Oversizing TB

1. nassso Infrequent Poster Joined: Oct 2006 Posts: 187

   #1 19th January 2007, 10:57

   What do you think on oversizing throttle body. The standart TB is 52mm i am going to make it 56mm. I sow this on one greek saxo vts. They did 167hp with newman's ph2 cams + oversized TB + 11,2 compression + remap. Look at this http://www.lioliosracing.gr/main.php?id=142&lang=en
2. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

   #2 19th January 2007, 14:53

   i have mine ported and it doesnt make that much differnce.
   
   im getting a c2 vts inlet manifold and am going to try an mi16 throttle body on it.
3. nassso Infrequent Poster Joined: Oct 2006 Posts: 187

   #3 19th January 2007, 16:18

   What is the difference between saxo inlet and c2 inlet? Also you will probably loose your idle with so bigger throttle body and remap will be must.
4. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

   #4 19th January 2007, 16:56

   i have had my car maped but will be getting map adjusted after fitting these.
   
   c2 vts inlet:
   
   
5. CampDavid Saxperience Post Whore Joined: May 2006 Bedford Posts: 7457 Saxo VTS Peugeot 306 GTI-6 Astra SRI

   #5 19th January 2007, 16:58

   Interested in this Williams, keep me posted
6. spencer_cammedvts Saxperience Forum Bum Joined: Nov 2005 MEASHAM United Kingdom (England) Posts: 3445 257bhp Ibiza Cupra Turbo

   #6 19th January 2007, 17:00

   yer keep us posted.
   
   by the way you cant machine out a vts throttlebody without machining out the inlet manifold as they sit flush with each other. hence the reason you can only buy port & polished throttlebodies not enlarged throttlebodies.
7. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

   #7 20th January 2007, 15:37

   you can buy enlarged throttle bodies, jenvey do them. £250 each.
   
   will keep evryone posted on this.
8. Jackman Saxperience Addict Joined: Sep 2006 Bridgend, South Wales Posts: 11234 iTB 205 Rallye, 205 STDT.

   #8 20th January 2007, 15:44

   i have a TB off a 106 rallye. yet to fit it though
9. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

   #9 20th January 2007, 23:01

   onto what? its the inlet manifold you want to be using.
10. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #10 22nd January 2007, 18:02

    just ordered my c2 inlet, need to sort gti6 throttle body and then start bodging them together
11. spencer_cammedvts Saxperience Forum Bum Joined: Nov 2005 MEASHAM United Kingdom (England) Posts: 3445 257bhp Ibiza Cupra Turbo

    #11 22nd January 2007, 19:34

    have a look at your standard throttlebody when its open.
    
    its flush with the the inlet manifold around the entire circumference of the throttlebody. if you put a bigger throttlebody on it would make the airflow worse as it would be hitting a flat rim on the inlet manifold. ist like porting your exhaust ports but not matching the gasket & manifold if you get me?.
    
    also this is a bit off subject but i fitted my cams and had my head gas flowed and the car feels quite a bit quicker than before and i havnt had it mapped yet. (only 4 days to go though) its just that i thought that tere wasnt much of a difference till you had it mapped?
12. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #12 23rd January 2007, 09:37

    its flush with the the inlet manifold around the entire circumference of the throttlebody. if you put a bigger throttlebody on it would make the airflow worse as it would be hitting a flat rim on the inlet manifold. ist like porting your exhaust ports but not matching the gasket & manifold if you get me?.
    
    you can buy enlarged throttle bodies though. you can also enlargen the c2 inlet as its metal and has enough material to bore some out.
13. spencer_cammedvts Saxperience Forum Bum Joined: Nov 2005 MEASHAM United Kingdom (England) Posts: 3445 257bhp Ibiza Cupra Turbo

    #13 23rd January 2007, 16:56

    yer iv not seen em for the saxo but i wouldnt question that you can buy an enlarged throttlebody for the sax. i was just saying that without the inlet manifold being matched it wouldnt make a difference.
    
    there is a little bit to be bored on the standard vts inlet but metal is allways better!(apart from the extra few kilos)
    
    this c2 inlet jobby is sounding quite a good mod!
14. williamsvts Saxperience Post Whore Joined: Feb 2006 northumberland Posts: 7693 pulsar gtir, mk4 astra sxi

    #14 24th January 2007, 12:04

    manifold has arrived but they've sent the wrong 1!!!!! tits