Jump to content
SAU Community

Recommended Posts

I'm very impressed with Haltec's efforts - take a look at that curve!!! awesome :P well done on the imporvements guys and preps to the stock engine and hardware getting there (if even for a short time!)

good to see an Aussie company doing the hard yards.

an R35 will be mine in about 10 years ha ha ha ;)

  • Replies 99
  • Created
  • Last Reply

Top Posters In This Topic

I think the same about being able to feel the difference in weight with a set of titanium rods. But I cant feel any difference - Will let you know but as im not sure I dont want to get quoted saying anything!

Update:

Nissan USA have helped us out with a block which is being shipped to DARTON Sleves and will be ready to send to Oz in 10 days!

So, you killed it with a mechanical over-rev?

Normally a rod will fail due to a extreme tension strain when this sort of thing happens, but i'm guessing since they are made from titanium, the gudgeon hole in the piston was the weakest link.

Yes, it would be nice to know what actually caused the failure. Because the inference is that weak pistons caused it when from the little we have been told it could have resulted from an over rev, for example.

Still most here seem to be happy to assume the worst as far as Nissan are concerned :P

It appears Haltech have found the limits of Nissans new super car!

Oh please.

We all whinge about it, but that right there is the number 1 reason Nissan make it as difficult as possible to modify the GTR.

One engine fails prematurely due to completely unknown circumstances while being circuit raced, and all of a sudden the VR38 has a "limit".

The internet warriors get a hold of this story, chinese whispers begin, and the VR38 is a soon known as a 'weak' engine.

Once the exact cause of the failure has been determined, and other motors start experiencing failures are similar power levels, then maybe you can claim to have been the first to find the limit.

Until then, it's a single motor which has failed, while other 500+hp GT-R's soldier on.

Piston #1 and #3 had separated from their lower halves right through the center of the gudgeon pin. As the Conrod's had no piston's to guide them up and down the bore they started smashing the bore, block, oil pump, sump and anything else that got in their way.

Obviously I haven't seen the engine, but let me get this straight...

You're suggesting that two pistons, failed simultaneously, in the exact same point, at the same time, due ONLY to a structual flaw in the piston design?

Isn't it far more likely the piston separation is a by-product of a more serious underlying issue?

Was fuel pressure, oil pressure, or oil temperature logged at any stage in this "testing"?

does the ECU control the gearbox ??? or does a nissan computer still control that ?

i read in the first post you were doing flat shift calibrations ? what controls downshift ?

just sick of the keyboard hero's carrying on about the box's blowing up next the motors

Sounds like the new GTR is continuing the tradition of engine and gearbox failures when modified.

let the chinese whispers begin :down:

To the guys arking up about it - how does it affect your life so much - were u the Chief Nissan engineer who designed it? Get a life - its good to know the positives and negatives about certain things at the end of the day im sure most people will be able to work it out.

Edited by Starionturbo

Some how i think its no where near at its limits and the proof is that there are thousands of 35 GTR's with more power and work done to them than the Haltech 35, and still going strong, I think that the Tuner was at his limits Maybe ?

Wont it be a bit embarrassing when heaps of other shops and tuning companies make way more power and the engine still holds together after making a coment like

It appears Haltech have found the limits of Nissans new super car!

The engine had met its maker.

Wont it be a bit embarrassing when heaps of other shops and tuning companies make way more power and the engine still holds together not to mention the loss of customer client el ?

Some how i think its no where near at its limits and the proof is that there are thousands of 35 GTR's with more power and work done to them than the Haltech 35, and still going strong, I think that the Tuner was at his limits Maybe ?

Wont it be a bit embarrassing when heaps of other shops and tuning companies make way more power and the engine still holds together after making a coment like

Wont it be a bit embarrassing when heaps of other shops and tuning companies make way more power and the engine still holds together not to mention the loss of customer client el ?

I doubt there's "thousands" with more modified engines than this one going around, they haven't made all that many!

I doubt there's "thousands" with more modified engines than this one going around, they haven't made all that many!

maybe but you get my drift, i dont think that the limits of the VR have been reached yet not buy a long shot somehow

No one is talking negatively, the engine blew, big deal its an engine its supposed to do that, its just comments like The limit has been found are wrong and shouldn't be made until quite a few engines are tested IMO.

A few hours later the engine was fully stripped and the damage to the engine was clear - It appears Haltech have found the limits of Nissans new super car!

The engine had met its maker.

Piston #1 and #3 had separated from their lower halves right through the center of the gudgeon pin. As the Conrod's had no piston's to guide them up and down the bore they started smashing the bore, block, oil pump, sump and anything else that got in their way.

What was the condition of the bore liner? I know Nissan made a point of highlighting it's new

fangled Thermal Sprayed bore liners when the car was released. Many people were worried

about the ultimate strength of the liner and there were even suggestions that the liner

wears out fast enough to require a tear down service at 100k, which i still find hard

to believe.

Is is possible that the Pistons may have separated due to bore liner collapse and

subsequent gouging?

From what I understand, the VR38 shares the same bore centres as the VQ35HR but finds it's

additional capacity from the lack of sleeves. Wouldn't this mean that the Dartons would lessen

the bore diameter, if only slightly? So you would probably end up with a 3.6 liter engine, albeit

a much stronger 3.6 liter. That's assuming there is not much room to move in terms of boring

outwards.

Edited by gp900
Who cares if the engine let go, i'm more excited to see how much more hp that can make with a forged engine.... not many of those going around! :)

:P So exactly how does a 'forged engine' make more power? Whatever a 'forged engine' is.

:P So exactly how does a 'forged engine' make more power? Whatever a 'forged engine' is.

*Detects sarcasm*

Forged internals = stronger.

Stronger resistance to cylinder pressure = more power potential through boost and revs

duh. Do you think 1000hp engines are cast or something? lol

If you werent being sarcastic, sorry

Edited by Jet30
Forged internals = stronger.

Stronger resistance to cylinder pressure = more power potential through boost and revs

duh. Do you think 1000hp engines are cast or something? lol

You missed the point there champ.

A "forged motor" (ie. something with forged rods/pistons) doesn't inherrently make more power.

You don't get 1000hp from pistons and rods. You can make decent power by upgrading the support systems and pushing them to the limits on a motor that can handle it.

Somehow I think you're going to have to upgrade the turbos before you really find the limit of a stock VR38. Thus until Haltech do that, building a stronger motor is near-on pointless.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • I mean, I got two VASS engineers to refuse to cert my own coilovers stating those very laws. Appendix B makes it pretty clear what it considers 'Variable Suspension' to be. In my lived experience they can't certify something that isn't actually in the list as something that requires certification. In the VASS engineering checklist they have to complete (LS3/NCOP11) and sign on there is nothing there. All the references inside NCOP11 state that if it's variable by the driver that height needs to maintain 100mm while the car is in motion. It states the car is lowered lowering blocks and other types of things are acceptable. Dialling out a shock is about as 'user adjustable' as changing any other suspension component lol. I wanted to have it signed off to dissuade HWP and RWC testers to state the suspension is legal to avoid having this discussion with them. The real problem is that Police and RWC/Pink/Blue slip people will say it needs engineering, and the engineers will state it doesn't need engineering. It is hugely irritating when aforementioned people get all "i know the rules mate feck off" when they don't, and the actual engineers are pleasant as all hell and do know the rules. Cars failing RWC for things that aren't listed in the RWC requirements is another thing here entirely!
    • I don't. I mean, mine's not a GTR, but it is a 32 with a lot of GTR stuff on it. But regardless, I typically buy from local suppliers. Getting stuff from Japan is seldom worth the pain. Buying from RHDJapan usually ends up in the final total of your basket being about double what you thought it would be, after all the bullshit fees and such are added on.
    • The hydrocarbon component of E10 can be shittier, and is in fact, shittier, than that used in normal 91RON fuel. That's because the octane boost provided by the ethanol allows them to use stuff that doesn't make the grade without the help. The 1c/L saving typically available on E10 is going to be massively overridden by the increased consumption caused by the ethanol and the crappier HC (ie the HCs will be less dense, meaning that there will definitely be less energy per unit volume than for more dense HCs). That is one of the reasons why P98 will return better fuel consumption than 91 does, even with the ignition timing completely fixed. There is more energy per unit volume because the HCs used in 98 are higher density than in the lawnmower fuel.
    • No, I'd suggest that that is the checklist for pneumatic/hydraulic adjustable systems. I would say, based on my years of reading and complying with Australian Standards and similar regulations, that the narrow interpretation of Clause 3.2 b would be the preferred/expected/intended one, by the author, and those using the standard. Wishful thinking need not apply.
    • Yes they do. For some maybe. But for those used the most by abusers, ie Skylines, the numbers are known. The stock eyebrow height for R32/3 Skylines is about 365/375mm or thereabouts. The minimum such heights are recorded in adjacent columns in the database.
×
×
  • Create New...