318ti Turbo Conversion info needed!!

[318.g25]

Then What Do You Suggest I Use (what Are You Running On Your Car)!!
I Work At A Bmw Shop In Southern Louisiana And Can Do What Ever I Want

[Constant]

You might want to check out Technique Tuning. These options are for DASC cars, but you could follow the same route with turbocharging.

E-mail NickG and he may be able to help. Unfortunately the market for forced induction tuning on 318's is tiny in comparison to other marques.

Constant

[318.g25]

What Is His Email Address

[KIRASIR]

Nick is one of a VERY FEW people who can reprogram your ECU properly. His contact info is on the website. He quoted me 800USD last year to reprogram my ECU. The price included 4 new injectors with adapter rings.

Originally Posted by Constant

You might want to check out Technique Tuning. These options are for DASC cars, but you could follow the same route with turbocharging.

E-mail NickG and he may be able to help. Unfortunately the market for forced induction tuning on 318's is tiny in comparison to other marques.

Constant

[Constant]

Originally Posted by KIRASIR

Nick is one of a VERY FEW people who can reprogram your ECU properly.

He is one of very few people who can, and more importantly, IS WILLING TO reprogram the 318ti's ECU properly.

Serge, do you know at what level the 318ti stock HFM maxes out? I have a T25 from a DSM that's been sitting around for 4 years...

Constant

[KIRASIR]

Constant,

We had this discussion on the list about a year ago (I can't find the thread now. It's somewhere in the archives). However, I can tell you the following:

With respect to DASC:
If I remember correctly, James Wu maxed out the signal from his HFM last WINTER at 8PSI more than once. And I think at least one more list member has had this problem in the past. I also remember Nick mentioning that with Stage II at 8PSI the HFM is almost at the peak of its capacity (I don't remember the actual numbers).

With respect to T-25:
It is really hard to say. We would have to compare the CFM of T-25 to CFM of the Eaton blower then make a conversion to PSI for T-25 then apply temperature corrections. I've personally had ocasional boost spikes up to 8-9PSI and a couple of long pulls at 7PSI with T-25 without any check engine lights, so you should be safe until at least 7-8PSI.

Don't you also have the diesel manifold sitting around as well?

SL

Originally Posted by Constant

He is one of very few people who can, and more importantly, IS WILLING TO reprogram the 318ti's ECU properly.

Serge, do you know at what level the 318ti stock HFM maxes out? I have a T25 from a DSM that's been sitting around for 4 years...

Constant

[318.g25]

So to run 7psi you didn,t need any extra fuel or what

[KIRASIR]

Extra fuel is currently provided by AFPR. I personally wouldn't recommend running any boost pressure over 7-8PSI with AFPR.

Stock programming + AFPR + stock injectors = one really crappy A/F curve.

SL

Originally Posted by 318.g25

So to run 7psi you didn,t need any extra fuel or what

[318.g25]

Thanks For The Equation It Actually Helps Believe It Or Not.. Now Does Exhaust Systems Affect Running Conditions At All? I Have A Straigt Pipe In Front And A Supersprint Back Half.

[Constant]

Originally Posted by 318.g25

Now Does Exhaust Systems Affect Running Conditions At All? I Have A Straigt Pipe In Front And A Supersprint Back Half.

A freer-flowing exhaust will reduce backpressure in a turbocharged car. This can contribute to earlier spooling time and greater boost.

Constant

[Freedy]

If you are using a turbocharger, you should definitely have a 3-inch diameter turbo-back exhaust. Mk3 Turbo Supras gain 60-70 rwhp from a turbo-back 3inch exhaust. I am not ****ting you, Ive seen the dyno sheets. Thats compared to either a 2.25 or 2.5 inch stock exhaust. Replace everything and mount the o2 sensor to the piping.

[GDB]

Originally Posted by Freedy

If you are using a turbocharger, you should definitely have a 3-inch diameter turbo-back exhaust. Mk3 Turbo Supras gain 60-70 rwhp from a turbo-back 3inch exhaust. I am not ****ting you, Ive seen the dyno sheets. Thats compared to either a 2.25 or 2.5 inch stock exhaust. Replace everything and mount the o2 sensor to the piping.

There is alot of tuning that goes into finding the optimum back pressure. If the pipe is too large then the exhaust will not excape as quickly. 3 inch piping may work great on a 3L Supra running 20ish psi, but on an M24 running 8 psi, it will not be near as effective.

[ZeroG]

Originally Posted by Freedy

"hello i have a 97 with a mosselman turbo (g25)i was wondering if anybody has a air\fuel ratio gauge hooked up and what the reading is and how to fool the computer"

I would suggest that you buy a wideband 02 sensor and guage because thats the easiest way to tune your engine precisely. It will cost around $300-400, but will be well worth it. You can also buy a fuel comtroller that adds or takes out fuel at various RPM points by cutting the voltage of the AFM signal.

Someone else needs to chime in about how the 318 CPU works to measure air flow.

I have the autometer Air/Fuel gauge and it looks really cool when it lites up but other then that it is completely worthless. It cost me like $200.00 including the sender and is not worth the space that it takes up. But if you are into looks its for you. As to measure Air/Fuel use a Lambda Meter or the AEM Wide Bahn Kit.

As for controling fuel you only can do so much with AFPR. The next thing would be bigger injectors and a piggy back kit to run them. I use the Split Second MAF Kit with the ARC II, and it has been working well.

-Chad

[318.g25]

thanks man i've been waiting for some more info.

[needle332rur]

I have a brand new t-25 for my 95 obo1 Ti. This is the steps i was planning on taking to get everything sorted.

-wideband o2 sensor (AEM makes the guage and sensor as a kit for around $200)

-custom made manifold running to the front of the engine so he turbo will sit between the radiator and the timing cover. (better oil drain)

-Front mounted intercooler with 2.25 charge pipes

-slightly larger injector (don't know what stock are so tell me if you do)

-boost sensing rising rate FPR (vortech)

-SMT6 to perfectly control fuel, and also retard the timing uner boost.

w/ this set up run around max 8 psi boost

after i buy forged pistons and maybe megasquirt (well have to see how well the fuel managment works) 15 psi

m42 is one strong motor only problem with it and forced induction is the compression.