m50 hx40 newbie need some opions

[thehowitzer]

hey guys so i drive 1991 318is 4 door alpine ehit love it came acro2s a m5o last week with 65k on it 5 speed zf trans and the z3 short shidter with and cut wiring harness it was a smoking deal for 400 usd so i picked it up. now here is my dilema i bought the car to run a boosted i6 at some point and i am getting the parts to do the motor. i have a hx40 that has a fresh rebuild on it on my desk, i a machinest so i have access to to make most anything i need. what would be a good solid reliable setup i know i am bout to get hated on this question has been asked a million times over but i am think go the standard megasquirt run the hx40 wich is big, and go ahead and oring the block. whats ur guys thoughts? i am thinking i can make a solid 400- 425 rwhp with meth injection and it be a solid dd

[The Humjet]

A lot of guys out there run m50 turbos on standard internals with just an o-ring, they're pretty capable motors and 400 whp is a realistic goal, any details on the motor how the condition is or whether it has vanos and what size is it a b25? you gotta tell us more details.

[xwill112x]

first post was hard to read..but i think i got some info out of it... hx40 is big...like that comes stock on a cummins diesel i think..a gt35r would be a better choice if you dont want to wait a year for boost. dont think you would need meth injection for those numbers... i was told by a reputable tuner that a nvm50b25 with a gt35r, and misc other things will make towards of 400wheel at 11psi..

[thehowitzer]

sorri about i being difficult to read i wrote it on an iphone. my mistake the turbo is acauly an hx50.... its 65k on it appears to be really good shape compression checked out just fine. it is a vanos motor apparently there is away to delete/or lock it. this isnt an argument i am sure u no more than me but i heard the thx35 are the same as gt35r but spool faster any truth to that? i wanna run meth as a safty net my buddy who is a reputible tunner swears by it then gives me the option to run a hell of alot more boost later. when o ring the block i can run stock headgaskets and metric blue studs? as far as fueling what injectors should i run i am gonna run walbro 255 fuel pump. . if any buddy has some input or suggestions that would be great that later goal is 500whp reliable but i wanna aim for 400whp on a reasonable amount of boost and learn how to drive the car with 2.5 times the power it came with

[Good & Tight]

HX50 is going to spool very late in the rpm with a stock 2.5. HX35 would be a much better choice and be good for 400whp for a stock engine.

[mohamadr89]

HX50 is going to spool very late in the rpm with a stock 2.5. HX35 would be a much better choice and be good for 400whp for a stock engine.

hey i have a stock s50 motor that i am swapping into my e30 and i want to turbo it aswell. if i got a hx35 would i be able to run it with my stock engine? if not what would be the main mods you recommend for me?
thanks-moe

[ak-]

My good friend's experience:

m50v
gt35 ball bearing
MLS head gasket; lower compression
ARP studs
3'' down pipe all the way to exhaust
14psi RMS tuned
305whp / 300wtq

The DD/drive-ability is great.
It lags a bit, but it's great.

[mohamadr89]

My good friend's experience:

m50v
gt35 ball bearing
MLS head gasket; lower compression
ARP studs
3'' down pipe all the way to exhaust
14psi RMS tuned
305whp / 300wtq

The DD/drive-ability is great.
It lags a bit, but it's great.

what is better? vanos or nv?

[Good & Tight]

hey i have a stock s50 motor that i am swapping into my e30 and i want to turbo it aswell. if i got a hx35 would i be able to run it with my stock engine? if not what would be the main mods you recommend for me?
thanks-moe

Stock S50 on 7psi with an HX35 should be in the 350rwhp range. I wouldn't run more than 9psi on a stock engine, anything more then you need to drop the compression with MLS and head studs.

[mohamadr89]

Stock S50 on 7psi with an HX35 should be in the 350rwhp range. I wouldn't run more than 9psi on a stock engine, anything more then you need to drop the compression with MLS and head studs.

wow thats amazing power and good info. just a few more questions if you dont mind... i bought a wrecked 95 m3 so im using the motor tranny and ecu. is the motor vanos or vm and whats the difference. and which transmission do i have? also, if i did do that turbo setup you said, just to be safe i should get the head studs too right? sorry if i had any dumb questions but i would like to know. thanks again

[mohamadr89]

Stock S50 on 7psi with an HX35 should be in the 350rwhp range. I wouldn't run more than 9psi on a stock engine, anything more then you need to drop the compression with MLS and head studs.

oh yea and whats mls? im sorry

[The Humjet]

Multi layer steel (mls) gasket made by cometic you can go thinner, stock or thicker. A lot of 24v turbo guys have had good success with a thicker gasket and arp head studs. These motors are very capable machines and it doesn't take much to make power, and the gearboxes they come with can handle stupid amounts of power

[mohamadr89]

Multi layer steel (mls) gasket made by cometic you can go thinner, stock or thicker. A lot of 24v turbo guys have had good success with a thicker gasket and arp head studs. These motors are very capable machines and it doesn't take much to make power, and the gearboxes they come with can handle stupid amounts of power

thank you so much, im new to al this swap stuff and that helped out a lot. is all that stuff pretty pricey?

[mohamadr89]

i found the studs for 193.00 which is a pretty decent price. now i just got to look forthe gasket.

[The Humjet]

http://store.vacmotorsports.com/vac---e36-forced-induction-prep--repair-kit-p2215.aspx

This all that you will need for your motor I'd opt for the .140 thick gasket for the s50 motor. On higher boost you should be looking 500whp+. Like I said the s50 is one heck of a motor it's gonna be a real animal under any sort of boost as long you can get a good tune happening this motor is built to go the distance

Also have a look at this for tuning your motor it's a bit pricey for what it is but I do rate Miller products highly and they have great customer service so whenever in doubt Brody will help you get your car running right

http://www.millerperformancecars.com/catalogue.html?page=shop.product_details&flypage=flypage.tpl&product_id=111&category_id=45