C4 of the Year -- Performance Modifications
 

For Corvetteforum’s 2019 C4 Corvette of the Year competition we have some big changes in store to make the competition more inclusive and, we hope, more fun for site users.

The changes include opening the contest to site users across the globe, rather than limiting it to residents of the contiguous United States. Further, we’ll break the competition down into four categories:

• Stock Corvettes
• Corvettes with Appearance Modifications
• Corvettes with Performance Modifications
• Corvettes prepared primarily for track use

The reward in each of the categories is bragging rights and a designation under your user ID declaring your winning status.

This thread is for entries of Corvettes with Performance Modifications.

You can enter just one of the categories of competition and you do so by posting one photo of your C4 in the appropriate thread no later than 11:59 p.m. PDT, July 15. Moderators then will pick ten of their favorites as finalists and set up a poll to allow you to vote on which of those finalists is the C4 Corvette of the Year in each of the above-referenced categories. The judging, of course, is subjective and will be heavily influenced by the quality of the photographs submitted for the entries.

In subsequent months, we’ll feature other generations for Corvette of the Year with the winner in each of those generations competing for Corvetteforum Corvette of the Year.

The fine print: One entry per member. This contest is open to site users over the age of 18 who own the car they enter. Cars which have previously won are not eligible. Entry photos must have been shot by the Corvette's owner except in the track car category where the Corvette has been photographed on the track while the owner was driving it.

:cool:

1990 zr-1
 

https://cimg0.ibsrv.net/gimg/www.cor...7cc5369bfe.jpg


1990 ZR-1 #2180
Light modifications (ported plenum and injector housings, SW headers, Corsa exhaust, tune) for 460 HP

https://cimg5.ibsrv.net/gimg/www.cor...fa21399960.jpg

91 Steel Blue ZR-1
391 cubic inch closed deck block, fully ported (plenum, inj housings, heads), long tubes

https://cimg1.ibsrv.net/gimg/www.cor...2213fada6.jpeg

True C4 performance. The already awesome 205hp 1984 crossfire has been made even better. This beauty is equipped with a Dough Nash 4+3 and has been right hand drive converted for Australian roads.
Mods include:
Crane Cams Hydraulic Flat Tappet Z-256-2
Edelbrock Cylinder Heads Alloy E-Street ED5089
Comp Cams Roller Rockers High Energy Alloy 1.6 Ratio
Renegade Intake Manifold
Pacemaker Headers Primary Pipes 1 3/4 “ Collector 3"
DUI Distributor
Exhaust 2 1/4" Cat Delete
AIR Pump Delete
EGR Valve Delete
EBL Flash II ECM
Innovate LC-2 WBO2 sensor
This won’t be the most powerful C4 but it is a very cool configuration.

https://cimg8.ibsrv.net/gimg/www.cor...6557568add.jpg
New rings and bearings, high volume oil pump, all new engine bolts ( full kit top to bottom), valve job, hp cam( biggest one I could use without doing any extra machining) double roller timing chain, new push rods, roller tip rockers, hd valve springs, cleaned up head ports and gasket matched, Edelbrock performer manifold and carb and high volume water pump. Transmission was heavy duty rebuilt, 3 pass aluminum radiator with an external transmission cooler.