Re: What effect would larger throttle body have on 99 stock
Posted: July 10th, 2013, 2:59 pm
http://jeep4.0performance.4mg.com/intake.html
There are some numbers take them for what you want. But doesn't simple logic tell us that a bored throttle body will help with throttle response. Let's look at it very simple.....the throttle plate limits the RPM of the motor by controlling the amount of air into the motor. With the plate closed there is just a very little crack around the plate and the holes for the IAC of course to allow air in. As you twist the plate you increase the hole opening allowing more air into the motor increasing RPM and power. So if you have a larger hole then it would take less twist of the plate to let air in. Basically 1/4 throttle becomes 3/8 throttle and so forth. Then at the very top end 100% throttle becomes 105% (these numbers are just examples), now if your engine can use all the available air of 105% throttle you will see and increase in power. If you have a restriction else where where it can't fill the throttle body to 105% you will get nothing or perhaps a loss. None the less you will fill an increase through out the lower throttle positions as you will be effectively opening the throttle more with less pedal movement. This is the increased throttle response so many talk about. So yeah you should fill a difference with a bigger or bored throttle body. How much will depend on what else you have done to effectively take advantage of it. With our strokers the wot throttle numbers may be more then enough but why wouldn't we want to bring the power at a lower earlier position.
There are some numbers take them for what you want. But doesn't simple logic tell us that a bored throttle body will help with throttle response. Let's look at it very simple.....the throttle plate limits the RPM of the motor by controlling the amount of air into the motor. With the plate closed there is just a very little crack around the plate and the holes for the IAC of course to allow air in. As you twist the plate you increase the hole opening allowing more air into the motor increasing RPM and power. So if you have a larger hole then it would take less twist of the plate to let air in. Basically 1/4 throttle becomes 3/8 throttle and so forth. Then at the very top end 100% throttle becomes 105% (these numbers are just examples), now if your engine can use all the available air of 105% throttle you will see and increase in power. If you have a restriction else where where it can't fill the throttle body to 105% you will get nothing or perhaps a loss. None the less you will fill an increase through out the lower throttle positions as you will be effectively opening the throttle more with less pedal movement. This is the increased throttle response so many talk about. So yeah you should fill a difference with a bigger or bored throttle body. How much will depend on what else you have done to effectively take advantage of it. With our strokers the wot throttle numbers may be more then enough but why wouldn't we want to bring the power at a lower earlier position.