So.....
Had the autorotor kit on my 95 NSX, and the extra 100hp made the car feel like...., well like it needed another 100 hp
After sufficiently lubricating the marginally famous TitaniumDave, talked him into letting me take over his motor / high boost SC project.
His lovingly handmade aftercooler and 2.3L whipple SC setup can be found ad naseum in previous threads:wink:, and I come in with the addition of a fresh short block from Shad with 9.5:1 forged pistons in addition to the headwork and cams already in the motor.
Out comes the motor with 170k miles to go in Dave's car to be sold to an unnamed but equally marginally famous prime member, where I hear it is currently making an insane amount of horsepower with the addition of a turbo (on a stock motor!) in hopes that it will be coerced into failing.
I'm going to add a few tricks to Dave's platform, mostly at my tuner's direction.
First, going with a Vipec stand alone and Zeitronix wideband. Upgraded the fuel pump to a Supra pump, and bypassed the fuel pump resistor.
Then, converted the stock windshield washer reservoir to a meth tank, and added a 1000cc meth jet upstream of the throttle body for additional cooling as well as added octane.
As the Vipec won't control a stepper motor drive by wire throttle body (ala stock NSX), coupled with the suspicion that a slightly larger throttle body would be a good idea if trying for 450+hp, went with a factory lambo throttle body (actually a bosch part), which is 75mm and controllable by the Vipec. Dave expertly reconfigured the SC intake snout to accept the new Throttle body, now just need to get it connected to the stock airbox.
Next, been toying with the idea of using a boost controller to limit / control supercharger boost, and noticed that whipple sells an interesting bypass valve actuator that is identical to the one that comes with the original SC kit, but with the addition of a port on the other side of the diaphragm that would open the bypass valve under boost, not vacuum. So, the vacuum port would still bypass the SC under no / part throttle, but the boost side will open the bypass valve under boost, much like a turbo wastegate.
My really crazy idea to play with after getting everything tuned, is to overdrive the supercharger with an even smaller pulley, but limit maximum boost to a lower level than the pulley is sized for (thus always bleeding some boost with the bypass valve). This would make full boost come sooner in the rpm range, at the cost of some increased parasitic drag, as well as some additional intake temp. We will have to see if it is worth the trouble.
Got the motor into the car today, now need to turn attention to the electronics. Will post some pics later, but there's nothing too exciting to see; mostly it's all been seen before on Dave's thread.
Hoping to see 500rwhp when it's all said and done, but we shall see....
Cheers!
- Craig
Had the autorotor kit on my 95 NSX, and the extra 100hp made the car feel like...., well like it needed another 100 hp
After sufficiently lubricating the marginally famous TitaniumDave, talked him into letting me take over his motor / high boost SC project.
His lovingly handmade aftercooler and 2.3L whipple SC setup can be found ad naseum in previous threads:wink:, and I come in with the addition of a fresh short block from Shad with 9.5:1 forged pistons in addition to the headwork and cams already in the motor.
Out comes the motor with 170k miles to go in Dave's car to be sold to an unnamed but equally marginally famous prime member, where I hear it is currently making an insane amount of horsepower with the addition of a turbo (on a stock motor!) in hopes that it will be coerced into failing.
I'm going to add a few tricks to Dave's platform, mostly at my tuner's direction.
First, going with a Vipec stand alone and Zeitronix wideband. Upgraded the fuel pump to a Supra pump, and bypassed the fuel pump resistor.
Then, converted the stock windshield washer reservoir to a meth tank, and added a 1000cc meth jet upstream of the throttle body for additional cooling as well as added octane.
As the Vipec won't control a stepper motor drive by wire throttle body (ala stock NSX), coupled with the suspicion that a slightly larger throttle body would be a good idea if trying for 450+hp, went with a factory lambo throttle body (actually a bosch part), which is 75mm and controllable by the Vipec. Dave expertly reconfigured the SC intake snout to accept the new Throttle body, now just need to get it connected to the stock airbox.
Next, been toying with the idea of using a boost controller to limit / control supercharger boost, and noticed that whipple sells an interesting bypass valve actuator that is identical to the one that comes with the original SC kit, but with the addition of a port on the other side of the diaphragm that would open the bypass valve under boost, not vacuum. So, the vacuum port would still bypass the SC under no / part throttle, but the boost side will open the bypass valve under boost, much like a turbo wastegate.
My really crazy idea to play with after getting everything tuned, is to overdrive the supercharger with an even smaller pulley, but limit maximum boost to a lower level than the pulley is sized for (thus always bleeding some boost with the bypass valve). This would make full boost come sooner in the rpm range, at the cost of some increased parasitic drag, as well as some additional intake temp. We will have to see if it is worth the trouble.
Got the motor into the car today, now need to turn attention to the electronics. Will post some pics later, but there's nothing too exciting to see; mostly it's all been seen before on Dave's thread.
Hoping to see 500rwhp when it's all said and done, but we shall see....
Cheers!
- Craig
)
