I know this sounds ghey, but i want to turbo my 1992 318i e36. My friend said he will give me his rx7 series 4 turbo if i do it. Are these turbo's ok to use on my engine? (seeing as that rotaries can rev very high and i dont think my 1.8ltr could) Anyway the motor i have in it is a 1.8 ltr m40? or 42 im not sure. its the same motor as in the latest model e30's (the one that still uses a cam timing belt). I only want about 7psi just for now to see how it goes. And another thing i have a limited budget. Heres a list of things i think I may need to do to my motor to compensate for the extra air
- decompression plate
- mild head porting
- pod filter
- custom exhaust manifold (or unless i can find one already made up)
- reprogrammed ecu? or piggyback chip?
- cam if needed? ( i dont want it to idle like its misfiring though)
- new stock clutch
- lightened flywheel
- injectors? (or will the stock ones be ok?) What cc are the injectors on my motor anyway?
will the stock pistons and rods hold up with this kind of boost? if not then i dont think i will do it because i know itll be expensive for new pistons. And if i do that i might as well get another or go crazy on this motor. I only want to turbo it because here in Melbourne, Australia not many people modify bimmers. I dont want it to be just another 318i. Just a little extra go would be nice thats all. And please dont tell me to buy an m3. i cant afford one. Any help and suggestions would be very appreciated. (sorry bout the long thread)
What year is your car? That will tell us what engine you have. Turboing your 318 is possible, and I understand how things go outside of the US: often modifying is far less expensive than buying the upgraded vehicle, making the modding a reasonable expense. I really don't know much about installing turbos. Just keep checking. SOmebody will respond with some good knowledge. I am thinking that fitment may be an issue depending on the dimensions of the rx7's turbo, but I don't know te actual size, so I am just guessing. It sound to me like it would be a cool thing to do. Keep us posted.
AU$2500 max i think. i'll do all the labour myself anyway, all the fabrication such as the turbo manifold and welding up the intercooler piping.i just need to know what im missing in my list. And if its only 7psi boost will i still be able to use the standard computer? or do i have to get a chip for it
I just bought my first BMW so I don't know a bunch about them yet, but my last car was a Dodge Stealth TT so maybe I can help.... vincentwashere was right, you will need to upgrade your fuel system with bigger injectors and possibly a bigger pump. You won't be able to use the stock ECU unless you chip it, or you may be able to keep the stock ECU and add an air/fuel controller. You will also have to have a new set of exhaust manifolds set up for forced induction.
Like I said I don't know much about BMW yet, but you may also need a bigger MAS and a larger intake manifold. You will also have to find the proper spark plug gap so that you don't detonate a piston.
Turboing is not a easy or cheap process. If you dont have alot of disposible income and/or a main daily driver dont even THINK about turboing your motor.
Your first custom turbo setup will always blow the motor, I dont care what PSI you run. You'll almost certainly detonate unless someone who knows what they are doing programs it for you and you use a setup that is already proven to work.
There is no such thing as a "safe" PSI when dealing with custom setups because every setup will produce different CFM @ x PSI..CFM is what matters.
The motor you have there is turbo-able, but if you use a thicker HG make sure to at least go with a MLS HG.. and don't go too thick. Dont use copper unless you plan on o-ringing the block/head.
I've done a custom turbo on my e30 and I do them for a living where I work and turboing is 3 things: not easy, not cheap, not for your main vehicle.
If you go ahead with it, I HIGHLY HIGHLY HIGHLY recommend you pick up Corky Bell's book "Maximum Boost"...some things are in-accurate but overall its considered the bible for many when it comes to understanding turbos.
Btw: depending on the setup and how much custom welding you can do for yourself, plan to spend at least $4,000 USD making a semi-decent custom turbo from nothing. All the piping, small fittings you dont think about, ignition and fuel control, injectors, turbo, etc.. all add up, fast.
That $$ ammount is assuming you dont touch the internals of the motor and dont upgrade to lower C/R pistons, etc..
people will say you can build one cheaper, but they usually dont add every penny spend on small fittings, etc. trust me, I have. And I bought most my parts on ebay or @ a junk yard for my e30 turbo setup.
thanks to you all for the help. I've decided to do it. I've bumped up my budget and am in the process of asking around for prices on parts. If any of you have any suggestions on what are good websites (remembering im from australia) for auto parts please let me know because I can't wait to get this done By the way its an m40
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