327i help

[AdamAnt]

Hey guys, looking to build up a 327i using my eta block as a base.

Wanting to run the 323i head, Intake and throttle body.
Along with 325i ecu.

Im pretty sure the mechanics will work together fine, jsut wondering if the 325i ecu is capable of running it.

anyone done this build?

[daimlerman]

You need a modified chip from Ant/zone shop.There is a fitting guide in the articles section.Look forward to loads of torque!!

[AdamAnt]

so there is no way it will run with a standard 325i dme?

[daimlerman]

The increase in stroke changes the mean piston speed (I think thats the correct thing) which has a bearing on the timing.I would expect it to run on the standard chip,but an improved one is only about £50.

[ric325i]

get the better chip!

i know one guy from the zone (name ? sorry) has a 2.7 in a tourer and he got 168bhp on thr rollers but about 197 torques which is cool!

dont know what management he was tunning though

[Ant]

2.7 needs a 2.7 chip guys, stroke is changed as is capacity so the rest is obvious IMHO.

2.5 chip file will have more timing than ideal and the WOT fuelling will be leaner than the tower of Pisa.

Ill advised, dont risk it !

A-Tech 2.7 chip is £65 and proven to work well in the application ( 225.6hp ) when combined with a well speced 2.7

[surj]

i understand that timeing will be out but i got a 2.7 running on standard motronic 2.5 ecu and its scarey i will get a chip sorted out but ive got more serious things to spend it on at the mo should not hurt to run it on the 2.5 for a bit

[AdamAnt]

why is it scary?..still run ok?

[daimlerman]

Read Ant's post again!!

[AdamAnt]

ok ok....its all about cost though...ant does ur chip work with the eta dme box?

[ed325i]

Wanting to run the 323i head, Intake and throttle body.

I would fit a 2.5 intake/TB the 323 one is a bit small.
I think all Ant will need is the ECU number.

[AdamAnt]

but the intake pots on the 323i head are different to the 325i one, wont the 323i head need work to correctly mate with the 325i intake?

[Jhonno]

yes but for a better end result

[ed325i]

but the intake pots on the 323i head are different to the 325i one, wont the 323i head need work to correctly mate with the 325i intake?

You just get a 325 gasket and grind out the port to match.
Here is a pic of a 2.5 head which is the one at the top and a 323 one at the bottom

[AdamAnt]

ok...ill see what i can do any ideas what injectors i shuld use?

[Jhonno]

325i

[AdamAnt]

alright, here is what i have got so far

323i head 731 cast
323i intake manifold and TB
M30 AFM
and a set of Falcon Injectors.

Ant, will your chip work fine with the existing engine management?, and how much are we looking at shipped to Aus?

Should be going together soon so ill see how it goes, teh head looks to be in good condition, apparently it had low milage, so the only work im going to do on it is a bit of a clean and chuck in some double valve springs. does anyone know the duration and lift on the 323i cam?

[Ant]

My chip will be fine on STD injectors and AFM, you dont need anything else for you spec level dude.

If you need 325i Injectors I have 60+ sets in stock , happy to post to Aus

[E30Mark]

Depending where you are in Aus i might be able to bring bits over, I'm there from the 27th Sep for a month

Of course this would depend on Ant getting the bits to me... might be too complicated, but hey i fancy a E30 meet whilst I'm on holiday. I'm touring around SA, Vict, NSW areas.

[beardymat]

get the better chip!

i know one guy from the zone (name ? sorry) has a 2.7 in a tourer and he got 168bhp on thr rollers but about 197 torques which is cool!

dont know what management he was tunning though

that one belongs to adams and is the one i built.etta bottom end with a 320 head taken out to 325 spec including the bigger valves.

i initially ran it with the standard 325 ecu for a couple of days before taking it to chipped uk for a remap. the map released quite a lot more torque and you could deffinately feel the improvement.well worth investing in.

[ed325i]

I wouldnt use a the m30 AFM.

[AdamAnt]

ok thanks for your help fellas ...im in sydney, so it'd be great if your in the area, all i need from ant is the chip, how do i go about ordering one?

[AdamAnt]

oh and why not to use the m30 afm, ive had it on b4 with swapped internals and it seemd to work fine, idle was a little bit funky but apart from that it was prety sweet, also helps me bolt on the huge cone filter and the heat shield i made.

[ed325i]

People on here have used the m30 afm and found they lose power, if it worked alpina etc would have fitted them ? If you have it on the rollers try it with the m30 afm and the m20 afm and see which is best.

[daimlerman]

I am using a Miller MAF in place of the AFM.In a nutshell it removes the flappy valve arangment and improves throttle response,the downside is cost!!My 2.7 uses a standard small valve head with a 325 cam and 325 inlet,T/B and injectors.It made 189.6BHP,with a shed load or torque,last Saturday.My next stage will be to try a small valve head modified to take 325 valves with a recently aquired 323 cam...if I can conceal the nessesary cost from 'er indoors,I am saving for a zone shop type exhaust manifold.But I value my dangly bits....

[M5pilot]

If someone is going to go to the expense of building a 2.7 it is ESSENTIAL that the engine is setup up properly.

Sticking in some generic map (chip) is highly ill advised. Take your car to somewhere with a rolling road and have a custom map done. Every 2.7 is going to be different (compression ratio, cam profile and general other surrounding parts such as manifolds, throttle body sizes and intakes)

Having a rolling road has been an eye opening experience. It is scary how many cars are running either way too rich or way too lean using generic maps and chips on standard and heavily modified cars. I've seen this on highly modified E36 M3's, ZM's, Ford Mustangs and many many other cars.

With a rolling road you can see exactly what the engine is doing and how it's fuelling and a competent tuner can make adjustments to suit.

A 2.7 rebuild even self built usually ends up costing £1000+ and lots of hard work. What's £300 to get the most important aspect (ignition timing and fuel) setup up properly??

Sorry guys, but sticking a £65-£100 pre made chip is a serious false economy.

It's all good on a fairly standard car with the run of the mill bolt on parts.

Evo-S

[reggid]

People on here have used the m30 afm and found they lose power, if it worked alpina etc would have fitted them ? If you have it on the rollers try it with the m30 afm and the m20 afm and see which is best.

properly tuned vs properly tuned an M30 AFM would make more power but the problem is how many people have had a retune with the M30...i would say not to many.

[daimlerman]

M5pilot is making a lot of sense there.When my car went on the rollers it was seen to be running a little rich in the mid-range.I asked the operators advice and he suggested that it was not extreme enough to cause problems,and made the point that it was safer a little rich rather than running weak.The amount of information that can be gained from a roller session is impressive,much better than quesswork!

[surj]

my 2.7 is the earlier 2.3 bottom end bored stroked to 2.7 with running motronic 284 schrick cam the head was skimmed to the min i dont no what ratio the diff is but its quick 2nd is good and 3rd just silly