traindriver
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- Feb 24, 2006
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- Christchurch
- Members Ride
- 85 VK Sedan 3.3 Injected
Grunt Hunt – Rebuilding a 202 SM style.
In 2000 SM mag did a three part series on hotting up a blue 202 that was first rebuilt to factory specs and tolerences using a good old standard Varijet carb.
Once they got it back they did the following to spice up the old girl, step by step on an engine dyno.
1 – Air flow
Removed standard air filter and housing – gained 14kw just like that. Suggest a K+N or high flow air filter with new housing / lid.
2 – Fan
Removed standard crank driven fan blade – gained 4kw. Thermo fan installation suggested.
3 – Internal mods.
Swapped cam for a Crow 35667 cam (still available) and added new Crow valve springs, retainers and collets to the standard blue head.
New lifters and a Crow set of helical cut adjustable timing gears were added also.
Power now at 120kw @ 4800rpm with a peak torque of 259nm up from the factory standard of 83kw and 238nm torque.
4 – Carb and extractors
They were of the opinion that the Varijet was at its peak about now so they replaced it with a 350 Holley and added Pacemaker extractors. Power now 122kw @ 4900rpm with 265nm of torque @ 3400 rpm using simple bolt on stuff.
5 – Yella Terra head and upgraded Scorcher ignition.
Replaced the standard head with one from Yella Terra, complete with valves, springs etc. and beefed up the ignition system with one from Scorcher set at around 28 deg.
Power now 140kw @ 5200rpm with 282nm torque at 3800rpm.
6 – Fuel Injection
VK EFI fuel injection added run with a Haltec fuel only F9 ecu.
Total power = 166bhp at the wheels.
I plan to replicate this rebuild using a VK black 202 with EFI as a start point and eventually add a CRS supercharger kit (that can be turned off or on when needed) for my VK.
Cheers
AndrewOfNZ
In 2000 SM mag did a three part series on hotting up a blue 202 that was first rebuilt to factory specs and tolerences using a good old standard Varijet carb.
Once they got it back they did the following to spice up the old girl, step by step on an engine dyno.
1 – Air flow
Removed standard air filter and housing – gained 14kw just like that. Suggest a K+N or high flow air filter with new housing / lid.
2 – Fan
Removed standard crank driven fan blade – gained 4kw. Thermo fan installation suggested.
3 – Internal mods.
Swapped cam for a Crow 35667 cam (still available) and added new Crow valve springs, retainers and collets to the standard blue head.
New lifters and a Crow set of helical cut adjustable timing gears were added also.
Power now at 120kw @ 4800rpm with a peak torque of 259nm up from the factory standard of 83kw and 238nm torque.
4 – Carb and extractors
They were of the opinion that the Varijet was at its peak about now so they replaced it with a 350 Holley and added Pacemaker extractors. Power now 122kw @ 4900rpm with 265nm of torque @ 3400 rpm using simple bolt on stuff.
5 – Yella Terra head and upgraded Scorcher ignition.
Replaced the standard head with one from Yella Terra, complete with valves, springs etc. and beefed up the ignition system with one from Scorcher set at around 28 deg.
Power now 140kw @ 5200rpm with 282nm torque at 3800rpm.
6 – Fuel Injection
VK EFI fuel injection added run with a Haltec fuel only F9 ecu.
Total power = 166bhp at the wheels.
I plan to replicate this rebuild using a VK black 202 with EFI as a start point and eventually add a CRS supercharger kit (that can be turned off or on when needed) for my VK.
Cheers
AndrewOfNZ