to the manifold which could suffer from heat soak of melt. Its also known (from what i have read) to retain heat in the manifold which can cause restrictions in gas flow.
   
   If you want to do it use 2" wrap
3. user_16747 Banned Joined: Jul 2007 Posts: 4328

   #3 29th June 2011, 20:04

   And the spray goes on afterwards.
   Stops fluid ingress.
4. Gabbastard Saxperience Post Whore Joined: Dec 2002 United Kingdom Posts: 8390

   #4 29th June 2011, 21:24

   If you wrap or coat the manifold, youll keep bay temps down which is obviously good.
   
   The idea behind wrapping is keeping the heat in the gas - this means conservation of energy and thus conservation of gas momentum; by keeping the gas moving you get a better cylinder scavenge and hence better engine running
5. user_37187 Saxperience Forum Bum Joined: Sep 2009 Stranraer Posts: 3437 bodied VTR

   #5 29th June 2011, 21:30

   I certainly would, keep intake temp's down which will keep more oxygen in the air resulting in a bigger bang in you'r cylinders