e36 325 M50 + .120 MLS + ARP + Megasquirt = 350rwhp?

[EFreak]

M50 + .120 MLS + ARP Head studs+ Megasquirt = 350rwhp?

How does my math check out with no other mods to the engine?

Is it safe to DD and track?


Any turbo reccomendations? I was thinking a holset hc1 or something that I could find used and rebuild.

Expected boost level for 350rwhp? Maximum safe boost level?

[Danny318]

yea sounds good to me. I dont have much insight to offer though.

[2filthy3]

I assume your getting:

Higher flowing fuel pump and injectors.

Intercooler setup.

maybe a wideband o2 sensor

An uprated clutch.


These are 190hp (155rwhp) standard right? I think you'd be looking at around 20psi boost for a 2.2x odd increase to 350whp. Your limited to 21psi anyway unless you get the big map daddy.

I think its possible, but if your tracking it hard, maybe 295whp at ~15psi is a better number, though if you build a good system and have a great tune it would very likely be fine at the track at 20.

I have seen the older m20b25 with Megasquirt with an internally standard engine + .14" mls handle 20psi ok with the supporting hardware (Note this ended up at around 7.8-8:1 CR), and the owner definately tested it very day, if these engines are as strong?...

I dont know about holset turbos, someone else will.

[Hova]

I assume your getting:

Higher flowing fuel pump and injectors.

Intercooler setup.

maybe a wideband o2 sensor

An uprated clutch.


These are 190hp (155rwhp) standard right? I think you'd be looking at around 20psi boost for a 2.2x odd increase to 350whp. Your limited to 21psi anyway unless you get the big map daddy.

I think its possible, but if your tracking it hard, maybe 295whp at ~15psi is a better number, though if you build a good system and have a great tune it would very likely be fine at the track at 20.

I have seen the older m20b25 with Megasquirt with an internally standard engine + .14" mls handle 20psi ok with the supporting hardware (Note this ended up at around 7.8-8:1 CR), and the owner definately tested it very day, if these engines are as strong?...

I dont know about holset turbos, someone else will.

m50 is just as stout, if not more. Not to mention 24v vs 12v so a bit more flow (aka more hp)

[Def]

I assume your getting:

Higher flowing fuel pump and injectors.

Intercooler setup.

maybe a wideband o2 sensor

An uprated clutch.


These are 190hp (155rwhp) standard right? I think you'd be looking at around 20psi boost for a 2.2x odd increase to 350whp. Your limited to 21psi anyway unless you get the big map daddy.

I think its possible, but if your tracking it hard, maybe 295whp at ~15psi is a better number, though if you build a good system and have a great tune it would very likely be fine at the track at 20.

I have seen the older m20b25 with Megasquirt with an internally standard engine + .14" mls handle 20psi ok with the supporting hardware (Note this ended up at around 7.8-8:1 CR), and the owner definately tested it very day, if these engines are as strong?...

I dont know about holset turbos, someone else will.

An M50 will make way more than 350 rwhp at 20 psi. It should be safe to track if you keep it cool.

[EFreak]

Anyone with some actual M50 turbo experience?

I was hoping this was possible on around 12psi with an H1c with full spool around 3500rpms. Sound about right?

[5mall5nail5]

3500 sounds do-able. Depends on what exhaust side you find.

[2filthy3]

I was being conservative on the HP side, but this is the 2.5L m50, i'd think a Minimum 18psi would be needed for 350whp. Or more specifically ~422HP at the crank.

Though i accept i have no experiance with the engine in question.

[EFreak]

3500 sounds do-able. Depends on what exhaust side you find.

Suggestions? I like earliest possible spool without being TOO small but if I want more power im pretty sure I have other things to worry about first

[Def]

I was being conservative on the HP side, but this is the 2.5L m50, i'd think a Minimum 18psi would be needed for 350whp. Or more specifically ~422HP at the crank.

Though i accept i have no experiance with the engine in question.

I'd think it'd still make more than that at 18 psi.

My little 2.0L SR makes about 350 rwhp at 18 psi, and if I had a larger T3 turbine housing that let the engine breathe better it could make about 400-420 rwhp at 18 psi fine.

[E36 TURBO]

Anyone with some actual M50 turbo experience?

I was hoping this was possible on around 12psi with an H1c with full spool around 3500rpms. Sound about right?

I reach 389whp and 360 lb tq in my M50 with full stock internals @15 psi. Hope this help!!!

[95M3032679]

I reach 389whp and 360 lb tq in my M50 with full stock internals @15 psi. Hope this help!!!

Can u specify.
Sofware, Turbo size, mods...etc

[EFreak]

I reach 389whp and 360 lb tq in my M50 with full stock internals @15 psi. Hope this help!!!

Excellent! More info please?

[niks325i]

Excellent! More info please?

Read http://forums.bimmerforums.com/forum...d.php?t=521046

Nik

[protomor]

By my calcs, about 8-10psi on that-ish setup would be around 300whp. 15psi will get you close to the 400whp mark. At least those are my goals on my setup (HX35+MS1+NV M50B25+0.140" MLS)

I don't know about the lag tho. I got to 8psi (my current spring) at 4500rpms in first gear at about 75% throttle. 2.93 rear end

should easily be streetable if you do the MS right.

[madindian1]

no hp numbers, but ebay manifold made to fit top mount hx40 with 14cm2 housing, front mount intercooler, 044 fuel pump, aeromotive regulator,-6 an fuel lines, 660cc injectors, wolf3d ems, running 16 psi stock head gasket and no water injection, griffin radiator with summit overflow reservoir. full boost comes on at about 3500 rpm and rev to 7000 rpm.

[2filthy3]

ok ok.

It's just if the car is ~160whp standard.

Then 390/400whp is 2.4/2.5X that, to me thats very healthy at 15psi.


Maybe the dynos i've been around just read a bit lower than most.

And these engines Just love the boost

[E36 TURBO]

Can u specify.
Sofware, Turbo size, mods...etc

42lb injectors, 3.5 MAF, TO3/TO4 .63, custom reflash made by a local guy in PR, 38mm Tial wastegate........

[protomor]

42lb injectors, 3.5 MAF, TO3/TO4 .63, custom reflash made by a local guy in PR, 38mm Tial wastegate........

Do you know the max duty cycle on those fuel injectors? I'm running the same and wondering if I will max out the injectors at 15psi.

[ReiheSechs]

It would probably be a lot easier to just have a chip burned instead of dealing with megasquirt

[blackbmr325]

It would probably be a lot easier to just have a chip burned instead of dealing with megasquirt

+1

[DavidsM3]

why megasquirt instead of a Trm tune?

[E36 TURBO]

Do you know the max duty cycle on those fuel injectors? I'm running the same and wondering if I will max out the injectors at 15psi.

I really dont know!!

[protomor]

why megasquirt instead of a Trm tune?

IMO an MS is much more tailored to the application than a tune. Also, my motor didn't come with an ECU or harness and I already had an MS. Easy decision for me.

I really dont know!!

hopefully you aren't maxing them out.

[E36 TURBO]

IMO an MS is much more tailored to the application than a tune. Also, my motor didn't come with an ECU or harness and I already had an MS. Easy decision for me.



hopefully you aren't maxing them out.

I don't have that setup anymore. I'm running now a Presicion SC6162R .82, 62lb inj, 8.5.1 pistons, 44mm wastegate, TEC3R etc and @ 22psi I reach 489whp 460lbtq 93 oct fuel. I just change my cams to S50 and should be in the dyno very soon: 500whp cooming soon!!!!