i put a cone filter on my 318iS and noticed a massive difference, the engine can breath easily now and isnt restricted by the tiny hole in the original air box which was the entrance for the air
i love my k&n cone filter, just wish i could fit the bmc cda with a cold air in take somewhere :(
with that £500 you have to spend buy your misses a car she will love you for ever more and keep the bm for your self know thats what a would do
theres a guy on my street who does remaps an he claimed hed get 10bhp n around 10nm more torque for 250 quid on my i.s i had a stream of thaught the other day but im not a hundred percent on how it would work
but the 318is is a 1.9 so theres not a large bore diffrence between that and a 325 say specially as that is a 6 cylinder so would it be possible to take four injectors from one (im assuming there larger here) and up the fuel pressure n team this with a aftermarket filter for more air intake?
there isnt much point in going and throwing too much money at the m44 engines as previously stated they are pretty good from the factory speak to RYM he managed to lose power after fitting an exhaust, filter, etc
the usual suspects are whats needed eg. filter, exhaust, remap and you may see 10-15 bhp if you're lucky, bbtb might be a worth while mod as well but i would do this before a remap so it can be taken into consideration
personally i wouldnt bother with larger injectors unless you are looking into forced induction or you are thinking about going down the 2.1 route but both of these require alot of work and and money to complete
there are a few more things like fitting an electric fan and removing the viscous coupling could possibly (or not) free up 1 or 2 bhp but for the work and money involved is it really worth it?
Last edited by disco!!!!; 15-06-2010 at 16:36.
opinion on tuning the M44 with a small budget, but first the blah blah stuff.
There is always a lot of talk on, not worth it blah blah blah. Well if you want big power you have to pay. Its how far you want to go.
An engine swap is a cheap and easy option, but that’s missing the point. The best bit about the four cylinder is its light, all the weight behind the front axle line and it is tune-able to 300bhp, maybe more if you see some of the US tweeks.
Turbo is the big power option. It costs money though. However, I reckon with a bit of savvy you could do it at reasonable cost.
Supercharging is fun, linear power delivery and great noise. But expensive. Starts cheap but quickly develops to wonga land !
Ok. M44 on a budget
The usual tuning premises apply, you just need to combine them to get the best from the engine. The sum of the parts will create the biggest gains. You wont really ever get massive gains without a proper re-build though. But you can improve it.
Single items wont give you 50hp++ haha
Cold air feed - dead simple to do, cheap and will help
Airbox/filter - cheap enough, K&N as long as its not heavily oiled, Simota or ITG such like.
Exhaust - sports system can improve sound and will make some difference
Cat converter - go sports cat, still gets through MOT with increased flow capacity
Throttle body - Larger main butterfly and gas flowed, increase 15% flow
Cams - Will give a big gain,but can be expensive once you include followers and fitting
Remap - again can give improvements, but you need to improve the breathing, as with mods above.
Also loose some of the power sapped by the engine,
ie viscous fan – convert to electric
Duel mass flywheel – ditch this, get a single mass and have it lightened.
You could even go electric water pump, but you need to do belt changes then.
Pickup will improve with the above, it may not be a lot. But the sum of all the mods will add up.
ITS IN THE DETAIL
These are my views, you can agree/disagree. I have done most of the above and they all add up. My next trip to the rolling road should show an improvement on last time.
And to follow it did, up now to 226hp. just shy of my 230hp target.
cheers folks, well i dont have 500 sitting in my pocket am planning on just buyin bit by bit and gathering stuff, defo considering BBTB's, air filter or a CAI but along with that am going to replace standard parts etc that need done bushes, timing etc, as am not wanting to throw 300 in then sumit goes bang!!
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