![Harrop 2300 Twin Helix Supercharger](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/Pulley-3-1-1.jpg)
Harrop 2300 Twin Helix Supercharger
We obtained the LQ9 FI Shortblock from Texas Speed with the full intention of putting an 88-94 mm Borg Warner Turbocharger on it. Loyd Mead purchased a Harrop 2300 Supercharger kit and put it on his 2004 GTO. It was one of the cleanest installs I had seen and the kit was very well put together. I immediately got interested in the Harrop and we bought a complete kit, New in the Box.
The LQ9 was not the average platform they had considered for the Harrop so we initially had to fabricate quite a few solutions to make everything fit. First, the coolant tanks were engineered to0 sit on the passenger side, as that is the driver’s side in Australia where they are made and sold. Steve fabricated a larger capacity reservoir to sit on the driver’s side fender.
That required us to move to an aftermarket overflow tank and to relocate the CPU from the drivers side inner fender (wheel well) to the interior of the car. Beyond that fabrication of a custom exhaust and heat shield were required for the Cold Air Intake.
![OEM CPU location for 2004 GTO, Driver's side inner fender](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/408/IMG00087.jpg)
OEM CPU location for 2004 GTO, Driver’s side inner fender
![Free space after CPU Relocate](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/408/IMG00114.jpg)
Free space after CPU Relocate
![Key to the mod is to feed the wiring back through the dash](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/408/IMG00111.jpg)
Key to the mod is to feed the wiring back through the dash
![Profanity helps immeasurably, as a motivator](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/408/IMG00107.jpg)
Profanity helps immeasurably, as a motivator
CPU on inside of cab kick panel.
Another view of relocated CPU
We also switched from a 2004 radiator to a 2005 radiator. The advantages were the overflow plumbing, the routing of the hoses, and the 2005 had gfreater capacity and also had the drain plugs.
![2005 GTO Radiator](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/SANY0049.jpg)
2005 GTO Radiator
![OEM Coolant Reservoir on Driver's Fender](http://i512.photobucket.com/albums/t327/wrpnEthyl/CAI%20Options/SANY0006-4.jpg)
OEM Coolant Reservoir on Driver’s Fender
![Fabricated Coolant Reservoir replacing 04 overflow tank](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/c119cfdf-65bd-42b0-80d7-1b105ee0ce73_zpse5c4db8b.jpg)
Fabricated Coolant Reservoir replacing 04 overflow tank
![New in Box Harrop 2300](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/IMG00014.jpg)
New in Box Harrop 2300
![Cog Drive Kit installed from the factory](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/IMG00012.jpg)
Cog Drive Kit installed from the factory
![8 rib Damper](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/IMG00017.jpg)
8 rib Damper
![We used Siemens 80 lbs injectors](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/IMG00012.jpg)
We used Siemens 80 lbs injectors
![Overdriven COG](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/IMG00016.jpg)
Overdriven COG
![Innovative West 8 Rib belt kit, including overdriven damper](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/IMG00015.jpg)
Innovative West 8 Rib belt kit, including overdriven damper
![More of the IW 8 Rib Kit](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/SANY0008.jpg)
More of the IW 8 Rib Kit
![Looking up the ports at the intercooler](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/SANY0010.jpg)
Looking up the ports at the intercooler
![Torquing her down](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/SANY0030.jpg)
Torquing her down
![http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/SANY0047.jpg](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/SANY0047.jpg)
90 mm TB on the Harrop
![West 8 Rib Kit Installed](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/SANY0047.jpg)
Innovative West 8 Rib Kit Installed
![Smallest drive pully we could find](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/SANY0048.jpg)
Smallest drive pulley we could find
![Wrapping the belts was the final chore](http://i512.photobucket.com/albums/t327/wrpnEthyl/Mods/Turbo%20Whistle/Supercharger/Pulley-3-1.jpg)
Wrapping the belts was the final chore