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| Service | Purchase |
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| Single, Dual and ITB boring prices. Click on the drop down menu to the right to select your TB type. |
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| TB Shaft machining. $35 Shaft is machined to a thinner profile to reduce turbulence. New low profile (flush with shaft) screws are installed. |
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| TB Gasket $10 New, reusable OEM type gasket made to fit bored TB |
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| Adapters and Spacers $35 Carcepts adapters or any other spacer bored to match. |
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| Manifold plenum port match $75 Not available for international orders |
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| Canada and international shipping AIR MAIL ONLY No GROUND shipments from Canada. There is a $45 fee for Ground shipments from Canada. |
The work begins by inspecting your TB. I make sure it operates correctly and that there are no cracks or obvious damage. 
The TB is fully disassembled and the factory butterfly is discarded. 
The bare casting is then put on a lathe and bored to the max size possible.
I bore the TB evenly from front to back. If possible I taper the opening ( filter side) to create a ventury effect which helps move air through the TB faster.
After it is bored and polished, the casting is thoroughly cleaned, degreased and pressure washed to remove machining chips and aluminum dust from the polishing.
Then it's time to make a new bigger butterfly. I make all the butterflies from scratch, in house.
They all start as a raw sections of brass or aluminum alloy (6061 T6) if your TB came with an aluminum butterfly.
The butterfly is now a blank ready to be machined to size. The butterflies I make are machined to .0005 tolerance,
that is 1/2 of a thousand of an inch. The butterfly is custom sized for each TB, it has to be that way in order to get the most out of each TB. 
Once the blank is turned into a machined butterfly, I test fit it into the shaft. The slot in the shaft needs to be
enlarged to accept the new bigger butterfly. 
The butterfly now fits inside the enlarged slot of the shaft.
The casting, shaft, and butterfly are fitted to ensure all parts move without issues. The
butterfly is marked for the location of the screws and drilled for clearance. 
Once I am sure everything works as it should, I put the TB back together and test it again for proper operation.
A lot of care is taken to make sure you get a TB that works like it's supposed to. I do not remove or seal important vacuum ports or coolant passages.
For racing purposes where some of those features are not necessary, I can plug or remove those parts. Please contact me to discuss any custom work you'd like to be performed. |
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