turbo m42?

[Rob]

the good honda guys have done great things.....12psi on a stock ITR (10.6:1) isnt unheard of, they boost S2000s all the time (11:1), etc etc. its all in the tuning.

I just dont htink its worth in on a 318, imho

[///M3Hopes]

8lbs on a B18B? Hmmmm, pushing it. That's like a Jackson Racing with a big pulley..... stressing a little bit. They don't have knock sensors. so get something wrong..... :evil:

I know you gots a B25, but I thought you were thinking about this as a project. That project would probably be a bust at 10psi.

Why not get a cheap M10, and boost it as much as you can. That'd be a stupid fast toy.
http://forums.bimmerforums.com/forum...d.php?t=195491

8 lbs pushing it? HA...look at this dyno graph:



Stock block LS, custom tubular manifold, t3/t4oe 57 trim .63a/r stage 3 turbine blade, spearco intercooler, custom IC piping, custom 2.5" dp, 3" thermal exhaust, 680cc injectors, Walboro 255lph pump, Hondata 2b.

Tuning at 16psi.

Mmmhmm.

[randomtask37]

mmmmm yes ^^^

[rwh11385]

:shock: Crazy hondas. I wonder why they don't blow up?

[randomtask37]

T U N I N G :P

[rwh11385]

Ah, i was running out the door to get to school on time, and was going to edit it to underline the important detail in that mods list:

Hondata 2b

Yeah, tuning. But hope you don't mess anything up exprimenting with your M42 turbo.

[///M3Hopes]

like I said..its all in tuning:)

[hotghias]

what's up with all these party poopers?

yes, it would be worth it to turbo a m42 if you already own the car, especially if you have other work done to it. it would be easier and cheaper than an engine swap, very different, and maintain the m3-like handling.

naturally aspirated = infinite turbo lag. don't even try that argument.

there are tons of turbo m20's out there. there's no reason a well-planned m42 wouldnt make over 200 horsepower. 140 +/- hp stock. atmospheric pressure is 14.7 psi. 7-8 psi on top of that should deliver *nearly* 70 more horsepower. if you tune it well you could definitely go higher.

here's some HIGH estimates of what you might pay if you do it cheap yourself-
manifold- make it with weld el's for 100 bucks tops, and that's if you cant just make an adapter plate
intercooler- junkyard item, 100 bucks for a starion, 50 bucks for a dsm intercooler. less if you tell them it's a heater core from a van.
turbo- t-25 out of an eclipse- 50 to 100 bucks. less if you throw it over the fence and pick it up later that night
charge piping and connections- 50 to 100 bucks for a few mandrel bends and silicone connectors, with clamps
oil lines, water lines (if you use them), guages, etc- 100 bucks

the only expensive or hard part would be fuel and spark management-
smt6- ??? dollars
injectors- 50 bucks or walk out of the junkyard with them in your socks
MAP sensor for smt6 to get rid of the damn afm- what, 30 bucks?

allow a few hundred for a new clutch or incedentals.

"bam!" -emeril

[hotghias]

oh yeah, i forgot:

first generation DSM blow off valve $10
you'll need a k&n style cone filter $20-50???

probably forgot a few other things, hopefully nothing big.

[Rob]

all that, and still get pulled on by a 3.0 or 3.2 coming out of oak tree at VIR......

[randomtask37]

i think the point is that u can make cheap power without gaining much weight. even if its not enough to blow the socks off everyone, itll be fun.

[M42Technik]

I'd love to do that. Maybe I'll get to it someday.

Does anyone have M42 turbo'd engine pictures? I recall a sick, SICK M42 engine a while back, can't find it again. I just remember giant pipes flowing all around it.

Someone should make a final list of all the parts needed as well...

[Rob]

weight is a whole different arguement.

btw my 318is wont blow anybody's socks off, but its still fun. i dont need to meddle with my reliability to achieve that....

[e9nine]

Someone should make a final list of all the parts needed as well...

The parts list is not the problem. Its the planning, planning, planning, tuning, tuning and tuning that's the most important thing to get sorted out. Planning and tuning is where its at.

[hotghias]

randomtask knows what i'm talking about here.

rob: well of course a turbo m42 would still likely get beat by a 3.0 or 3.2 liter engine swap, but not everybody has the desire, resources, money, or talent to do such a huge project and make it work. turbo 4 cylinder would be fun as hell. and again, it would weigh and handle better than a swapped car.

i don't understand your argument against undertaking the project at all.

the m42 is undoubtably a better candidate for a turbo than an m10, and the simplicity and economy with which you could pull it off makes it better than the m20, too (in my opinion).


by the way, a good grassroots turbo site (mostly honda, but great info, no rice) is www.homemadeturbo.com if anybody needs more info.