by dr20t » Sun May 25, 2014 11:12 pm
So after some research and planning today, I'm 90% sure its gonna be giggle gas.
Will be a wet system, jetted for 50hp with the nozzle mounted just before the throttle body. Bottle will be mounted in the spare wheel well, and plumbing will go underneath the car and into the engine bay. Will have two arming switches - one for power to the solenoids via a dash mounted switch, and another dash mounted switch to open the bottle tap remotely. The system will be setup to spray NOS only if both of the above switches are in the ON position, and only once the following conditions are met/detected:
- minimum 2500rpm
- WOT at the throttle plate (100% throttle)
- 1 psi positive boost at the manifold
- 43.5psi fuel pressure at return line
So long as the above conditions remain, the 50 shot will then stay active until one of the following two things happens:
- Boost reaches 10-14 psi (haven't decided where exactly to set it but it will be at that range)
- Revs are greater than 5000rpm
So if at any stage I switch off any switch in the cabin, throttle reduces from 100% open, fuel pressure drops below 43.5psi, or boost or revs reach the lower or upper limits above, then the system deactivates.
Will be using a boost pressure switch, wot switch and fuel pressure switch and rpm window switch to make the above happen, in addition to the standard nos kit. Will also install a bottle heater which references bottle pressure in the thermostat, so once it reaches 950psi inside the bottle it switches off to avoid over pressurising.
This should get the turbo singing well and truly before the 3400 stall limit of my auto on the line, and provide the added bonus of loading up my engine on the line and therefore bring the torque curve lower down the rev range to get me out of the hole quicker.
The auto should be ok with this, but I think the next weakest part is the rear diff or the rear driveshafts. Thus why I think 10psi should be plenty to leave the line with.
Mick