this has come up as my m30 is coming to the end of its life span.
( thousands of miles of total disregard for detonation & blow by )
i'd be hard pressed at getting another m30 being that there limitations are about 5500 rpm.
not to mention that the word SOHC is usually associated with tercels and stanzas.
which would be a better choice for a replacement?
hi torque SOHC m30?
hi revving , DOHC m50 ( or at that s52 )?
poll: m30 vs m50, forced inductionly wise
Blown engine at VIR last weekend...no racing.
How about a Chevy create motor?
If you go for the new LS7 engine you won't have to worry about most (no all) of what's behind you...
I hear TCD is building a kit for the install...
Whenever I do engine assembly a piece of clay in the piston and trotate the engine (with an old head gasket installed) will give me a good idea of the valve to piston clearance before its too late.
The good think about small block chevy engines is that if they blow up (rarely do) you can have them out of the car, apart and on the bench so fast the bare block will still be warm - ask me how I know -:)
LS7 would be the icing on the cake....
however i've the end result of the drivers side in the engine bay, not pretty.
not to mention i'm not to crazy about the muscle car sound. wouldn't trade the inline-6-under-boost sound for v8.
i was just thinking that would flow more than a m30.
s38 would be ideal , but being soo difficult and expensive to source, is why i was leaning more towards m50/s52. I dont think the swap would be a difficult mission. Looks like its just remove and replace.
I think with megasquirt (thicker head gasket) and 15 psi would be a real screamer.
however i've the end result of the drivers side in the engine bay, not pretty.
not to mention i'm not to crazy about the muscle car sound. wouldn't trade the inline-6-under-boost sound for v8.
i was just thinking that would flow more than a m30.
s38 would be ideal , but being soo difficult and expensive to source, is why i was leaning more towards m50/s52. I dont think the swap would be a difficult mission. Looks like its just remove and replace.
I think with megasquirt (thicker head gasket) and 15 psi would be a real screamer.
Im not a big fan of non-BMW iron in a BMW, but each to his own.papajetta wrote:LS7 would be the icing on the cake....
however i've the end result of the drivers side in the engine bay, not pretty.
not to mention i'm not to crazy about the muscle car sound. wouldn't trade the inline-6-under-boost sound for v8.
i was just thinking that would flow more than a m30.
s38 would be ideal , but being soo difficult and expensive to source, is why i was leaning more towards m50/s52. I dont think the swap would be a difficult mission. Looks like its just remove and replace.
I think with megasquirt (thicker head gasket) and 15 psi would be a real screamer.
If you do go M50/52, the install will be more complex than you may think. The 413 ECU is highly complicated by 059 standards and is OBD-1. You will need all the smog equipment that came on a ///M3 to go with it also. To be quite honest I don't know all thats involved there, but it's not impossible. This would depend on your area's smog laws now and in the next couple of years as many more states are adopting the more stringent CA model.
That leads into the choice also if to go OBD-1 or OBD-2? Most at the BF.C like the OBD-1 better as its more tuner freindly. If your going aftermarket, then thats not an issue.
Also, will the M50/52 bolt up to the E28 tranny?. Fabing mounts will be interesting. Although I guess it's no harder than the american iron swap.
RussC
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Tammer in Philly
- Posts: 10719
- Joined: Feb 12, 2006 12:00 PM
- Location: CHI, IL
No, it's an S54. The bi-turbo motor is coming in the 335i, and will make less power in stock form than the S54. Once the E90 M3 sporting a ~400 hp V8 comes out, you can bet BMW will take the chains off the turbo and bump it up to 330-345 hp. And S54s have already been put in other cars. The cost is significantly higher than an M50/S50, and boosting would mean backing off from the 8k rpm redline. That motor is so stressed in stock form that force-feeding it would not be healthy without a reduction in compression and max speed.jimbixjr wrote:wait for the new z4 m roadster engine to come out. It's direct port twin turbo inline-6. Turn up the boost and away you go. I bet youd be the first to put it into something other than an original car.
-tammer
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Tammer in Philly
- Posts: 10719
- Joined: Feb 12, 2006 12:00 PM
- Location: CHI, IL
I agree, both the S54 and the new bi-turbo are sweet. And I think the bi-turbo will be a tuner's dream motor. 400 hp at the crank can't be far away; I doubt they're coming from the factory even close to their operational limits.jimbixjr wrote:My bad. I musta been thinking about a different car. But it is still a cool engine.
-tammer
Right, thats the beauty of a factory turbo system, just like any of the other cars, like 1.8/2.0turbo, Supra, RX7, DSMs etc.Tammer in Philly wrote:I agree, both the S54 and the new bi-turbo are sweet. And I think the bi-turbo will be a tuner's dream motor. 400 hp at the crank can't be far away; I doubt they're coming from the factory even close to their operational limits.jimbixjr wrote:My bad. I musta been thinking about a different car. But it is still a cool engine.
-tammer
RussC