318ti Turbo Conversion info needed!!
 

hello from sunny england,
i have just bought a garrett T25 turbo charger ready to convert on to my E36 318ti compact, but i need to get hold of some low compression pistons and possibly some larger injectors, can any one push me in the right direction?
as over here there all useless, if anyone knows a rough price aswell it would be great


cheers

Parts ...
 

For pistons I would go with JE and Total Seal Rings, no clue on the cost I am thinking like $500.00 for both. Injectors I can get for you let me know what you need.

Price $65.00 ea.

28.8 #
35.5 #
44.5 #

If you are using the stock manifold these are non shrouded injectors so a injector adapter sleve would be required for install.

-Chad

Pistons usually run from $400 - $500 for a set of 4 with rings. I would try talking to Arias, JE, or Paeco and see if any of them have the specs on hand so that you don't have to send in a piston or make a mold of your combustion chamber. Good luck with this and let us know how it works out.

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

"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.

Thanks Guys I Have Been Quoted $650 For A Set Of Pistons With Rings From A Place Called Top-end Performance Near Hollywood, Plus $79 Shipping, Is This Expensive? Does Anyone Have The Websites For The Other Piston Manufacturers At Hand?

Chad:
Im Looking At Fabricating A New Inlet Manifold So Il Let You Know Bout The Injectors, Thanks Man

Cheers All

Try contacting some of these piston manufacturers. Not sure if any have M42/M44 pistons in stock, but I'm sure they'll custom make anything you have in mind. These guys are all top-notch forged piston makers, commonly used in the BMW forced-induction world.

CP Pistons
Ross Pistons
FYI, Ross lists custom 4-cyl pistons for BMW's at less than $500/set.
Wiseco Pistons

I believe Top End does not actually make their own, but rather has JE Pistons make them: JE Pistons

Those Ross pistons are a bargain compared to the TopEnd/JE ones, and probably better quality.

Constant

who sells the fuel controler? and the ecu is good with stock injectors up to 10lbs of boost. i don't know why you would want to get injectors unless you want more boost.
but let me know. the m44 is highly talked about with the turbo on it. the m42 on the other hand doesn't work as good due to the vane air flow in stead of mass air.

The stock ECU at 5PSI boost with AFPR with stock injectors has a HORRIBLE A/F mixture curve.
At 10PSI with stock ECU and stock injectors you can kiss your engine good bye.

SL

PS Mosselman's turbo kit uses T-25 turbo.

im hoping to use a stand alone engine management system called an emerald m3d,not sure what injectors to use can anyone recomend some for me that i can get over here?

ok then what is your suggestion. larger injectors or new software for dme

Both

Where Do I Get It

I Have A After Market Fuel Pressure Regulator Made For My Engine Size And 12lbs Of Boost . Would Just Injectors Work Or What

If you upgrade the injectors with higher flowing units, you must change the software to match the injector size. With the higher flowing injectors + software, the rising rate FPR is unnecessary.

Someone also mentioned earlier that you could use a device to alter the HFM signal, "fooling" the ECU into thinking more airflow was present (like Split Second, Uni SMT6, Apexi AFC, etc). Although this may work for a while, once adaptation takes effect in the DME your fuel curve will change, and you''ll need to adjust it again. In the same way, if you just add larger injectors without upgrading the software, it *may* work under forced induction...for a while. Once the DME adapts over time and reduces the injector duty cycle, you'll start to run lean again.

In the end, it will be like a dog chasing it's own tail. To some, it is acceptable to fiddle with knobs on HFM controllers and clear adaptation every other week. I would rather do it the "right" way, like Ron Popeil says: Set it and forget it!

Constant