so i've got an 85 eta that i am planning on parking and starting to work on. i got all the suspenion and interior just need drivetrain. i'm taking my time and buying a motor and slowly building it. this is my first time working with turbo's so i'm going to take my time and get the help i need and do it right. it will be a learning process. these are my choices of motors i can turbo. is their one that is easier to tune then the other? is their one that parts are cheaper or easier to get. i will be building my turbo from parts i can get on forums. not buying some kit. let me know what you think from your experience. thanks for all your comments.
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well one of the most expensive parts can be the exhaust manifold. You can probably find a cheaper m20 manifold then an m50 for a e30. The ebay stainless log manifolds for the e36 are known for cracking. Plus a 524td manifold is easy to find, fit, and modify. There are a ton of maps available to start with. Also a motor build on an m20 is way cheaper then the other 2 motors. But if you want well over 400whp and money and technical ability are not an issue the m50 is the winner. Plus TRM tunes make it a synch if you don't have a local bmw savy tuner.
If your patient, know what you can use, and have cash on hand, you can piece together a 300whp m20 setup for about a grand.Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.
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building your own turbo kit is the best way. Source quality parts to make the kit. Tuning will be relatively the same. It doesnt matter if youve got 4 cylinders or 6.
m42 is expensive to turbo right. ask me how i know
m20 is the cheapest and has the most parts avail for turbo applications
m50 is expensive but can make BIG power.Comment
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m20 is easiest imo. a properly tuned m20 turbo can easily make 300 whpComment
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300whp needs no internal mods. Id suggest the diyPNP unit. I can even sell you a brand new one assembled with a turbo base map loaded. I have a dealer account with diyautotune. But I guess the first step for you would be making a 2.7I motor. I'd suggest welding the head while its off for when you eventually lust for more power.Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.
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What's your goal for the car?
You've thrown in the M42. The I4 is gonna be lighter, you'll have a better handling car, but your power goals will have to be smaller for the $$. For me BMW is about I6 power.Drive it hard. Maintain it well.
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how much $$$ is needed(Approximately) to take 300whp from m20 engine???Comment
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do some research on e30tech.com
there are many different options. start reading it will help youComment
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Depends on how thrifty to are. It always cost more then it should on your first build. If you have some skills, access to a welder, don't mind used or knock off parts, and luck out you can probably make a good kit for $1500. Thats if you know exactly what your doing. But don't forget if your making that much power your going to need a performance clutch. Anything over say 8psi is going to toast your clutch. 8psi will do it to if you rape it hard in the third and fourth gear. On average i'd say most people average about $3k useing quality parts. But i'd suggest a kit from myself or DMS for that much and save yourself the headache.
here is my "thrifty" run down
TCD manifold, dp, 38mm tial wastegate, Rotomaster T4 with .58 AR stage 4 exhaust, 60 trim wheel ($950)
Standalone engine management with boost controller and IAC ($500)
Intercooler ($120)
CXracing interooler pipes ($97)
BOV flange, Godspeed 2-2.5" elbow reducer and t-clamp (free thanks to fatboygarage.com)
e36 variable TPS ($10)
Bosch new 42lb injectors ($235)
Gauge pod ($18 )
Boost gauge ($43)
Maximum boost by Corky Bell ($26)
Metric Blue head bolts ($42)
Oil pan gasket ($6)
Pipe cutter ($14)
LC-1 ($189)
Fasturbo Oil inlet and oultet kit ($51 missing pan bung)
Custom goodridge 3 AN oil feed line ($25)
T4 oil drain flange ($10)
90 degree 10 AN slip fitting ($20)
Pan Bung ($5)
Blow off Valve ($20 ebay special)
GE silicone intake elbow ($80 retail
)
Castro Customs oil feed block and catch can (free!!!)
Valve cover vent hoses ($18 )
Bosch 3330 short oil filter ($7)
Custom wrench to bolt on turbo ($5)
Vbands ($45)
Catalytic converter ($45)
Flex pipe ($28 )
Exhaust hangers ($14)
3" dryer vent ($10)Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.
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keep in mind its possible im sure to have a turbo m20 for a grand but to achieve this hp goal reliably your going to have to spend some more money.Comment
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it had to do with timing and patience. For example i bought a brand spankin new garrett TO4E for 150 shipped. TD manifolds are 100 or less. cx racing intercooler setups are cheap. get junkyard injectors,used begi, used tcd chip, and go to your local muffler shop for scrap tubing for the DP. The guy i bought the chip, begi, and injectors made almost 300whp and he was at a higher elevation.Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.
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