nismorx7

Hi, haven't posted in a while so I figured I'd try the advise of a knowledgeable few.
Here's the delema. My car is in Winnipeg, I need to drive it to Calgary, (14 hour drive).

I have a fully built 13bt, but I was unable to finish tuning the turbo setup before i stored it. I have a datalogit in Calgary but can't get it to Winnipeg. I have all 4 stock injectors and 2 1600 secondaries on hand. The car is running on a T04S04 .70a/r compressor and .96 exhaust, although it hasnt run on it yet. The smallest spring I can find for my wastegate is 11psi. The rest of the motor is all built to handle upwards of 400hp.
The problem I have is I need to drive the car the above distance, but I am unable to tune it with a datalogit before the drive so I'm assuming I can't run my 1600's.

My idea is to run the stock injectors and make a custom spring set to around 4psi (not exactly sure yet what to set it to) and tune it with the commander and a dyno to make it to Calgary, where I can then install the 1600's and tune it with a datalogit.

My questions for you are first off, does that sound reasonable or am I missing something? What suggestions do you have for the spring size before I max out the injectors, or go outside the compressor's efficiency range? Anything else?

Thanks in advance guys.

Aaron Cake

iTrader: (1)

With that turbo I wouldn't run the stock injectors unless you want to live dangerously. Since you have a standalone, just disconnect the turbo. Put a filter on the throttle body, and another one on the turbo outlet and run the car NA.

cptpain

iTrader: (1)

thats how a lot of my friends do when they just finshed their race motors and need to drive it a few miles(3-5) to the dyno

Aaron Cake

iTrader: (1)

Yes, but Calgary to Winnipeg is an 820 mile trip.

nismorx7

My only problem with disconnecting the turbo is I've have done that before and there are a few issues I have with that setup. One I would still need to retune the car and the power output in a low compression motor for a drive through the hills of alberta will be one big pain.

Two, I'm aware of the amount of carbon that builds up when not boosting a t2 motor, especially over a distance that long. I'm sure with a good tune I would limit that problem, but in the past I've seemed to have had more problems running the car in n/a trim than turboed.

Also running the turbo with no boost I'm assuming would bring the turbo well out of its effieciency range, causing excess heat build up which I want to avoid on a trip that long.
*revise* Sorry I just now read how you wrote that, and I think you are telling me to take the turbo off entirely with an NA manifold I'm assuming..? Or a block off plate?


Question though. Looking at similiar compressor maps to the turbo I have I'm still a little confused as to whether running a low boost will still drop me out of the turbo's effieciency range and cause damage to it. Anyone know otherwise?

adrock3217

Not to take the turbo completely off. To simply put a filter on the turbo, and one on the TB. Basically, using it as a restriction on the exhaust, but you will not be boosting.

Ed:it

Maybe I can word this better. With the turbo having it's regular filter on, the exhaust will push the blade on the hotside, causing the front to pull air in. This air is compressed, and pushed out thru the cold side.

This is directed into the intercooler, and then into the throttle body. With a filter directly on the TB, it is running WITHOUT the turbo. It will suck in air directly from the filter, and push the exhaust out the exhaust manifold (into the hotside of the turbo, which will still make the blade move.)

The reason for putting the filter on the turbo, is it will essentially still be "spooling"...but it will be blown into the atmosphere, as you have cut it's ties with the throttle body. So you're turbo will NOT see any different amounts of heat or anything like that, infact, it should see LESS, as you it will be free spinning, no restriction (intercooler, throttle body).


I hope that sums it up?

Aaron Cake

iTrader: (1)

A few things...

You do not need to retune the car. Driving with the turbocharger disconnected is exactly like driving out of boost. You'll essentially be driving an NA, which will do fine in the hills (do you think that every car needs 180+ HP to climb the hills? ).

Carbon builds up as part of a normal combustion processes. If the car is running poorly (or poorly tuned....way rich) then you will build up more carbon then normal. Staying out of boost won't have any effect on it.

By disconnecting the turbo, it will essentially be blowing into the atmosphere. Without the extra airflow through the engine the exhaust side will not be hit hard enough to put the turbo under any real load.

Running low boost will not hurt the turbo but if you do spike you'll fry the engine since you don't have enough fuel.

adrock3217

Wow Aaron, sweet. I finished my edit, and saw you're comment about "atmosphere" It's like we're brothers, but of different mothers, fathers, family tree's, knowledge bases, background......yeah...

nismorx7

Thanks alot guys, I understand what you were trying to say now, sorry you had to spell it out so blantantly. I do think your solution is alot better...

I ran the car in NA trim when the turbo blew last season. The map was set to defualt through the commander and I had some problems with it. For some reason the injector duty cycle hit 88% on me once at 6500rpm! This is in NA trim! NA manifold, stock injectors, no turbo, etc... So i believe I have some other issues to take care of as well.