motorbike throttle bodys?
Discussion
has anyone put motorbike throttle bodys on a v8.
i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
adam459 said:
has anyone put motorbike throttle bodys on a v8.
i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
yep, have a look at the 'filth' posting
Adam i dont think you should consider running this system with an AFM,thats gonna be your bottle neck,much better to use a MAP sensor no restrictions on your motors breathing,i would love to have time to get involved in this set/up,im jealous really.think you have your work cut out though.Good luck keep us posted.
Markh said:
adam459 said:
has anyone put motorbike throttle bodys on a v8.
i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
yep, have a look at the 'filth' postingi've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
bhpjon said:
Markh said:
adam459 said:
has anyone put motorbike throttle bodys on a v8.
i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
yep, have a look at the 'filth' postingi've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
this help I hope
http://www.pistonheads.co.uk/gassing/topic.asp?h=0...
Edited by Markh on Saturday 15th December 18:29
Markh said:
bhpjon said:
Markh said:
adam459 said:
has anyone put motorbike throttle bodys on a v8.
i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
yep, have a look at the 'filth' postingi've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
Cheers Mark, looks a cracking job,do you know what year bike the throttles are from please; also is the spacing adjustable between them. Did you make the inlets yourself? Sorry for the thousand questions!
this help I hope
http://www.pistonheads.co.uk/gassing/topic.asp?h=0...
Edited by Markh on Saturday 15th December 18:29
I assume you would pull the separate throttles into a common air intake from the filter, so there's an opportunity to retain the AFM if you want. The standard one is reputed to be fairly restrictive though, so there would be benefits from dicthing it and going to MAP based load sensing. That implies changing to an aftermarket engine management system which adds significantly to the amount of work, but if you're already making your own intake manifold and redesigning the cooling system that probably won't trouble you.
Markh said:
bhpjon said:
Markh said:
adam459 said:
has anyone put motorbike throttle bodys on a v8.
i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
yep, have a look at the 'filth' postingi've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
this help I hope
http://www.pistonheads.co.uk/gassing/topic.asp?h=0...
Edited by Markh on Saturday 15th December 18:29
Edited by bhpjon on Saturday 15th December 19:40
adam459 said:
has anyone put motorbike throttle bodys on a v8.
i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
before you go too far just make sure you know and understand the differnce between throttle bodies and running a plenum? they are massively different espiecially for the the bigger capicity engines, a lot have tried a lot have failed and wasted a shed load of money, a quick tip a cylinder only fires once, they dont all suck air in at the same time!!i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
GreenV8S said:
I assume you would pull the separate throttles into a common air intake from the filter, so there's an opportunity to retain the AFM if you want. The standard one is reputed to be fairly restrictive though, so there would be benefits from dicthing it and going to MAP based load sensing. That implies changing to an aftermarket engine management system which adds significantly to the amount of work, but if you're already making your own intake manifold and redesigning the cooling system that probably won't trouble you.
Hi Greenv8s, i am looking at two airboxes similar to the cerbera, eg 4 throttle bodies into 1 airbox and the cooling system into a remote thermostat housing, then going down the megasquirt or emerald route, just got to design it now!!v8 racing said:
adam459 said:
has anyone put motorbike throttle bodys on a v8.
i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
before you go too far just make sure you know and understand the differnce between throttle bodies and running a plenum? they are massively different espiecially for the the bigger capicity engines, a lot have tried a lot have failed and wasted a shed load of money, a quick tip a cylinder only fires once, they dont all suck air in at the same time!!i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
v8 racing said:
adam459 said:
has anyone put motorbike throttle bodys on a v8.
i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
before you go too far just make sure you know and understand the differnce between throttle bodies and running a plenum? they are massively different espiecially for the the bigger capicity engines, a lot have tried a lot have failed and wasted a shed load of money, a quick tip a cylinder only fires once, they dont all suck air in at the same time!!i've recently bought 2 sets of throttle bodys off a GSXR 1000 and i'm going to make manifolds similar to what i've seen from an engineering company on the Internet. they have a throttle position sensor and i'll get an in line thermostat so i can get rid of the inlet manifold. i don't know what to do about the air flow meter, and there is probably so much i've overlooked.
i'm open to all information about this. cheers, adam.
Sound advice .. you need pretty big throttle plates if you're making 8 individual ones .. something over 46mm is really what you need to be looking at. Running a plenum with single/twin throttle inlets works for most people, indeed until you're looking at a real 300hp there's no need to change up from a 71/72mm throtle plate which runs out of flow around 270/280hp compared to an open inlet. Where individual throttles really score though is taming wild cams, so if you're pushing the cam spec to the extreme you can often pick up valuable driveability from separating the inlet tracts downstream of the plenum/collection area.
spend said:
Make sure you understand the firing order & bank difference on the RV8 when you start delving into this... Then you start getting ideas on how to split the manifold 
4 pots are easy, hence the flat plane v8's...
Dave
As far as I know, none of the experiments with different combinations of intake have shown any particular gains. The problem seems to be associated with the exhaust. Until you fix that, the intake isn't going to tune properly. Cross the relevant exhaust ports over and all the classic "problems" go away and it starts behaving like any other engine. 4 pots are easy, hence the flat plane v8's...Dave
bhpjon said:
Thanks for that Rob, alot more to this than meets the eye, what about the combination of the two eg four throttles going into one common airbox (X2)?
If you are retaining the plenum then this is the same as John Eales/ACT and others have done. If you are running direct into an inlet manifold... then I wouldn't like to work that one out at all.There are two things to consider: the airbox side is pretty straightforward and is concerned with getting air to the throttle bodies. Ditch the AFM and go TPS or MAP for the fuelling. The more complex side is the inlet manifold where each throttle feeds its own inlet tract or the throttle bodies supply a common area and the engine sucks in what it wants (plenum arrangement). The plenum method is easier to sort out but doesn't really exploit the full potential of the throttle bodies.
There certainly have been manifolds made from the past for Weber or Dellorto downdrafts, might be an easier option if you can find one dependent of the center line spacing of the chokes ?
http://www.g33.co.uk/images/carbs.jpg
Mark
http://www.g33.co.uk/images/carbs.jpg
Mark
Have a look here for bespoke manifols http://www.altiss.com/ThrottleBodies.html
This is an interesting read http://www.extraefi.co.uk/cobra/accobra.htm
Lots of options shown here http://www.mez.co.uk/ms12.html
Andy
This is an interesting read http://www.extraefi.co.uk/cobra/accobra.htm
Lots of options shown here http://www.mez.co.uk/ms12.html
Andy
Else said:
Have a look here for bespoke manifols http://www.altiss.com/ThrottleBodies.html
This is an interesting read http://www.extraefi.co.uk/cobra/accobra.htm
Lots of options shown here http://www.mez.co.uk/ms12.html
Andy
These were the type of manifold i was looking at, although form the other comments on here looks like i'm looking at it in too simplistic a fashion ( as usual) Greenv8's comments about the exhaust side of things are interesting; it seems a combination of the two is the best way to go?This is an interesting read http://www.extraefi.co.uk/cobra/accobra.htm
Lots of options shown here http://www.mez.co.uk/ms12.html
Andy
http://www.altiss.com/ThrottleBodies.html
These are the ones I had fitted, but they are now off due to a change in direction, will be probably be on ebay soon
Mark
These are the ones I had fitted, but they are now off due to a change in direction, will be probably be on ebay soon
Mark
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