Hello!

 

I'm a finn living in Germany and I like to drive fast.....

 

I just bought a european model 300ZX Twin Turbo automatic yearmodel 1991 with low 99 tkm........ to tease Porsches.... BUT:

 

I have been trying to reach top speed in several occasions, but it gains max 240 km/h...usually only 220-230... (that I can do with my VW turbodiesel too...) secondly 0-100km/h times (hand timing up to 105km/h in speedometer scale) it goes in 7,6-8,0 sec...isn't that too slow too??

 

The engine sounds really excellent, idle around 850-900, no odd sounds, only injectors faint knocking, no shaking.... it sounds almoust like V8....

 

The automatic gearbox is also working well, changing the fourt speed at around 200 km/h in full gas acceration (rps around 6500)

 

There is absolutely no leaks...except little hissing sound from right exhaust manifold (or somewear near) after turning off hot engine (like some water would be poured on hot turbo kind of sound)

 

The turbo pressure goes up to around 0,58 bars and motor heat is in good range all the time (little bit below middle area at +4-10 C outside temperature)

 

Could it be possible that one cylinder would be out of order...can the engine really sound so good in that case????? In that case what would be the most likely broken part.....ignition or injector?

 

Any hints, ideas check ups would be greatly appreciated!!!

 

By the way...will 100 watt H3 lamps break my reflector lights? The 55 w were giving as much light a a bad flash light..

I have been trying to reach top speed in several occasions, but it gains max 240 km/h...usually only 220-230... (that I can do with my VW turbodiesel too...) secondly 0-100km/h times (hand timing up to 105km/h in speedometer scale) it goes in 7,6-8,0 sec...isn't that too slow too??

 

Unless your car is chipped, the top speed is limited to 250km/h.

7-8s for 0-100 is (too) slow for an automatic.

 

There is absolutely no leaks...except little hissing sound from right exhaust manifold (or somewear near) after turning off hot engine (like some water would be poured on hot turbo kind of sound)

 

That's probably water from the aircon drain dripping onto the exhaust.

 

The turbo pressure goes up to around 0,58 bars and motor heat is in good range all the time (little bit below middle area at +4-10 C outside temperature)

 

I presume you have an accurate boostgauge to tell max boost is 0.58 bar ?

The stock temperature gauge is near useless.

The coolant could be at boiling point and the gauge would be still in the middle position.

 

By the way...will 100 watt H3 lamps break my reflector lights? The 55 w were giving as much light a a bad flash light..

 

Yes, 100 watt lamps will damage the chrome from the reflectors (due to excessive heat).

I noticed this after converting quite a headlights to xenon/hid and the lights that had been running too high wattage lamps all had reflectors that were beyond repair (chrome had burned off)

If you want better lights, convert the lamps to Xenon.

By the way...will 100 watt H3 lamps break my reflector lights? The 55 w were giving as much light a a bad flash light..

 

You can upgrade your hibeams to Osram SilverStar and the dipped beams to PIAA SuperWhites. It makes a huge difference to your lights and it becomes possible to drive at night without nightvision goggles. If you got the money, go for HID conversion kit, the easiest way is where you replace your bulbs with HID bulbs and attach the HID electronics just behind your light.