Markus951

Thanks, but still, can anyone suggest me new camshaft wiht longer duration. I might even consider buying second hand.. also, adjustable cam gear should be an option here...

NZ951

CS-16 has a 1000 rpm idle or less, peak torque at 4400-4800, peak bhp at 6400-6800 depending upon exhaust type and size, intake port diameter & length;

M8-16 will idle at 950 smoothly, peak torque at 4200-4800, peak bhp at 6400-6800 depending
upon exhaust type and size, intake port diameter & length;

M8/S3-14 will idle smoothly at 925-950 rpm, peak torque at 4400-4800, peak bhp at 6400-6800 depending upon exhaust type and size, intake port diameter & length;

B13/M8-14 will idle smoothly at 1000, peak torque at 4800-5200, peak bhp at 6600-7000 depending upon exhaust type and size, intake port diameter & length.


Contact Jon at www.jmengines.com

I am going with the CS-16, it does not need race springs or retainers, but I think I will do them anyways... and rev too 6600-6700ish

black944 turbo

Lindsey racing has an adjustable cam gear. Just an FYI

Olli Snellman

Adjustable 951 cam gear can be found also in Finland (a Finnish manufacturer) which is much closer to Markus.Also inside EU trade, so no taxes or Customs fees

Markus951

Well

Few problems occured...

After going full load and then deaccelerating it puffs out blue smoke. Did compression test my cilinders are 145, 145, 143, 145 psi. First I changed the oil bacause i had so much gasoline in it (due to big injectors and non tuned engine management) It does not at idel, it does smoke a little bit on accelerating. But after deacceleration, when engine creates vacum it seems that it sucks oin some oil and after that it puffs it out. My engine breaths fine so it cant be oil rings? or can ? My garrett ballbearing runs with ATP turbo oil resistor, so the stock oil pressure should not be the problem for Garrett.. My compressor housing is not oili or anything, MY IC pipes have some oil in it but thats normal, nothing unusual there. Also, I tested launch control system with rev limiter set to 4000 rpm, it will puff out blue and black smoke. during that boost is somewhere 5 psi.

Is my turbo busted (some shaft play, but according to ATP 1mm radial and axle play is normal) Im out of ideas..


Markus

fast951

Pull the O2 sensor, if it has oil residues, the oil is coming from the engine (assuming O2 sensor is in stock location, in front of turbo). Check the spark plugs..
Bad valve guides/seals cause oil to enter the combustion chamber under heavy vacuum. This may not be the cause, as you have the blue smoke during launch control at 5psi boost.

* If the crankcase pressure is high, the turbo will not drain properly and will flood & smoke.
* If you are using a catch can venting to atmosphere, make sure to reroute it to dump in front of turbo (J-pipe). The crankcase needs vacuum suction as created by the turbo.
* If the oil smells like gas, DO NOT run the engine for long, it can cause problems.

Markus951

Hmm ok

OK I will try to reroute it to J pipe, will see what happends. So Vacum suction should decrease the crankcase pressure and everything should get back to normal. Before I put my engine back together it was OK. did not smoke or anything. Could it be that during the tuning and some mild detonation I have destroyd piston rings? Compression test showd me different my Psi-s are allmost equal. (145 psi in most cilinders).

Markus951

I promised pictures of new healamp duckt



car was involved in little accident in traffic jam about 5 kmh, but nothing serious.


I rerouted crank ventilation back to in front of turbo but on heavi vacum it still smokes, so next step is to replace valve seals. If the smoke does not go away then two more things to replace. oil rings, or 1500 km old Garrett turbocharger. Any advice what the hell could be wrong here?

special tool

Markus - DO NOT UNDERESTIMATE THE IMPORTANCE OF CRANK VACUUM ON A 951!!!!!

What is between your air/oil seperator and your intake connection? A catch-can of some sort? Please describe it.

Markus951

At the moment crank wentilation is connected to in front of the turbo but I don't know how good is the vacuum there at the moment because Im running without MAF so... but hose I don't have anything between turbo and air oil separator no oil catch can or anything... ditectrly to turbo. hose is about 1.5 meter long.. I did it quickly and rerout it over the engine, did not want to remove intake manny..

fast951

When the turbo spins, it creates suction in front of it, which helps crankcase venting. The way you have it connected is fine.

Mike Murcia

I've always wondered how much the vac decreases when you convert to a MAF from the barn door AFM. Think path of least resistance... How much of that suction is getting from the j-pipe down the metal venturi tube and through the pinhole sized opening on the AOS? Seems like most of the suction would be alleviated by the big cone filter.

NZ951

Damn I love those side skirts!

special tool

NZ - do you have any skirts in that color??

NZ951

I just adore mauve... its simple delicious