bored out throttle body
02-23-2009, 06:00 PM
#1
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Year: 1988
Model: Cherokee
Engine: Renix 4.0 I6
bored out throttle body
does anyone know what the exact stock bore is and how much people usually bore them over???
02-23-2009, 06:22 PM
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Year: 1988
Model: Cherokee
Engine: Renix 4.0 I6
thanks for the info... i have a boring machine at my shop so im gonna take it there and see what i can do.. any tips on doing this???
02-23-2009, 08:46 PM
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Year: 2000
Model: Cherokee
Engine: 4.0
http://www.go.jeep-xj.info/HowtoTBboring.htm might be something for you to read
but the top half of the TB is 60mm. and so is the butterfly valve, so if u wanted to bore out to 62mm you would to have to make a new butterfly valve, i think it is called a throttle plate, with the edges feathered correctly. For the amount of work involved and the small amount of gains you're probably best option is to go 60mm through the bottom half to match the top. hve fun
but the top half of the TB is 60mm. and so is the butterfly valve, so if u wanted to bore out to 62mm you would to have to make a new butterfly valve, i think it is called a throttle plate, with the edges feathered correctly. For the amount of work involved and the small amount of gains you're probably best option is to go 60mm through the bottom half to match the top. hve fun
Last edited by xer0; 02-23-2009 at 08:53 PM.
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