Twin Precision 62mm Turbo’s
Edelbrock 2300 Supercharger:
Blue Line = 12psi pulley
Green Line = 14psi pulley (falls over due to blower housing restriction)
Red Line = 12 psi pulley + 75 shot of Nitrous
I entered my new Drag car for the Holden vs Ford Drag racing event on the Anzac long weekend. As it’s a new car and still requiring Tech inspection, I wasn’t able to do too many quick runs, but for it’s 2nd event debut I am extremely happy with it’s progress.
The car is a Twin turbo 410ci Darton Sleeved LS2 in a VX Berlina Shell
I had someone from a local car forum I’m on ask me about taking a look at his civic which he races regularly at Wanneroo Raceway as he wasn’t happy with a recent tune-up after a cam swap.
So with some spare time on my hands today we put it on the dyno. What was apparent straight away was the car was running extremely rich from idle until “VTEC” was activated around 6000k rpm & was lacking in power at all rpm’s below.
Considering this is the first time I’ve ever done one of these motors/ecu combo’s & it only took a few short hours to sort out. We got some pretty good gains below the vtec change over point along with gains in fuel economy both at wide open throttle and normal throttle points.
I spent some more time this weekend playing with the Cruze on the dyno again after installing a de-cat pipe along with the bigger injectors for running E85.
With the new pipe in, exhaust note & noise is still the same. At least within the car.
Tuning wise it seems to have helped improve the power in the top end from fading, even though boost is still dropping away.