M30B35 Swap
Posted: Thu Mar 26, 2020 12:18 pm
Hi guys,
I am planning a M30B35 (´91 euro e32) swap in my M20 e12, and I have come across a few doubts as I am not familiar with M30s.
I understand that I sould use an e12 oil sump and pump. About the pump, should I use the B35 main body and a e12 pick up tube? I have read here and other forums about some oil pressure issues but was unclear. I have a 528I sump and pump for this aspects of the swap.
At the time I´m only cleaning and sourcing parts, and plan to refresh everything in this engine. But for a future stage, maybe next year if this coronavirus allow us, I plan to add a turbo system. In order to drop a few points the actual compression ratio (maybe form 9:1 to 8,6:1), I would like to use a thicker MLS head gasket. Can someone confirm the std head gasket thickness? Also, I searched the forum but didn´t find much info about turbos and would like to know of experiences with cylinder head bolts. This isn´t a race car, it´s a daily driver and will spend most of the time in the city under 3k rpm. Turbo pressure won´t be beyond 0.6 bar. Will the standard head bolts hold up fine? I was told from "experts" that intercooler wasn´t necessary for my goals, but I would like to be safe and keep intake temps as low as possible with a front mounted intercooler.
Other thing that I would like to know, is if I can use the e32 radiator. I only took a few measures and it seems it would fit. I know that you probably would recommend me to use the e12 radiator, but understand that I am in south america and it is a PITA to get parts. This radiator was included in the engine so I would save around 350 $ if I can use it.
Well, thats it for now. Will upload a few pics as soon as I can.
And sorry for so many questions in a strange english!!
Regards
Santiago
I am planning a M30B35 (´91 euro e32) swap in my M20 e12, and I have come across a few doubts as I am not familiar with M30s.
I understand that I sould use an e12 oil sump and pump. About the pump, should I use the B35 main body and a e12 pick up tube? I have read here and other forums about some oil pressure issues but was unclear. I have a 528I sump and pump for this aspects of the swap.
At the time I´m only cleaning and sourcing parts, and plan to refresh everything in this engine. But for a future stage, maybe next year if this coronavirus allow us, I plan to add a turbo system. In order to drop a few points the actual compression ratio (maybe form 9:1 to 8,6:1), I would like to use a thicker MLS head gasket. Can someone confirm the std head gasket thickness? Also, I searched the forum but didn´t find much info about turbos and would like to know of experiences with cylinder head bolts. This isn´t a race car, it´s a daily driver and will spend most of the time in the city under 3k rpm. Turbo pressure won´t be beyond 0.6 bar. Will the standard head bolts hold up fine? I was told from "experts" that intercooler wasn´t necessary for my goals, but I would like to be safe and keep intake temps as low as possible with a front mounted intercooler.
Other thing that I would like to know, is if I can use the e32 radiator. I only took a few measures and it seems it would fit. I know that you probably would recommend me to use the e12 radiator, but understand that I am in south america and it is a PITA to get parts. This radiator was included in the engine so I would save around 350 $ if I can use it.
Well, thats it for now. Will upload a few pics as soon as I can.
And sorry for so many questions in a strange english!!
Regards
Santiago