Yes I can Firstly yes I can, I am coming up on 19 years of professional engineering experience ... I did electrical / mechanical engineering at university. I have worked on embedded systems (e.g. the equivalent of ECUs), power station simulators, networks ... and many other different types of systems. My job is as a project manager, systems, and processes analyst. One thing I have learned from all this experience is that with an appropriate basis of facts and reasonable assumptions you can accurately extrapolate outputs and outcomes based on similar systems. Whether that be the number of expected defects in a software development, the fuel requirements of a systems based on loads, or the power output of an engine. Even before the car was dynoed I calculated 180kwrw based off the excellent presentation of my purchased VH45 engine and from my excellent V6; given that the differential and drive shaft are the same, the engine and gearbox {while the gear ratios are different} the designs are very similar (of the same age, the same design period, using the same design technology, the same manufacturer, and therefore will proportionally have almost the same percentage engine and gearbox losses and power outputs) and also Nissan use a Lego design principle for their cars. Also the same dyno, the same dyno operator, the same engine installer, the same engine-gearbox-driveshaft-differential arrangement. I calculated 180kwrw, 170kwrw worst case, 190kwrw best case ... the car dynoed at 180.6kw ... need I say more. Nissan would have used the same type of extrapolation calculations when they specified, designed, and developed each of their engine and gearbox if it is based on similar parameter (e.g. inline engine, automatic gearbox, 1990 design tools). Here is a challenge, get the kw statistics for a normally aspirated 2 liter silva and 2.5 liter skyline and 3.0 liter with same type of gearbox (i.e. automatic / manual) from the same time period and extrapolate what you would expect each to make based on the other... I would expect your result to be within 10% more like 5% (as long as you use the same gearbox type). Secondly, my V6 was completely rebuilt and balanced a couple of years ago by MRC. Mark was so confident with its construction that he "guaranteed" that it would run all day at high rpm. Even for the guy that brought my engine and Mark installed, Mark was prepared to guarantee him one year warranty. I would be willing to bet good money that the guy that bought my car would dyno at 130-135kwrw. Also my engine and car get the best of treatment and servicing. Thirdly, my original intention of stating that I calculated it made 270kwfw is so that those intending to do the conversion (be it a twin turbo) could determine what they could expect their cars to make.
thanks No I havn't but thanks for explaining. Who is this directed at?? Me? I'm not trying to detract or belittle this engine swap, in fact I am quite jelious, I was just interested to know how the engine makes so much torque. I'll go now.
enjoy it like everyone else said steven..... i just raised the question as hey this is a forum which ive learnt so much from.... however i understand that if the holden engines are pushrod and have older tech and that, that it wouldnt produce that much.....as i said earlier there is 1.5L difference, however im still a bit why the ls series nowadays still uses this tech when they are get out more ponies by incoporating new technology?
$$$ Cheaper to import a mass produced engine from the states than build a new motor. There thought pattern is make a bigger engine rather than a better one.
Pushrod engines are already mass produced and are cheaper to build(therefore avoiding extra production costs). It's that simple.:zlove:
Also potentially the "New Coke" affect Also potentially the "New Coke" affect. Holdens and Chevy have been using this type of engine for so long that there could potentially be a buyer revolt if they put a "little" (under 5 liter) engine in their hero cars. Look at Ford with their XR6 and XR8 ... the XR6turbo in real terms can easily have more power than their V8 but the XR6turbo is tuned by the factory to be under powered.
:bash: :bash: :bash: 19years dude and you made a killa mistake. there is no % loss, its fictitious. mechanical losses at a measured amount, not a scalar power %. summised any given engine dynoed at the fly will make xyz power. any given transmission will reuire abc torque to turn it. power is a derrivative of this torque. i could go on for ages, but im fighting the weather now trying to get my vh45de into the patrol before it goes pearshaped outside enjoy folks.
to a mod Can someone go through and delete all the posts regarding to powertrain losses... and then delete this post.. Then make another thread of 'Im guessing a powertrain loss for fun but really guessing and giving other people the shits for their guesses, so join in and give me the shits as i give you the shits' This is the first solid well done v8 z32 thread done since ive ever seen the forum and everyone is wanking on fwkw and powertrain losses. I want to hear details about the conversion.. all the wank to another thread cheers.
sort-of not really on here, kinda a bit sometimes maybe ....???? yeah something was wrong with my original account so i created this one, need to get this merged into my other one by a Mod one day.
