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Author Topic: 51mm Throttle Bodies 2 available soon.  (Read 7633 times)

Offline Justin14100

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51mm Throttle Bodies 2 available soon.
« on: November 23, 2010, 01:20:41 pm »
Ok. Here we go!
Over the last few months I have been sapping up throttle bodies for sale.
I spent this weekend in our machine shop calculating butterflies because thats the most important bit of the whole throttle body. we calculated the chamfered edge and made a jig to be able to make the 51mm butterfly with chamfered edges (for best seal) Im testing a 45mm one in a standard body at the moment and it hasn't stuck or hunted revs yet. works real sweet. (much better than my riveted de-wedge and much much better than the standard wedged body i just took off)

So in the next few weeks (maybe this week) we will be making a 51mm to test. I have also got the top t-peice ported to match the 51mm opening and ported + polished the rest.

Photo's of the test:






I really wanted to make something to almost OEM spec and our 45mm test butterfly seals excellently!
Going to road test the 51mm when we get them going shortly.

So our units will consist of:
Ported & Matched t-peice.
51mm butterfly with chamfered edge.
New gasket between t-peice and main unit (i want to add a tiny lick'o sealant because of the smaller size (cut to match)

Price will be £150 exchange
Contact me if you have any questions.
« Last Edit: February 14, 2011, 10:15:34 pm by Justin14100 »
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Offline supercharged spaniel

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Re: 51mm Throttle Bodies are back!
« Reply #1 on: November 23, 2010, 08:58:00 pm »
nice bit of engineering going on here.
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Offline jez1272gt

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Re: 51mm Throttle Bodies are back!
« Reply #2 on: November 24, 2010, 10:41:50 am »
good to see that someone is doing these properly. once i get back on track with the car sometime in the new year i shall be back to see how the tests went on the 51mm's for sure! hope all goes well for the testing!
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Offline xrrich

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Re: 51mm Throttle Bodies are back!
« Reply #3 on: November 24, 2010, 12:12:13 pm »
Nice Work! What kind of differences will i get from using 51mm Throttle body

Cheers
Rich
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Offline Justin14100

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Re: 51mm Throttle Bodies are back!
« Reply #4 on: November 24, 2010, 01:41:21 pm »
Thanks guys, we have spent a long time working to get the chamfered edge the same as the originals, then we had to make a jig to be able to machine them. has taken us some time we first started talking about it back in Feb!

51mm should make it much more rev happy, i did a search a while ago for some quotes on what people thought but i suppose people with experience with them will have to post on this thread!
Will let you guys know how the tests go. should be real soon!
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Offline dub-disaster

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Re: 51mm Throttle Bodies are back!
« Reply #5 on: November 24, 2010, 10:08:37 pm »
mite end up buying a butterfly from you mine was done by juan but has pretty much no chamfre on it ! so i have a feeling it will hunt revs. keep up the good work
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Offline Justin14100

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Re: 51mm Throttle Bodies are back!
« Reply #6 on: November 25, 2010, 02:21:26 am »
I'm thinking of suppling some de-wedged butterflies instead of screws / rivets or liquid metal.
we can do anything between 45 and 51 if anyone needs be!
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Offline Jezza-7

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Re: 51mm Throttle Bodies are back!
« Reply #7 on: November 26, 2010, 02:54:49 pm »
Glad its all going well mate. Defently gonna have one off you.
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Offline Fred

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Re: 51mm Throttle Bodies are back!
« Reply #8 on: December 09, 2010, 09:37:08 pm »
Nice to see someone with Passion in their work instead of just financial gain.
Clearly you enjoy the challenge! A man after me own heart.

Good Lad Justin.

Fred.
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Offline Justin14100

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Re: 51mm Throttle Bodies almost there!
« Reply #9 on: January 17, 2011, 03:22:30 pm »
Ok, with all my uni work ect these have taken longer than expected. Gotta drive a near 200 miles to get to my dads machine shop too!
Had some great progress over the weekend though. The 45mm i had with our home made butterfly has been working great over xmas so our angle calculations and machining paid off, great seal!
We finally turned our first few 51's. Though one of them, perhaps had a little too much:

oops! :D fear not, it is saveable, current plan is to sleeve it i think. top hole in it is the hole to one of the screws that hold on the WOT sensor. so if anyone asks if 51mm the biggest you can go? yes. yes it is. ;)
anyway. I ended the day with a full working 51mm test sample to make sure ours actually work first:

All i can say is WOW. revs so much more freely, its like a bike! mine is a daily and i love it. off boost driving is a little more pokey too, which as a student, is welcomed happily for my eco drives haha!
we got a great seal again with our elliptical + chamfered butterfly and had no problems on my 200 mile drive home. Got one to assemble after we perfect the porting of the top elbow, I want to get that as good as possible to get the max out of these and should have a few more to follow shortly after that.
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Offline jez1272gt

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Re: 51mm Throttle Bodies almost there!
« Reply #10 on: January 17, 2011, 04:35:14 pm »
 ;D good to hear someone has done this properly! looks very good!
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Offline breadman

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Re: 51mm Throttle Bodies almost there!
« Reply #11 on: January 17, 2011, 06:18:03 pm »
Superb work Justin, very impressive indeed. 8)
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Offline Jezza-7

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Re: 51mm Throttle Bodies almost there!
« Reply #12 on: January 17, 2011, 06:29:36 pm »
Nice one justin. Looks like your working hard. Keep it up!  8)
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Offline cheddarcheese

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Re: 51mm Throttle Bodies almost there!
« Reply #13 on: January 17, 2011, 07:20:41 pm »
would also be interested in just a 51mm de-wedged butterfly what price would they be? nice work btw!
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Offline vwmk3jon

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Re: 51mm Throttle Bodies almost there!
« Reply #14 on: January 26, 2011, 08:59:56 pm »
Nice work chap :)

Would be interested in a 51mm TB too.
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