Im pretty much runin everything in my sig. I have the stock wh1c with the 18cm exhaust on the truck now. with the waste gate plugged off i hitting about 50lbs of boost with pretty much no lag(boost gauge only drops to 20 before im in another gear and snappin the needle back to 50) and after the turbo spools up it doesnt seem the clear up the smoke at all(can put out the head lights...... well pretty much the whole car in the middle of the day with out luggin the engine or holdin it to the floor). Egts r some wat in control(i dont tow much) enless i just hold in to it and start hitting gears it doesnt really get over 1100 except on the top end. Im looking for something thats pretty easy the spool bc i drive it everyday and that will give me quite a bit more power. I kinda figured something around a 66mm to 68mm inducer would be a good start.

 

The reason that you are blowing so much smoke is because you have NO fuel control, I would start by putting a fuel plate back in there and putting your AFC back together. As far as the turbo goes, you will be laggy with a 66. I am in the market for a new turbo now as well, leaning torwards a 64/14.

 

a 66 would be extremely laggy, I'd lean toward a 64mm turbo, maybe even a good 62 for faster spool. You have so much smoke because of a small turbo and I'm sure you're way past it's efficiency range.

 

I'd look at running a 62mm turbo. Spool is decent, mine comes alive around 1700 rpm. The 66mm on my dually seems to be more aroun 1900 or 2000, although more testing is needed. Get your AFC back together and you'll have a faster spooling turbo when you put a bigger one on. No fuel control on the bottom end kills spool up.

Is your pyro post turbo? Who's housing are your running? I thought the 18cm housings were non-wastegated.

 

im looking into going bigger i have my 58/68 non wastegated turbo for sale that would be good on the street.i like it as a daily driver. but i would get your fueling set up before you do anything more.

 

you're liable to get arrested, heck I'd arrest you for smoking like that on the highway. put that thing back together and start over, tuning your fuel input. You're not only wasting your fuel but you're overheating your exhaust with no reason to.

 

Joseph's right, a plume of smoke is expected at the tractor pulls and folks with breathing difficulties won't go there but in the public streets, excessive smoke can set off a reaction...maybe even life threatening. We all know someone who has coughing fits because of lung disease..

 

Well i can see wat ur saying about not throwing as much fuel to it all at once. That will help spool up but on the other hand i can almost instantly spool it up. if u remove the plate and afc ur foot controls the fuel. And about the turbo size i think 62 will be too small bc my buddy is running a 61mm s300 of a old cat motor and it spool very quickly and all he is runnin is full cut dv with no fuel plate or afc. Appreciate the opinions tho

 

Ditch the full cuts, and get the AFC working properly. The bigger turbos won't spool like the stocker. Just because you are blowing smoke doesn't mean your turbo is too small, poor fuel control and poor fuel delivery will cause smoke, and hurt power. I bet with a set of 191's and a tuned AFC will dyno better than full cuts and no AFC. It will definitely drive better. And cleaner. Smoking out intersections is doing no one a favour.

 

you have 150hp injectors, you dont need full cuts especially with a wh1c. my 140hp injectors and 181dv's get my 76mm ht3b screaming and i can build 60+lbs of boost without smoke. 191 dvs are about the biggest you want to go on a daily driver they add sloppy amounts of fuel where a bigger, quality injector can add just as much fuel but run alot cleaner and more efficient. maybe a twin setup would put you where you want to be. remember, more fuel without air = LESS POWER. it sounds like you are putting the fire out and adding so much fuel, the fuel is acting like a cooling system which keeps your egt's in check (wayyy overfueled).

 

So is there no way to control smoke and spoolup with your right foot?

True if you wanted you could stomp it to the floor and fry your engine turbo ect, but as long as you ease into the throttle till the charger lites then roll on into it.

Or am I missing something. Just courious.

 

Yeah, ease into it, no more than 10% throttle, shift at 2000rpm and spend entirely too much time watching the exhaust pipe in the mirror. It gets worse in the summer heat too.

 

Wow.. I would go back to 191 delivery valves and look at some smaller injectors unless you want to burn up that poor motor.
At 50psi that stock turbo (not a HX35?) should be blowing nothing but red-hot air. Is that EGT sender pre-turbo or post turbo? with all that fuel and hot air the motor should be hot. I wonder if youre getting a cooling effect from the extra fuel? Seems like a good way to have the EPA breathing down your neck =(
a 64 turbo is probably as high as you want to go if its a DD. It will be really laggy without nitrous if you had a 66 on there. Nitrous is overkill if youre not competing.
Save the smoke for tailgaters and ricers, heh

 

You can do that, but when you want to hammer on it, its all smoke and no go. The AFC will react faster than your right foot will. Been there, done that, learned my lesson.

 

So what about those old p pumped macks that had a block off plate on them stock. True they would put it on the ground if the driver wanted but if driven with even a little bit of brains they could haul 25k smoke free and with a little more than 10% throttle.