Morning All,

 

Rather than ask stupid questions you have all been asked a million times i searched and found a very helpful post entitled "buying guide for 300zx".

 

That has gone some way to helping me understand the cars little nuances and expectations.

 

I do however have a couple of quick questions to try to establish whether the car is behaving "Normally". as i have no frame of reference by which to compare it to.

 

Its also worth mentioning that this car has a lot of aftermarket modifications.. all done by Z World in Tamworth according to the extensive service history.

 

A little background for you all.

 

Its a late 1990 Plate,

154k on the clock, Has had 3 cam belt chains the lates only 1k miles ago.

It has 4 corner adjustable suspension (tein i think)

De cat stainless exhausts.

Street Clutch done 3k ago.

Has a Greddy boost controller fitted and adjusted by Z World along with a new chip/remap etc. (has 3 settings ,Off,Low,Int.)

Stainless pipes under the bonnet, uprated brakes, discs, calipers, braided hoses.

Ally Radiator, and a few other things i cant remember right now.

 

Any help will be much appreciated.

 

Q1, I notice of the guide it mentions the dash boost gauge should read about 7 out of 14psi. The one on mine only goes to 7 however it easily goes full when on full throttle. ??

 

Q2, The oil pressure U.O.M is 3 dashes then a #4 1 dash then a #8 then 2 dash's. It goes up and down depending on engine conditions. IS this normal? What should it read?

 

Q3, Ive only owned it 4 days so im trying to establish what a "Normal" sound from the engine is... there doesnt seem to be any untoward sounds from the block etc, what kind of bad sounds do turbo's on there way out make?

 

Q4, Last one ta, the bumph says it runs on 10W 40 engine oil, but surely for a less viscous fully sythnetic oil that colled quicker would be better for the turbo's?

 

Like i said any help would be really appreciated.

 

Thanks

 

James

Morning All,

 

 

Q1, I notice of the guide it mentions the dash boost gauge should read about 7 out of 14psi. The one on mine only goes to 7 however it easily goes full when on full throttle. ??

 

Q2, The oil pressure U.O.M is 3 dashes then a #4 1 dash then a #8 then 2 dash's. It goes up and down depending on engine conditions. IS this normal? What should it read?

 

Q3, Ive only owned it 4 days so im trying to establish what a "Normal" sound from the engine is... there doesnt seem to be any untoward sounds from the block etc, what kind of bad sounds do turbo's on there way out make?

 

Q4, Last one ta, the bumph says it runs on 10W 40 engine oil, but surely for a less viscous fully sythnetic oil that colled quicker would be better for the turbo's?

 

Like i said any help would be really appreciated.

 

Thanks

 

James

 

 

Question one - JAP clocks have different units of measurement. 7 being the equivelant of 14psi or thereabouts. Hence your boost controller.

 

Q2 - The oil pressure will fluctuate with temperature and engine speed. Thats normal. No oil pressure is not normal, obviously.

 

Q3 - As far as I know you'll see the turbos are on their way out, rather than hear them - in the form of smoke coming from the exhaust.

 

Q4 - Not sure - check oilman's threads on this subject, there are a few very informative threads about. I think the balance is finding an oil which will protect your engine on frosty cold starts and survive the heat of the turbos, its quite a lot to ask of some dead sea animals.

 

HTH