Getting the most out of the Throttle Bodies
Discussion
As part of my on-going development i want to see how i can get the most possible out of the throttle bodies. The simple awnser would be to buy some nice roller barrels, however there would be no fun in that!
So me and Julian64 have teamed up to see what we can do. We spent some time today disscusing the best routes to take.
I would like to hear everyones views on this topic and we also had some questions.
Firstly, at the bottom of the throttle bodies there is a slight curve rather than just going straight to the inlet. Why? It must have been done for a reason. If this was removed could it have any negative effects?
The top of the throttle body is 45mm and 40mm at the bottom. The inlet is also 40mm. Is the narrowing an important factor? i.e should the top allways have a larger diameter than the bottom and why?
We dont want to do the standard port and polish, we want to see just how good we can make them. This could involve machining them to far! Due to this is was wondering if anyone has any broken or scrap throttle bodies? The same with a head. How damaged they are really dosnt matter!
Lastly, anything you think we should try!??
Cheers
Mike
So me and Julian64 have teamed up to see what we can do. We spent some time today disscusing the best routes to take.
I would like to hear everyones views on this topic and we also had some questions.
Firstly, at the bottom of the throttle bodies there is a slight curve rather than just going straight to the inlet. Why? It must have been done for a reason. If this was removed could it have any negative effects?
The top of the throttle body is 45mm and 40mm at the bottom. The inlet is also 40mm. Is the narrowing an important factor? i.e should the top allways have a larger diameter than the bottom and why?
We dont want to do the standard port and polish, we want to see just how good we can make them. This could involve machining them to far! Due to this is was wondering if anyone has any broken or scrap throttle bodies? The same with a head. How damaged they are really dosnt matter!
Lastly, anything you think we should try!??
Cheers
Mike
My view is that if i can develop the std system then hopefully others can also use it.
As i said in my initial post for outright power i would go and spend my money on a set of titan roller barrel throttles. However where's the fun in that!
I have a plan for the throttles now. Once we have developed these it will be on to the secondry induction system! Im seeing carbon firbe....
Mike
As i said in my initial post for outright power i would go and spend my money on a set of titan roller barrel throttles. However where's the fun in that!
I have a plan for the throttles now. Once we have developed these it will be on to the secondry induction system! Im seeing carbon firbe....
Mike
though i forget the name of the company, they advertise in PPC magazine
julian64 said:
I had a third idea today which is so radical its pretty much starting from scratch.
There is a vaccum chamber which runs along the length of the 4.5 inlets. It has a small hole going into each throttle body below the butterfly. It works as an addition of all the inlets vaccum and transfers it to a tube at one end of the rail. In addition a second vaccum is taken simply from the first throttle body.
As all I've been doing today is staring at inlets while I refurbed the burnt out one I had, a cunning plan came to me.
Although there isn't enough space for rollerbody design in the 4.5 inlets because of their spacing, there is a cunning way of sorting it if you cut the spindle connection between each throttle body. Junk the vaccum chamber, and bore the vaccum chamber for a spindle to operate each throttle body seperately via a linkage.
In this way you've just made youself a big degree of space, and I think I can get a zero cross section system working off this.
Because I'm just looking at the throttle bodies in isolation, can anyone tell me the reason for the two types of vaccum pickoff, and the possibility of relocating them??
I'm liking this!!There is a vaccum chamber which runs along the length of the 4.5 inlets. It has a small hole going into each throttle body below the butterfly. It works as an addition of all the inlets vaccum and transfers it to a tube at one end of the rail. In addition a second vaccum is taken simply from the first throttle body.
As all I've been doing today is staring at inlets while I refurbed the burnt out one I had, a cunning plan came to me.
Although there isn't enough space for rollerbody design in the 4.5 inlets because of their spacing, there is a cunning way of sorting it if you cut the spindle connection between each throttle body. Junk the vaccum chamber, and bore the vaccum chamber for a spindle to operate each throttle body seperately via a linkage.
In this way you've just made youself a big degree of space, and I think I can get a zero cross section system working off this.
Because I'm just looking at the throttle bodies in isolation, can anyone tell me the reason for the two types of vaccum pickoff, and the possibility of relocating them??
We really do need a scrap set of bodies!
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