davisag
Expert Class
Posts: 103
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posted June 01, 2014 03:07 AM
47mm throttle bodies ?
hi live in the uk and plan to increase the bore of the throttle bodiesto 47mm for my 2006 model with tuned engine around 210 rear wheel
question is what size should the butterflys be , have measured the std throttle bodies and the butterflys at 44.4mm would appear to be 0.4mm larger dia than the throttle bore , so if I increase the body bore size to 47mm , will the butterflys need to be 47.4 mm ?
   
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davisag
Expert Class
Posts: 103
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posted June 04, 2014 01:16 PM
well for sure the std butterflys are made slightly oval as in the fully closed position they are less than 90 degrees to the throttle body. unless someone knows different the new 47 mm butterflys I will need will have to copy the same oval shape
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krexken
Zone Head
Posts: 732
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posted June 06, 2014 05:48 PM
 Edited By: krexken on 7 Jun 2014 01:49
Contact Jim at competitioncnc.com. They bore and reblade throttle bodies. I'm sure he'll know all about it. I just sent him some 14 tb's to be enlarged.
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted June 10, 2014 03:50 AM
Davisag, We have 47 and 48mm bored throttle bodies in stock. They are $580 on exchange for the gen 1 units. (06-11)
Its not something you want to try and do yourself.
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Y2KZX12R
CompetitionCNC.com
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