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Old February 25th, 2009, 06:48 AM   #1
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Bored throttle body

just to share with you guys.. it was bored out 4mm and the gains are very noteable



upper manifold throttle body mount



throttle body "front"


REAR




after bored 4mm















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Old February 25th, 2009, 06:53 AM   #2
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compairing with old throttle body..









 



old butterfly plate on top of bored throttle body



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Old February 25th, 2009, 08:31 AM   #3
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Nice job,Can you elaborate a little more on the gains that you feel?
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Old February 25th, 2009, 08:36 AM   #4
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^ That, and/or dyno sheet showing gains...
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Old February 25th, 2009, 08:37 AM   #5
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4mm doesn't seem like much, but when compared side by side to the old one you can really see the difference!

what is involved in this? I assume you have to send it out to get done? what would something like this cost?
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Old February 25th, 2009, 09:14 AM   #6
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Originally Posted by rajin929 View Post
4mm doesn't seem like much, but when compared side by side to the old one you can really see the difference!

what is involved in this? I assume you have to send it out to get done? what would something like this cost?
+1


im assuming the butterfly had to be custom fabbed for the new bore size? was the butterfly shaft changed too?
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Old February 25th, 2009, 09:26 AM   #7
hmmm what next?
 
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very nice

also did you bore out the IM to match the size?
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Old February 25th, 2009, 09:48 AM   #8
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Nice job,Can you elaborate a little more on the gains that you feel?

lets say.. it pulls harder.. 3000RPM felt like 4000RPM





Quote:
Originally Posted by rajin929 View Post
4mm doesn't seem like much, but when compared side by side to the old one you can really see the difference!

what is involved in this? I assume you have to send it out to get done? what would something like this cost?
had to send it to machine shop to get it done..
i am from Taiwan.. it cost about USD115. things are cheaper at here.
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Old February 25th, 2009, 09:52 AM   #9
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very nice

also did you bore out the IM to match the size?
from the first post it looked like the IM was already a larger bore size than the throttle body.. look at the first few picures again the IM bore is almost 7cm across whereas the stock throttle body was about 6.5 cm

*note- im just talking about the rear throttle body picture
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Old February 25th, 2009, 09:55 AM   #10
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+1


im assuming the butterfly had to be custom fabbed for the new bore size? was the butterfly shaft changed too?
the plate is fabbed.. and the shaft is re-used..

they need to push or hammer out the shaft before they can bore it out.
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Old February 25th, 2009, 10:07 AM   #11
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cool....Taiwan eh, awesome

we got some world wide representation on these forums =)
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Old February 25th, 2009, 10:28 AM   #12
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doesn't maxbore do it also? cost like 100 bucks USD or 103 with paypal. You should get the IM port matched also. anyways nice mod.
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Old February 25th, 2009, 10:35 AM   #13
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it is nice if someone can figure out a way to make it fully open.....
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Old February 25th, 2009, 01:49 PM   #14
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^ We just have to wait until someone adapts a blitz throttle controller. So, when you gonna up-load a video of your engine in action?
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Old February 25th, 2009, 04:32 PM   #15
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doesn't maxbore do it also? cost like 100 bucks USD or 103 with paypal. You should get the IM port matched also. anyways nice mod.
Yup Maxbore does it for 100 bux shipped with a core. If you send intake manifold and throttle body its like 150 together. I was considering it, but didnt think that 4mm would yield much on NA
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Old February 25th, 2009, 04:47 PM   #16
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I am looking into another option to go much larger than 68mm, it is part of another project, but would allow us to use cable operated throttle bodies, like the 80mm universal ones that are out there. Also after looking at the Subaru throttle bodies and factory manual I believe the Blitz throttle controller for the subaru's could be adapted.
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Old February 25th, 2009, 06:15 PM   #17
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I am looking into another option to go much larger than 68mm, it is part of another project, but would allow us to use cable operated throttle bodies, like the 80mm universal ones that are out there. Also after looking at the Subaru throttle bodies and factory manual I believe the Blitz throttle controller for the subaru's could be adapted.
Paul, can you please elaborate on this for me because you know I've been looking into this for a while.
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Old February 25th, 2009, 06:19 PM   #18
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Not at this time, if I am sucessful I will make sure you know about it.
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Old February 25th, 2009, 06:22 PM   #19
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Thank you. Approx how long do you think till you will know if you are successful?
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Old February 25th, 2009, 11:31 PM   #20
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I kinda want the 70mm one from skunk2 but then again my motor is not built.
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Old February 26th, 2009, 07:19 AM   #21
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Can we send out throttle body and other parts to King's motorsports to have this work done? I know they worked on the K-series quite a bit...just curious, i'm probably not going to do it because I need my car and can't afford to have it down for a few days, but if its an option for other peeps I thought I'd throw it out there.

Edit: I don't even know if I would benefit from this mod...
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Old February 27th, 2009, 08:13 AM   #22
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Can we send out throttle body and other parts to King's motorsports to have this work done? I know they worked on the K-series quite a bit...just curious, i'm probably not going to do it because I need my car and can't afford to have it down for a few days, but if its an option for other peeps I thought I'd throw it out there.

Edit: I don't even know if I would benefit from this mod...
what you could do is grab another throttle body and send that out to get bored out. same goes for the other parts but that could end up being costly. i may do it with my TSX manifold once it gets here, and maybe a throttle body if i can find one.

Paul can you do this kind of work yet or no?
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Old February 27th, 2009, 09:19 AM   #23
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Yes I can do the work, but you being a I4, the easir solution for the TB would be to grab a 7th gen V6 tb which already gives you a much larger bore than the one on the K24
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Old February 27th, 2009, 01:15 PM   #24
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but aren't the V6 7th gens all drive by wire?
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Old February 27th, 2009, 01:31 PM   #25
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Yes, but there is also the 2nd TL-S/CL-S as well was the Pilot/oddy TBs. Also I wasn't sure what year you were since I believe it was 05 the K24 in the 7th gen got the DBW TB as well.
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Old February 27th, 2009, 01:32 PM   #26
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yeah im an 04 with the cable throttle. the 2nd gen TL-S/CL-S would work?
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Old February 27th, 2009, 01:35 PM   #27
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With some minor mods....
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Old February 27th, 2009, 01:37 PM   #28
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hmm...maybe i'll hold off putting the TSX IM on then. what kind of modifications are they?
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Old February 27th, 2009, 02:18 PM   #29
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Have to move two holes on the IM where the TB bolts up....
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Old February 27th, 2009, 02:24 PM   #30
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Yes I can do the work, but you being a I4, the easir solution for the TB would be to grab a 7th gen V6 tb which already gives you a much larger bore than the one on the K24
How much would you charge to bore out the trottle body if we sent you one?

Would it even be worth it with my setup?

Intake, j-pipe, test pipe, exhaust
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