325 turbo build

[murphykidd]

Hi lads, just got around to finishing my conversion in the e36 from 318 to 328 all going well and no problems so far.

It's time now to start work on my 325 I have it's a '94 m50b25 it currently an automatic but have a box there for it. In going doing a turbo setup on this and I want to do a right job and do it right first time. Time isn't a issue really with this, I have no deadline and no rush with it I want to take as much time as it needs to do it right first time and not cut any corners.

So basically what I need is any Info ye guys got on doing a turbo build, if ur done one yourselves or know of any good threads online ect ect..
I'm also looking for a few names of a few places to gather a couple of bits,
I'm going to be doing internals on this so there will be upgraded cams, head studs ect ect ye get the jist ha..

So any info would be great lads on manifolds, cams, intakes, turbo, all the crack, should be starting this mid/end of January when I have room cleared up in the garage.

[Steve320]

my turbo m50 guidelines

_ engine requirements
-mls head gasket / multi-layer gasket (budget)
-arp head studs (no budget alternative)
-arp conrod bolts (not necessary )
-pistons/conrods upgrades unnecessary but nice
camshafts generally 248/248 (uneccassary)
intake manifold is fine but upgraded manifold helps when adding a boost controller(or use vems for boost controller without manifold upgrade ($300 eBay - 2.5k custom)
turbo manifold (can copy mine for cheap) lhd won’t fit dowpipe
injectors (I’ve 60b)
fuel pump (I’ve a walbro)
front mount intercooler (I’ve cxracing cheap and cheerful)

-TUNING
miller war chip with MAP will be cheapest and easiest
gstuning do a vems ecu for 720 pound much more advanced but a lot of money for what it is ,
if no vanos a nice plug and play is very easy

CLUTCH
m20 lightweight single mass flywheel
sachs 618 pressure plate / or e53 3.0d x5 pressure plate
upgraded clutch plate … clutch net.com
or else go all out and get a tilton etc etc

GEARBOX/DIFF
328i/3.0 m3 is strong unless you want to go 6 speed
small case diff won’t last pissing time
medium is the only way , if you have a welded diff make sure you reinforce the floor pan as the extra torque will rip the trailing arms out of the car and crack subframe mountings (just going on what I’ve read I’ve no personal experience with welded diffs hah)

BRAKES
brakes will need upgrading with all the extra power options are limitless here, I’ve evo m3 rears and e46 330i fronts

COOLING
metal water pump
metal thermostat housing
m3 rad is always the best or go custom
bigger is better
oil cooler is a good idea several ways to go about this I’ve euro m3 oil cooler housing



TURBO
I’ve a genuine gt3582r (garrett)
this is a grey area but if you want to go balls out get a gtx ball bearing turbo (mine is journal as its cheaper)
judge the turbo size depending on appicantion bigger means more lag and reduced torque curve so harder to drift , smaller is nicer to drift as more instant power
with turbos you get what you pay for ,in certain ways i do regret getting a garret as it needs both oil and water lines which makes things more awkward other turbos just need oil,
get the oil feed from under the intake manifold (kit available)
return to sump with a 45 degree angle bung so no need for scavenger pump then ,
water supply lines are from the throttle body lines,
with turbos you get what you pay for so don’t get shitty eBay
you will need to replace windscreen washer bottle so get creative
also depending on your turbo you may need a external waste (I’ve a 38mm tial) this is for when you have a non waste gate turbo but a wastegated can be modified for it , bov if you don’t have a external waste gate



herre is an example of a full spec list of a 590hp m3 engine in america so you can judge for yourself

Build sheet (over 27k invested):
Exterior:
Modified E36 bumper for inter cooler airflow
DTM style front lip
DTM Fiberwerkz GTR-S vented front Fenders
DTM Fiberwerkz Rear Fenders
DTM Fiberwerkz Carbon fiber cannards
AC Schnitzer Authentic side skirts
AC Schnitzer Authentic rear bumper
Custom hood cutout for turbo fitment
Clear turn signals
Euro Tail lights
Xenon headlights
Front tow hook - Red
Rear tow hook - Red

Interior:
Sparco Sprint 5 driver seat
Sparco Milano Passenger seat
Sparco Driver seat mount
Sparto Passenger Seat mount
Sparco Slider / Driver
Sparco Slider / Passenger
TC Kline 6 point bolt in roll cage - White
OMP steering wheel
Sparco Steering wheel mount
Alpine Deck with Ipod hookup/CD player
AC deleted:
Fire extinguisher (needs a new bracket)

Innovate Air fuel gauge
Defi Display (Displays Oil pressure and Oil temp)
Defi Link-II -
Defi 60mm Boost Gauge
Defi 60mm Fuel pressure Gauge
Defi 60mm Exhaust Temp Gauge
ATP dual gauge holder

Motor:
S50 Motor rebuilt with only 42,000 miles!! Since Motor refresh with Head gasket, ARP studs etc has about 2,500 miles and <2hrs track
Cometic Head gasket .0140 to lower compression
ARP head studs
Precision 6466 Dual ball bearing turbo .84 A/R (Less than 1000 miles on turbo) - comes with 1 year warranty, few mths left on warranty)
JV 666 top mount manifold - T4
Turbosmart 45mm wastegate
2.5 inch piping on hot side
3 inch piping on cold side
3 inch downpipe - DEI exhaust wrap
3 inch exhaust without catalytic converter. Cat available as a spare;
Technica Motorsports 60Ib injectors
Technica Motorsports OBD-I Tune (final live tune about a year ago); 598 whp at 20 psi
Technica Motorsports MAF
Technica Motorsports Aeromotive 340 fuel pump kit (<1k miles)
OBDI tune
Aeromotive Fuel pressure regulator (<1000 miles)
Fuel rail modified to fit -8 AN lines
AN fuel lines from fuel rail to fuel pressure regulator
HKS SSQV Blow off valve
24x12x3 inter cooler
Spal low profile 16 inch high flow fan
Zionsville Shroud
Zionsville Metal Tank
Oil cooler with AN lines
VPD Oil Cap
Mishimoto Radiator
DEI Titanium turbo blanket

Tranmsission:
Clutch Net Stage 5 with 6 puck disk (same time as turbo)
Z3 M short shifter kit
OEM guibo replaced about 2 months ago
Aluminum Rear diff mounts

Suspension:
Ground control front coilover adjustable
Ground Control rear coilover adjustable
Ground Control front camber / Caster plates
Racing Dynamics Front adjustable sway bar
Racing Dynamics Rear adjustable sway bar
Racing Dynamics Front Strut bar
Racing Dynamics Rear Strut bar
Turner motorsport RCAB (Rear control arm bushings)
VAC motorsports Aluminim Motor mounts
VAC motorsports Aluminum Transmission mounts

Wheels:

Varrsteon ES7 (not a single scratch on all 4 wheels)
Front: 18x10.5 +10 offset on NT01 275/35/18 tires
Rear: 18x10.5 +0 offset on NT01 275/35/18 tires
Turner bullet nose wheels studs

Work performed over the last three months:
Oil change
New spark plugs
Ignition coils
Fresh drive shaft
Guibo replaced
Turner 71 degree racing thermostat;

Spares: two OEM wheels with street tires.
Carbon fiber wing - brand new not installed!!!
Kill switch - brand new not installed
FIA 3’harness - brand new
Vynil #decals
Miscellaneous minor spares.

hope this helps ciaran

[murphykidd]

That is insane Steve man, exactly what I was after man thanks use it as very good guideline I no what I must go after now and make a start.

[Steve320]

No worries , if you want I'll send you a few photos of the manifold so you can get it fabricated up , it's fairly basic so a good tig welder would mock it up very easily


Sent from my iPhone using Tapatalk

[Hobbs]

Dont forget to budget for the price of the basics either. Honing the block, skimming/machining the head, valve stem seals, re-lapping valves, chain guides/tensioner, gaskets etc. if going for lumpier cams, be best to upgrade valve springs too.

Looking forward to seeing how you get on, needs to be more engine builds on the forum!

[murphykidd]

Just ordered vanos removing tools and new engine stand as other one is been used.! Shit just got real haha

[Steve320]

great to hear ciaran , won't be long now until a huge turbo will be hanging off it

[murphykidd]

Hopefully so Stephen, just waiting on the vanos tools now to make a start. And will start a thread then on it and usual Facebook too