yellowshowbalt

im not sure exactly just yet? but thinkins since im running so rich ill put the stock injectors in and data log them. and if its perfic then great but if its lean its even better becouse a 5th injector in front of the TB even if its a small one say a 20 pounder would give me just enough but not flood it out

NJHK

Before you do that...

Understand the importance of your injector duty cycle. Even if your stock injectors might stay rich enough, you want to watch the duty cycle of them to make sure they aren't being over worked and even now, I think your 34 # injectors are being overworked to comphensate fuel.

This is a good reason to get the Interceptor Gauge

Witt

Log your injector pulse width as it sits right now. Then use one of those calculators to check Injector Duty Cycle. I'll see if I can find one on a website real quick. If its less than like 70% at wide open throttle and at redline, then I would say put the smaller injectors back in.

Edit: use this one.

Also, Adam, your post finger is quicker than mine.

selfinfliction

turbo what? i haven't been around much in the last few weeks cause it's getting close to race time for me. but my turbo is holding up better than the **** storm of a mess i made trying to do a blower swap AND i'm pushing 70whp more.

NJHK

I beat you to it

Archie

Again, can anyone tell me if he is doing anything about timing. Or is he gonna have to wait until HPT supports the 2.2L?

yellowshowbalt

im not changeing the timing yet but the smt7 can do this too

Matts95TSiAWD

yellowshobalt, you dont want to put in the smaller injectors, rather you need to hook up the smt7 so that you can lean it out in the 8.8-9.0's area. you want it running around 12.5 under boost.
the smaller injectors will just create problems!!!

and AMG whoever, my car has 720cc's thanks@! and the setup you named would smoke whatever slow junker u gots.

Matts95TSiAWD

....

NJHK

Is your ***** bigger now?

yellowshowbalt

now now matt ps how do i load are last datalog movie

Matts95TSiAWD

lol sry i was itching to get that out.


SHAZBOT yellowbalt, you gots to do a bunch of stuff to them to convert them.... will i see you tomorrow?

NJHK

Fleas?

Matts95TSiAWD

Lice.

and a nasty rash.

yellowshowbalt

im havin dinner at your house i think thats what planed tomarow

Matts95TSiAWD

we can upload the other videos then just bring your laptop.

Halfcent

He has the MAP sensor installed prior to the compressor. It's not reading correctly in that location.

He is using a MAP sensor not designed for the ECM program.

He has his vacuum solenoid connected to a non-vacuum location.

He put in bigger injectors without any change to fuel control.

This is what we have pointed out to him. Now Witt, if you want to tell him what he is doing is OK, then I have to wonder.

Matts95TSiAWD

ive personally run bigger injectors with a stock fuel pump and an AFPR and it works fine!

the non-vacuum location your speaking about is creating -20 VAC on the guage. so i dont know what you are talking about...

the MAF is before the compressor, the MAP is sitting on the compressor.

yellowshowbalt

ill be posting tomarow my new video a clear view of what my afr is and with dataloging too it will be posted on youtube and every one will get a better picture of whats going on under boost and when not under boost

my map sensor is the original one off the plastic 2.2 intake DO I NEED TO SHOW ANOTHER PIC so every gits and understands what i have done. "GOSH"

halfj99

lol this is a fun thread to read

Halfcent

You can't use and AFPR on the Cobalt. It's returnless.

The non-vacuum location is on his intake. He connected his vacuum solenoid there. He even shows it in his video He called it the "evaporator tube". There is no vacuum created before the Throttle Body. I'm not talking about his boost/vac gauge. However, that, along with his vacuum solenoid and his MAP, should all be connected to the manifold.

I wasnt' talking about the MAF. And your right, the MAP is sitting on the compressor housing, before the actual compressor output, where his IAT it supposed to be. That is not manifold pressure.

Using a 1BAR MAP under boost will send an incorrect signal. Plus, like I already said, its not mounted in the right place. The actual air pressure in that location is variable due to the bypass valve.

yellowshowbalt

ok maybe this will help alittle the evap is in the wrong place i know this. i should get its presher from where the boost gauge is but in a bigger port. when i first start the car it tells me to check the gas cap. . the map was a hope and best guess that it would even work

Matts95TSiAWD

ahhh some useful information!

i think i understand what you mean about the vac soleniod, i will check it out when i can look under the hood again.

i did not say that i had run an AFPR on a cobalt i know its returnless. i had run it on my dsm before i put my walbro255 in.

NJHK

Dude...you're comparing apples and oranges.

Adjusting Fuel Pressure to have the fuel injectors idle correctly with a AFPR is fine and accepted.

He has a RETURN-LESS FUEL SYSTEM which does not have a Fuel Pressure Regulator to keep a base fuel pressure in the fuel system (well fuel rail). His fuel pump is maintaining fuel pressure in the fuel system.

Matts95TSiAWD

and it seems to be doing so just fine if the wideband reads down to 8.8..... thats rich as fukkk...