82 corvette
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Joined: Dec 2007
Posts: 73
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From: Indianapolis Indiana
82 corvette
Im looking at an crossinjected 82 corvette. If i buy it I plan to make it a heck of a lot faster. I have about 2000 to spend on engine mods and upgrades, what should i get to achieve the maximum amount of performance for the dollar. And also where should i get the parts? (sorry im new) Have a good day.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
Hmmm...pretty subjectve, But:
If the car has no issues now
You could get the bigger throttle plates, bump the cam up and change the exhaust to true duals and keep the computer. Thats about the cheapest way to up the HP on an 82. Heads would be the next step
If the car has no issues now
You could get the bigger throttle plates, bump the cam up and change the exhaust to true duals and keep the computer. Thats about the cheapest way to up the HP on an 82. Heads would be the next step
Le Mans Master
Joined: Jul 2000
Posts: 6,664
Likes: 162
From: columbia city in
500 hp? pull the motor set it off to the side .you are not going to get it done with the stock motor and the cross-fire intake .how much do you have too spend?is this going to be a street car or a strip only?can you do the work yourself?http://www.crossfire.homeip.net/cftest/if you want to keep the cross-fire intake and they will help you make hp.
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Joined: Dec 2007
Posts: 73
Likes: 0
From: Indianapolis Indiana
I want to keep the motor. I have about 2 grand to spend. I just fond a performance kit for 1600 that gives the engine 410 horses. With that what could i possibly run in a 1/4 mile? goal is to run low 13s. And it is going to be a street car, just with a little bit of extra hp 
Race Director
Joined: Jan 2003
Posts: 15,175
Likes: 86
From: State of Confusion
Now that you've listed an established goal (although getting 500 HP for $2,000 IS kinda ridiculous ), we can better offer help.
My '79 Z28 ran low-13s @ 105+ MPH, on pump-gas, through open-headers, with a 10.3:1 355" SBC, on sticky 26" x 8" street-tires, with 4.10s gears, and a 6000 RPM shift-point, almost 20 years ago, and here are the particulars:
* iron Dart heads, 2.020"/1.600" valves, 64cc chambers, untouched, outta the box
* Victor Jr intake under a 750 double-pump Holley, open hood-scoop
* CompCams' 292H stick
* THM400 transmission, 2.75:1 Low Gear, 10" converter
* 4.11:1 rear-gears
Your '82 has 9.1:1 CR as it is with 76cc 'junk'heads, so swapping to 64cc heads would get the squueze about the same as my Z28:
Scoggin-Dickey Performance can supply you with vortec heads & an RPM Air Gap intake for $1,100, less S&H.
You'd need a cam-kit of similar dimensions, carb, headers (and exhaust ) to round-out the motor, assuming it is still in good working-order as-is:
the '82 700R4 is a weak piece of **** (mine has failed behind the wimpy stock Cross-Fire at the drag-strip! ), and the gear ratios are so far-apart they aren't great for drag-racing, but the OD might be a nice feature for street-driving, so you have to decide if you want to rebuild it, or switch to a THM350/THM400.
Your car also comes with either 2.72:1 gears, or the 'performance' (? ) 2.87 gears, and I'd think you'd need 3.73s minimum, which'll probably cost you another $750 for parts & install:
low-13s for $2000 sounds unlikely, but good-luck!
My '79 Z28 ran low-13s @ 105+ MPH, on pump-gas, through open-headers, with a 10.3:1 355" SBC, on sticky 26" x 8" street-tires, with 4.10s gears, and a 6000 RPM shift-point, almost 20 years ago, and here are the particulars:
* iron Dart heads, 2.020"/1.600" valves, 64cc chambers, untouched, outta the box
* Victor Jr intake under a 750 double-pump Holley, open hood-scoop
* CompCams' 292H stick
* THM400 transmission, 2.75:1 Low Gear, 10" converter
* 4.11:1 rear-gears
Your '82 has 9.1:1 CR as it is with 76cc 'junk'heads, so swapping to 64cc heads would get the squueze about the same as my Z28:
Scoggin-Dickey Performance can supply you with vortec heads & an RPM Air Gap intake for $1,100, less S&H.
You'd need a cam-kit of similar dimensions, carb, headers (and exhaust ) to round-out the motor, assuming it is still in good working-order as-is:
the '82 700R4 is a weak piece of **** (mine has failed behind the wimpy stock Cross-Fire at the drag-strip! ), and the gear ratios are so far-apart they aren't great for drag-racing, but the OD might be a nice feature for street-driving, so you have to decide if you want to rebuild it, or switch to a THM350/THM400.
Your car also comes with either 2.72:1 gears, or the 'performance' (? ) 2.87 gears, and I'd think you'd need 3.73s minimum, which'll probably cost you another $750 for parts & install:
low-13s for $2000 sounds unlikely, but good-luck!
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Burning Brakes
Joined: Nov 2005
Posts: 924
Likes: 15
From: DFW Metroplex Texas
The Crossfire is arguably the hardest C3 to mod from my experience.
The biggest bang for your buck is replacing the heads.
Even after doing this and adding a mild cam upgrade plus a free flowing exhaust you may only be in the mid 300HP range.
Stock 82's are very fun cruisers. They may not be ideal for what your goals are.
Just my $.02
Race Director
Joined: Jan 2003
Posts: 15,175
Likes: 86
From: State of Confusion
Red 69 is running 14-twenties @ 96 MPH with a slightly warmed-over '79 L-82 of unknown parts (I think he bought it that way )
