Heatwrapping 16v Manifold Queries

1. Dan-Subtlem Forum Section Moderator Joined: Aug 2006 Westgate on Sea/Bexley Posts: 17223 Series 1 Rallye

   #1 17th June 2010, 13:19

   Got a Janspeed 16v Manifold, just got a few questions.
   
   What are the advantages to heatwrapping an exhaust manifold?
   
   How much is needed to wrap a manifold? (Mine is a 4-2-1 if it matters)
   
   Are there any disadvantages to wrapping a manifold?
   
   All help will be thanked.
   
   Cheers
   
   Dan
2. JamesRm Forum Section Moderator Joined: Aug 2008 Liverpool Posts: 15517 Saxo VTR

   #2 17th June 2010, 13:25

   Advantages = Cooler engine bay temps and better exhaust flow
   
   Disadvantages = The wrap does end up looking nasty after a while and can sometimes cause manifolds to crack iirc

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3. nev6 Infrequent Poster Joined: Apr 2010 lowestoft, suffolk Posts: 212 saxo vts, 205 gti-6, 307 hdi

   #3 17th June 2010, 15:11

   some people say that if using a mild steel manifold, moisture can build up beneath the wrap and cause premature rusting leading to failure.
   Although the manifold on my 205 is wrapped and has been fine for as long as i've had it.
   So i will be heat wrapping the manifold on my saxo soon

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4. stupotvtr Saxperience Forum Bum Joined: Jul 2007 EDINBURGH Posts: 3143 BMW e36 328i sport

   #4 17th June 2010, 15:55

   Mite effect pulse tunning due to the exhaust gases flowing faster but tbh you wouldn't notice the difference.

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5. Dan-Subtlem Forum Section Moderator Joined: Aug 2006 Westgate on Sea/Bexley Posts: 17223 Series 1 Rallye

   #5 17th June 2010, 16:12

   Thanks lads.
   
   Any ideas on roughly how much wrap i will need?
6. Lewis Saxperience Forum Bum Joined: Oct 2009 Middlesbrough/Coventry Posts: 3808 Megane 225

   #6 17th June 2010, 16:57

   50 meters IIRC
7. user_27114 Saxperience Forum Bum Joined: Sep 2008 jarraaaaaaaaaa Posts: 3580 Mk2 16v VTR + Nitrous

   #7 17th June 2010, 18:29

   Quote:

   Originally Posted by L_E_W_I_S 50 meters IIRC

   is it not 50 ft?
8. Lewis Saxperience Forum Bum Joined: Oct 2009 Middlesbrough/Coventry Posts: 3808 Megane 225

   #8 18th June 2010, 13:47

   Quote:

   Originally Posted by DusheR is it not 50 ft?

   There is a guide to heatwrapping a manifold on sax-p search for it im shure it tells you there
9. user_32315 Saxperience Post Whore Joined: Mar 2009 Uppingham, Rutland Posts: 9569 mk1 JP4'd VTR, '16 Fabia Monte Carlo

   #9 18th June 2010, 14:00

   ive gotta say 50 meters sounds ridiculous, your not heat wrapping your car lol
10. Barry123 Saxperience Hardcore! Joined: Oct 2005 Aycliffe Posts: 32205 Saxo VTS

    #10 18th June 2010, 14:00

    The only other thing I can add is if you still have the cat installed on the car be very careful about heat wrapping. The additional heat applied to the cat will cause it fail prematurely...
    
    Another reason to decat!
11. user_32315 Saxperience Post Whore Joined: Mar 2009 Uppingham, Rutland Posts: 9569 mk1 JP4'd VTR, '16 Fabia Monte Carlo

    #11 18th June 2010, 14:10

    whats the advantage of heat wrapping the whole exhaust, ive seen a couple people do it but i can see an advantage to this
12. Barry123 Saxperience Hardcore! Joined: Oct 2005 Aycliffe Posts: 32205 Saxo VTS

    #12 18th June 2010, 14:31

    It's retain as much of the temperature of the gas as possible (so the temperature doesn't dissipate along the exhaust system), this theoretically maintains the flow velocity and therefore yields better engine response and a bit more power since the piston on the exhaust stroke doesn't have to push as 'hard' to force the exhaust gases out.

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13. raunchz Saxperience Addict Joined: Jul 2005 Solihull / Bournemouth Posts: 14233 2015 Lapiz Blue Golf R

    #13 18th June 2010, 14:48

    it's 50 Feet not 50m btw
14. Lewis Saxperience Forum Bum Joined: Oct 2009 Middlesbrough/Coventry Posts: 3808 Megane 225

    #14 19th June 2010, 15:22

    I stand corrected it was for a full exhaust
15. LSOfreak Saxperience Addict Joined: Jan 2008 west london Posts: 13810

    #15 19th June 2010, 15:26

    ive been a little put off since reading oil spilled onto someones and eventually set the car alight
16. PETE-VTR Established Member Joined: Aug 2008 york/ north yorkshire Posts: 1953

    #16 19th June 2010, 15:50

    Quote:

    Originally Posted by LSOfreak ive been a little put off since reading oil spilled onto someones and eventually set the car alight

    whos car was that on? hope it wasnt too bad.
    
    i know i wont be using heatwrap again after it cracked my manifold
17. LSOfreak Saxperience Addict Joined: Jan 2008 west london Posts: 13810

    #17 19th June 2010, 15:51

    read it off here once. not sure who
18. mardiGRANT Regular Poster Joined: Jun 2009 Ghetto spec HQ Posts: 412 Saxo vtrS/ nissan 200sx s13

    #18 19th June 2010, 15:55

    Quote:

    Originally Posted by LSOfreak ive been a little put off since reading oil spilled onto someones and eventually set the car alight

    
    Also heard of this, i think on driftworks someone spilled some oil on his wrap couldnt get it out then on the dyno it got so hot it set the heat wrap on fire.
19. LSOfreak Saxperience Addict Joined: Jan 2008 west london Posts: 13810

    #19 19th June 2010, 17:53

    i think yeah, wasn't it a 106 iirc?
20. moxy89 Saxperience Post Whore Joined: Feb 2008 Southampton Posts: 8188 Astra vxr with added boost

    #20 19th June 2010, 18:24

    simple dont spill oil on the manifold..
21. PETE-VTR Established Member Joined: Aug 2008 york/ north yorkshire Posts: 1953

    #21 19th June 2010, 18:26

    Quote:

    Originally Posted by moxy89 simple dont spill oil on the manifold..

    and make sure your cam covers are sealed properly
22. mardiGRANT Regular Poster Joined: Jun 2009 Ghetto spec HQ Posts: 412 Saxo vtrS/ nissan 200sx s13

    #22 19th June 2010, 18:56

    Quote:

    Originally Posted by moxy89 simple dont spill oil on the manifold..

    A good solution