Rolls

Personally I like to use a mixture of 1 part vegetable oil with 2 parts castrol edge 25w-50.

Yes they can. We have to suck it up, there is nothing wrong law wise with what he did, sure it was a total cock move but there is nothing that we can do about it.

It is simple, if you can afford a new motor for the price of your oil, then don't do it lol.

You are right, I'm guessing Simon isn't running bilsteins or a decent shock though, didn't he say he was running a jap coilover unit? Even the 'good' brands are still average from what I've heard. How does the tein hold up compared to a new bilstein? Not first hand information but people told me that there was no comparison, how true is that?

If you are running true semi slick and only driving it on a race track I agree, anything else and imo the slightest bump and you'll be getting wheel spin. What dampeners are you running? The issue with most 8/6 rates is they come in a coilover kit with crappy shocks.

You can run twin scroll with a single gate, just need to merge the two scrolls pipes into a Y pipe with a bit of distance on it so it doesn't allow them to merge the pulses going into the turbo.

The issue isn't the parts, it is who puts it together. Do what was suggested earlier, go to a workshop with a known reputation and get them to do everything and buy a motor with a warranty. If you go to 10 different places with parts they don't like no one will warrant it and there is a high chance it won't work as everyone 'only' did their part and can all blame each other when it breaks, they also won't have any sense of responsibility as they aren't building a motor, they are just doing one small part of it. You also don't have to research what parts to use and possibly get it wrong, they will have a tried and true recipe that they know works and will provide a guarantee with.

making your car go faster and pulling hotter biddies should be motivation! haha good luck : )

At that weight you don't even need to exercise and you can drop 20kg without even a proper diet, it is easy! go for gold man!

140kg you fat bastard!

It sounds more like a simple machining tolerance that wasn't to spec causing them to be out of balance. Manufacturing a turbine wheel isn't so complex that you have to build your own foundry with your own QA to get it right, you just find a willing manufacturer. The obviously did their R&D on limited runs, found they worked fine, then had to find a different manafacturer to produce the 1000s that they required, the new manafacturer didn't conform to spec, hence failures. Makes sense to me.

His point was it most likely isn't financially feasible to make them yourself, it is much more cost effective to sub contract, unless of course you are planning on making billions of them.

There was an issue with the rear wheels not being built to spec, the wheels would grenade taking the shaft with it. They have moved to a different factory which builds the wheels to spec and apparently has no issue.

Why 20psi, why not keep it under 18psi? You are guessing, really need to put it on the dyno and see how it behaves, if it doesn't detonate or get hot then what is the issue?

You been defected already? With the rims you need to calculate the gain in track, the gain in rim size and compare to standard. The modifications laws give a percentage larger than stock, do some research and you can find all the documents, or call up regency and they will tell you.

what is a coilover cover?

just search for 'racepace' lol...

http://www.skylinesaustralia.com/forums/index.php?app=core&module=search&do=search&fromMainBar=1

Because most people haven't used them before so they can't give you your opinion. This is the most crucial step, finding a builder/assembler who knows that they are doing. I would bite the bullet and go with race-pace, their customers engine do all the talking.

Agree you have to test everything, was just curious what the process was. Do you do any calculations or anything or do you just tweak the parts and note the results?

Do you always develop by trial and error?

It doesn't have to be fixed, you just can't be able to lower it below legal height, it can be adjustable above the minimum height. If they let it through it doesn't mean it is a precedent either, they might have just not cared that day. You can have adjustable kits, you just typically can't have rose joints, unless the manufacturer provides a list of all materials used and you have them crack tested, then you could get an engineer to argue they are just as strong if not stronger than a standard bushing set up.

They do it for a reason Interesting discussion on rose joints here http://www.performanceforums.com/forums/showthread.php?67181182-quot-Rose-quot-joints-a-curly-question

You can't engineer a lot of that stuff as adjustable arms are rose jointed etc, simply can't be done. Same with adjustable coilovers, need a perch welded so that it can't be lowered to an illegal height.

Need a full spectrum emissions test, called the IM240, you will need low boost, a fantastic CAT convertor, O2 sensor working and all the O2 feedback working, and the tune to be perfect, too rich and you fail on carbon monoxide, too lean and you fail on nitrogen compounds. You will want a competent tuner with a gas analysis machine to get it fairly right and then come along and tweak what needs to be tweaked when you fail the first time. It is around $1k a pop when you go so you want to get it right. Need brakes upgraded and they will probably want to do a lane change test and a few other things. Adds up very fast.