Which manifold for vts ?

1. godfridge Infrequent Poster Joined: Mar 2006 Posts: 155 Mk1 Saxo vtr

   #1 24th February 2007, 01:02

   Hi peoples would like some feedback of what manifold to go for with my proposed vts setup once i get the engine fitted...
   
   

   • enclosed induction
   • magnex exhaust system including decat and centre silencer removed
   • catcam 708s or something similar
   • remap with limiter raised apropriatly (but would like around 7800rpm)

   
   so which manifold gmc 4-1 or a 4-2-1 design??
   
   and also is peak power with 4-2-1 alot lower than would be if with a 4-1 ?(asuming both setups had been remapped)
   
   
   thanks for looking and replying
2. godfridge Infrequent Poster Joined: Mar 2006 Posts: 155 Mk1 Saxo vtr

   #2 25th February 2007, 03:04

   come on someone can comment please
3. vipergfx Saxperience Forum Bum Joined: Oct 2006 Washington Posts: 3117 veeteeess

   #3 25th February 2007, 03:22

   4-2-1 is quicker off the mark, and 4-1 has a higher top end I believe
4. godfridge Infrequent Poster Joined: Mar 2006 Posts: 155 Mk1 Saxo vtr

   #4 25th February 2007, 03:27

   would a 4-2-1 happily rev to that amount of revs or would i need a 4-1 for that?
5. hesslevtr Saxperience Hardcore! Joined: May 2004 Hull (England) Posts: 18709 1.6 vtr

   #5 25th February 2007, 10:37

   gmc 4-1 thats all you need to know
6. godfridge Infrequent Poster Joined: Mar 2006 Posts: 155 Mk1 Saxo vtr

   #6 25th February 2007, 10:52

   thanks mate!
7. Dan Saxperience Hardcore! Joined: Dec 2003 Middlesbrough United Kingdom (England) Posts: 23676 Seat Leon FR

   #7 25th February 2007, 13:48

   Yeah gmc is the one to get mate.
8. VTS_16v_Boy Saxperience Post Whore Joined: Aug 2006 Dartford Kent Posts: 5251 Pug 1007 HDi Sport (daily) / Abarth 500

   #8 26th February 2007, 14:29

   Both will offer a good gain in perfomance but as most people want that little bit extra higher up the rev range to take advantage of the twin cams power band the 4-1 would probally be better suited.
   
   Bit anty Magnex as there are better exhausts out there, if your looking for good gains then Id recommend OMP as the exhaust is already setup to be cat-less. Check out YB racing on eBay as they are a OMP main supplier.
9. bloz Frequent Poster Joined: Dec 2004 Penkridge (Staffs),GB! Posts: 898 350z , 2007 Swift Sport

   #9 26th February 2007, 14:33

   I had GMC on me VTR was awsome only problem I ever had was they sit quite low and are easily scraped.
10. Mysticp Scotland Joined: Jul 2005 Edinburgh Posts: 9556 Saxo 1.6i 16v VTS, 2 Classic Minis

    #10 26th February 2007, 14:40

    Kam-Racing do a great deal for us on Raceland 4-2-1s as mentioned these increase low & mid range but lets face it, if your racing your gonna use the bottom end once,.. as you roll off the line.
    
    GMC 4-1 is the one to go with
11. and106gti L-plater Joined: Feb 2007 Birmingham Posts: 51 Saxo VTR 106 GTI

    #11 26th February 2007, 19:42

    gmc manifolds are awesome
12. godfridge Infrequent Poster Joined: Mar 2006 Posts: 155 Mk1 Saxo vtr

    #12 27th February 2007, 23:58

    i am down about 55 or 60 mm at front about bout 55 or 50 at back, back sits slightly higher.
    
    would this be a problem for the gmc scraping on speed bumpsand the like, anyone know ? ? ? ?
    
    currently have on of those pro-tech 4-2-1 manifolds of ebay on my vts engine just now and havent herd it scrape but my magnex centre box did thats why its off!!
13. riggsy Saxperience Post Whore Joined: Jan 2006 West Sussex Posts: 6280 Mk2 Saxo Vts

    #13 28th February 2007, 00:45

    I have the gmc but it came with the car so cant tell!
    
    I know some one who has the gmc 4-1 and a supersprint 4-2-1 he said the gmc sounds better but the 4-2-1 was better from performance.