Wrenchrat™ Generation-1 SBC Twin Turbo System

Wrenchrat™ is now ready to fill the gap of a complete, premium, stainless steel twin turbo system at competitive pricing for the generation-1 small block Chevrolet. Designed to fit Camaro, Nova, Chevelle and numerous other vehicles of the 1960's -1980's. The Wrenchrat™ Twin Turbo headers are a unique 4-into-2 design. Many hours of engineering and fabrication was spent in the development of this kit to provide the most efficient, tightest fitting and eye-catching design possible. The reason for a 4-into-2 header design over a 4-into-1 is to get the turbocharger's to respond quicker, less turbo lag. By having one exhaust pulse follow the next keeps the individual exhaust pulse energy intact. A 4-into-1 header design loses the individual exhaust pulse energy by allowing the pulse to expand when it enters the collector, therefore decreasing the pulse energy. By taking advantage of the individual exhaust pulse energy we can offer a larger turbo that has the response of a smaller turbo. Our relentless pursuit of big horsepower and performance will be continuously transferred into our turbo kits in order to provide you, the customer, with the absolute best performing, and highest quality aftermarket turbo systems.

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'Stage-1' Wrenchrat™ SBC Twin Turbo System

Capable of 1,000+ Horsepower!!!

Wrenchrat™ Stage-1 Twin Turbo system for generation-1 small-block Chevrolet engines. The system utilizes premium 321-stainless hot-side, aluminum cold-side, all hoses, nuts, bolts, clamps and hardware are included. There are a few size options of turbocharger’s available with this kit, please call us so we can properly size the turbocharger’s to your application.

*2 - Stainless Turbo headers (with header bolts & gaskets)
*2 - Turbonetics standard-bearing Turbochargers (60-1 or 62-1)
*2 - Stainless Downpipes (with V-bands & bellhousing brackets)
*2 - 41mm Wastegates (with bolts and downpipe merge pipe)
*2 - Aluminum mandrel bent charge pipes (with 4-silicone hoses and 4 t-bolt clamps)
*1 - 2 into 1 wrenchrat merge (for charge pipes to merge into carb hat or EFI elbow. with silicone hose and 4 t-bolt clamps)
*1 - 50mm blow-off valve (with V-band)
*2 - Rubber 90 degree elbows (turbo inlet to air filters with clamps)
*2 - Air filters (with clamps)
*1 - Wrenchrat alternator bracket (with bolts)
*2 - Aluminum turbo oil return fittings (4-bolts, rubber oil return hose's and 4 clamps)
* Steel braided oil feed lines
*All nuts, bolts, clamps, silicone hoses and V-bands

Wrenchrat™ Price ~ $4,995

**Price subject to change depending on availability of parts**

 

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'Stage-2' Wrenchrat™ SBC Twin Turbo System

Capable of 1,000+ Horsepower!!!

Wrenchrat™ Inc. Stage-2 Twin Turbo system for generation-1 small block Chevrolet. The stage-2 system features upgraded Turbonetics ball-bearing, water-cooled turbocharger’s, Tial 41mm wastegates, Tial 50mm B.O.V. and a turbo water cooling system. The system utilizes premium 321-stainless hot-side, aluminum cold-side, all hoses, nuts, bolts, clamps and hardware are included. There are a few size options of turbocharger’s available with this kit, please call us so we can properly size the turbocharger’s to your application.

*2 - Stainless Turbo headers (with header bolts & gaskets)
*2 - Turbonetics Ball-bearing, water-cooled turbos
*2 - Stainless Downpipes (with V-bands & bellhousing brackets)
*2 - Tial F41 Wastegates (with bolts and downpipe merge pipe)
*2 - Aluminum mandrel bent charge pipes (with 4-silicone hoses and 4 t-bolt clamps)
*1 - 2 into 1 wrenchrat merge (for charge pipes to merge into carb hat or EFI elbow. with silicone hose and 4 t-bolt clamps)
*1 - Tial 50mm blow-off valve (with V-band)
*2 - Rubber 90 degree elbows (turbo inlet to air filters with clamps)
*2 - Air filters (with clamps)
*1 - Wrenchrat alternator bracket (with bolts)
*2 - Aluminum turbo oil return fittings (4-bolts, rubber oil return hose and 4 clamps)
* Steel braided oil feed lines
*  Turbo water cooling system (feed and return)
*All nuts, bolts, clamps, silicone hoses and V-bands

Wrenchrat™ Price ~ $7,595

**Price subject to change depending on availability of parts**

GTK Turbocharger Upgrade Option for 'Stage-2' System

GT-K 650 (66mm turbocharger's): +$780

GT-K 850 (72mm turbocharger's): + $1100

GT-K 1000 (76mm turbocharger's): +$1100

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BEFORE AND AFTER WRENCHRAT™ TURBO SYSTEM INSTALL DYNO NUMBERS

Test Engine 1:

The test vehicle already had the proper fuel system to support 1,000+hp of unnatural aspiration. The only changes made were timing and swapping to a blow-through 750cfm carb built by 'Carburetor Solutions Unlimited'. This test was done with smaller 61mm ball-bearing water cooled turbo's and a turbo friendly camshaft. This test engine was a complete budget build and unfortunately we have no before turbo install dyno numbers.

383ci SBC Stroker Test Motor specifications...

STOCK 4-bolt main 350 block
Scatt 9000 CAST Crank
Powdered rods (stock)
Probe forged pistons 8.4:1 compression
STOCK cast-iron heads cast #993
Victor Jr. Intake
CSU 750cfm blow-through carb
Solid Roller Camshaft: 541 lift...224/218 duration @ 50, 114-lobe sep.
TH400 transmission
12-bolt with 2.73:1 Gears

For this test we ran Premium pump gas (91 octane), water/methanol system from Snow's Performance and 14psi of boost...

LOW BOOST CHASSIS DYNO NUMBERS

Max rpm: 5,500
659 RWHP & 726 RWTQ

Low Boost Dyno Graph



For this test we ran 110 octane (sold from our local gas station), water/methanol system from Snow's Performance and 21psi of boost...

HIGH BOOST CHASSIS DYNO NUMBERS

Max rpm: 5,500
781 RWHP & 806 RWTQ

High Boost Dyno Graph

Test Engine 2:

This motor was built to represent a mild street motor that someone might already have in their car, including the naturally aspirated friendly camshaft.

383ci SBC Stroker Test Motor specifications...

STOCK 2-bolt main Chevy 350 block with splayed 4-bolt caps
Forged Stroker Crank
Forged H-beam rods
Probe forged pistons 8.4:1 compression
Pro-Comp 190cc aluminum heads
Victor Jr. Intake
CSU 750cfm blow-through carb
 Hydraulic roller camshaft:  541 lift...238/234 duration @ 50, 115-lobe sep.
TH400 transmission
12-bolt with 2.73:1 Gears

BEFORE TURBO'S CHASSIS DYNO NUMBERS

Max rpm: 6,500
305 RWHP & 319 RWTQ

Before Turbo Dyno Graph

After Wrenchrat™ SBC Twin Turbo Install

The test vehicle already had the proper fuel system to support 1,000+hp of unnatural aspiration. The only changes made were timing and swapping to a blow-through 750cfm carb built by 'Carburetor Solutions Unlimited'. For this test we ran larger 68mm ball-bearing water cooled turbo's to test response, with this engine setup and N/A camshaft the response was much lazier. The 63mm turbocharger's that are offered in the kit are a very good inbetween turbo that respond quickly and have the ability to make big horsepower numbers. With the proper turbo friendly camshaft this setup would have made more power. For this test we ran 110 octane (sold from our local gas station), water/methanol system from Snow's Performance and 24lbs of boost.

AFTER TURBO'S CHASSIS DYNO NUMBERS
Max rpm: 6,500
820 RWHP & 751 RWTQ

After Turbo Dyno Graph