Big Bore trottle Body
- Thread starter snowman
- Start date
Anything is possible! It all depends on your budget!!
'The Great White'
'The Great White'
True true...anything is possible with budget. *sigh*...wish i had a budget for M3 lei...hahahaha
I have another 49 questions to ask you about this thread Mr Great White. Lemme make myself sound as impolite, impatient and irritating as possible.
Please wait for me a while, I need to go think about how to be that way.
I have another 49 questions to ask you about this thread Mr Great White. Lemme make myself sound as impolite, impatient and irritating as possible.
Please wait for me a while, I need to go think about how to be that way.
quiksilver
Core Group Members
snowman said:
It depends on your threshold and definition of "EXPENSIVE".
For example, if to you, GruppeM is expensive compared to Simota, then Boring = GruppeM. u are better off looking for second hand ECU chips in the buy/sell forum, it might suit your budget more.
by the way, changing the displacement of your car this way is illegal cos u r cheating the govt of road tax...
quiksilver said:
Bro, U mabok ah??? Big bore throttle body not = to bigger displacement!!!
'Clan Master'
quiksilver
Core Group Members
wilman2772 said:
muahaha! actually I dunno anyhow hantam only...
btw, the thread topic throttle spell wrongly so i got confused.. (lame excuse)
piggyboyz
Core Group Members
Boring out the throttle body on our car is impossible, at least for Singapore mechanic.
The throttle body is electronically controlled, boring out the throttle body will require the throttle butterfly to be replaced with a bigger diameter, else there will be too much air leak. the throttle butterfly has got the connecting rod connected to a gear, which is in turn connected to a sealed electronic motor. u must be ready to strip the whole electronic before u can even think of boring out the throttle body.
For the 320, 325, easiest will be to get a 330 ones and do a bit of modification to the intake manifold.
The throttle body is electronically controlled, boring out the throttle body will require the throttle butterfly to be replaced with a bigger diameter, else there will be too much air leak. the throttle butterfly has got the connecting rod connected to a gear, which is in turn connected to a sealed electronic motor. u must be ready to strip the whole electronic before u can even think of boring out the throttle body.
For the 320, 325, easiest will be to get a 330 ones and do a bit of modification to the intake manifold.
snowman
Well-Known Member
but it can still be done right? dont really know much for conti car, but for jap car, the usual case will be remove the throttle body, send it to some professional to machine and bore the throttle body, they will also machine a new piece of butterfly so that it will be able to fit very nicely onto the throttle body. this matter is very commonly done on jap car.
quiksilver
Core Group Members
snowman said:
but Valvetronic engines do not have throttle butterfly....therefore, unless u r driving the M54/M52 engines like piggy mentioned...hmmmm...
Whisky_Tango
Core Group Members
Here's a link that mentioned valvetronic engine has no throttle body.
http://waw.wardsauto.com/ar/auto_new_bmw_engines
Here a pix of vlavetronic engine, the servo motor at the top controls the third camshaft. The Y-arms which at their base move the fulcrum of the rocker arms back and forth, varying its leverage. Thus varies the valves opening amount.
http://waw.wardsauto.com/ar/auto_new_bmw_engines
Here a pix of vlavetronic engine, the servo motor at the top controls the third camshaft. The Y-arms which at their base move the fulcrum of the rocker arms back and forth, varying its leverage. Thus varies the valves opening amount.
quiksilver
Core Group Members
Whisky_Tango said:
Thanks Eric! here's another link on Valvetronic engines:
http://www.bmwworld.com/technology/valvetronic.htm
quiksilver
Core Group Members
snowman said:
Hmmm, u got a 6cyl engine under your bonnet?
piggyboyz
Core Group Members
TripleM said:
Wa bro, ur sig damn lau nua man !! nice
Snowman, u don see the throttle body by taking out the airhose. That is the MAF, mass air flow sensor. The throttle assembly is behind the the MAF, near to the engine. I don know if there is a throttle butterfly but i don think so... it's a different technology...
There is no throttle body for a valvetronic.
But in general, you have to be very careful when boring or enlarging your throttle body. If you get the calculations wrong, it will lead to the engine misfiring and not running smoothly at all. When that happens, you will lose power rather than gain power.
But in general, you have to be very careful when boring or enlarging your throttle body. If you get the calculations wrong, it will lead to the engine misfiring and not running smoothly at all. When that happens, you will lose power rather than gain power.
