Simms
Enthusiast
Well, I finally decided to bite the bullet and twin turbo my car. After a ride in a couple TT vipers, I was hooked. My Roe build was awesome, but I was ready for a change. Plus, anyone that knows me can tell you I can’t keep anything the same for too long. Since Macedo Motorsports has been treating me very well for the past 5 years I decided to discuss my goals with Larry.
My car is mainly a street car, but I wanted something I could take to occasional track days and any viper drag racing events throughout the year. I did not want a race car, and I did not want to blow out some big dyno number just to show everyone at the local car show… I wanted a car that was STRONG on the street, fun to drive, and reliable (yes, I know at these power levels things can break at any time. Been down that road before). Every turbo build I saw in Larry’s shop was different, so he worked with me on what I wanted and didn’t want as far as the build/budget. Here’s what was done:
· Garrett GT40R T-4 turbos
· Tial 46mm waste gates, Tial 50mm BOVs
· Hot parts all stainless, coated with 2000 degree coating.
· All cold parts polished aluminum.
· Custom manifolds.
· FMIC
· Forged ceramic coated dished pistons (8.5:1 CR)
· Billet rods (7/16 bolts), bearing, etc.
· ProGram billet main caps.
· LSM cam
· My heads from previous build were checked out.
· Stock crank keyed, ATI damper
· Upgraded lifter, pushrods.
· ARP fasteners and studs.
· Extrude Honed and polished stock intake.
· Baffled oil pan.
· Billet pulleys.
· McCloud Twin Disk.
· Ab’s wires.
· Woodhouse Mounts.
· 95lb/hr injectors/billet rails, etc.
On the waste gate springs (0.4 bar approx 5psi) = 650rwhp, 750rwtq.
8.5psi = 800rwhp, 900rwtq
For now, tuning was stopped at 13psi. With a very conservative 20 degrees timing and FAT 10:1 AFR, the car made 953rwhp, 1073rwtq on 93. SAE of 1.01 and 95 degrees outside.
The car was left fat for my weather conditions. When the car was delivered, it was only 45 degrees up here. We wanted to lean the car out on the road, but the cold pavement made that a little hairy. We did a little street tuning and the car runs fantastic and I couldn’t be happier with the build quality! Driving season is about over for me, so this spring we will fine tune it a little more up here and put it back on the dyno for curiosity.
Here are some pics I took the other day. I am far from a photographer and the lighting was bad, so please keep that in mind. Any of the Photoshop experts in here want to fix them up, be my guest (larger versions are in my gallery).
Buddy’s new Cobra just out of the wrappers.
My car is mainly a street car, but I wanted something I could take to occasional track days and any viper drag racing events throughout the year. I did not want a race car, and I did not want to blow out some big dyno number just to show everyone at the local car show… I wanted a car that was STRONG on the street, fun to drive, and reliable (yes, I know at these power levels things can break at any time. Been down that road before). Every turbo build I saw in Larry’s shop was different, so he worked with me on what I wanted and didn’t want as far as the build/budget. Here’s what was done:
· Garrett GT40R T-4 turbos
· Tial 46mm waste gates, Tial 50mm BOVs
· Hot parts all stainless, coated with 2000 degree coating.
· All cold parts polished aluminum.
· Custom manifolds.
· FMIC
· Forged ceramic coated dished pistons (8.5:1 CR)
· Billet rods (7/16 bolts), bearing, etc.
· ProGram billet main caps.
· LSM cam
· My heads from previous build were checked out.
· Stock crank keyed, ATI damper
· Upgraded lifter, pushrods.
· ARP fasteners and studs.
· Extrude Honed and polished stock intake.
· Baffled oil pan.
· Billet pulleys.
· McCloud Twin Disk.
· Ab’s wires.
· Woodhouse Mounts.
· 95lb/hr injectors/billet rails, etc.
On the waste gate springs (0.4 bar approx 5psi) = 650rwhp, 750rwtq.
8.5psi = 800rwhp, 900rwtq
For now, tuning was stopped at 13psi. With a very conservative 20 degrees timing and FAT 10:1 AFR, the car made 953rwhp, 1073rwtq on 93. SAE of 1.01 and 95 degrees outside.
The car was left fat for my weather conditions. When the car was delivered, it was only 45 degrees up here. We wanted to lean the car out on the road, but the cold pavement made that a little hairy. We did a little street tuning and the car runs fantastic and I couldn’t be happier with the build quality! Driving season is about over for me, so this spring we will fine tune it a little more up here and put it back on the dyno for curiosity.
Here are some pics I took the other day. I am far from a photographer and the lighting was bad, so please keep that in mind. Any of the Photoshop experts in here want to fix them up, be my guest (larger versions are in my gallery).
Buddy’s new Cobra just out of the wrappers.
Now go find some 'Busas and show them who's boss......
, Your viper Looks killer and congrats on the BAD A$$ Build. Hope to see it in person on a drive in the spring.
