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10-30-2007
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#1 |
 
Join Date: Apr 2007
Location: Northern VA
Posts: 2,661
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63 mm Throttle Body
I see a lot of Z owners mention 63mm throttle body as one of their mods.
Who makes it and about how much $? How does it differ from the stock throttle body and when does this mode make since? |
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10-30-2007
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#2 |
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Guest
Posts: n/a
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Re: 63 mm Throttle Body
The two big blades inside the TB are a 58mm size. The bore is enlarged to 63m and new butterflies are cut out and mounted up.
Cost is around 300. The gain on a P&P plenum and injector housing set is minimal. |
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10-30-2007
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#3 | |
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: 63 mm Throttle Body
Quote:
Hans 
__________________
90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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10-30-2007
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#4 |
 Join Date: Aug 2005
Location: north of montreal
Posts: 510
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Re: 63 mm Throttle Body
thats an interesting topic...i also heard that 58mm is big enough to feed a 350 cu.in,no matter what kind of mods you have...any real world results?...dyno comparo?
bj 91/1735 |
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10-30-2007
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#5 |
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Guest
Posts: n/a
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Re: 63 mm Throttle Body
I would rather see somebody put the 300 bucks towards headers than to modify the TB.
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10-30-2007
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#6 | |
  
Join Date: May 2007
Location: Peoria, AZ
Posts: 9,155
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Re: 63 mm Throttle Body
Quote:
This is what Jeff told me 6 months unless you punch the block you are throwing your money away on this TB mod. |
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10-31-2007
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#7 |
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Join Date: Oct 2007
Location: lone pine and mammoth lakes ca.
Posts: 544
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Re: 63 mm Throttle Body
How about if ya give it an upper -cut !!!!!!!!!!!!!!! Sorry couldnt help my self
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10-31-2007
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#8 |
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Join Date: Aug 2005
Location: San Fernando Valley, CA.
Posts: 896
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Re: 63 mm Throttle Body
IMO if a 48mm TB will support a 502 CI BB the stock TB should be plenty for the LT5 even with plenty of porting. Sure, its comparing 2v to 4v but airflow is airflow.
__________________
1990 ZR1, 142,000 miles-Black on black 4.09's Haibeck chip, 3"exh, K&N, meth inj. |
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