m30b28 rebuild and turbocharge

soldier322573 · Post by **soldier322573** » Feb 13, 2012 10:42 AM

Hi peeps i just aquired a 2.8 m30 motor i am looking to swap it in my e28 518i and rebuild and turbocharge it one time.

i would like to achieve anywere around 300+ hp but i also have a Nos and Water inj Kit from my previous car so i am gonna put those on my motor.

Any suggestions and info on how i should build the engine would be appreciated.

PS: we dont get the 3.5 motor here in Barbados we mostly have 2.8's so i gotta work with what i have

Mark 88/M5 Houston · Post by **Mark 88/M5 Houston** » Feb 13, 2012 1:22 PM

Research Turbo Charging Dynamics. http://www.turbochargingdynamics.com/

"TCD" , Todd, is a member here and knows as much about turbocharging BMW motors as anyone.

soldier322573 · Post by **soldier322573** » Feb 13, 2012 1:39 PM

Thanks will look into it

Xenocide · Post by **Xenocide** » Feb 14, 2012 8:59 AM

If you were going to do a full rebuild, it may be worth boring the block and swapping pistons to increase displacement. Of course that'll potentially add many more hundreds of USD to your budget.

Check here for a little more information, but Todd is likely going to be your best resource, as Mark said.

soldier322573 · Post by **soldier322573** » Feb 14, 2012 10:07 AM

i was doing some research and i see d 3.0 has 89mm pistons as apposed to the 86mm in the 2.8 so i will bore the block to fit the 3.0 pistons

BATESY · Post by **BATESY** » Feb 14, 2012 1:41 PM

Not 100% percent of this, but usually with BMW blocks there the same just different bore size, keeps cost down on making them all.

soldier322573 · Post by **soldier322573** » Feb 14, 2012 2:50 PM

From what i gathered the 2.8 and the 3.0 have the same stroke but different piston size.
That may mean same block same crank just different bore size.

BATESY · Post by **BATESY** » Feb 14, 2012 2:52 PM

correct.

Mark 88/M5 Houston · Post by **Mark 88/M5 Houston** » Feb 14, 2012 3:01 PM

If you are boosting the engine the 200 cc's aren't going to make a whole lot of difference. If you can hone and re-ring what you have...

Just thinking the dollars might be better spent on the boost hardware or engine management system.

soldier322573 · Post by **soldier322573** » Feb 14, 2012 3:23 PM

Fair enough i was just exploring my options

BATESY · Post by **BATESY** » Feb 14, 2012 6:01 PM

Probably take more boost on a low liter engine anyway.

soldier322573 · Post by **soldier322573** » Feb 14, 2012 6:32 PM

Noted thanks

marc79euro645 · Post by **marc79euro645** » Feb 14, 2012 8:30 PM

head gaskets like to pop right between the cylinder,that's why I did'nt want to turbo my original m90 w /like 92mm bore iirc. It was really thin between the holes.
marc

soldier322573 · Post by **soldier322573** » Feb 15, 2012 1:48 PM

Noted

soldier322573 · Post by **soldier322573** » Feb 21, 2012 2:43 PM

what is a good turbo to use on my application

T_C_D · Post by **T_C_D** » Feb 22, 2012 2:00 PM

soldier322573 wrote:what is a good turbo to use on my application

What manifold are you using?

soldier322573 · Post by **soldier322573** » Feb 22, 2012 3:29 PM

thinking a TCD manifold cause i am not really seeing manifolds online for the m30's i am only seeing for the m20 engines

T_C_D · Post by **T_C_D** » Feb 22, 2012 3:33 PM

soldier322573 wrote:thinking a TCD manifold cause i am not really seeing manifolds online for the m30's i am only seeing for the m20 engines

T04e, 60 trim compressor wheel, S4 turbine and .58 exh housing.

soldier322573 · Post by **soldier322573** » Feb 22, 2012 3:36 PM

i take it that this is the best turbo and trim to use

T_C_D · Post by **T_C_D** » Feb 22, 2012 3:40 PM

soldier322573 wrote:i take it that this is the best turbo and trim to use

It's the correct size for your engine and HP goals.

soldier322573 · Post by **soldier322573** » Feb 22, 2012 7:21 PM

Thanks alot. what size waste gate should i use on my application and what kind of blow off valve etc ?

T_C_D · Post by **T_C_D** » Feb 22, 2012 7:55 PM

soldier322573 wrote:Thanks alot. what size waste gate should i use on my application and what kind of blow off valve etc ?

Tial 38mm WG and 50mm BOV

soldier322573 · Post by **soldier322573** » Feb 22, 2012 8:57 PM

sounds great. And what about injector sizing?
i have also seen some head gaskets from mls i think it was but i am only seeing for the 3.0 and 3.5 can these work with my application and also would i have to use strengthened head bolts etc?

sorry for all the questions but i wanna be sure before i go and start ordering parts like crazy

T_C_D · Post by **T_C_D** » Feb 22, 2012 9:00 PM

soldier322573 wrote:sounds great. And what about injector sizing?
i have also seen some head gaskets from mls i think it was but i am only seeing for the 3.0 and 3.5 can these work with my application and also would i have to use strengthened head bolts etc?

sorry for all the questions but i wanna be sure before i go and start ordering parts like crazy

I can have Cometic make a gasket for the appropriate size for your engine.

soldier322573 · Post by **soldier322573** » Feb 22, 2012 9:04 PM

thats awesome thanks a million champ really appreciate that.
what would the price be including shipping?

T_C_D · Post by **T_C_D** » Feb 22, 2012 9:09 PM

soldier322573 wrote:thats awesome thanks a million champ really appreciate that.
what would the price be including shipping?

Send me an email and I'll quote you for everything you need.

tcd@turbochargingdynamics.com

Thanks,
Todd

soldier322573 · Post by **soldier322573** » Feb 23, 2012 7:11 PM

Thanks

Let the fun begin

soldier322573 · Post by **soldier322573** » Mar 01, 2012 6:01 AM

M30b28 test fitted in E30 over the weekend.
Unto the pull down and rebuild stage

soldier322573 · Post by **soldier322573** » Mar 18, 2012 9:28 AM

i test fitted the engine in position 3 but the oil pan is resting on the steering rack which isnt good so i changed the sump pan to the b35 pan to get more clearence but now i also have to change the oil pump pickup problem is we dont have any on island and i dont wanna use position 1

shocka · Post by **shocka** » Mar 22, 2012 2:23 AM

Maybe put a WTB ad in the for sale section im sure someone in the southern states has one. Lets see the car already

MyE28.com

MyE28.com

m30b28 rebuild and turbocharge

m30b28 rebuild and turbocharge

Oil Pan And Oil Pickup Problem