djr81

Actually what shits me is that if there is more than the normal amount of carnage it is taken to mean they need enough tougher laws/enforcement. Ofcourse a less than normal amount is taken to mean their tougher laws are working - hence the need for even more tougher laws...

Nah, mate. I promise you it is not. Actually what it is mostly about is having a state government with its head stuck so far up it's arse that they keep on delaying the Mandurah bypass simply because they believe they can get more political mileage arguing with Johnnie Howard's lot that actually doing something for the country residents that they recently disenfranchised. Fkn $2 billion a year surplus & they "can't" afford to built a road worth a few hundred million. A don't get me started about what they have done to the speed limits out the back of Donnybrook because of all the log trucks now running up to Bunbury. Why more log trucks? Because the government allowed a perfectly good railway line to be shutdown. How many people did that decision kill? :laugh:

Read it again. I said ONE OF, not THE ONLY. Clearly it is about both & many other things besides. Between where I live & Perth there have been any number of new housing developments put in in recent years. The result? Speed limits have been steadily reduced from, say 110 to 100, 80 to 70 etc etc etc. If you drive anywhere in country areas you will inevitably have speed limits reduce as you get near a town & the increase afterwards. As for SK suggestion of speed limits being tied to vehicle volumes. Be nice, but the closest anyone will ever get is the police acting like complete Nazi's when people want to go away for any given long week end. Not sure that is quite what you mean...

A couple of points spring to mind. One of the most important parameters for the engineers designing roads & therefore defining the speed limits is traffic volume. The more traffic the lower the speed limit. We get it alot around here. Basically the sequence is: Trafiic volume increases. Govt refuses to spend any money on road upgrades. Accidents become more frequent. Speed limit gets lowered. Approximately 6 billion speed cameras turn up 5 minutes after the speedlimit changes. A win - win situation for our beloved government as they don't have to spend money on roads & they get more revenue from speeding fines. Yay. Second point I would like to make is regarding driver training. I once worked for the vehicle devision of our State Energy Commission. At one stage they sent everyone out for driver training. The short term result? More accidents as everyone suddenly thought they were Nigel fkn Mansell. Just remember people: The track is the ONLY place to prove your talent. Having talent won't necessarily prevent accidents, least of all if you are speeding.....

Alliance rim repair.

Well, essentially you can't unless you go out & buy some adjustable pulleys. Do a search you will find an endless amount of discussion on that particular subject.

Um, cam timing, not ignition timing. If you want to check the cam timing you need to take the belt cover off & check that the marks on the belt match the marks on the pulleys.

Hey that is not fair, Richard. I fixed my post before you fixed it for me. Beat you by a minute...

A N/A exhaust will, as a rule, be louder than a turbo exhaust. As a guide my exhaust is 90mm & I literally cannot hear it over the tyre noise. By the way, an exhuast is too big if you have to check for the cat sleeping in it before you start the car...

It makes a difference on two counts: 1. If the pistons are not standard they may have a different compression ratio and also the new engine may have a thicker head gasket (to give but two examples) In short the number shown in the Nissan manual may no longer apply. 2. If it is only two years old it should still have good compression. Your first post read like the test was done only recently on this motor. But then you have said that you are not sure which motor it was done on? If you are having problems with the motor (Are you?) then it sounds like you need another test done as the numbers are indicative of an old, tired motor. What I cannot explain is why the numbers are so close together. Usually the lower they are the further apart (cylinder to cylinder) they get....

Yes. No. You basically have to rebuild the motor. To answer the question implicit in your original post: Testing a modded (Stock internal) motor for compression should give the same numbers as an unmodified motor. BUT When operating at full output the BMEP of the modded motor will obviously be higher.

The compression ratio is a physical property of the engine. Broadly think of the volume in the cylinder when the piston is at bottom dead centre & compare that to the volume in the cylinder when the piston is at top dead centre. You (for an Rb) will get a number about 8.5 to 1 or slightly higher depending on which Rb variant you have.

Have a look at the J-Spec web site for the same car. Says it is not a V-Spec 2...

The car in question is very definately straight. Part of the attraction was that it was in everybodies interest to be a good, straight, unrusted car. VRfour, I didn't think that DI's necessarily needed reinspection? Last indication was that the turn around was about a month for the DI's. Unfortunately that info is now stale as it was more than a month ago.....

Yeah thanks for the reply Richard. I read the other post earlier, but thought I would ask because my instance is a little different. I know the car has been inspected by Dotars, so therefore the compliance work must, by definition, be largely complete. I have seen the car with partly completed modifications, but that was almost a year ago. I don't distrust the workshop in question. From what I understand DOTARS have a policy of not telling anyone anything about timeframes. If this is typical, maybe a more general warning about this sort of delay needs to be posted for those offered cheap/free compliance for a test car?

As have many others, I have imported a Skyline ex Japan. (it reached Australia in April 2005) Nothing earth shattering there, then. The arrangement was that the vehicle was to be used as a proof of compliance (not 100% sure of the exact term) for its model type by a local RAWS. From what I have been told (& I have no reason not to believe this) the initial inspection was done in March of this year. Atleast part of the delay was simply waiting for DOTARS to bother turning up (estimate this was 4 months or thereabouts) & the other part was waiting for the workshop to get it's submission together. Apparently the response to the discussion items was a good couple of months ago. I understood that the whole process was not allowed to take more than 12 months from time of importation, yet here we are almost 15 months later & still no car. My questions are these: How typical is this kind of timeline? At what point do DOTARS order the the car be re-exported or destroyed?

Animosity between who, Roy? From what I have experienced it is pretty much human nature for people to either look for an excuse for their own (bad) behaviour or at minimum point to someone else doing the same. I think that to a very large degree people get upset because the new laws are absolutely punitive. Essentially they are a damning indictment of the failure of the various government bodies (including the police) to do something effective about lowering the road toll. So the best they can come up with are these nonsense laws & ever escalating fines. At the end of the day is a burnout sufficiently dangerous (& I am not advocating anyone do them because they are fkn pointless) or antisocial to warrant the application of a fine that may be the equal of $25,000 or more, ie the value of your car? What else would you have to do to warrant that kind of punishment? I only hope that one day all the do-gooder safety nazis implode in a cloud of self righteousness. Grant Dorrington first.

Damn, I thought that was in English.

Beg pardon?

Here was me saying we had to be careful & then wasn't careful enough. There are two similar sounding terms which have two distinct meaning when related to fluid dynamics. Pressure loss & pressure drop. Pressure loss is a measure of the energy loss per unit volume of fluid. It is also known as the stagnation pressure loss. It represents the loss of energy per unit volume of the fluid that it suffers when being transported from one end of a piping system to another. The pressure drop is a measure of the change in pressure between two points. This can be either positive or negative. A typical example is flow moving from a smaller pipe to a larger one. Typically the pressure downstream is higher than that upstream on the back of a lower kinetic energy (ie velocity) component of Bernoulli's equation. In a pipe system comprised of different diameter pipes the pressure loss will be different to the pressure drop. So, in summary. EVERYONE is correct. The fuel rail will have a pressure loss over its length, but can also have a negative pressure drop (ie a gain) due to different pipe diameters at the different measuring points. I think I need to have a lie down now.

The Reynolds number is a measure of the turbulence of the flow within the pipe (for a fuel rail). A low Reynolds number (<1000 or thereabouts) indicates laminar flow (less common for fluid in pipes) and a large number (>10,000) indicates turbulent flow. The Reynolds number is dimensionless. For our case (a fuel rail) we have: R= fluid density*fluid velocity*pipe diameter/fluid viscosity.

This is getting very cofused in an awful hurry. To clarify (I hope). Pressure is always higher at the pump than at the pressure regulator. It has to be otherwise the petrol will NOT flow towards the regulator. (At the end of the day you can be sure that shit don't flow uphill)

There are two fundamental problems with the "Hoon" legislation. 1. Our beloved state government(s - it is happening elsewhere too) are deliberately targetting (vilifying) car enthusiasts as a community. For every bogan doing a burnout in a Commode there will be some self righteous copper who wants to hassle people just because they happen to take pride in their car. 2. The penalties imposed are a very long way from being proportionate. Now I for one hate people doing burnouts. Frankly it gives me the shits. BUT, last I heard no one had ever been killed doing a burnout. Can anyone else offer up an example of an offense that carries with it the equivalent of a $25,000 fine? Lastly, for my 10 cents worth, I would refer everyone to the Lyrics from Frenzal Rhomb's song "Who'd be a cop?"

A turbo anything in a clubman amounts to a well scary ride. Best advice is to make sure you understand what the laws are in your state relating to home built cars. Also, it will take longer than you think. (always does) By the way, the photo is of the ex clubman motor after number 4 cylinder chucked a leg out of, um, both side of the bed & the sump aswell. If you look closely you can see right through the block.

The other suspect is tyres. I (once) had some el cheapo rears (mis)matched to some good fronts. Made the old dear oversteer like a cat on lino & also lock the back brakes. If you don't find anything untoward it might pay to chuck the old rear pads in. (Or atleast a set with a lower frction coefficient, DS2500 should be about 0.5, so try 0.45 or similar) Are you confident you bedded in the DS2500's properly?