entropy
Moderator
Posts: 8671
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posted January 19, 2006 02:45 AM
 Edited By: entropy on 19 Jan 2006 03:10
46 vs 48mm TB's on 1427
As long as i was loading pix, i scanned and loaded some dyno pulls
at Tejas dyno, Sept 10&13; 46 vs 48mm TB's; AF OK but not perfect
CF = 1.02, STD
48mm TB's, SPAZ tuned AF real close
CF = 1.01, STD
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TRNorBRN6001
Needs a job
Posts: 2021
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posted January 19, 2006 09:00 AM
Very Nice, perfect for your application. That motor has got some grunt.
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Megabyte
Pro
Posts: 1047
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posted January 20, 2006 02:24 PM
I've been hearing about this upgrade for awhile.
What does it take to upgrade to 48mm TBs ?
Can you buy them or do they have to be machined?
Will my Muzzy Gold stacks fit the 48mm TBs?
How much work is it to do the job?
Thanks for your help!
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entropy
Moderator
Posts: 8671
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posted January 20, 2006 07:47 PM
Megabyte,
The 48's are just bored out OEM TB's with 2mm bigger butterfly's. I don't know know who sells em; MM gave me a set he had laying around. The Muzzy stacks are 46mm, i got 48's from Bear Racing in S Africa. Not much work to mount them, just takes a bit of shaping the rubber TB holders.
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TRNorBRN6001
Needs a job
Posts: 2021
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posted January 21, 2006 09:37 AM
Edited By: TRNorBRN6001 on 21 Jan 2006 09:39
Orient Express does them $650(48mm to just past the butterfly and then
a little tapper at the end), I have heard of some other places for a little
cheaper. Usually for a busa they run around $400-$500.
What are the butterfly's made of on your set aluminum, stainless steel,
or brass?
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entropy
Moderator
Posts: 8671
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posted January 21, 2006 04:02 PM
quote:
Orient Express does them $650(48mm to just past the butterfly and then
a little tapper at the end), I have heard of some other places for a little
cheaper. Usually for a busa they run around $400-$500.
What are the butterfly's made of on your set aluminum, stainless steel,
or brass?
brass, Bear Racing butterfly's
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