Newby Help Maffless Tune

[33sleeper]

Hey guys and gals.

I'm a first time skyline owner and first time poster. I've recently purchased a very modified r33gtst. It's had extensive work done on the motor and impossible for me to list all the modifications but I'll try.

Fully forged rb25 only 20000kms old.

Cp pistons

Manley rods

Crack tested block machined and decked

Recon and hiflowed head

Massive garret turbo

Greddy forward facing plenum

Greddy fmic

750cc injectors

550lph fuel pump

3 1/2 " tbe

Microtech lt12s with a maffless tune with just over 300kw at on 18psi.

And that's only what I know about the car.

Now I'm having a couple of issues right after buying it. It blows a lot of smoke on full boost and there is a very strong non fuely almost chemical smell after you give it a bit of a boot. I've spoken to the guys that done a pre sale check on the car and they said that the motor is still brand new and has 160-165 psi on all 6 cold and hot.

Also it's first start of the day it runs very rough for about 5-6mintues then clears it's throat and all is happy again.

I used to own a heavily modified Subaru and know absolute jack poo about Nissans let alone a maffless tune. I have suspicion that something maybe wrong with the car with all the black smoke it passes the strong smell of something on full boost and these horrible cold starts. Despite having spoken to nearly everywhere the car has been worked on in the last 5 years and being assured it's fine by the likes of boost works jaustech southern performance and a few others. I still think something might be wrong. How much smoke is normal for this kind of turbo car? If anybody could shed some light on this or if anybody I'd a maffless tune guru please give me your 2cents. Any help is much aprectiated.

[Ben C34]

Its the tune.

Micro crumb isn't helping.

[33sleeper]

Hmm ok then. I should also mention sh#thouse fuel economy very slight fuel smell in oil. The car otherwise runs amazing and the power delivery is incredible.. so worried that something is messed up.

[DJBarnstar]

Too rich. As per above get a different computer / tuner. It will then hammer.

[Gcjosh]

Could be a few things with the smoke, first what color smoke is it?

If the valve cover breathers are done incorrectly as a lot of people tend to f**k that up for some reason it could cause smoke on boost.

To much oil pressure for the turbo can also cause smoke iirc.

Just to name a few

[SkudR33]

Fuel smell in oil, black smoke on fill boost - I'd definitely say she's running rich. Also cold starts may be terrible because it's running excessively rich when the temps are down to keep the engine running. First thing I'd recommend is to get the tune looked over by a tuner who specialises in microtech ecu's.

[GTSBoy]

a tuner who specialises in microtech ecu's.

To be fair, that's anyone who can use a hammer or a crowbar.

[SkudR33]

Lol microtech ecu has its pro's and con's just like any other ecu. I'm running one with my rb2530 setup - it's worked wonders for me and only cost $1300

[33sleeper]

Well thank kcuf it's nothing major.

Thanks for the input guys. Will have to get it retuned shortly. It was tuned at the end of august by one of the most reputable tuners in Adelaide.

I'll take it to Sean at boost works.ive heard that man can do wonderful things.