Power Estimate

1. mato Newbie Joined: Mar 2009 Posts: 1

   #1 23rd March 2009, 20:30

   Hi, I am just wanting oppinions on roughly what power the engien of the spec below will make:
   Standard VTR bottom end
   Stage 3 Head
   Pipr 270 Cam
   Vernier Pulley
   Bogg Brothers Inlet
   R6 Carbs
   ITG sock filters
   4 into 1 manifold
   Single box magnex exhaust
   Thanks and all oppinions apprecticiated.
   BTW it will be set up professionally on a rolling road.
2. JamesRm Forum Section Moderator Joined: Aug 2008 Liverpool Posts: 15517 Saxo VTR

   #2 23rd March 2009, 22:04

   What has been done to the inlet? ( How are we meant to know what Bogg brothers is? )
   What has been done to the head? ( how are we meant to know what a "stage 3" is? )
   
   I can rally say without knowing what has been done to the above.
   
   But probably around 130bhp ( if its the 98bhp VTR )
3. gouldy87 Saxperience Forum Bum Joined: Jun 2008 Posts: 3932

   #3 23rd March 2009, 22:09

   bogg brothers is the inlet manifold that the throttle bodies bolt onto via flanges
4. Ryanp Super Moderator Joined: Feb 2004 Tonbridge United Kingdom (England) Posts: 38236 Vtr, 172, throttle bodied track slut

   #4 23rd March 2009, 22:10

   Quote:

   Originally Posted by SaXo_vtr123 But probably over 150bhp ( if its the 98bhp VTR )

   I want what you are smoking. Its very rare to see an 8v over 140 tbh.
   
   the 270 is a mild cam aswell.
5. JamesRm Forum Section Moderator Joined: Aug 2008 Liverpool Posts: 15517 Saxo VTR

   #5 23rd March 2009, 22:34

   He said he had throttle bodies aswell? well he said carbs but i think he means TBs. And who knows whats going on with the head and inlet. It was only a rough estimate anyway.
   
   What would you say?
6. DA13 L-plater Joined: Oct 2008 Aberdeen Posts: 72 mk2 wicked red vtr

   #6 23rd March 2009, 22:44

   if you go onto the rallye register forum, a couple of guys on there are runing this sort of spec on there s2 8v, but with a wilder cam i would suspect to get better gains having bike carbs. That will give you a ruff idea of what to estimate from your engine spec mate.
7. Ryanp Super Moderator Joined: Feb 2004 Tonbridge United Kingdom (England) Posts: 38236 Vtr, 172, throttle bodied track slut

   #7 23rd March 2009, 22:52

   Quote:

   Originally Posted by SaXo_vtr123 He said he had throttle bodies aswell? well he said carbs but i think he means TBs. And who knows whats going on with the head and inlet. It was only a rough estimate anyway. What would you say?

   TBs dont give massive gains, its the ability to run wild cams which Tbs give which give the power.
   
   Tbs alone give better throttle response and midrange torque as a general rule of thumb and on bad inlet manifold design will give good power, but TU inlet manifolds are quite good.
   
   As I said 140bhp ish/max due to the 270 being a mild cam.
   
   Theres no forged pistons etc etc.... its not a big spec.
8. gouldy87 Saxperience Forum Bum Joined: Jun 2008 Posts: 3932

   #8 23rd March 2009, 22:57

   Quote:

   Originally Posted by Ryan TBs dont give massive gains, its the ability to run wild cams which Tbs give which give the power. Tbs alone give better throttle response and midrange torque as a general rule of thumb and on bad inlet manifold design will give good power, but TU inlet manifolds are quite good. As I said 140bhp ish/max due to the 270 being a mild cam. Theres no forged pistons etc etc.... its not a big spec.

   agreed may get more power from differnt internals, messing with compression etc.....
9. Sparco_Tom Saxperience Addict Joined: Jan 2007 Aylesbury, Bucks Posts: 12836 Yeaaahh Fiesta

   #9 23rd March 2009, 23:07

   i wouldnt go any further than saying 120-130max r6 carbs arent amazing and the cam is mild soo 30bhp increase i think is fair to say with those mods
10. DA13 L-plater Joined: Oct 2008 Aberdeen Posts: 72 mk2 wicked red vtr

    #10 27th March 2009, 19:19

    the only way you'll see around 150 bhp or over on a 8v silvertop vtr with bodies etc is if you've got some good head work, some guys are paying 800 quid to qep to do there head and that see's them around 150 bhp.
    
    thts with k1 gsxr 1000 throttle bodies, wild cam(280 duration), standalone and a qep head along with the usual breathing mods. ow and a good condition engine to start with