M20 B20 tuning potencial...

Need technical Q/A then you're in the right place

Moderator: martauto

Post Reply
User avatar
Eddy
E30 Zone Newbie
E30 Zone Newbie
Posts: 98
Joined: Sun Oct 23, 2005 11:00 pm

Tue Dec 13, 2005 12:52 am

OK guys some stuff I need to know...and before U go and tell me that this project is no go,and I should go and buy M20 B25 engine I should tell U that I got this engine almost for free,and its in perfect condition with low milleage...

so I whold like to know :

throtlle body swaps(the original looks kind of small to me...): whitch throtlle body is swapable to this engine..? maybe even a M30 unit?

have done a complete exaust change,except the headers..(didn`t have the time to make them..) but that`s all for now...

my wish is a more responsive engine,that has a little bit of that 2,5 grunt to spin those rims for some daily drifting to keep me happy this winter...

any hope to get that from this sixpot?
Building my ultimate drift E30....
M5pilot
E30 Zone Addict
E30 Zone Addict
Posts: 4968
Joined: Sun Jan 30, 2005 11:00 pm
Location: Luton
Contact:

Tue Dec 13, 2005 1:06 am

Build a 2.7 out of it.
jay528ise1985
E30 Zone Newbie
E30 Zone Newbie
Posts: 101
Joined: Sun Feb 06, 2005 11:00 pm
Location: Colchester, Essex

Thu Dec 15, 2005 5:06 pm

Try swapping the 320 air flow meter and throttle body for 325 items, they both have a larger bore than the 320 parts. Stick with the stock air filter and housing.

You can ask Ant (E30 tuning guru on this forum!) to do you a chip to suit the mod's you have done - Almost 150 bhp is attainable from this engine without mad modification or expense.

ps. You have gone for a slightly larger bore exhaust system than the standard 320 item haven't you?
1989 BMW 320i 2.7 2 door saloon
User avatar
Eddy
E30 Zone Newbie
E30 Zone Newbie
Posts: 98
Joined: Sun Oct 23, 2005 11:00 pm

Thu Dec 15, 2005 10:33 pm

Yea,the diameter is 55mm from the headers to the end :) ...

hmmm chip? how much whold it cost me to get it? 8O
325i throtlle body seems logical,but the airflow meter from the Motronic driven B25 engine is not exchangeble with my LE-Jetronic engine,or am I wrong?
Building my ultimate drift E30....
m-dtech
Unapproved Trader caution
Posts: 2068
Joined: Thu Sep 01, 2005 11:00 pm

Thu Dec 15, 2005 11:38 pm

NOS :)
Simon13
The longest resto in the world !
Posts: 22697
Joined: Mon Jan 10, 2005 11:00 pm
Location: Camberley, Surrey don't u know

Fri Dec 16, 2005 12:00 am

another choice is to use a complete M20 2.7 eta bottom end, it's bolt out and in conversion so i believe. Plus your throttle body mod and u will have a car that will see off a 325 mate
User avatar
Eddy
E30 Zone Newbie
E30 Zone Newbie
Posts: 98
Joined: Sun Oct 23, 2005 11:00 pm

Fri Dec 16, 2005 12:38 am

Have gave some thought about 2,7 Eta project.....but the problem is here in Slovenia,there just isn`t lot`s of these cars around,so it makes the whole project a lot more expencive....

NOS is out of the question....to much complications....

Don`t get me wrong: I don`t want 200bhp from this engine(have my driftcar for extreme tuning), just want some more response from that lazy 2,0 sixpot....

150Bhp whold be great,better fuel economy and decent performance :cool:
Building my ultimate drift E30....
kam-325i
E30 Zone Team Member
E30 Zone Team Member
Posts: 4851
Joined: Tue Sep 27, 2005 11:00 pm
Location: TELFORD !!!! (Shropshire) Stevetigger Land !!!
Contact:

Fri Dec 16, 2005 12:40 am

Getting 12-13% more BHP out of the B20 engine can be expensive.
Pete don't care about colour, He would shag a rainbow if he could find the end of it....
Image
User avatar
Eddy
E30 Zone Newbie
E30 Zone Newbie
Posts: 98
Joined: Sun Oct 23, 2005 11:00 pm

Fri Dec 16, 2005 12:47 am

the exhaust alone gave it so much torqe....next thing will be for sure to get me is gona be the throtlle body from B25,than maybe some weight reduction on inertia parts of the engine...pulley changing and electric fan coversion...

hopeully that`s gona be that :)
Building my ultimate drift E30....
Post Reply