Video: Supermang gets a water-to-air intercooler and diff upgrade

Scotty finishes off the intercooler and diff upgrades for our L67-swapped VN in this episode of Carnage

Photographers: Matt Hull
Videographers: Matt Hull

The upgrades for the Supermang continue in this latest episode of Carnage, as Scotty gets the L67-shoved VN Commodore ready to take on the Holden Drag Nationals at Heathcote Park Raceway.

The decision was made to go with a water-to-air intercooler chilling method for the Supermang, with a big ice tank in the boot pumping ice-cold water to a cooler barrel at the front of the car. The ice-cool air then gets sent through a plate that sits under the blower, making sure the charged air going into the engine is at optimal temperature.

Scotty only had around two and a half days to turn the Supermang around in time to make it to Holden Nationals, so we needed some more hands on deck to get the big jobs done.

Luckily a young fan by the name of Jake and his mate Chris offered their services, helping out Scotty with the tricky TIG welding on the ice tank and cooler piping. Jake did a solid amount of work on the ice tank at home before bringing it into the workshop to finish it off, and he and Chris smashed out the cooler piping in record time.

With that done and the water lines plumbed to the front of the car, another key upgrade for the Holden Nats was the diff. Our last time out at Heathcote revealed the factory 3.08:1 open diff just wasn’t up to task anymore, so Scotty enlisted Matt from Mobile Diff Repairs to give it a makeover.

He upgraded the gears to a much shorter 3.7:1, and also fitted the Torque-Lock LSD centre that Mace Engineering supplied. Matt got the diff back to us really quickly, and Scotty slapped it back into the car with some beefed-up Ultima shocks from Australian Automotive Parts.

The last mod was to sort out the bonnet clearance, and the quickest and easiest way to do that was to get another one and give it some Ryobi love.

It’s not the ideal solution, but with very little time to get Supermang ready, push came to shove. The original bonnet is still intact, thanks to a generous fan donating a spare blue one for us to cut up.

The next episode of Carnage will see Scotty racing for sheep stations at Holden Nationals, so make sure you tune in on Monday for that one.

We’d also like to extend a big welcome to VPW Australia, who have come onboard as a sponsor of Carnage. You’ll be seeing us raid their very extensive performance parts catalogue in coming episodes, so a big thanks to them, Ryobi and Hare & Forbes for making our Carnage exploits possible.