djr81

Attitude? FFS. I said I had engine issues. I said I didn't want to use CP's again. I did not say the cause of the issues were the CP pistons or that there was anything wrong with the brand. Happy?

Some dont (Mahle most prominently) but that is not the issue and it is easily fixed. Please don't play 20 questions about the motor just stick to the piston availability thing.

Hmm they make .25mm oversize too. Not seen that elsewhere.

Thanks for the info. I dont want to go into what may or may not have gone wrong in an interweb thread. I have an N1 block ready to go. Just wanted to see what was actually available and used rather than listed and non existant.

Despite all available evidence being to the contrary I am not a complete idiot. I understand cps reputation. None the less I would still like to establish who makes forged pistons in 86mms because from what I can see it is a much smaller number than for oversized pistons for obvious reasons.

Yes. Tomei were my start point but I couldn't find a reference to an 86mm piston, only oversize ones. Didnt look at ACL or Nitto (Not that the NItto list has an 86mm size anyway) because I didnt want to use them. Have CP pistons currently and given the issues I have dont want to go back there either.

Sorry brain fade with the numbers - 86mm. Anyway does one of you smartarses have an answer?

Probably a dumb question but does anyone other than HKS make a forged piston for a standard bore RB26?

Well said. Lets ignore the case when the pressure relief is seated because that is at low rpm where no one really cares and it complicates the explanation. The point is if there are two pumps with different sized rotors etc and similar pressure relief arrangements they will flow the same amount through the same motor given the pressure relief measurement is the same. Oil pressure is a measure of how hard it is to pump oil through a system. It is not a pump property.

Different pump designs - positive diplacement and centrifugal need to be thought of differently. Unlike a centrifugal pump a positive displacement pump's speed is the sole arbiter of its output. It will pump a certain amount of fluid (oil in our case) per revolution almost irrespective of the pressure it is pumping against. However, different pumps give you different amounts of oil because their gear designs are different. Obviously a smaller pump will move less oil per revolution by design. What happens to the pumps output is dictated by the pressure relief arrangement and the engine design (bearings clearances, oil galleries etc). The oil can only go in one of two directions - out the relief or through the engine. The lower the relief spring constant and seat force (which are added, obviously) the more oil goes through the relief side of the pump and the less goes through the motor. By increasing the pressure relief on the pump you force more oil through the motor. It is difficult to compare to turbos because the waste gate functions in an analagous manner to the pressure relief device on an oil pump save for the fact it is on the turbine not the compressor

They run out of Ferrari branded Segway's? I hope that never happens. Basically it looks like a bunch of randoms trying to cash on on Brabhams name. Not unlike Lotus last year, but worse.

http://www.classicteamlotus.co.uk/content/shop.aspx?sec=23

No more Naubert. Hamo will be unhappy.

There is a decent article in the next sea freight edition of motorsport magazine (As opposed to air freight). The mag has it, in all its aqua coloured glory, on the front cover. Oh and Mauricio Gugelmin was massively under rated. Also Ferrari should forever be ashamed of what their sht car did to Capelli's career. Also, this. www.youtube.com/watch?v=Mp90Z61Y9nQ

Well that one does. There are only two sizes for use with the Brembo calliper at the rear and only one at the front. The larger of the two rears is the R34 V-spec II NUR N1 fkn blah size which arent common anyway.

There are several threads about this. The bolts on the Brembos are a dfferent pitch from the Nissan ones 1.5mm instead of 1.25mm. The backing plates will need trimming/removing (but be aware of the prximity of the upper outer sustension link to the rotor) and I had some new lines made up as I was not happy with the ones that came with the callipers. See this thread for other stuff: What Size Bolts Are Required For 34 Gtr Brembo's?

The falcon seat will suck teh balls in comparion to the GTR one. But a proper seat and harness is a whole other deal.

A diff cannot change a camber setting. So no, it is not true.

The Sydney Morning Herald aside when a wheel hits something hard enough it should not fracture into two or more pieces it should buckle. I have seen many buckled rims after big hits but the fractures on Rotas and similar just leave me shaking my head.

Yeah there are two bolts but the inner one is about 150mm long and fouls on assorted bits of bodywork when you try and install it. Easiest way is to loosen the bolts on the inner bracket until you can get the bolt in - on the drivers side anyway. Hard to do that on the pasenger side as the ABS gets in the way. If you have an adjustable outer bush there are two bolts to put in which are difficult to align and get started on the threads. Basically if you do the inner first the outer is a %^*@ to get in and if you do the outer first the inner is a (%*@ to install. Anyway it is quite a bit of messing about and more than just an hour of work. Then you need a wheel alignment.

Isnt the easiest answer is to find a pair of adjustable arms that can go to 4 degrees? Because I can promise you changing suspension arms just for a track day is a major pain. The bush flogging out problem is because of two reasons (mostly) The compliance in the suspension is in the castor rod. If you put rose joint rods on it you lose most of the compliance. It then gets transferred to the upper bush. Which gets trashed really quickly. The mounting points for the inside of the upper suspension arm need to be rotated - this is what you get when you buy a Nismo bracket. Also the Nismo kit gives you a longer lower arm and a shorter castor rod. Unfortunately it is $$$$$'s.

For my ten cents worth I think there is a common misunderstanding that alot of people have. Put correctly any tyre that is producing lateral grip is generating a slip angle. Also steering a car on the throttle is a common technique in just about all forms of motorsport. It is still common to see cars pointed well inboard of the apex of the corner due to the slip angles generated by front and rear tyres. Admittedly not as much as the olden days when slip angles used to be much bigger but enough. It is most pronounced in low powered categories with no downforce eg the formula vees and fords do it alot.

Tomei have an external adjustment for the bypass. So they are better in this respect to the other pumps. You need a large capacity sump to go wth it as well as the restrictor as mentioned. Then make sure the blow by is under control as at the end of the day that is what keeps the oil in the head.