HSV VF GTSR
Paul's VF GTSR on the hub dyno
610+ rwhp. LSA 6.2 supercharged.
See the buildDyno Tuning
Hub dyno and engine dyno tuning
Every Sam's Performance car is tuned in-house. With both a hub dyno and an engine dyno under one roof, we prove the numbers before your car leaves the workshop.
Two dynos, one roof
Our hub dyno bolts directly to the hubs, so it measures power at the wheels repeatably without tyre slip, which matters when you are putting 700 or 800 horsepower down. That is where finished cars are tuned and where the rear-wheel figures you see on our builds come from.
Our engine dyno lets us run in, test and tune engines on the stand before they are installed. It is where Jamie's SP427 made 1080hp.
E85 or pump 98
We tune for 98 pump fuel and for E85. A VF SS with a 416ci stroker made 800+ rwhp on pump 98, and a VF GTS with our heads and cam package made 750 rwhp on E85. We will tell you honestly which fuel suits the way you use your car.
Sam has been tuning LS engines for a long time. He told Street Machine he even helped HP Tuners develop some of their TPS functions.
Dyno Tuning photos
Straight from the workshop floor in Greenacre.
Dyno Tuning FAQs
What is the difference between a hub dyno and an engine dyno?
A hub dyno bolts to the car's wheel hubs and measures power at the wheels with no tyre slip, so it is used to tune the finished car. An engine dyno tests the engine on its own before it is installed. Sam's Performance in Greenacre has both.
Do you tune for E85?
Yes. Sam's Performance tunes for both E85 and 98 pump fuel. A VF GTS with the workshop's heads and cam package, Harrop pulleys and a full exhaust made 750 rwhp on E85.
Are your power figures at the wheels or at the engine?
Car results published by Sam's Performance are rear-wheel horsepower (rwhp) measured on the workshop's hub dyno. Engine dyno figures, such as the 1080hp SP427, are measured at the crankshaft and labelled as engine dyno results.
Related services
LS Engine Builds
SP Built LS engines and strokers from 383 to 427ci, forged bottom ends and ported heads, assembled and dyno proven in-house.
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Supercharger Packages
Harrop 2300 and 2650 superchargers, Harrop boosted pulleys and airboxes for LSA, and Tickford Roush kits, fitted and tuned.
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Cam & Head Packages
Our own cam, lifter and valve spring packages, LS7 lifter upgrades and ported heads, developed and proven on our dynos.
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