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Modifying the 48mm Throttle Body
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Re:fitting the throttle body 11 years 11 months ago #50749

Has the 52mm throttle body made much of a difference as i only have a standard 1.8 cc and would like a little more get up and go

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Re: Modifying the 48mm Throttle Body 11 years 11 months ago #50752

michaelcngm wrote: wrote:
Only just read this thread - I also 'flowed' a 48 alloy TB last year. You can read all about it here . It certainly hasn't harmed the performance as I confirmed at the Silverstone track day!


First post. Welcome to the forum. :)

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Re: Modifying the 48mm Throttle Body 11 years 11 months ago #50753

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The larger throttle body will help but you really want to get more air in in the first place. The most cost effective bang for your money is to fit a K&N 57i cone filter, See this thread on the T-Bar

:woohoo:
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Re:fitting the throttle body 11 years 11 months ago #50754

I'd say that I can detect a difference. I wouldn't say it's gone all v8 on me but I'd say revs pick up more quickly low and mid-range.

Next job will be to take the air intake to the nearside wing, then a TT exhaust and then a remap.

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Last edit: Post by tikkathreebarrels. Reason: typo

Re: Modifying the 48mm Throttle Body 11 years 11 months ago #50755

Does the 56mm throttle body fit the F or was this just a ZR throttle on a vvc

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Re: Modifying the 48mm Throttle Body 11 years 11 months ago #50756

You'd have to compare the mounts but quite possibly so. I'm going out now but could measure the spacing of the bolt holes if you like...
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Re: Modifying the 48mm Throttle Body 11 years 11 months ago #50758

Thats ok i could measure mine just looking on a auction site and found 56mm thanks anyway

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Re: Modifying the 48mm Throttle Body 11 years 11 months ago #50759

I have put a 52 throttle body on today and allso a pipercross air fillter witch I got off eBay for 25 pounds .just had to buy cold air feed from halfords .the results are real good very pleased with mine

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Re: Modifying the 48mm Throttle Body 11 years 11 months ago #50760

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Those cold air feeds from Halfords are expensive, I used 100mm (4") semi-flexible aluminium ducting for extractor fans. See this thread on the T-Bar

Something like this from ebay

4 in (100mm) 3mtr ALUMINIUM CORRIGATED SEMI FLEXIBLE DUCTING for Extractor Fans
Completed


at £9 for 3m there is enough there to do 2 or 3 MGF's

Regarding the 56mm throttle body I vaguely remember having read that someone fitted one and was not happy with the throttle response and went back to a 52mm one.
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Last edit: Post by PQD44.

Re: Modifying the 48mm Throttle Body 11 years 11 months ago #50775

Well not bothering with a 56mm just won a 52mm ali one off a well known auction site hope to get a little more low down grunt :woohoo:

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Re: Modifying the 48mm Throttle Body 11 years 11 months ago #50779

£48 all in nice one :)

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Re: Modifying the 48mm Throttle Body 7 years 8 months ago #171311

Despite being an avid reader of the T-Bar, until I was scanning through the 'how to's' I'd always assumed that the only way to improve a 48mm throttle body was to replace it with a 52mm version. Then I found this thread and its sister (the Mk2) and I removed the wedge from my 48mm throttle body this afternoon and the F seems to be running very well as a consequence. The throttle is 'sharper' and I've not noticed any issues maneuvering at low speed either. I used Evo-stick Plumbers' Mait to fill the holes.

This is the cleaned and filled butterfly:



The whole throttle body had been greasy presumably as result of 15 years of muck coming via the breather.

This is the Evo-stick - about £5 from B&Q. I pressed the fill quite hard with a biro when it had set and nothing moved. I also drop tested the butterfly from a couple of feet and nothing fell out.




This is the butterfly back in the body.




Anyway, I'd missed this modification for the 4 years or so that I'd been on the T-Bar so I'm highlighting it now in case others have also not seen it. If you have a 52mm throttle body you can ignore the thread as the wedge was not fitted to those.

Richard
1.8i Mk2 Solar Red, 16 inch square spoke wheels, MGFMania hood with zip-in glass rear window, DRLs, Kmaps ECU, Pipercross panel air filter, MGOC Supersports back box & some cockpit bling
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Last edit: Post by Blow-in. Reason: spelling

Modifying the 48mm Throttle Body 7 years 8 months ago #171318

Modified-48mm-throttle-body-mark-2. Click to view. Nice job Richard. :broon:
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Re: Modifying the 48mm Throttle Body 4 years 8 months ago #191185

Would a very gentle countersinking both sides with a slightly oversized drill bit prevent solder from falling out either side?

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Re: Modifying the 48mm Throttle Body 4 years 8 months ago #191187

Should do. A Very gentle countersinking, lol!
David
:shrug:

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Modifying the 48mm Throttle Body
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