thehelix112

My 240z in Oz. Really need to loose that bumper when I get back.

I'm a senior software architect/developer with a computer security startup based out of Santa Monica, CA. Lots of interesting work, but little time and no space for working on the zed. Dave

I trawled through tirerack a while back and basically decided on the Dunlop Direzza Sport Z1 Star Spec http://www.tirerack.com/tires/tires.jsp?tireMake=Dunlop&tireModel=Direzza+Sport+Z1+Star+Spec The reviews are highly positive, sorry I don't have any first hand experience, not getting paid for 7 weeks will do that to ya. Dave

Myron, Could it be to do with keeping temperatures even between the banks? Is it in the way? Dave

Do you mean VR38DETT? As in the new R35 engine? Dave

Yeah, it probably wouldn't make any difference, I wasn't suggesting you refabricate anything, or shift the mounts or anything, just that you add a piece of tube from the rear side of the engine mount at its innermost point, down to the piece of tube you just added. This would seem to provide a vertical load straight from the mount to the x-member for very little effort. More than likely complete overkill and not worth the weight/effort, just occurred to me so I thought I'd mention it. Dave

Myron, Given how fast you work, you've probably already done this, but would it be worth it to tie the engine mounts straight down to as close to the 1" OD x-member on the tc mount as possible? That way the weight of the engine is not only trying to rotate the rails, which tries to rotate the tc mount which tries to rotate the rod, but its weight will be placing more of a sheer force on the x-member/tc box joint. This would seem to me to be stronger it will reduce the flexing of the rails/tc joint along the axis of the joint. Dunno, someone with more of a clue will hopefully chip in. Dave

Barely.

That website has been around for a very long time. I wouldn't be surprised if it was last updated when the USD was twice the AUD, I may be wrong, but I wouldn't expect them to honour that price if I were you. Dave

Looking damn good man. You work fast. Straight pipe too loud for you? Dave

I'm not sure how big the MAF is, but Myron is not welder-shy, I'm sure he could make it fit, and his first post on this talked about the air filter, and its a race car.. wiper mechanism comes in a small bottle labeled RainX. Dave

I vote for backward. But I'd open up the cowl to let the air flow into it more easily. That way you end up with a (relatively?) high pressure zone at the entrance to the intake tract, and a short intake tract meaning less weight? I wonder though, is the manifold geared towards accepting air from that location? Would moving the input mean the air has to stop and do a 180 at some point? Dave

There we go. But I still don't get how it changes the duration. It can't move back and forth every valve actuation.. Maybe the drive shaft (from page 10 in the above pdf) is connected to a VTC type system that changes the timing.. but that still doesn't get you the duration.. Anyone have any ideas? Dave

Like that, but for this system. This video has a real video that the last 2 seconds is close, but not good enough for me to get it. Dave

I'm sure someone will do some work for them. I think I understand how the lift is varied, but I definitely don't understand the duration. A simple video would go a long ways towards explaining this. Dave

http://www.nissan-global.com/EN/DOCUMENT/PDF/IREVENT/PRESEN/2007/070713VVEL-e.pdf Page 10 has a diagram showing how it works. I'm not sure if this means it will be necessary to extend the limits of how far the system can alter the timing in order to get any more power up high? *Goes back to trying to decipher diagram* Dave

Its late 2008, does anyone know if the Infinit FX50 is in showrooms yet? I wanna go have a look under one to see how the 4wd system works. If its the same as the RB26 then it should be possible to convert this engine to RWD. This engine looks to be a nice little unit stock, 290kw @ 6800, 500Nm. Does anyone have any experience with the VVEL system? How difficult is it to upgrade the cams and push the powerband a little higher in the rev-range? Comments? Dave

Wow. Maybe its the air up there but I've never heard a RB sound like that. Sounds vicious. Great work. Dave

Eric, Thanks for the input. Dave

I have a bone stock open R200. IMHO it looks we're using the last poofteenth of what is a 50mm+ travel in the half shaft. Why? To do it properly would involve getting shorter axles. That being said, I guess you get what you pay for. Dave

Guys, I'm thoroughly confused as to the `best' choice of these engines for my car. I've read that the JDM VH41 is the VH41 to have for several reasons including but not limited to, its port design [1, 2]. So not the USDM VH41 then. The US VH45DE, pre '96, apparently has crap siamese ports, though reputedly this isn't the case with newer engines? Can anyone confirm that with pictures? Which years have VVT? Pre '96 or post '96 or both or something else entirely? Wikipedia says that the engine stopped coming to the states in '96 [3]? I'm very confused. Does this mean the crapper USDM VH41s power all Q45s from '96 to 2002, when the VK45DE was introduced? The US VH45DE apparently has the alternator off to the side at the bottom making it slightly more difficult for translants. Does this impact how it fits in a zed? 450z, did this make you put the engine higher than you would have liked? The US VH45DE apparently uses single duplex chains, though no reliability issues have been reported. Does anyone know if its possible to upgrade a VH45 to duplex chains from a VH41? Of course its doubtful I'd do that straight away, just wondering if its possible. The US VH45DE uses plastic chain guides? Or was this something that was fixed late in the production? Is it possible to retrofit the metal VH41 guides? Once again, just wondering if its possible. Many thanks, Dave References 1. http://www.gpforums.co.nz/thread/301359/?s= -- 1st and 2nd post 2.http://forums.nicoclub.com/zerothread?id=138826&page=2 -- elwesso post half way down the page. 3. http://en.wikipedia.org/wiki/Nissan_VH_engine

Nigel, That is interesting, you don't perchance have specs for the adaptors do you? Also, you were dealing with the green Z31 half shafts? Dave

Hey, I did this on the weekend. I had to move the control arms out to get the half shafts into place, this is after flipping both races. The driver's side was much closer than the passengers side. I rolled the car backwards and forwards after they were installed, then put some people in the boot and did the same, no hopping or skipping or scraping sounds. I drove it around the block and I'll pull them back out this weekend to see that it hasn't punched the covers out. All in all, this is a very half-arsed solution in my humble opinion. I wish I'd known that I was going to need custom axles before the job would be done properly. I will hopefully keep a very careful watch on this as I'm not convinced at all its not going to break something. If I hadn't read this thread I would be sending them back and saying they're broken. (This was with std green axles I redid the boots/grease on myself). Oh, and there is less than half-a-bees-dick between the outer axle boot at the `big-side' and the sway bar mount. Anyone else has issues with this? Dave

I'm pretty sure its based on a VK56. Dave

Tim, I'd guess anything thats not inertia based. I've heard good things about Dyno Dynamics dynamometers. Or failing that, if we're mostly concerned with engine output, how about.. an engine dyno? (shock, horror). Its annoying reading ``my car makes 50hp at the wheels, soo.. multipled by X-figure-pulled-out-of-my-arse means my A12 is making a bajillion hp''. Dave