M42club.com - Home of the BMW E30/E36 318i/iS
DISCUSSION => Engine + Driveline => Topic started by: no1_jazz on April 29, 2008, 01:57:53 PM
-
Hi guys,
I was wondering if anyone of you lot could give my friend and I some help and advice for this project of mine.
I have a 1990 BMW E30 31.8IS of course lol totally standard. Rite before the big changes such as super chargers and turbo’s I would like to achieve the maximum power and performance I possibly can out of the IS M42 engine.
What can I do to gain these additional powers to the engine without supercharging it and without installing a turbo init?
All help will be much appreciated many thanks
Jazz/ Mike:o
-
Dude, do a little research around...
But with no more details on how much money you can spend,what use this engine will have what resources you have, and what market you want to look at, we can speak about a looooot of things.
So if you can go "open wallet" get a M47 crank, bore the block to 86,4mm so you can use M3 pistons for high compression, port your cylinder head, get a good exhaust system, good spark plug wires (Magnecor works perfect), get a good chip, and bigger cams like schrick,Metric M. or some other.
I hope this helps.
-
search is your friend. there is many threads about this.
in short though:
stroke it, m44 crank, or m47 crank
get some oversized pistons
lots of head work, new cams or regrings, oversized valves, light weight valve train, etc...
individual throttle bodies.
edit: damn you for posting before me!
-
kowalski looks like we know this engine, huh?
JAJAJAJA!!!
-
Cheers guys for the quick responce so if i do go donw the route of getting
a M47 crank, bore the block to 86,4mm so i can use M3 pistons for high compression
how much would that set me back with parts and labour?
also i have done some research on getting a 32.5I Alliy Clutch and Flywheel..... is this going to make a big diffrence in pwoer and persormance?
i have read up on Jim Conforti Super chips does anyone knwo if these are any good?
Many Thanks
Jazz
-
anyone?
-
also i have done some research on getting a 32.5I Alliy Clutch and Flywheel..... is this going to make a big diffrence in pwoer and persormance?
i have read up on Jim Conforti Super chips does anyone knwo if these are any good?
Chip is good, made a noticeable difference in general behavior, but forces you to run high-octane at the pump.
Lightweight flywheel does two things:
1) Makes it a requirement to know how to control the throttle and clutch together.
2) Improves acceleration once the engine "ramps up"
The reason for number 1: there's a lot of energy in a heavy flywheel, which makes up for the low torque of the motor when starting from a stop. Once this mass is reduced, it's easier to stall, but the engine can spin up faster (and slow down faster), so overall performance is increased. No gain in actual HP numbers, just increased performance from weight reduction. May cause the tranny input shaft to "chatter" when sitting in neutral. No harm, just noise due to harmonics.
-
Thanks alot for the help guys, but one more thing is it possiable to gain such powers on the IS with a turbo and supercharger in comparrasion to the ford escort COZWORTH engine it is also a 16v 4cly ?
as you guys can see i have compatition?
-
Anyone Please?????????????????
-
???
-
With enough time, money, and boost, you could definately achieve more power than the ford engine-not familiar with that engine, but it can't be too crazy stock. It all depends how far you are willing to go.
-
Hi there again!
Ok the combo M47/M3 pistons put me back around 600€ which today is about $900
With this and a few more parts, you will end up with around 170 rwhp, and looots of torque.
With a DASC (supercharger) and stock engine, you would get around 200 rwhp.
And the combo that I´m looking at is the 2.1L stroker, and DASC, should give me no less than 230rwhp.
Cheers!
-
dasc isn't in production anymore because the 3rd gen of eaton supercharger stopped production.
-
that doesn´t mean you can´t get a dasc anymore...
Just buy from them the whole kit except for the supercharger. I´m sure there are lots of eatons up on ebay...
-
sure that's plenty on ebay, but you need to find the correct one that line up with that manifold.. ;)
otherwise just buy a used kit... there is one for sale now...
-
H guys again thanks alot for all the information....... im thinking is ti even worth doing up the m42 engine anymore because the money i will be spending on the IS im better of starting with something stronger and which has more natrual power something like a s50 or 2.5i which has standard 190rwhp i think i do live in london guys and money well for pure preformance i have 2000 pounds thats parts and labour i do nto have a garage so i can not do the work myself...\
the cosworth engine 2.0Turbo are engines not to be messed around with when it comes to off the line, mid range and top end preformance and acceleration. They come with 350BHP stock and after that you also have the option to play around with the bugger to gain more power..............Now the question is......IS it worth working on such a small 1.8IS which only comes with 136bhp or shall i start of with somethign with abit more power i.e. m50b25 = 2.5i or the major s50
GUYS I NEED HELP !!!!!!
-
Sounds like you are looking for what I call a "stoplight" car. The M42 is not designed to be that type of car. It is made for back roads where horsepower does not matter as much. You should look at other options beside the M42. These cars are not about horsepower.
-
i am not after a spotlight car lol all it is i dont knwo weather to spend on the IS or just get the cozworth engine i mean i was thinking to do the IS up but now it just makes more sence that ill be spendin more then i have on the IS just so it can be close to the natrual power of a cozworth engine which also is a 4cly 16 val. what is it that the COZWORTH ENGINE HAS that the IS DONT i mean they both quick engines and both are 16v 4cly but the cozworth is just that much more rwpower ??????