Rolls

Total tractive effort at the wheels yes, but an engine dyno shows corrected and calculated engine torque so that won't change. This is why you see diesel engines with really short gearing or 20 gears as you can make up for lack of torque by gearing, and they need all the tractive torque possible with their heavy loads, as mentioned you can't make up lack of power though. As always trying to picture this and understand what is going on is really complicated and confusing, took me a year or so to get my head around it. Great article about it here http://autospeed.com/cms/title_Power-versu...48/article.html

that is like saying you need a 100hp motor to drive you to work so you get a 1000hp motor which they stop producing, then complain that the closest motor for the same price is only 900hp, end of the day both are massive overkill and the difference will be completely 100% undetectable for your uses.

All MAF cars are harder to tune with no BOV, R34s aren't particularly worse than any other nissan motor, the reversion plays funny buggers with the MAF signal causing it to dump fuel, you need to stuff around with tps fuel trim maps etc.

yeah all it is going to do is cause the afm signal to be screwing when you back off the throttle making a pop or two, however with my suggestion it still lets air out the bov, just slower and doesn't open as easily so you avoid the pops and the annoying effects of running a bov.

even if it is plumbed in? pretty retarded.

It is still interesting to discuss it.

it is also running 3psi less and making basically the same power, be very interesting to see the ceramic bearing version overlayed on the gt3071 actually Id love to see all of your turbos overlayed with similar boost levels, makes it much much easier to compar If you guys are worried about your BOV do what I did and make a small gasket with a 1cm hole in the middle, it stops the BOV opening as soon and as much, result is it only opens when you completely close the throttle, won't open on half throttle, also when it does it doesnt make a ridiculous PSSSHHHHH noise, it is much quieter and will get a tiny bit of flutter on low throttle changes.

I guess my point was there are plenty of oils for similar prices that will cause your engines zero harm. Off the topic of Sougi has anyone tried using Mainlube products? A lot of racing teams swear by it and some very high end industrial players also use it in their industrial machinery (bhp and several mining companies) Doesn't sound cheap around $300 to change your engine, diff and gbox oil but if you get their filtergram tests done regularly they say it should last up to 20,000kms in a daily driver

Yeah my bad they don't, however a few high end audis do have them on their V8 engines

yeah a few high end euro cars have them, very interesting piece of hardware, got to play with a prototype one at my university once, lots and lots of maths to design them correctly!

A great example of flat torque is the BMW tt 3L six, it runs variable boost, variable timing and possibly even variable length intake runners, but for you the best way to achieve flatter torque (straight diagonal power) is a turbo with decent sized hot side and wastegate, cams and ported head. But end of the day this isn't the best way to spend your money, if you put it into other things you'll get better performance but you'll have to deal with the huge power jump when boost comes on and the power dying off hard after 7k rpm. If you really want a nice power curve just buy a big v8 or forced induction large capacity motor.

the angry mob isn't really that big

because if you look at the formula power is proportional to torque x rpm, so even if torque is falling rpm is climbing so power can still climb. but due to the design of engines torque will always drop off towards redline, way you can see this is lets say there is a maximum of x air available at 4000 rpm, at 8000 rpm the intake can not swallow any more air so that x air is divided by 2 as the intake cant breath anymore, hence the torque is effectively halved, however as you are firing each piston twice as often even though the power per explosion is halved your overall power is the same because you are running double the rpm. So basically to hold torque for longer you need to make the same air available at higher rpm as is at lower rpm, this means removing restrictions or using forced induction, now turbos obviously cant supply x psi forever so they will drop off as well, but they will allow peak torque to be held much later than with out it. So you want more torque for longer? bigger turbo, or remove restriction by getting bigger cams, intake, exhaust etc pretty simple really. This is why talking about torque is confusing, if people said more power you would just instantly think, cams turbo etc, but when people talk about torque they get all confused. edit: This isn't entirely correct but it is a great analogy, think of torque as the force per explosion, think of power as the force per explosion multiplied by how many explosions you get in 1 sec, more rpm = more explosions = more power

Yes I realise they are different things but Im fairly sure a knock sensor will pick up pre ignition as well as detonation, perhaps it does only pick up the later Im not sure. Either way I thought that detonation was pretty much an all or nothing thing, either most of the mixture detonates or it doesn't, is it possible for just a tiny bit to do so? I guess my real question is how does the scale translate to actual detonation, is there a certain amount of noise (eg 40) where there is zero detonation, and a certain amount where the entire mixture is detonating (255) obviously these would be inexact figures with large spread but I was wondering if there was any documentation by Nissan on what levels generally translate to.

he was probably trying to talk at the same level as this guy lol

it might be that much better but it isnt going to make that much difference

the turbo he is talking about is your run of the mill highflow, check out the dyno sheets from hypergear and gcg for some similar results. stock internals will not last making 500hp either, 400hp at the wheels would be the absolute max I would run through a standard motor, even then it wont last forever.

then why did you argue with us? all you did was misrepresent what I said to come to the same conclusion.

I mean at what level (number) does it translate to the motor actually knocking or having preignition, obviously it isn't knocking all the time so there must be some threshold +-25% or something where it is actual preignition.

It is called slipping the clutch, there are many ways to get it into the power band fast, either way my example was extreme to prove a point, that it is the power level and spread that defines how fast a car is not the amount of torque. Actually they make just as much power which is why they are just as fast, which was my entire point, they have to make far more torque to produce the same power due to the fact that they dont rev, large difference in torque levels but same power results in them being just as fast, ergo torque levels are not important in discussion, it is only the power level and spread.

Almost certainly would be able to pull a heavy car if it had enough power and was geared appropriately, don't need 20 gears unless you have a tiny 1000rpm power band like a diesel, F1 engine have a wide 4-5k power band with something like 6-800hp and would easily be able to a 2 tonne car if geared appropriately with a 6-8:1 diff I don't really know why you are making stupid comparisons, all I was demonstrating is that the torque figure is meaningless and power spread is all that matters, obviously the vehicle has to be geared appropriately for the power band. Hell look at those electric cars with 2 speed gearboxes, the engines rev to 50-100,000rpm so it is obviously possible to set up a gearbox for it. The example I gave was how an F1 car has almost a third of the torque of say an xr6t and is far far faster even if it weighed the same. You attempted to say that this was wrong, but failed to show how, resorting to fallacious comparisons and getting your knickers in a knot isn't helping to prove your (wrong) point.

same Yeah I should have said is directly proportional, not =

its just bloody oil lol go get some motul or something instead, seriously it wont be any different what so ever

Yep if you hold the same torque for longer and only change how quickly you reach it it would certainly be faster. Is this a joke? It would be an absolute weapon and would be extremely fast lol.... there is a reason they are faster than v8 super cars and a 1200nm XR6 turbo, sure weighing half the weight is part of it but even if it weighed 2 tonne it would still be faster as it had dickloads more power. More average power = faster, torque has nothing to do with it. Another example is if I made a whopping total of 5nM of torque but I could spin my motor to 50,000rpm then I would still make loads of power and be very fast, reason is power = torque*rpm, actual torque figures mean nothing on their own, power figures however take rpm into account so they are always far better to describe the performance of a motor.

wouldnt the fine be the same no matter what as you aren't running a stock turbo, external internal or external via the housing doesn't matter?