For those that have gone turbo.....

[Ramblin MAn]

For those that have added a turbo after the fact, what did you do about fuel and the ecu? Chip?

[sheepdog]

From what I have seen and read, up to about 6 pounds of boost or so you should be ok.

Any more and you will need something more. Megasquirt would be my recomendation.

[Gunni]

No matter what the boost is you need something to add more fuel,
at 6psi a FMU does the trick, as most often nothing needs to be done about timing, as the IAT rises and the ignition is backed off anyway,
after that a standalone is definitly the way do do it

[sheepdog]

Downing Atlanta is now using a boost sensitive fuel pressure regulator to go up to 7psi. No chip or injectors.

An increase in pressure and/or larger injectors could likely do the same thing.

[asubimmer]

yeah I think I am going to try just the 24# injectors before I put my FMU on. Hopefully I won't even need the FMU. We'll see ;)

[nickmpower]

yeah I think I am going to try just the 24# injectors before I put my FMU on. Hopefully I won't even need the FMU. We'll see ;)


when your off boost its going to be way to rich

[thumper3ld]

when your off boost its going to be way to rich

Easily solved by never going off boost. :p

[asubimmer]

Easily solved by never going off boost. :pyou are a smart man ;)

its going to be fine

[vatos_p]

if you do it , do it right , 1 bar of pressure in an m42 engine with 8,5:1 , forged pistons and a parralel ecu , 4 extra injectors and you will playing with 300++ hp...and 32++ kg of torque...

isn't that nice.........................................

[///Motorsport]

Okay, so I have a question along the lines of the OP, maybe we can get a list of parts that are needed for going turbo?

Turbo- GT28RS, etc.. What gives the best tuned powerband?
Megasquirt- What does this let me use for ECU or whatever, how high can I rev? I am running a DINAN ebay chip now.
(Will this let me not run an IC? How expensive is adding an IC? I think I would want one if going for lots of power?)
Walbro FP?
Injectors- Which are best? (what does 4 extra entail?)
Oil Cooler?
Some sort of intake- bored TB, even ITB?
Manifold- 666 or something, or custom if i can.

How much psi can I run? 1 bar would be nice!
ANy other info on things I will need? Oil temp/pres. and boost gauges..tial wastegate...

[Alpine003]

yeah I think I am going to try just the 24# injectors before I put my FMU on. Hopefully I won't even need the FMU. We'll see ;)

Like someone said, you'll be running rich if you go this route. A cost effective work around would be to use something like the Apex-I AFC to trim your fuel values for better off-boost response and idle.

[asubimmer]

well I sold the fmu and decided to just go ahead and run MS. I figured that it would just be better in the long run.

[silverblades181]

if you do it , do it right , 1 bar of pressure in an m42 engine with 8,5:1 , forged pistons and a parralel ecu , 4 extra injectors and you will playing with 300++ hp...and 32++ kg of torque...

isn't that nice.........................................

300hp with 15lbs of boost?

[asubimmer]

300hp with 15lbs of boost?
15 should be somewhere around 250ish and 20 should be just about 300 if my calcs are right...it kinda late :rolleyes:

[kowalski]

15 should be somewhere around 250ish and 20 should be just about 300 if my calcs are right...it kinda late :rolleyes:


I believe your correct, but it also depends on cams headwork and other things done internally and components used to maximize efficiency of that boost. i bet you could do 300 with a lot of money into components and the actual engine/machine work intakes and the like.

[vatos_p]

it is all about mathematics people...
i know a few things about engines , but all the work is done by my friend ( chriss that is a mechanik )...
it is easy to calculate.. the 318is engine is 140 hp in atmosphere pressure , so if i put 1 bar extra pressure , theoreticly will go 140 + 140 = 280 , because it is 1 bar from the atmosphere and 1 bar from my buddy garrett... so if you play with the head , exhaust and pistons , rings , crank , ignition and other goodies in the engine , will go to 300+ , and then you can hunt down E36 M3 for fun...

i am going to this setup... ( we - me and my friend ) are going to start working the car with 0,5 bar , because the car has 170.000 km , to see how it goes with , and then , if everything ok , will go for 1 bar or 1,2 bar of pressure...
the setup is taking a long time , because we are fabricating all things by ourselfs , that is we are making all thing hapend without paying anybody to do it... my friend is working now for a month in the exhaust manifold ( it is taking time because he is calculating the angles and everything to have 100% efficiency ) , and i have just connected the smt7 , and waiting for him to finish the manifold to go on..( i need to know where exactly the turbo is going to be to fabricate the intercooler arms and the hood ) i have all parts needed , that is 440cc injectors to replace the stock , intecooler ( the setup will be v-mount , with a slight change in the hood ) , top mount garrett 28/60 turbo with internal wastegate , oil cooler , smt7 - boost controler ,gm map sensor 3 bar , smt7 ignition controler , smt7 injection controler , smt7 shift light ,generaly all the goodies that smt7 has. im i fogeting something ?

The car is going to be altered externaly to go along with the turbo setup , i have just finished the rear diffuser , i have done the front , and as i said i am waiting to get the hood done.
i am taking pictures as we go along , and will be posted when finished ...

[Gunni]

assuming ambient temps and charge temps are the same twice as much air should give twice as much power,
I have seen that number go both ways, getting more then twice the stock at 1bar and getting less twice then stock at 1bar,
reason is mainly turbo and intercooler setup,

[Tor Arne Kaasen]

se http://www.turbofast.com.au/freesoftware.html for turbocalc. best way to chek power etc