Boost with 10:1 compression?

[turbodan]

I've been thinking about how easy it would be to turbocharge the M60B40. Wouldn't take much to get plenty of power out of a four valve V8, but I don't really want to open the motor up. I'm getting lazy in my old age.

Anybody run any kind of boost on a 10:1 motor? Any input?

[T_C_D]

You can easily run 10psi at sea level with 93 octane. 12/13psi with careful tuning.

[turbodan]

Wow. Wouldn't even need that much to get into the high 300's.

Too easy...

[T_C_D]

Wow. Wouldn't even need that much to get into the high 300's.

Too easy...

Do it. I wanted to when I had my 540i but space is a bitch.

[turbodan]

Looks like a 3788R would work. Assuming 94% VE at 6k RPM it would be moving about 40lbs/min at 7 psi.

[turbodan]

I would have to do a rear mount system. I could cannibalize the spare tire well and stuff it all in there. Then its all plumbing.

[T_C_D]

I would have to do a rear mount system. I could cannibalize the spare tire well and stuff it all in there. Then its all plumbing.

That would make it easier.

[GI jonas]

I like this idea.Boost and high compression is the ultimate for street driving, power all the time.

What fuels are available to you? If setting up for e85 is not ridiculous ( you mentioned lazy) then that CR isn't remotely an issue, but I understand the ghey factor that particular fuel comes with as well.

Regardless do it Anyway, this would be one application where a rear mount would be acceptable IMO.

[winfred]

anybody know what the dinan supercharged 540s ran for boost? that outta give some idea what they are good for.
i always had a sick desire of putting a screwcharger in the V, maybe upside down with a spider looking intake and backwards with a jackshaft to get the intake on the front

[turbodan]

The superchargers seem to run about 6 psi, non intercooled. Pretty weak suckage for almost $6k. If I go for a brand new Garrett 3788R this whole thing would probably cost around $2200. I think stock injection would be fine here with a RRFPR. Rear mount would mean no compromise with A/C or packaging.

Pump gas is a concrete requirement. Sounds like a non issue though. I would absolutely not be boosting above 8 psi. I bet it hauls serious ass at 6. I've grown up enough to be happy with that.

Only real problem is going to be sneaking this past the wife.

[winfred]

that being dinan you probably have a 50% pussy/safety factor so 8-10 would probably be groovy, i've seen v8 blowers come up from time to time on ebay, a pulley swap and hello monster torque, 6# outta be nearly useless power in the lower gears

[T_C_D]

I bumped the boost on my Dinan 540i from 5psi to 8spi. It was stock other than a 3" exhaust. It made 354rwhp and less torque through an automatic.

[unt0uchable]

I've always had an eye for the remote mount systems. When I was 16 and sporting my first car,a 93 Talon (non tsi model this time) I was hanging out with a buddy and his cavalier club and one of the cav's had a remote mount up under the trunk. That was just insane to me. I dreamt of doing it on my 91 Golf, then my 85 GTI. Never had the scratch to do it. This will be interesting to see if you follow through! Good luck! I bet the 540iT will be quick.

[Hit Man X]

I had a butt-turbo (STS kit) on my 2001 5.3 Z71 truck. If you guys need some info on the harness, drop me a PM. Been a while since I have looked at the harness and install booklet, but it is pretty simple with a few relays to power up the scavenge oil system, the high/low for the pump, etc.

[turbodan]

I'm thinking about running a separate lube system for the turbo. Maybe two quart capacity with a small oil cooler and a little pump for circulation. Probably a bad idea but I have been known to go out of my way to avoid doing something correctly.

The e34 has the battery and fusebox under the rear seat. Easy access to switched power.

[Brad D.]

I've run a variety of ~10:1 engines here at work with pretty high BMEP and not had any issues. You should have no issues with careful timing and fueling.

[scarey013]

There's a few guys that are running boosted M6x. The one across the pond in the Volvo is putting out over 640HP, if I remember reading correctly.

There's also a couple guys on BF that are boosting them, or in the process.

I'm really curious about this too, because I'm at the point of diminishing returns, as well as the 'no turn back' stage of my swap. https://plus.google.com/photos/11608302 ... cP7zajtjAE

In reality, at least for me, a boosted M52 might be a better (and comparatively bolt-in) option. That isn't an option, for obvious reasons, for you.

Stick with it Dan, you can do it...

[T_C_D]

I'm really curious about this too, because I'm at the point of diminishing returns, as well as the 'no turn back' stage of my swap. https://plus.google.com/photos/11608302 ... cP7zajtjAE

Cool swap! Engine is huge for only 4.0L!

[iViLe]

http://server.pure-pf.com/phpBB/viewtop ... =2&t=74277

Few turbo 8's on ppf.

[red535t]

I would have to do a rear mount system. I could cannibalize the spare tire well and stuff it all in there. Then its all plumbing.

i/we had a similar idea a while back,which hasnt taken off
yet.plan was to fit a couple juckyard 2L turbo units(X2)
to keep the cost down.
the only problem i can foresee at present(other then $$ and time) is turbo sizing-being so far from the heat source.