M42 Turbo Build (Semi Budget, keepng AC!) No 56k

[xwill112x]

we keep waiting because turbo m42s are badass. lol

[Schnitzer318is]

LOL sorry guys, been enjoying the car a bunch now... got over 4000 on it since turbo went in, but have been holding off on vids. Reason being is I have a dyno coming mid december and just got some new parts to put in for more boost! :)

Got 46lb injectors and boost controller parts for MS going in which will allow me to reliably run 12psi! I am upping my rwhp estimate to 215. LOL though I'm not holding out much hope for longevity of the head gasket. :)

[BUDNUNTA]

O yeah
This things sick.
Are you going to use one of those GM Solenoids for boost control?
With 46lb injectors im thinking the m42 is possible of 250whp or more with a stock bottom end.
The e36 guys are doing it.
.140MLS and APR2000 Head studs and crank that boost.

I wonder how long the baby diff will last?






Hunter

[e30guydownunder]

sounds good mate, keep at it. I have some 1000cc injectors in the mail :D E85 and 18psi boost here i come

[Schnitzer318is]

O yeah
This things sick.
Are you going to use one of those GM Solenoids for boost control?
With 46lb injectors im thinking the m42 is possible of 250whp or more with a stock bottom end.
The e36 guys are doing it.
.140MLS and APR2000 Head studs and crank that boost.

I wonder how long the baby diff will last?
Hunter

Yes, GM solenoid controlled by MS. I plan on running 12psi up to 4500rpm and then dropping to 10psi higher up to ease the strain on the head gasket. But if it does go, then you are right... new stock gasket, oringing, and arp studs = upping to 15psi all the way through the rev range.

sounds good mate, keep at it. I have some 1000cc injectors in the mail :D E85 and 18psi boost here i come

E85 sounds interesting. I have to do more reading on it as it seems to be the better fuel for boost. Though honestly this is a daily so I should keep it on the conservative side.

[e30guydownunder]

E85 really is the shit for off the wall N/A builds (>14:1 CR) or high CR boosted builds.

It has cooling properties similar to methanol, high detonation threshold. Generally promoting more CR, more boost and somewhat of a misconception more ignition advance (this is entirely dependant on the actual engine and how it works as a system).

I'm going O-rings and bigger bolts straight out of the box, basically counting on winding my turbo out. I'm really keen for you to get to a dyno so we can see how you go with pump fuel!

[SamE30e]

O-ring... blow head gasket, top end or bottom end? Hmmm

[pbr87]

nice build!

[e30guydownunder]

O-ring... blow head gasket, top end or bottom end? Hmmm

For an engine that owes me $500 plus the expense of a headgasket, bolts and o-rings.... WHO CARES :p

[BUDNUNTA]

Im leaning towards the .140MLS over the o-ring
It slightly lowers the CR but are more prone to leak.
I think with the right RA On the mating surfaces and a nice flat block and head it wont leak
E36 people have ran 26psi with the MLS

Thankfully there are a bunch more m42turbos around
R&D





Hunter

[Iain]

It has cooling properties similar to methanol, high detonation threshold. Generally promoting more CR, more boost and somewhat of a misconception more ignition advance (this is entirely dependant on the actual engine and how it works as a system).

I always shoot for more timing than boost, particularly with E85.

Cooler EGTs FTW LOLWTFBBQ.

[Schnitzer318is]

Update: 12/09/09

1. Got the 42.8lb/hr @ 3 bar injectors installed.

2. Rerouted some lines for better aesthetics

3. Oil change (switched to 15w50 as turbo was thinning the 5w20 too much)

4. Working on tuning for the bigger injectors now so I don't drown my plugs on first start.

Pics will come tomorrow and will work on getting the boost control and efan temp control circuits installed, all controlled by MS.

[Schnitzer318is]

Update: 01/02

Had been working on adding a boost control circuit to my megasquirt, but because it is a PnP unit built into the motronic box... I guess something else is using that input/output and causing a conflict. Since I couldn't get that to work I just threw a manual boost controller in. I now have a solid 10.5psi all the way to redline.

Also threw a new set of NGK spark plugs. Went with 1 degree colder plugs. Feels like it added a small amount of torque before boost, but that is probably just placebo.

I didn't realize it... because I've never felt this before, but my clutch can't handle all the torque after the turbo install. It has been slipping in 4th and 5th on the highway for quite some time and now that I have 10.5psi consistently I can't even gun it on the highway anymore.

So, my next course of action is a spec stage 2 clutch kit... good for 270tq which should be plenty.

With my new boost level I am estimating 215rwhp but I won't throw it on a dyno until I get a new clutch.

Will keep updating if anyone is still interested. I know everyone wants vids, but I'm trying to get everything ironed out so I can get some GOOD vids.

[White325is]

What flywheel are you running now?
Ever think of getting a LWFW?

[iamsam]

wee need LOTS of pics and vids man!!!