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1991 GMC Syclone - Ride Of The Valkyries

Sweden Native Robert "Mr. Syclone" Pothorcki Runs 8s & Takes Title Of World's Fastest AWD SY
By Scott Parker
Photography by Scott Parker
1991 Gmc Syclone
1991 Gmc Syclone
Aside from the Mickey Thompson... 
   
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1991 Gmc Syclone
Aside from the Mickey Thompson 26x10.5 slicks and drag wheels the Swedish Sy is pure street. A fiberglass cowl hood is one of the only other cues that the Syclone is anything but stock-making it fun to surprise a few motorcycles and exotics.
1991 Gmc Syclone
Robert keeps unsprung weight... 
   
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1991 Gmc Syclone
Robert keeps unsprung weight to a minimum with Dynamic Pro Race 16x8 wheels up front and Mickey Thompson ET Drag 15x10 wheels out back. Wilwood lightweight, 4-piston brakes are used at all four corners as well.
1991 Gmc Syclone
From the Momo racing seat... 
   
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1991 Gmc Syclone
From the Momo racing seat the driver looks onto a host of Autometer gauges-EGT, boost, oil pressure and tranny temp-which line the stock dash and A-pillar. A chrome-moly cage was made by a local shop to meet Sweden's specs for street driven cars and trucks.
1991 Gmc Syclone
A 287-cube Bow Tie block with... 
   
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1991 Gmc Syclone
A 287-cube Bow Tie block with a forged bottom end, solid roller cam, Brodix ported aluminum heads, and a PTE GT45 ball bearing turbo help make this the fastest AWD Syclone in the world. An Edelbrock single plane intake, a PTE upper intake plenum and an air-to-air intercooler also help this street driven truck run 8s on 100-octane unleaded.
1991 Gmc Syclone
An NOS nitrous system jetted... 
   
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1991 Gmc Syclone
An NOS nitrous system jetted for 70 hp was installed to aid in cooling the 28 psi of boost. However, no successful runs have been made with the juice. It was Robert's goal to run 8s first before having a little fun with the laughing gas.

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