C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Boosting 1984 Corvette?

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Old Dec 16, 2005 | 08:50 PM
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Default Boosting 1984 Corvette?

How easy is this to accomplish with the nappy *** crossfire system... Would it be feasable to simply fab an aluminum box over the twin tb's similar to the plastic cover on it now and just run the boost into it like a huge carb hat?
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Old Dec 16, 2005 | 10:44 PM
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as easy as having someone build you a pressure box to do the Job. Furthurmore you can mount the BOV on the back of the box so you'll get to hear it. (right by the cowl) Maybe even integrate an intercooler core into it.
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Old Dec 17, 2005 | 06:52 AM
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Yes, that is what I did about five years ago.

Modifying the TBs for BOOST:
http://www.joby.se/corvette/mods/2001-0X01_tbi_mod/

Building the 'carb hat':
http://www.joby.se/corvette/mods/2001-0X05_air_box/

Then you need some extra fuel. The first year I used a progressive 2:1 fuel pressure regulator (FMU) and that worked ok on the stock engine. You need a better than stock fuel pump too. I used a Corvette LT1 fuel pump. 10 psi boost was a major improvemet over stock. I measured 65% power increase.
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Old Dec 27, 2005 | 10:42 PM
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joby what were the dyno numbers ? total cost?
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Old Dec 27, 2005 | 10:59 PM
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joby what were the dyno numbers ? total cost?
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Old Dec 28, 2005 | 03:57 AM
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Total cost was many hours of my own work.

This is numbers I got from StreetDyno.

65% power increase on the stock engine with 10 psi boost.
Both hp and tq peak moved up about 1000 rpm.



Yellow is without boost.
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Old Dec 29, 2005 | 12:20 PM
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when ya putting a kit together your your 84' brothers? you'd probably have a lot of interest
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Old Dec 29, 2005 | 05:09 PM
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I have AutoCad drawings of the brackets I made.

A lot more pictures here:
http://www.joby.se/corvette/
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Old Dec 29, 2005 | 06:18 PM
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joby, your web site is awsome. lots of useful info.
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Old Dec 29, 2005 | 10:44 PM
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so many sharp photos, lots of info
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