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Old 12-15-2006, 10:49 PM   #1
Hartge H26
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3.5 turbo(745i) or s50---- calling striker

plain and simple. which one.........turbo runs at low psi and can easier be bumped to 11-13psi on 94 octane. s50 would take some coin to get to the same level.

I could get a 745i motor,wiring,computers,all plumbing and acc's,etc for 900 cdn

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Old 12-15-2006, 10:54 PM   #2
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I'd go the M30 way, it's a got a built bottom end for boost. You can probably make 400+ whp with a proper setup and tune on the M30 for the same coin you'd spend on the S50 swap
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Old 12-15-2006, 10:59 PM   #3
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I agree with AXXE
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Old 12-16-2006, 01:18 PM   #4
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1. Go read the horror stories about FI in the FI section
2. Get a NA S50 in there.
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Old 12-16-2006, 03:13 PM   #5
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go m30 for you will get way more for your money IMO. plus m30's are indestructable.
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Old 12-16-2006, 03:14 PM   #6
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Quote:
Originally Posted by Miguel
1. Go read the horror stories about FI in the FI section
2. Get a NA S50 in there.

Lol, misinformation is a bitch, isn't it. A properly tuned FI motor is just as reliable s a tweaked NA motor. Besides, the M30 isn't made of butter, it's the most solid motor BMW ever made, especially in E32 745i guise.


Besides, an S50 swap is what, 5 grand? For a stock S50. M30 swap is cheaper because of the motor cost, however custom motor mounts are needed, which isn't that big of a deal. Even if the swaps cost you the EXACT same, you are starting off with 300 hp vs 240 hp.
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Last edited by Axxe; 12-16-2006 at 03:17 PM.
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Old 12-16-2006, 04:24 PM   #7
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The mounts aren't an issue. my buddy has a Hartge H35 with the 3.5 in it so we can coy the mounts.
You are right. A propoer s50 swap and the end of the day done properly is close to 5g's.

The M30 transplant would be quite a bit cheaper, plus if the motor is missing an little items I have a complete 3.5 sitting in my garage.
And I would be furthur ahead with the M30 vs the S50 after the base install.
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Old 12-16-2006, 05:18 PM   #8
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Yup, and the approx. 2.5 grand difference you could spend on larger turbo, injectors, intercooler and tuning.
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Old 12-16-2006, 05:29 PM   #9
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Quote:
Originally Posted by Hartge H26
A propoer s50 swap and the end of the day done properly is close to 5g's.

The M30 transplant would be quite a bit cheaper, plus if the motor is missing an little items I have a complete 3.5 sitting in my garage.
And I would be furthur ahead with the M30 vs the S50 after the base install.
I think you have settled your own debate. Plus m30 swaps are more rare than s50 swaps and look more in place sitting in the e30 engine bay than even the m20 did? Plus Axxe made an excellent point with the money saved from the engine you can piece your turbo together.

m30 turbo would be awesome. I know my cousin did the swap you want to do in his e30 using the turbo set up from a 745 and he said it was a lot of fun. Unfortunately he ended up wraping it around a tree so he didn't get to drive it that much and I never got a chance to either.
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Old 12-17-2006, 01:25 PM   #10
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I'd spend money completely rebuilding the M30 first, rather than upgrading a thing.
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Old 12-17-2006, 01:28 PM   #11
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Quote:
Originally Posted by Mystikal
I'd spend money completely rebuilding the M30 first, rather than upgrading a thing.

Why? It's a bulletproof motor, only Mustafa (Kassab) can destroy them
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Old 12-17-2006, 01:41 PM   #12
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It's still over 20 years old. I'd go nuts on the rebuild.
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Old 12-17-2006, 01:48 PM   #13
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The cost of the M30 escalates at that point. I dunno, I'd just leave it, and if it goes boom, find another block and build it up.
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Old 12-17-2006, 11:39 PM   #14
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FYI...the motor in a 745i is either an M102 (3.2l) engine with L-jet (found in '82 E23's) and the later motors are M106(3.4l)/Motronic setup-- far more tweakable.
Also, be sure the transmission is in top shape, these things are famous for killing clutch packs if revved in neutral.

There are some guys boosting M30's, especially in the US. TCD (Turbo Charging Dynamics... www.turbochargingdynamics.com ) has several kits for M30's.

Found this on the E12 board...
"We did the conversion on an e28 but instead of using the 745 block we just took all the turbo bits off the engine and bolted them to a 3.5 M30 block. Running 8psi. Cost $750 for the bits and $500 for seals, lines, I/C, oil cooler.
Used an I/C from a SAAB, oil cooler from a Mazda RX-7. Just need to modify the turbo down pipe, modify the passenger side motor mount and make a turbo oil return to the block. An e12 will be easier than an e28 as you don't have to relocate the ABS for the I/C and I don't think the down pipe will interfere with the suspension at all. "

On another thread I found this...
"Just finishing it up on an 1985 e28. Took all the turbo pieces from a 1982 745i and put it on a rebuilt M30 low compression motor. Main challenges are clearance for the turbo/wastegate on the passenger side as well as modifying the downpipe from the wastegate to clear the suspension mounting point. If you use a non-turbo head you need to drill out the threads for the exhaust manifold or get long studs which will fit the stock holes. Other things are:
Drilling the block for the oil return, installing a oxygen sensor, relocating the ABS pump (if you have one), installing an M5 clutch."


More info can be found here.... http://bmwturbos.scottiesharpe.com/default.asp

Remember one thing...rebuilding (highly recommended for durability) one of these 745i motors will cost you some good coin as it is a 'Euro' motor which = $$$.

As pointed out earlier, you can take the Turbo bits and plant them onto an M30 (rebuild recommended). If you want boost, I'd go this way as M30 engine bits are less expensive compared to the M102 and M106 Euro bits if something were to go wrong down the road.
However the advantage of using the M102 or M106 engine is that these motors were meant for Turbo's and engineered to accept the pressure BMW regulated for extended engine life.
You know how it goes...modify/adjust the Turbo pressure etc...= less engine life, but more satisfaction in the short term


Hope this helps you make your decision!

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Old 12-17-2006, 11:45 PM   #15
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Good info Maluco, but also remember that M30's are quite stout. A thicker head gasket, and ARP head studs will allow the motor to handle quite a bit more boost . M30's are pretty cheap now anyway, so I'd go with one of those, no real worries, have a spare on the side incase you throw a rod (highly unlikely).
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