Blown' In The Wind

[R33]

My friend's r34 gtr had one of its stock turbo blown earlier this week. The car has a 70 shot NoS and is mildly tuned using F Con S. Without the laughing gas, it was posting 340hp on all 4 at 1 bar with loads of torque which peaks at about 3500rpm.
He was playing around with another car early one morning on the highway when he suddenly lost power. Had it checked yesterday. The back turbo, which serves the 4th/5th and 6th cyl. was blown to smithereens!
One early theory is that the dry NoS system, which he is using, does not evenly spread the gas to all cyl. It had apparently gone too much to the 4th/5th/6th cyl. causing the back turbo to overboost when NoS was being used. So it went KABOOM!
If that was true, then I suppose dry NoS system is no good. Meanwhile, my friend is now installing a second hand stock turbo as replacement for the time being. GT-SS remains hot favourite in the near future
Let's say he wants to run the GT-SS at 1.2 bar. Must he change cams/fuel pump and injectors or could he just run stock innards? I think he can safely use stock innards at 1.2 bar of the GT-SS. But his mechanic disagrees. Any input wud be appreciated.

[SkylineUSA]

The problem is the design of the intake of the RB26, you will get more N2O in the 6th cylinder, because it funnles in because of for mentioned design problem.

Always have your injectors flow checked, and use the highest flow rate on number 6.

A dry shot on a RB26 is asking for problems. The guy is lucky it did not burn a piston.

[SkylineUSA]

Sean put out over 600hp out of a stock engine with 2530s, I do not see the GT-SS putting out more than that, but its only a matter of time before something lets go if he does run stock.

The Mech, has a point, but it comes down to how long your friend wants to dance with the DEVIL

[SkylineUSA]

To clear something up, detonation is what did it.

[raysoh8]

but if the rb has a problem of putting more n2o into the 6th cylinder, arnt you supposed to put less gas into the 6th cylinder?

[R33]

Thanks Sky. He's not planning to hv more than 400whp. I think that's achievable with a pair of GT-SS and stock innards. But I suppose, better be safe than regret it later. Especially with the way he's driving the car!
I don't understand the part you were saying detonation was the cause. (I am next to Mr Empty when it comes to all thses things!). Do you mean to say that detonation can hurt/damage a turbo?

Raysoh: I don't think you could map the fuel to put less gas in any particular cyl.

[SkylineUSA]

400whp should be very easy to achieve with the GT-SS. Not to mention, a better power band.

Detonation, and stock turbos do not mix. Think of it like little hammer constantly pounding the exhaust wheel, it will break. Yes, detonation can hurt the stock turbos. Steel ones can take a little more abuse.

The only way to cool the cylinder is with more gas, if you run lean under boost, your going to blow a hole in that piston. Majority of the time, the #6 will be your down fall. I have seen #5, and #4 as well, but most #6.

That is why the best flowing injector goes to #6.

[SkylineUSA]

I forgot to add, 400-425 should be fine with stock internals. Is he still going to use the N2O? How many times has he shot is, before the engine failure?

70, is actually a fairly big shot. Think of more like a 140 shot, while under boost. If he would have dropped to like a 40 shot, his turbo might still intact, but who knows.

[ZZII]

That's why i love the Nur Turbos! Their Steel, instead of ceramic!

[Gonthrax]

Originally Posted by R33

GT-SS remains hot favourite in the near future
Let's say he wants to run the GT-SS at 1.2 bar. Must he change cams/fuel pump and injectors or could he just run stock innards? I think he can safely use stock innards at 1.2 bar of the GT-SS. But his mechanic disagrees. Any input wud be appreciated.

:Takes R33 over to the side and shares 4cyl tricks with him:


Aquamist water injection. That with good fuel and ignition tuning. Silly mechanic :P

With what you were mentioning that he was planning on doing, he'd have no problems at all with the innards

[R33]

Sky/Gonth: thanks very much for the inputs. My friend wants to still use the NoS of and on. I agree with you Gonth. 1.2 bar seems ok with stock internals.

About the aquamist Gonth...I am interested for my car. Is it perfectly safe? Wouldn't the water rust the innards? Are we looking at more power or better response along the power range?

[SkylineUSA]

Aquamist, will keep your eingine nice and shiny, not rust.

Its sort of bandaid, to detonation away.

If you tune the car with it, its fine, but if you run out of water and try to boost. Bad things will happen.

Yes, its safe. Just make sure the tank is full, when you play.

The main purpose, is so you can advance your timing in the power stroke to the point where it will not detonate. Other than that, its really useless.

Just adding it, will not make more power.

[Gonthrax]

Exactly Sky, running it doesn't add power by itself. But it does lower intake charge temps and ambient temps alot so you can run more boost

If you've got electronic boost control it's wonderful. Just make another boost setting w/ higher boost when injection's on.

I'm digging up a link for you.

Here you go

Very affordable for the benifits IMHO.

*Edit*
Just get a little float from a gas tank and hook it up in your tank, run a gauge off that :P If you have room for another that is.

[R34 GTR]

R33

I don't think your friend will have any problems using the GT-SS at 1.2bar + NOS.

My engine in my R34 gave up about 2 months ago. I had be using the GT2530s for over 2 years before. Also from the HKS Goods Master:

GT-SS 280ps
GT-2530 320ps

For my car:

1st year - 550hp 1.4bar
2nd year - 600+hp 1.4 bar + headwork

All engine internals were stock except head gasket and different cams.
The reason my engine failed was because I never let it cool down long enough everytime I gave it a blast. So over the 2 years, it amounted to part of piston no.4 breaking off and sticking to the bore! So looks like a turbo timer is on order....!

[R34 GTR]

Originally Posted by R33

About the aquamist Gonth...I am interested for my car. Is it perfectly safe? Wouldn't the water rust the innards? Are we looking at more power or better response along the power range?

I have used Aquamist in my Supra and Skyline. I won't say it gives more power, but rather as a safeguard if you plan to run higher boost or if the intake temps get high in the summer. In your case its all year round!!

I use 50% water and 50% methanol mixture in the tank. The spray nozzle is the small one I use. Tip - fit the nozzle on the hard pipe (the one joining the plenum) not on the plenum as the mixture won't be mixed well enough and the rear cylinders won't get much!
The pump is set to come on at 1.0bar+

Also if you are worried about the tank being empty, you can easily fit a water sensor in it with a LED in your dash.