Finished another black Viggen. This time a Flex fuel vert with Gt2871 on a top mount manifld with the aim of the best street car possible. Upgrading from 18t6cm Flex fuel. There were some requirements. Needing to stay away from the Wheel hop inducing chassis flex of the Vert and required to have the same performance in the Desert during the summer all while being able to run a nice clutch.
The power looked like this on E85 as I started fine tuning the boost to get the Tq to be as flat as possible.
![Image]()
The result was a car on the road that just pulled harder and harder without the massive wheelspin of 400+ tq., Thats not to say this would not waste the tires I mapped it up to a flat 20psi so it would be safe. (Also room to make a race ecu for track day on slicks) All without requiring a metallic clutch. I though the car was sneaky on the power side, The customer Disagreed and said there was no sneaky about it. Just a bit of :shock: Followed by
One tricky bit was running it on the dyno with no fans back to back pulls to get the air temp up there near 100f while the room was in the 60s.
![Image]()
Oh and this is through a stock airbox/paper filter and a BSR 2.5" catback. This kept things quiet with the ragtop on the highway. The stock Dp/CB connector was replaced with a 2.5" v-band for increased flow.
Made sure all the Tq maps were done so that I had best control of power for first and second limiter as well as boost control to limit the Airmass on Gasoline as needed.
I have some more videos will work those up one of these evenings.
The power looked like this on E85 as I started fine tuning the boost to get the Tq to be as flat as possible.
The result was a car on the road that just pulled harder and harder without the massive wheelspin of 400+ tq., Thats not to say this would not waste the tires I mapped it up to a flat 20psi so it would be safe. (Also room to make a race ecu for track day on slicks) All without requiring a metallic clutch. I though the car was sneaky on the power side, The customer Disagreed and said there was no sneaky about it. Just a bit of :shock: Followed by
One tricky bit was running it on the dyno with no fans back to back pulls to get the air temp up there near 100f while the room was in the 60s.
Oh and this is through a stock airbox/paper filter and a BSR 2.5" catback. This kept things quiet with the ragtop on the highway. The stock Dp/CB connector was replaced with a 2.5" v-band for increased flow.
Made sure all the Tq maps were done so that I had best control of power for first and second limiter as well as boost control to limit the Airmass on Gasoline as needed.
I have some more videos will work those up one of these evenings.
