The goal for the motor is 300whp before nitrous and is entirely achievable. Right now I am doing mostly chassy work on the sunbird the motor is going in but I have some pretty cool projects going on that some of you may like to see.
The motor before the most recent tear down:
In this picture I was using a Nissan 16v cermaic ball bearing turbo from an RB20 skyline. On the left, that is an MSD 6al, on the other side of that strut tower are the nitrous solenoids. The box on the right of the picture is a Multi-step retard unit from MSD pulling 3 degrees of timing for nitrous. This was using a freshly built OEM bottom end fully balanced and a freshly built OEM head with a full intake port and polishing and an exhaust polishing. The throttle body is from a 2.3 Quad 4. It's 56mm and uses the same TPS and same stepper motor for the IAC so the stock comptuer could control it. There isn't a whole lot else that I feel worthy of noting with the old set-up. I ran 11psi, stock injectors and a heft front mount intercooler.
The intake ports:
Bottom end:
Getting ready for the next step in the build:
Sitting in the empty cowl panel is Megasquirt V2.2. The stock OBD1 comptuer is very capable once you start messing with the chip, but I am very formiliar with MS tuning so I chose to go that route instead. You can also see the new turbo in this picture being test-fitted into it's new location (custom top mount equal-length turbo header being made.) This picture was taken prior to rebuilding the turbo.
Durring the build:
I have gutted everything from the car that does not make it faster. The transmission is now a 5spd Getrag Every wire in the car has been removed. The only electronics staying in the car are headlights, taillights and turn signals.... then of course all of the go fast goodies.
Added an idle air circuit to my megasquirt board:
Gutted:
Checking nitrous distribution clearnaces:
I have lots more pictures. If anybody has questions feel free to ask.
Right now I am going to get all of the tuning down and set everything up with the computer on 10psi and spray 65hp ans see how that holds up on an oem bottom end. I will be building another bottom end with forged rods and some significant crank work. I have head studs and an MLS headgasket waiting for that. A DIS conversion is in order as well. After all of that it is just going to be a matter of taking it to the dyno and tuning/cranking up the boost. My ultimate goal is to hit 500hp with roughly 100hp of that covered by nitrous. A DOHC conversion will probably be needed. 500hp should be enough to take this feather-weight shell into the 9s fwd.
