M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Swaps, Turbos, Buildups => Topic started by: Appletree IS supercharged on October 25, 2008, 01:52:46 AM

Title: Using desiel big end and main shells?
Post by: Appletree IS supercharged on October 25, 2008, 01:52:46 AM

Hi, i was reading an old mag abit back that had a pug 306gti-6 with  a rotrex superchager on it that ran 400bhp, the guy had used big end and mains bearing shells from a deisel in the same engine range as the standard petrol ones wernt up to the job does any one know it it would be a good idea to use say m47 shells on a turbo/supercharged M42 build??

Or do we think thatthe standard ones would be ok?

Title: Using desiel big end and main shells?
Post by: ludiagsm on October 25, 2008, 04:31:41 AM

Quote from: Appletree IS supercharged;59442

Hi, i was reading an old mag abit back that had a pug 306gti-6 with  a rotrex superchager on it that ran 400bhp, the guy had used big end and mains bearing shells from a deisel in the same engine range as the standard petrol ones wernt up to the job does any one know it it would be a good idea to use say m47 shells on a turbo/supercharged M42 build??

Or do we think thatthe standard ones would be ok?

diesel bearings are stronger than normal and i use them in my engines. don't forget motor oil olnly motul 20w60 lioman

Title: Using desiel big end and main shells?
Post by: Appletree IS supercharged on October 25, 2008, 05:21:16 AM

Sorry What are you running again? will the desiel m47 shells fit the M42 crank with no mods in a standard m42 block?? if so then this seams like a good idea for not alot of expense. when you say about the oil do you mean thats the oil to use with them or just to use good quality oil? the pug guy was using somthing called purple racing oil supposuidly with a 400% stronger oil film than any other oil available.

Title: Using desiel big end and main shells?
Post by: e30guydownunder on October 26, 2008, 02:54:57 AM

one of the bmw diesel main shells is meant to use a 360 degree thrust bearing as well, this is preferable i think???

Title: Using desiel big end and main shells?
Post by: nuvolarossa on October 26, 2008, 03:09:11 AM

Quote from: ludiagsm;59445

don't forget motor oil olnly motul 20w60 lioman

That's Competition Oil! :D Is it this? I suppose that your "lioman" is lemans!:cool: So the correct name is this MOTUL 300V 20W60 LE MANS
(http://i17.ebayimg.com/05/i/000/f5/a9/b35c_1.JPG)
I seached lioman and there is nothing with that name:D

Title: Using desiel big end and main shells?
Post by: ludiagsm on October 26, 2008, 04:36:18 AM

Quote from: nuvolarossa;59504

That's Competition Oil! :D Is it this? I suppose that your "lioman" is lemans!:cool: So the correct name is this MOTUL 300V 20W60 LE MANS
(http://i17.ebayimg.com/05/i/000/f5/a9/b35c_1.JPG)
I seached lioman and there is nothing with that name:D

yes that is the oil ,sorry my eiglish :)

Title: Using desiel big end and main shells?
Post by: ludiagsm on October 26, 2008, 04:43:24 AM

Quote from: e30guydownunder;59503

one of the bmw diesel main shells is meant to use a 360 degree thrust bearing as well, this is preferable i think???

exactly for main bearings they have 360 degrees thrust bearing ,and rods bearings are stroger they has 3 komponent material and has notice sputter.

Title: Using desiel big end and main shells?
Post by: ose30 on October 26, 2008, 10:36:12 AM

Diesel bearings might be stronger, after all diesel's have a lot more torque compared to bensin/gas/petrol (what ever the right word is ) engines.

Title: Using desiel big end and main shells?
Post by: haledj on October 27, 2008, 06:17:21 PM

diesel engines also don't rev as high...

Title: Using desiel big end and main shells?
Post by: ludiagsm on October 28, 2008, 02:34:50 AM

Quote from: haledj;59586

diesel engines also don't rev as high...

in my turbo m42 i use disel bearings and i have more than 10 000 kilometers on 2,3 bar of boost and 8000++ rpm 9500 is max rpms who i so on the logs:)  http://uk.youtube.com/watch?v=STdEMQz8PIA&feature=related  

If you whant stronger engine diesel bearings are the answere.

Title: Using desiel big end and main shells?
Post by: E36Al on November 10, 2008, 04:43:34 AM

Did you have to notch out your bearing caps, like the mm ones?

Title: Using desiel big end and main shells?
Post by: ludiagsm on November 10, 2008, 06:08:22 PM

Quote from: E36Al;60329

Did you have to notch out your bearing caps, like the mm ones?

yes notch work only on rods if they don't have.