S13 Stock Rb26dett

[Ganador]

Got a mates s13 which has a stock rb26dett and ECU. It idles fine and free revs fine. When driving flat foot it seems fine but is slow. When driving at constant speed and boost is around 0-5psi it starts to surge bad. Like when you back off the throttle with no BOV how the air rushes back into the turbos but it happens continuously while on the throttle. Cam timing is correct but for 20 degrees ignition timing the CAS seems to advanced. It back fires a poop load.

Any thoughts. Its a real pain in the arse to drive.

Dave.

[JonnoHR31]

standard 26 intake piping or custom?

[R31Nismoid]

And are you running the factory BOV setup for a GTR? (if not, what setup?)

[Ganador]

Its all good but isnt good. turbos where on their way out. There is now no rear wheels on either turbo, haha. Wierd though cause it didnt see over 10psi.

To asnwer questions though. Custom piping and single blitz atmo BOV

[R31Nismoid]

Well they are both causes of 'shuffle'

Oh, and if the turbos have let go - say a prayer that they didnt take 4/5/6 cyclinders with them

[Ganador]

Well i pulled both turbos off today. Front is fine but the rear has lost its wheel completely. Did a compression test before i drove it home with a blown turbo and all come up at 160 -170 but #6 was 112 Will do another one later in the week.

Car ran like absolute shit, haha. My guess is O2 sensor sensors are buggery too. Had been running rich for a while before the turbo went. Mate has no cat in it either

So im thinking my mate should. Get a set of decent 2nd hand n1 turbos, new o2 sensors, new plugs and a cat.

You think it should be fine with having only #6 cylinder that low on compression??

Does the ECU need the sensor that taps in the exhaust around the middle of the car?

Edited June 27, 2010 by Ganador

[JonnoHR31]

no, thats a temp sensor that brings up a light on the dash if the cat gets too hot afaik

[Moodles2]

There's only supposed to be no more than 10% variance between cylinders, 160 and 112 is at least 50% difference. Rebuild time.

[GUN_METAL_GTR32]

lol

byebye engine.

[s14_boosted]

by anychance where the turbo's that "were missing the rear wheel" ebay turbos? the compression does not seem too healthy neither... idd say fu*k it nd just do a full rebuild and aim for 500rwkw's

[R31Nismoid]

He said they were factory...

[TiTAN]

Well i pulled both turbos off today. Front is fine but the rear has lost its wheel completely. Did a compression test before i drove it home with a blown turbo and all come up at 160 -170 but #6 was 112 Will do another one later in the week.

Car ran like absolute shit, haha. My guess is O2 sensor sensors are buggery too. Had been running rich for a while before the turbo went. Mate has no cat in it either

So im thinking my mate should. Get a set of decent 2nd hand n1 turbos, new o2 sensors, new plugs and a cat.

You think it should be fine with having only #6 cylinder that low on compression??

Does the ECU need the sensor that taps in the exhaust around the middle of the car?

by the time you find and buy the used n1 turbos you might as well have just saved time and ordered some new garret bolt in replacements.

[Ganador]

So 10% difference between them hey. Might try and make the rest 112, haha jokes.

My mates a bit tight he'll probably sell the thing before a rebuild is considered. Was thinking might get away with a hone and new rings.?...

[Ganador]

Did another comp test just then.

1 165

2 162

3 162

4 162

5 160

6 98

[Proximity Motorsport]

Ouch that's not good. Probably just needs hone and rings but if you go through that much effort, for $2500 can buy forged rods pistons head gasket and bearings from spool.. Good for a long time then.