m20b25 Maf conversion

[Patto]

Gday again.
Compiled all the parts required for the Haltech Elite 1500 to be installed on my little NA m20b25. Only thing left to sort out is MAF. Is it necessary?

Any recommendations on what to use? I've seen references to a discontinued Bosch unit #0280218032 but that's about all I can find.

Any advice would be greatly appreciated.
Thanks in advance. Al.

[digger]

no use the inbuilt map sensor

[Patto]

Thanks again Digger. Plans changed significantly since my last post in 2020. Ended up just getting the stock crank cleaned up and polished, rods polished and balanced, arp throughout, went 84.5mm mahle pistons and a Bimmerheads ss885. Runs fairly well on the stock ecu. Bought an Elite 1500 with their premium harness, ic7 dash, wideband, LS coils, m50 tps and adapter plate, bunch of sensors, fuel reg etc mrt trigger cover for the cam etc. All here ready to go. Booked in with Matt Sims performance for the install and tune next month and mtech2 bodykit and paint the following month. Will definitely upload a thread on it once it's actually looking decent lol

[digger]

why not elite 750?

im going to update to an elite, i will be repinning to use the same harness as my current "PNP" ecu which is an old Wolf V500

[It's Soda Not Pop]

I'm curious to see what a 2.5 with some mods and a standalone will make power wise. What boxes did you tick for your supersport head (cam, springs, valves, rockers, etc.) Did you raise the compression?

[Patto]

I ticked all the boxes (hd Rockers, double valve springs etc) plus optioned the Schrick cam. I actually went slightly lower comp and mls as I intend to boost it later this year.

Digger, just went 1500 under recommendation from a mate of mine. Probably could have got away with a 750. Not particularly well versed on the computer side of things.

[Patto]

As it stands. The list is as follows.

Head - Bimmerheads SS885:
Valves ground
Valve seat ground
New valve guides
New valve seals & cam seals
New intake studs & exhaust studs
Dual valve springs
Heavy Duty Rockers
Ported & polished
Schrick 280/274 Camshaft

Nuke Adjustable Cam Gear
ARP Head studs
MLS head gasket
Gates timing belt n pulley
New OEM water and oil pumps

Exhaust - Na setup
Hartge H23 Stainless Alpina style headers
Twin 2" collectors into
Redback 2.5" high flow cat
Stainless hotdog
Remus rear muffler

Bottom End - 1990 325i Block dipped and cleaned throughout, new sleeves
325i crank & rods balanced
84.5mm Mahle Ultimate forged 325i pistons (0.5mm overbore)
ACL race rod and main bearings.

RHD Chromoly lightened flywheel
Stage 2 sports clutch and plate
Z3 short shift and throw kit
Garagistic DSSR and billet knuckle
Z3 steering rack
Hillside reinforced engine crossmember
Hillside reinforced rear subframe
Hillside reinforced trailing arms

To be installed in may:
Elite 1500 with ic7 dash
Haltech wideband
LS coils
Mrt trigger plate
Turbosmart FPR
All bosche sensors for pressure and temps etc
M50 tps

[digger]

As it stands. The list is as follows.

Head - Bimmerheads SS885:
Valves ground
Valve seat ground
New valve guides
New valve seals & cam seals
New intake studs & exhaust studs
Dual valve springs
Heavy Duty Rockers
Ported & polished
Schrick 280/274 Camshaft

Nuke Adjustable Cam Gear
ARP Head studs
MLS head gasket
Gates timing belt n pulley
New OEM water and oil pumps

Exhaust - Na setup
Hartge H23 Stainless Alpina Headers
Twin 2" collectors into
Redback 2.5" high flow cat
Stainless hotdog
Remus rear muffler

Bottom End - 1990 325i Block dipped and cleaned throughout
325i crank & rods balanced
84.5mm Mahle Ultimate forged 325i pistons (0.5mm overbore)
ACL race rod and main bearings.

RHD Chromoly lightened flywheel
Stage 2 sports clutch and plate
Z3 short shift and throw kit
Garagistic DSSR and billet knuckle
Z3 steering rack
Hillside reinforced engine crossmember
Hillside reinforced rear subframe
Hillside reinforced trailing arms

Elite 1500 with ic7 dash
LS coils
Mrt trigger plate
Turbosmart FPR
All bosche sensors for pressure and temps etc
M50 tps

nothing shows up?

edit must be text colour and dark mode

Arent the Mahle ultimate forged 325i pistons are for 2.9L ? or are they doing them for stock crank now?

[Patto]

Works fine on my end lol

I'm guessing I should probably change to a bigger injector (currently running a new set of oem 325i bosch units) but I suppose we'll find out when tuning.

[digger]

Digger, just went 1500 under recommendation from a mate of mine. Probably could have got away with a 750. Not particularly well versed on the computer side of things.

normally the 1500 is for 4cylinder (4 injector and 4 ignition outputs) and 750 is suited to old school NA 6 cylinder more of an ecomony option without bells and whistles . Can still run a 6 on 1500 in batch injection and waste spark

[It's Soda Not Pop]

I ticked all the boxes (hd Rockers, double valve springs etc) plus optioned the Schrick cam. I actually went slightly lower comp and mls as I intend to boost it later this year.

Digger, just went 1500 under recommendation from a mate of mine. Probably could have got away with a 750. Not particularly well versed on the computer side of things.

I have the same head. Except I used their 280/274 cam.