Stagea Dyno Results

[scotty nm35]

Yup.

[Commsman]

Works good too, brings it all on heaps earlier, just like the grub screw in the BOV.

I just got back from tuning after fitting the stock turbo, it was only a temporary tune as Garrett is out of GTX turbo's at the moment. Running ethanol and pushing 1.2 bar the stocker made 225awkw and 850nm. I might just stick with this one for a while...

This is a good representation of what a stock turbo (17psi) and a stage 2 (20psi) can do on ethanol, overlaid on the same graph. Cihan was very impressed with the stockers capabilities.

That's very impressive. How long would you expect the stock turbo to last at those pressures? So much has been written about short life expectancy if over 14psi. Is this temporary return to stock a bit of an experiment where you don't care if it lets go Scotty?

[scotty nm35]

I would prefer if it didn't, and I only raised it 2 or 3 psi, should be ok.

I have an opinion on the failures, it seems to be the rear bearing that goes, possibly caused by oil starvation. The oil restrictor banjo bolt only has a 1mm hole and could easily block, especially if the engine internals are dirty. As mine has been flushed, I am hoping it will last just fine. It doesnt sound noisy like they usually do.

It could be a good idea to flush your engines and then check the hole isn't blocked...

[andy65b]

looks good Scott.... when you get the new turbo on this will be a big number..

[ironpaw]

Guess he didn't have my dyno sheet?

[scotty nm35]

Guess he didn't have my dyno sheet?

Sorry mate, I did ask but he forgot. I may be going back this week...

[ironpaw]

No prob...I might come too if we can fit this actuator

[scotty nm35]

I'm not tuning, I'm fabricating a stand for the extraction fan I gave him, the 1m blades should do the job nicely. I wont say what it will suck like...

Do you want me to make another modified actuator?

[Commsman]

I would prefer if it didn't, and I only raised it 2 or 3 psi, should be ok.

I have an opinion on the failures, it seems to be the rear bearing that goes, possibly caused by oil starvation. The oil restrictor banjo bolt only has a 1mm hole and could easily block, especially if the engine internals are dirty. As mine has been flushed, I am hoping it will last just fine. It doesnt sound noisy like they usually do.

It could be a good idea to flush your engines and then check the hole isn't blocked...

I'd love to know where exactly this is so i could check. Is it on the block or turbo? Is it recommended to drill the hole out to (say) 1.5mm or does that cause other problems?

I'm very keen to make the std turbo last as long as possible and, given your results, it doesn't look like I need to put up with low power. Not saying I will run boost that high though.

[ironpaw]

I think Scott's been drilling the hole to 3mm

[scotty nm35]

It only made 2kw more with the higher boost, but 100nm extra torque.

The restrictor banjo is in the block, you can just get to it with a (17mm?) spanner. Don't strip the thread putting it back in... I dont know if drilling it out will be too much for the seals, probably not, perhaps you should just check it to make sure it is clear.

[Commsman]

I think Scott's been drilling the hole to 3mm

Mmmm, 300% increase. Sounds like Scott

Thanks Scott. You posted at same time. I will check that it is clear in the first instance. Maybe discuss improvements later...

Edited March 20, 2011 by Commsman

[ironpaw]

He'll have to answer that one LOL. Banjo bolt...somewhere on the turbo..?.

or not...

Edited March 20, 2011 by ironpaw

[Commsman]

He'll have to answer that one LOL. Banjo bolt...somewhere on the turbo..?.

or not...

For some reason the song "The devil went down to Georgia" springs to mind. But I digress.

[scotty nm35]

Discussion moved here...

http://www.skylinesaustralia.com/forums/topic/358131-m35-banjo-restrictor/

[sky30]

Works good too, brings it all on heaps earlier, just like the grub screw in the BOV.

I just got back from tuning after fitting the stock turbo, it was only a temporary tune as Garrett is out of GTX turbo's at the moment. Running ethanol and pushing 1.2 bar the stocker made 225awkw and 850nm. I might just stick with this one for a while...

This is a good representation of what a stock turbo (17psi) and a stage 2 (20psi) can do on ethanol, overlaid on the same graph. Cihan was very impressed with the stockers capabilities.

scotty,

Nice result with stock turbo, didnt think they would like running at 17-20psi, are they ceramic wheel?

Also your dyno graph doesnt have the power dipo at 3500rpm??? Do you run stock converter/trans?

[scotty nm35]

Yep, ceramic but much different design to the Skyline/C34 wheel, ours run at 1 bar stock where theirs blow at over 12psi apparently. That is where the worry comes from I think as not too many of us have been comfortable with ramping the boost on the stocker.

Nope, My transmission has had a full build, still a work in progress. The 4000 stall dominator made me is a little too open, the factory lockup clutch you see in the dyno graph wont work and just slips as it is trying to haul in 1.5 - 2k revs (which it just cant do). I have disconnected the clutch for street and installed a 12v switch direct to the solenoid for dyno runs. It holds well over 1100nm of torque that way, I had it slipping at 24psi on my old turbo so im not sure where it will crap out with the Garrett GTX.

I am trying to source a spare torque converter to cut open, they are hoping to find as direct a replacement as they can to allow a larger clutch and more efficient stall stator to be fitted. Perhaps the Patrol TC may fit? Let me know if theres a spare M35 one around as this will be an issue for anyone building their box eventually.

[wolverine]

I just got back from tuning after fitting the stock turbo, it was only a temporary tune as Garrett is out of GTX turbo's at the moment. Running ethanol and pushing 1.2 bar the stocker made 225awkw and 850nm. I might just stick with this one for a while...

This is a good representation of what a stock turbo (17psi) and a stage 2 (20psi) can do on ethanol, overlaid on the same graph. Cihan was very impressed with the stockers capabilities.

So much more power where you can use it on a day to day basis.

[scotty nm35]

Not really, not with the high stall. The turbo is well out of efficiency before the TC enters its. If I was to put the stock stally or a manual in it would be a bullet.

[wolverine]

It crosses at 5100rpm. The average (usable) power is so much better.

No question what would be a better drive with a manual.