Boosted Esky

That's gotta suck, 2x dead GTX's It will definitely be an oil issue. The remnants of your first failed turbo bearings will be in the oil pan. So drain the oil and bin the filter. New engine oil filter, fresh synthetic oil like Redline. If this hasn't been done already you really need to install 4AN braided teflon oil feed with inline 40micron filter. Don't fit the restrictor. Get an inline 4AN 1/8NPT fitting like below and screw a pressure gauge into it to verify oil pressure in the oil feed line. This should show up any issues. You want around 40psi in the line when the oil is hot. If it doesn't get over 60psi leave the restrictor out. If it's higher than 60 hot, fit a 1mm restictor but do this at the 40micron filter (after the gauze) so you can verify oil pressure after the restrictor. Also make sure the turbo oil drain is big enough, 10AN is a good size. And yes, always prime a new turbo with clean oil (use a syringe) prior to start up.

Yes turbos have come a long way since the old tech T3's and T4's. I was in disbelief at the dyno seeing the result. Super happy with it. Thanks very much.. here's a more recent pic The turbo manifold & dump pipe were made by Dan @ Go Pipes and the aluminium intercooler pipes, turbo inlet & BOV return pipes by Silke Fabrications.

Yep normal road tyres will light up at highway speed if I step on it. My A048 semi slicks have really good grip with minimal wheel spin.

Yep it's at its peak for sure ?. The tuner was happy to leave it at 355. It's a great turbo gives a near vertical power curve between 4000 and 4750rpm

..

With a second Bosch 044 installed the GTX2860R genII made 355whp at 26psi. Car ran 11.7@ 121MPH a month ago

That's what I've already got on a Ford SOHC engine. It's a GTX2860R GenII in a T28 0.86 with the flapper welded shut, 38mm external gate. It's choking at 300+whp so looking for a bigger turbine.

Just wondering which version of the GT3071R turbine would perform best on a 4cyl 2L engine. The full size 60mm, 84 trim. Or the cropped 56.5mm 90trim aka GT2835 aka GT3071R-WG. *PLEASE NOTE * the CHRA will be fitted to a HKS style Mamba turbine housing, not the godawful T28 style housing. Thanks

Mamba make a T25 turbine housing for a full size (60mm) GT30 turbine. I am considering using one to save the expense of getting a new custom T3 steam pipe manifold, EWG, dump pipe made. Can anyone comment on the performance of these? I understand they're a compromise but it looks like the internals of the housing becomes quite large after the flange, you can tell how it's relieved around the stud holes. I'm tight on space so a T2/T3 adapter won't work. Also thinking of using the compact T04B compressor cover (GT2871R cover). Thanks

Only a short run to the intercooler. Intercooler inlet is 2.5"

Wow a lot of replies thanks. There's no AFM and plumb back is angled on the intake so that's all good. I actually just had the car at the drags Wed night and have gain 3 tenths of a second with this new set up so I'm pretty happy with where it's at. BOV is set hard so it doesn't dump all the charge and the 2.5" pipe doesn't seem to affect things too badly now that I've had a good chance to test it. I'm sure though that a 2" pipe would improve the symptom. Cheers

I've recently swapped out a GT2860RS for a GTX2860R Gen2 and had the engine retuned. There's a tiny bit of lag when changing quickly from 3rd to 4th, 4th to 5th. This never happened with the GT. Could it be that the billet wheel has less inertia and therefore slows down more between gears? The other changes made aside from the turbo is a larger 32mm plumb back BOV relocated to the throttle body side of intercooler (old BOV was 25mm and on the turbo side) and the pipe between turbo and intercooler stepped up from 2" to 2.5" . I've noticed if the BOV is set too soft the lag was worse. I have set it fairly hard but the lag persists. Just wanting some advice so I'm not wasting time changing things that don't need to be changed eg: changing the 2.5" IC pipe to 2". I get the feeling this is just a characteristic of the GTX turbo?? Thanks in advance

Are the factory supplied check valves ok to use in a twin pump set up or is it better to use an aftermarket one like Speedflow etc? The twin pump fitting kit I bought is designed to be used with the factory valves but I havebeen told they're rubbish and can cause the pumps to be excessively noisy. Thanks

Thanks

Hi I'm having trouble finding out how much heat these clamps can handle. The only part that could deteriorate is the orings and they are advertised as "high temp" but no exact figures. I'm wanting to use one on the compressor housing outlet which is quite close to the exhaust manifold, about 30mm away. Thanks

The car is a custom build. No AFM. I currently have a Turbosmart Kompact dual port in 25mm but it's on the turbo side of the intercooler and I get a little bit of mid rpm surge. I'm about to upgrade the turbo and go from 300hp 20psi to 350hp 25psi so I'm thinking 32mm Dual Port before the throttle body with a plumb back pipe, running in 50/50 config. I noticed my current valve performed a lot better in 50/50 config (less surge) compared to full plumb back. Another reason I'm leaning towards the dual port is to keep the police happy if I have to pop the bonnet. If I keep the BOV blanking cap in my toolbox it can easily be fitted if it got picked on. The cars build date is 1980, I have read somewhere that atmo vented BOVs are ok for older vehicles but I'm not certain what year that goes back to. Thanks

Hi. Which is the better valve? What are the main differences between them and reasons for preferring one over the other. Thanks

Correction- a standard YB head is good for up to 380whp before porting & cams is needed.

Hi Dale. A YB cosworth head would be ultimate but would've added about 7 to 8K to my build cost. In standard form the YB head doesn't flow that great so porting, bigger valves, better cams etc. The factory brake booster would have to be deleted and bias pedal box installed with remote reserviors etc. The aluminum YB heads are also known for going soft and cost about 3k to harden if a suss one was purchased. The going rate for a standard used YB head in GC is about 3k. I was also keen for a challenge to do something different and it's been a whole lot of fun since having it on the road. PB at the drags is 12.7 114mph so hopefully can get a high 11 with another 40hp. Thanks

Thanks very much Leroy. The engine is fairly well built. ARP bolts throughout, Cosworth YB steel rods and YB pistons. Cometic MLS head gasket. Sounds like I should wind it up

Hi , first time post here. I have a 2.0L 8 valve SOHC motor (pinto) on E85 with 630cc injectors GT2860RS 0.86 turbo External WG (flapper welded shut) Haltech ps1000 making 301whp at 5800rpm 20psi. Power bug has bitten and I'm chasing another 40whp to hopefully crack into 11sec 1/4 mile. Because my hotside is custom it will be costly to change to T3 manifold and Vband dump etc so I've looked at the GTX gen2. It's rated at 475 crank hp, 115hp higher than the GT version. The only difference between the two is the billet compressor wheel and cover and the shaft speeds on compressor map are 35,000rpm higher. Is it foolish to think this could make 340whp? I'm trying to decide on this or GT30 , if the GTX2860R GEN2 can do it I'll stick with it. If anyone can vouch for this turbo making those numbers please chime in . Thanks