Convert 2.0L to 2.5L

[tyke]

hi there lionelbrad here...was reading ur query on transplanting a b25 block to ur b20 engine!guess wht?it can be done and it doesnt really affect ur head.just gotta make sure tht ur overall condition of ur head was in good nick prior to tht!i hav mates who did it and untill now still smooth sailing!putting in the b25 block to ur b20 head will give u a great difference in performance!my friend is using the b25 block to his b20 head and maintaning his stock 2.0 gear box!the ratio is closer thus giving u a better responce!bear in mind tht with the set up i mentioned,u will hafta constantly check the condition of ur longshaft,prop shaft and of course ur clutch!its better then getting a b23 block!all this is if ur on a lower budget(RM2200 plus instalation & replacement parts),but if ur on a higher budget...then do try the b23 engine tht albundy suggested!well i just saved ur mobile number so expect an sms from me soon!for parts and advice on wht to change call mr.siew at munich auto in jalan segambut!i will sms u his number!-u take care and decide wisely-brad-guys:where to get shrick cams and a performance chip ah?

 

[3er]

Originally posted by Lionel_Koh@Dec 22 2004, 01:50 AM Just spoke to 535 that we can upgrade the 2.0 engine to 2.5cc without changing the whole engine. The engine no. still maintaince n road tax still is the same.Any good workshop to recommend instead ot Yap at Bdr Tun Razak which mention by 535.Cost around 2K. BTW just find out that 535 is my "JIRAN", nice to meet u n ur car is very nice .......
You do mean 2000cc to 2500cc, right?2.0cc and 2.5cc is less than a lawnmower motor.

 

[535i]

MrHartge,My objective ???? My objective to use 3.5 .. got that already. Just giving some hint to 'my friend' who might want to give a bit of a push to his trusty Hard Gay 323i ...Tak dapat potong, curi angin pun jadilah ...

 

[Zoggee]

do this la..do that la...No use wan!!! meet up somewhere la..go look at some who already done it.then dicide lor.

 

[Lionel_Koh]

think to convert for better power and touque....and the same time to get better FC. Although now my FC is around RM0.16-0.17 for mixed drive...However if can improved the performance n at the same time can get the better FC......sound very good....

 

[teejay]

zam,please check the wirings on the AFM and get back to me, some AFM may require advance electrical signals, but check it out and query exact number of wires and where they will be used, also check if your oxygen sensors are ok, and how many wires they have, 2, 3 or 4, as i need to check out exact wires or else it will blow your meter......else, it would take me about 1 hour which comes to about RM$250 for a professional install.......hehehelionel,once again, you need to be really sure what you want, if FC is your goal, you can stilll get that with your current setup, just a little bit tweaking , but if you wanna upgrade your engine to a bigger cc and get lower FC then your current ride............well....if you do, or if anyone is able todo that, i wanna learn too...........

 

[mrhartge]

Originally posted by teejay@Dec 23 2004, 06:40 AM zam,please check the wirings on the AFM and get back to me, some AFM may require advance electrical signals, but check it out and query exact number of wires and where they will be used, also check if your oxygen sensors are ok, and how many wires they have, 2, 3 or 4, as i need to check out exact wires or else it will blow your meter......else, it would take me about 1 hour which comes to about RM$250 for a professional install.......hehehelionel,once again, you need to be really sure what you want, if FC is your goal, you can stilll get that with your current setup, just a little bit tweaking , but if you wanna upgrade your engine to a bigger cc and get lower FC then your current ride............well....if you do, or if anyone is able todo that, i wanna learn too...........
yaaa lar... bigger CC = lower FC? tell me also lar the secret.... :blink: :blink: :blink:

 

[Lionel_Koh]

I get the infor from old forum,according to them,the 520 12V is underpowern the FC is not so impressive compare to 525 wit have more touque n power.....

 

[ALBundy]

Improved FC?? Its all a question of relativity. Not too sure bout M20 engines, but for M50s, the FC for a 2.0 and 2.5 is pretty similar. With a bigger engine, you dont need to press your gas pedal that much to get the car moving so in terms of FC versus CC (cubic capacity), yes you are getting better FC, relatively speaking.Back to basics, to improve FC, you need to improve engine efficiency or lighten the damn car and engine. By the way, petrol engine efficiency is less than 40%, the rest turns into heat (partly due to internal resistance also). If you can improve it to say 60%, you may win the noble prize for engineering kekekeke.

 

[pussy]

for the record, i'll speak once.. opps..if you want to upgrade, do it proper.. not half here or there..many posibilities... it's what you want and how deep your wallet is..i spent 17k on my conversion on my whole car.. that's alot.. but still can't beat a black 520i..regards.

 

[535i]

That 'Black 520i' is running of AC 17" right ?See... see ... somemore want to 'hide' the hantu under the bonnet...I will release my throttle when I see this 'Black 520i' .... Ehhh .. anybody we know or not ?? h34r:

 

[ALBundy]

U punya keleta sudah manyak laju ma...apa macam mau kejar, ade Alpina chip lagi....ATTENTION Anyone see this car, better slow down and give way! :lol: :lol:

 

[535i]

Where got ??? 16 yrs old car ... Body pun sudah mau roboh ... The only thing that makes the engine shine is the Carbon Fiber thing bought fr Pussy. Itu mau bagi sikit glow to the engine aje ... For show ony ...I will paste '518i) kat rear bonnet ... so that itu 'Black 520i' tak cucuk sama saya ....

 

[Lionel_Koh]

Albundy, haven't get ur reply for ur M20B23, if i'm not wrong, i PM to u asking for the price..........when will get back to me???????

 

[Lionel_Koh]

Back to the topic.....spoke to few mech....some claimed it can be done and just rebore the block to fix the piston and transfer B25 parts to B20 block and use B25 head.....But some mech said it can't cos the stroke is different......So just thinking to bring it backfor dicussion....

 

[skar19]

you would be better off getting the whole b25 engine, otherwise you would need the b25 block, rods, crank, injectors, intake manifold, throttle body, ecu, afm, wiring, exhaust manifold....am i missing anything.

it would also cost a fair bit to open up the engine and fix all the parts, you might as well get a b25 complete engine and do a complete overhaul so that you dont have to worry about your engine giving you trouble.

 

[bmwky]

Originally posted by Lionel_Koh@Sep 27 2005, 03:19 AM
Back to the topic.....spoke to few mech....some claimed it can be done and just rebore the block to fix the piston and transfer B25 parts to B20 block and use B25 head.....But some mech said it can't cos the stroke is different......So just thinking to bring it backfor dicussion....

forget the whole thing man.....you dun have the time to be constantly scratching your head if something goes wrong and you are bugged by niggling nity gritty imperfections.

 

[flash]

Some of you guys may know that I am also looking at the option for more power at a price that I can afford. My holy grail is to get a M50B25 halfcut and transplant all the good parts over.... but that is currently out of the reach of my pocket. :beaten: So I might have to settle for somewhere in between.

My mech has advised me, if I really want to go 2.5L, I should do it right and get a 2.5L engine. With my style of driving, he would not recommend me to bore out and stroke my 2.0L engine (M50) to 2.5L. It might not be reliable and might not tahan my trashing. The most he might go with my 2.0L engine is to bore it to between 2.1 to 2.2L. Not enough.

So I am still waiting for durian runtuh.... :nyehehe:

 

[Zoggee]

Originally posted by flash@Sep 27 2005, 12:37 PM
Some of you guys may know that I am also looking at the option for more power at a price that I can afford. My holy grail is to get a M50B25 halfcut and transplant all the good parts over.... but that is currently out of the reach of my pocket. :beaten: So I might have to settle for somewhere in between.

My mech has advised me, if I really want to go 2.5L, I should do it right and get a 2.5L engine. With my style of driving, he would not recommend me to bore out and stroke my 2.0L engine (M50) to 2.5L. It might not be reliable and might not tahan my trashing. The most he might go with my 2.0L engine is to bore it to between 2.1 to 2.2L. Not enough.

So I am still waiting for durian runtuh.... :nyehehe:

whao..Flash..?? have you seen an M50B20 short blocks??? Whats the gap between the piston sleeves..??? :blush:

Even if you are able to bore it to fit in larger pistons and get it running....ur DME wont..!!! Reliability bro..reliability. BMW kaniniaboo...!!! they are not stupid. h34r:

 

[flash]

Originally posted by Zoggee+Sep 27 2005, 08:49 PM-->QUOTE (Zoggee @ Sep 27 2005, 08:49 PM)