Gas in OIL!!!

[Justin52587]

Ok guys just got done doing 6 bolt swap 2g head 2g intake 550cc injectors full 3 inch exhaust ive changed the oil 3 times and it still smells like gas so i know its not just bc i rebuilt it I hear that its bc i need a tune with 550cc injectors someone help me out ###!

 

[clipto]

Yea man you will need safc or ecmlink to tune those injectors or you will run rich and dump fuel also buy a wideband.Also I would recomend getting a bigger fuel pump like a evo 8-9 fuel pump or a walbro 255.Ecmlink would be way better then a safc fuel controler so you can log and see whats going on.Seems like alot of people on the forum this past few months are in the same boat with getting tuning software.Unfortunitly you can't just throw on fast parts without a way to tune it or it won't work.But if you run about 15psi on that 16g and get a 11:1 a/f ratio on wot on your wideband with a safc controler you should be in the ok range but without monitering whats going on it may be unsafe.

 

[Justin52587]

ty sir i appriciate the advice guess ill be buying those before i can drive it the first time i changed it i was like WTF? smells like gas so i drove it again for about a mile and it smelled like gas again i dont understand how it can run that rich that it gets into the oil...

 

[Alex42590]

i wouldnt drive it like that if i was you... youll flood your engine

 

[2g4me]

If your on a budget, get a SAFC to tune those injectors, put a wideband on there as well, a boost controller and a walbro 255 fuel pump, with that setup you can easily run 23-24psi. I'd suggest if you cant afford a afpr then get a NA FPR and use that. This will get you in the 300hp range.

 

[clipto]

If your on a budget, get a SAFC to tune those injectors, put a wideband on there as well, a boost controller and a walbro 255 fuel pump, with that setup you can easily run 23-24psi. I'd suggest if you cant afford a afpr then get a NA FPR and use that. This will get you in the 300hp range.

Not bad suggestions but I am not sure about him running 23-24 psi safe especialy with those small of injectors.

 

[CanadianTalonTC]

ty sir i appriciate the advice guess ill be buying those before i can drive it the first time i changed it i was like WTF? smells like gas so i drove it again for about a mile and it smelled like gas again i dont understand how it can run that rich that it gets into the oil...

It is that rich because your running larger injectors without compensating. Basically your PCM says fire X amount of fuel from the injector at any given moment. But your injectors flow a larger amount for the same period they are open, so instead of flowing X it flows Y which is a larger amount of fuel. Thus running extremely rich.

Joel

 

[Eclipse2630]

are you blowing unburnt fuel out your exhaust too?

 

[twicks69]

I would be more worried about washing the cylinder walls down as well as bearing damage from gas contaminated oil. Get the parts to tune the car, SAFC, AFPR, wideband O2, and a tune.

 

[clipto]

Don't forget an oil change to boot.

 

[2g4me]

Not bad suggestions but I am not sure about him running 23-24 psi safe especialy with those small of injectors.

Evo's use 560's and run 25psi safely on stock turbo, 23-24 would be fine. I know every setup is different, i was at 27psi on my old 550's and still at low 11 afr's. Was it smart? by all means no, but for my car it was safe. Remember, E316g isnt a "big" turbo, so the airflow isnt that hi at the top, 23-24psi on a 16g would be like 18ish on a 18/20g, with that then i would say to upgrade injectors.

 

[Turbotsiawd]

Your going to need new rings if you keep driving it like that....

 

[JusMX141]

Your going to need new rings if you keep driving it like that....

Rod and Main bearings will be trashed long before the rings are wiped out.

 

[Justin52587]

thx for all the info fellas i havent been driving it execpt to see if gas was in the oil again just ordered wide band and safc so we will see what that does ill get back to you guys after and let u know how it worked out

another question is how can gas get into the oil around the rings and me not be burning oil out of the exhaust? doesnt make any sense to me

 

[T is for TURBO]

another question is how can gas get into the oil around the rings and me not be burning oil out of the exhaust? doesnt make any sense to me

Several reasons, One, because during the compression stroke, there is a lot of pressure being built in the cylinders, and before the fuel in the chamber is ignited, it is looking for a way out. And since the rings are not a perfect seal, that is the first place it will leak out. Second is gravity, the oil is under the piston, the fuel is above. Third, gas is thinner than oil, so it can pass the rings much easier than the thicker oil.

 

[Turbotsiawd]

Rod and Main bearings will be trashed long before the rings are wiped out.

My bad Justin I was under the assumption that the rings were the first to go.

 

[2g4me]

Not true, rings, main nor rod bearings will suffer with 11:1 AFR's, 10.5-11.5 is optimal for our motors.

 

[twicks69]

Not true, rings, main nor rod bearings will suffer with 11:1 AFR's, 10.5-11.5 is optimal for our motors.

Correct, but in this case, he is likely running significantly richer, which is resulting in the fuel contamination. I would flush the oil, change the plugs and get a proper tune on it, then change the oil again.

And yes, I most certainly know what AFR's our engines like.

 

[T is for TURBO]

And yes, I most certainly know what AFR's our engines like.

Suuuuure you do

 

[Justin52587]

ok now i understand alittle better thx for all the info u guys got it all coming so ill repost when i find out if it fixed it or not which im sure it will

 

[2g4me]

Correct, but in this case, he is likely running significantly richer, which is resulting in the fuel contamination. I would flush the oil, change the plugs and get a proper tune on it, then change the oil again.

And yes, I most certainly know what AFR's our engines like.

Agreed, and I wasnt incinuating you didnt know, but its all good, long as were all on the same page and the OP gets what he needs from us

 

[DSMopar]

Rod and Main bearings will be trashed long before the rings are wiped out.

I kindly disagree, being involved in many classics with poorly tuned carburetors I can attest to the rings being destroyed long before the rods or mains...

 

[JusMX141]

I kindly disagree, being involved in many classics with poorly tuned carburetors I can attest to the rings being destroyed long before the rods or mains...

Our cars are not carbureted classics.

Not that it matters for the sake of discussion because ANY engine damage is bad...but the engines in which I've seen such damage may have suffered ring damage as well, although the first issue which turned up long before lost compression or poor performance was rod knock.

 

[DSMopar]

internal combustion engines aren't different... fuel is fuel and rings are rings

 

[Justin52587]

ok guys got 10.1 fuel ratio hahaha waiting on safc still to tune should be fine once it gets a decent tune though