Scared????

[Dragon18]

Hay guys? iam getting my car soon you proberly all know 180sx

hhe know i have had some work with cars but not a lot with the new sorta car's i remeber back when i was young and changed the motor over in our sigma those were the days with my old man hahaha

well time has changed and i really havnt done much to cars

since this is my first car fuel injected ecu turbo heheh

iam scared about touching the damn thing

for example if i were to do modifications nothing to big. and service and afew other cool things?

iam just scared i will stuff up somthing and end up costing me money

?

did any of you guys go through this and what do you reconmend hehe +)

THanks

Cheers

[Guest Nismo_Freak]

I recommend you grow some nuts... j/k. Dont worry man FI is easy shit. Do the simple things first, as you should know:

Exhaust (its just alot of cussing and bolts to remove)

Intake (rip out plastic box crap... put on adaptor... hose clamp filter on)

Downpipe (remove crap stock one from turbo ... bolt on new one)

BOV (remove stock by-pass, weld flange on, mount BOV, hook up vacuum lines)

Intercooler (remove stock "heater", remove all piping to be replaced, hose clamp new piping, relocate battery to trunk, remove bumper, cut bumper, fit IC, mount and secure IC, and hose clamp cold side piping to TB)

Oil (some good non-dino oil aka synthetic)

Now its the boost controllers and electronics im sure you are afraid of. They have instructions and alot of people know how to install them, fairly straightforward. Its easy if you get the harnesses.

[Guest Nismo_Freak]

Just in case you dont know how the FI systems work and since Im kinda bored ill post this.

This is how the FI works:

1. Air enters filter

2. Air metered by MAS (Mass Airflow Sensor)

3. Air makes way through turbo, through IC, into TB, into manifold

4. Signal from MAS tells ECU to put X amount of fuel cause the engine metered Y amount of air

5. Signal sent from ECU to Injectors

6. Injectors spray X amount of fuel

7. Fuel and Air atomize

8. Valve opens

9. A/F mixture goes in ... gets nuked

9a. If detonation then knock sensor tells ECU "Hey your shiit aint working, its pinging", ECU pulls timing (retards timing)

9b. If no detonation then all is well, knock sensor = happy

10. Exhaust gas exits

11. Runs into turbo

11a*. If WOT most exhaust gas spins turbine

11b*. If not WOT most exhaust gas is wastegated

12. 02 Sensor measures remaining 02 levels in exhaust gas

13. 02 Sensor sends signal back to ECU

14. ECU reacts, more fuel if alot of 02 present, less fuel if low/no 02 present.

15. Exhaust exit out giant grapefruit launcher exhaust

* Depends on load, RPM, wastegate settings, actuator settings, etc.

Timing is also electronic. Turbo cars often have pretty elaborate timing/fuel maps on their ECUs to prevent detonation and to make power.

Tips before modifying car:

1. Check Timing (includes timing chains, check for slack)

2. Check ECU for codes (you will see a "Check Engine" light, remove driver side-right kick panel, follow instructions on ECU to put in diagnosis mode)

3. Fix any mechanical/electrical problems with the car

4. Verify Compression (the SR should be around 180psi I believe, anything sub 170 needs to be looked at)

5. New fluids (oil, coolant, etc.), new belts wouldnt hurt

6. Verify that Turbo has no shaft play

Now you should have a well running SR20DET ready for anything you throw at it.