MyE28.com

Post by **Jelmer538i** » Jul 17, 2008 10:15 PM · Jul 17, 2008 10:15 PM

E28 M5 turbo

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Post by Jelmer538i » Jul 17, 2008 10:15 PM

This is my brothers E28 M5 turbo. Engine is a 745i shortblock with JE forged pistons, balancend and lighter crankshaft, rods and flywheel. Displacement is now 3.7l. On top of that is a 3.6 M5 head that is bin ported and polished. Between those parts is a headgasket from our friends of TCD. Turbo is a upgraded 745i turbo, again from TCD. Behind all this is a 6 speed M5 gearbox mounted with a bigger clutch. A 745i LSD is going to try to keep the wheels from spinning. Brakes up front are 330mm discs and 4 piston calipers from a B10 Biturbo. In the rear are a set of vented 300mm E34 M5 discs and calipers at work. Suspension is not finished yet.

Post by **PMcD** » Jul 17, 2008 10:21 PM · Jul 17, 2008 10:21 PM

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Post by PMcD » Jul 17, 2008 10:21 PM

WOW!

Post by **Shawn D.** » Jul 17, 2008 10:24 PM · Jul 17, 2008 10:24 PM

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Post by Shawn D. » Jul 17, 2008 10:24 PM

Neat! Interesting solution for the oil drain due to the head/block mismatch.

Post by **Duke** » Jul 17, 2008 10:27 PM · Jul 17, 2008 10:27 PM

Re: E28 M5 turbo

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Post by Duke » Jul 17, 2008 10:27 PM

Jelmer538i wrote:Turbo is a upgraded 745i turbo,

GREAT work thus far.

You will find that the 745i turbo will be way too small for this application. Just ask Ken H.

Post by **Kyle in NO** » Jul 17, 2008 10:35 PM · Jul 17, 2008 10:35 PM

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Post by Kyle in NO » Jul 17, 2008 10:35 PM

Nice!!! Also interested as to why you would use the 745i turbo instead of something more modern...

Post by **Jelmer538i** » Jul 17, 2008 10:53 PM · Jul 17, 2008 10:53 PM

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Post by Jelmer538i » Jul 17, 2008 10:53 PM

Kyle in NO wrote:Nice!!! Also interested as to why you would use the 745i turbo instead of something more modern...

Its the upgraded 745i turbo from TCD.

Post by **DaRedRocket** » Jul 17, 2008 11:07 PM · Jul 17, 2008 11:07 PM

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Post by DaRedRocket » Jul 17, 2008 11:07 PM

Simply beautiful. Great work.

I'd like to know more about what mods had to be done to the head/block to fit the mismatched pair together.

Post by **Kyle in NO** » Jul 17, 2008 11:16 PM · Jul 17, 2008 11:16 PM

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Post by Kyle in NO » Jul 17, 2008 11:16 PM

Jelmer538i wrote:
Kyle in NO wrote:Nice!!! Also interested as to why you would use the 745i turbo instead of something more modern...
Its the upgraded 745i turbo from TCD.

I understand that, but the turbo sold with the normal TCD M30 kits is the T4, which is larger. And that is on the lowly M30, which doesn't have near the airflow potential of the S38...

Post by **ElGuappo** » Jul 17, 2008 11:25 PM · Jul 17, 2008 11:25 PM

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Post by ElGuappo » Jul 17, 2008 11:25 PM

You Dutch boys is crazy...The BEST kind of crazy...

Love it. That is some nice work.

Jay3

Post by **DaRedRocket** » Jul 17, 2008 11:27 PM · Jul 17, 2008 11:27 PM

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Post by DaRedRocket » Jul 17, 2008 11:27 PM

Kyle in NO wrote:And that is on the lowly M30, which doesn't have near the airflow potential of the S38...

He's not using an S38. It is only the head. I know what you mean though...the limiting factor of the M106/M30 is certainly the head and the S38 head surely helps that flow problem therefore using a 745i turbo seems kind of like a downgrade rather than an upgrade.

Post by **landspeed** » Jul 17, 2008 11:29 PM · Jul 17, 2008 11:29 PM

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Post by landspeed » Jul 17, 2008 11:29 PM

Considering the budget of a project like this, I would recommend a turbo along the lines of a GT35R or GT40. You're not going to get far with that K27, even upgraded.

Post by **Brad D.** » Jul 17, 2008 11:49 PM · Jul 17, 2008 11:49 PM

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Post by Brad D. » Jul 17, 2008 11:49 PM

Awesome buildup. Very nice work. That K27 like others have mentioned is seriously going to be a limiting factor (at least it has been upgraded). I'm with landspeed in that you really need a serious turbo to finish it off. A GT40 would be tits.

Post by **misha** » Jul 18, 2008 12:21 AM · Jul 18, 2008 12:21 AM

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Post by misha » Jul 18, 2008 12:21 AM

god damn...

that looks and sounds like a hell of any engine setup.

what are the internal specs as far as CR and how did you get the head to match?

I'm just a little stunned. Any goals as far as power goes?

Post by **Duke** » Jul 18, 2008 9:47 AM · Jul 18, 2008 9:47 AM

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Post by Duke » Jul 18, 2008 9:47 AM

1985bmw535i wrote: He's not using an S38. It is only the head.

What makes a S38 different from the M30 is the head. The short block for the M30/M106/M88 and S38 are virtually identical. The M106 will have oil jets and the others will not.

He is going to find that with that turbo he will have bad turbo boost bleed-off. The turbo will not be able to maintain anything over 5 psi at upper RPM. TCD should have known better than sell him a K27 for a 3.7L S38.

Again…just ask Ken H.

Jelmer538i wrote:
Kyle in NO wrote:interested as to why you would use the 745i turbo instead of something more modern...
Its the upgraded 745i turbo from TCD.

So................you need a refund.

Post by **Jelmer538i** » Jul 18, 2008 11:02 PM · Jul 18, 2008 11:02 PM

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Post by Jelmer538i » Jul 18, 2008 11:02 PM

W'll see what happens. Iff TCD knows about the turbo, and he knows my brother is using a 3.7 M5, than can get it back offcourse! The engine is going to run with a DTA motormanagment system and that will be set on the Dyno. My brothers goal is 600-650hp but if the turbo is not good for this aplication he's going for a diffrent turbo.
I keep posting info and pics.

Post by **blkbmw** » Jul 19, 2008 12:19 AM · Jul 19, 2008 12:19 AM

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Post by blkbmw » Jul 19, 2008 12:19 AM

wow...........that's nice

Post by **bimmerboy** » Jul 19, 2008 11:20 AM · Jul 19, 2008 11:20 AM

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Post by bimmerboy » Jul 19, 2008 11:20 AM

Jelmer538i wrote:W'll see what happens. Iff TCD knows about the turbo, and he knows my brother is using a 3.7 M5, than can get it back offcourse! The engine is going to run with a DTA motormanagment system and that will be set on the Dyno. My brothers goal is 600-650hp but if the turbo is not good for this aplication he's going for a diffrent turbo.
I keep posting info and pics.

600-650 is asking way too much from a k27. I'd be pissed when I found out I have to change the flange on an absolutely beautiful manifold.

Post by **alijonny** » Jul 19, 2008 1:25 PM · Jul 19, 2008 1:25 PM

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Post by alijonny » Jul 19, 2008 1:25 PM

where will the radiator go??? lol looks awesome!

Post by **George** » Jul 19, 2008 2:55 PM · Jul 19, 2008 2:55 PM

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Post by George » Jul 19, 2008 2:55 PM

1985bmw535i wrote:Simply beautiful. Great work.

I'd like to know more about what mods had to be done to the head/block to fit the mismatched pair together.

+1

Post by **Rich Euro M5** » Jul 19, 2008 3:16 PM · Jul 19, 2008 3:16 PM

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Post by Rich Euro M5 » Jul 19, 2008 3:16 PM

Duke wrote: What makes a S38 different from the M30 is the head. The short block for the M30/M106/M88 and S38 are virtually identical.

Not quite identical. The difference is easy to see by looking at the oil return line coming off the bottom of the head.

On the S38 block there is a mounting boss just below the right rear side of the head. A short oil return line runs from the underside of the head to the block.

So as you can see it's possible to install the S38 head on the M30 block.

Rich

Post by **Jelmer538i** » Jul 19, 2008 6:58 PM · Jul 19, 2008 6:58 PM

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Post by Jelmer538i » Jul 19, 2008 6:58 PM

Yes, and he used the sprocket and chain of a S38 too. The lower sprocket of the S38 fitts on the M30 crankshaft.

Post by **Ken H.** » Jul 19, 2008 7:19 PM · Jul 19, 2008 7:19 PM

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Post by Ken H. » Jul 19, 2008 7:19 PM

Question:

alijonny wrote:where will the radiator go???

Answer: It will replace the picnic table currently mounted above the trunk lid.

Post by **T_C_D** » Jul 20, 2008 3:17 PM · Jul 20, 2008 3:17 PM

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Post by T_C_D » Jul 20, 2008 3:17 PM

Jelmer538i wrote:W'll see what happens. Iff TCD knows about the turbo, and he knows my brother is using a 3.7 M5, than can get it back offcourse! The engine is going to run with a DTA motormanagment system and that will be set on the Dyno. My brothers goal is 600-650hp but if the turbo is not good for this aplication he's going for a diffrent turbo.
I keep posting info and pics.

The turbine and exh housing will likely support the 600hp but the 60 trim comp wheel is a little too small. It'll be happy at 8/9psi and 450-500HP but beyond that a GT3582R wheel would be a better choice.

MB

Post by **Jelmer538i** » Jul 20, 2008 4:26 PM · Jul 20, 2008 4:26 PM

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Post by Jelmer538i » Jul 20, 2008 4:26 PM

Ken H. wrote:Question:
alijonny wrote:where will the radiator go???
Answer: It will replace the picnic table currently mounted above the trunk lid.

Its not a Honda! The outside will be stock exept for the 17" BBS wheels.

Post by **downforce22** » Apr 27, 2016 3:07 PM · Apr 27, 2016 3:07 PM

Re: E28 M5 turbo

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Post by downforce22 » Apr 27, 2016 3:07 PM

Interesting thread. Was curious as to whether the s38 head would fit. Unfortunately the pictures are down.

I wonder if the rotating assembly needs to be changed to make it work? i assume it would not but have not checked the stack height between an m30 and an s38 engine.

Also can the single chain be used or must you upgrade to a double chain?

EDIT: Looks like it is possible:
http://www.m5board.com/vbulletin/e34-m5 ... fit-2.html