S38B42 Up and Running Stroker - Page 2 - BMW M5 Forum and M6 Forums
E34 M5 Discussion 1988-1995 Sedan and Touring

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post #11 of 76 Old 15th December 2015, 12:59 AM
AseanAero
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David , the engine is going to ping like hell on pump gas with stock cams

DCR > 9:1

You're going to have to tune quite rich at high rpm or run water or water / methanol injection

Aquamist UK does some very nice systems
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Tony, Aussie expat in Jakarta Indonesia

1990 E34 M5 S38B36 GA25324
GA25324


1995 E34 540/5 Project

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post #12 of 76 Old 15th December 2015, 03:26 AM
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Quote:
See video of initial running ;
E34 M5 S38B42 Stroker:

http://youtu.be/xNfBPVQOpPg
The exhaust note has a real thump to it now , sounds mean



Tony, Aussie expat in Jakarta Indonesia

1990 E34 M5 S38B36 GA25324
GA25324


1995 E34 540/5 Project
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post #13 of 76 Old 15th December 2015, 10:25 PM
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post #14 of 76 Old 16th December 2015, 01:04 AM
mottati
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sounds nice. curious to see some numbers.

Mike

93 M5 3.8 Sterling Silver, Black 5/93 production (euro)
94 M5 Touring Madeira Schwarz, Black 10/93 production
84 728i - M88 powered

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post #15 of 76 Old 16th December 2015, 10:45 AM
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If this works out as awesome as we think it is I think Taffy will go for one also.

Is this the first S38 kit that PPF have sold ?



Tony, Aussie expat in Jakarta Indonesia

1990 E34 M5 S38B36 GA25324
GA25324


1995 E34 540/5 Project
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post #16 of 76 Old 16th December 2015, 11:14 AM
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Yes... I am very interested in this

It is said that if you line up all the cars in the world end to end, someone would be stupid enough to try and pass them.
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post #17 of 76 Old 16th December 2015, 11:17 AM
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David - forgive the noddy question but how will this be tuned. Standalone bespoke ECU ? Alpha N piggyback ?
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post #18 of 76 Old 16th December 2015, 02:17 PM
Eero H
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Quote:
Originally Posted by MattH View Post
David - forgive the noddy question but how will this be tuned. Standalone bespoke ECU ? Alpha N piggyback ?
Motronic remap?
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post #19 of 76 Old 17th December 2015, 12:25 PM Thread Starter
davidoli
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Apologies for delay in replying guys and gals , I unwisely edited my contact details and had to wait for admin approval before being able to post .

Meanwhile ,

Yes , this was one of the first run of 5 cranks produced and , as far as I know , one of the first to be up and running in an E34 M5 .

We were part of the guinea pig development of the kit and encountered issues such as pistons sitting 1.65mm above the deck when the spec was flush , rods that fouled the underside of the piston etc

All of these teething issues resulted in delays , but Thomas was quick to address issues and provide solutions and the resulting kit will now be plug and play .

We chose to fit Cat Cams of 291° hence the lumpy idle Bumbaclut picked up on .

That said , once the fuelling / mapping is optimised via the factory motronic I expect the engine to be a true powerhouse whilst retaining drivability .

I have driven the car for a number of miles on the standard map without a lambda or a maf and it still felt crisp , so, once it's mapped using a wide band lambda situated in the x piped stainless decatted system , I anticipate positive results .

A few pics ;
Attached Thumbnails
20150928_120840.jpg   20151012_162640.jpg   20151007_163428.jpg  

Better a day as a tiger than a lifetime as a sheep !

91 Sebring 3.6 | E28 UK RHD M5 | E34 UK RHD 3.8 | E34 M5 Touring | E24 M635CSi UK RHD

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post #20 of 76 Old 17th December 2015, 08:17 PM
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