320 with 325 throttle and chipped ecu

[dannyboy759]

Just installed a 325i throttle into my 320 touring and a spare ecu that I had with an active autowerke chip in it.
Its made hell of a difference to the trottle response and the torque of the car.
Not sure if its done any power increase but it goes well.
I might try changing the inlet manifold to as the one on the car is the standard 320 one and then change the injectors.

[cypriot_boy_2k7]

y not just get a 2.5 drop er in

[StuBeeDoo]

I might try changing the inlet manifold to as the one on the car is the standard 320 one and then change the injectors.

Mate, don't change the injectors!
Personally, I wouldn't use the 325i manifold either, but that's open to debate.
When I did mine, all I did was open out the mouth of the 320i manifold (making sure there is enough "lip" for an air-tight seal) and fit a "wild" chip. I've never had the car on rollers, but it's definitely far better than standard.

[ed325i]

Personally, I wouldn't use the 325i manifold either

Why not

[StuBeeDoo]

Personally, I wouldn't use the 325i manifold either

Why not

I'm a mid-range man Ed. The bigger runners in the 325i manifold will be better for top-end but at the expense of mid-range - which the B20 is already sadly lacking because the standard runners and ports are too big.
Like I said, it's a personal thing.

[ed325i]

What about using the eta inlet

[dannyboy759]

Yeah get you with the inlet manifold thing, it works fine as it is and to be honest the extra grunt is where it should be.
I mean I took it out today adn i had two adults and two kids in the car with a boot full of stuff and a full tank of full and the thing just pulls from as low as 2000rpm perhaps even a little lower.
So why wouldnt i want to run 325 injectors?
Seems right thing to do if im running a 325 ecu and a chipped one at that.
And whats the difference between a 325e manifold and a 325i manifold i know the 320 the intake holde is smaller but it lists the eta part as a completely different number to either the 325 or the 320.

[StuBeeDoo]

So why wouldnt i want to run 325 injectors?

325i injectors will flow too much and cause over-fueling. The 320i injectors are capable of flowing enough for a 2.3 engine, so they will be good enough for your engine.
It doesn't matter what ECU you're running as long as the chip in it is the right one. You can run a 325i on a 316i ECU as long as it has a 325i chip in it. If your ECU has a 325i chip, the ignition and injection timing will be wrong.

[ed325i]

whats the difference between a 325e manifold and a 325i manifold i know the 320 the intake holde is smaller but it lists the eta part as a completely different number to either the 325 or the 320.

The eta inlet has small ports like the 320 one but has longer runners, giving more low down power like the eta.

[Andyboy]

whats the difference between a 325e manifold and a 325i manifold i know the 320 the intake holde is smaller but it lists the eta part as a completely different number to either the 325 or the 320.

The eta inlet has small ports like the 320 one but has longer runners, giving more low down power like the eta.

No it doesn't! The Eta head uses the tiny ports from the old E21 320 and 323i heads. That won't be any good at all.
I would use a 325i manifold as it just makes it a tidier job.

[ed325i]

Best not use the eta one then.

[oze30]

whats the difference between a 325e manifold and a 325i manifold i know the 320 the intake holde is smaller but it lists the eta part as a completely different number to either the 325 or the 320.

The eta inlet has small ports like the 320 one but has longer runners, giving more low down power like the eta.

??? Isn't the low down power being caused by the fact it's:

a) 2.7 and
b)it's a 2.7???

Oh.. forgot

c) It's built as a torquey engine rather than top end hence having a 5-6k redline.

[diamondblacke28]

i used m50b20 520i injectors in my 325i the spek figures of them are slighty higher than the m20b25 ones.
and there is some improvement in my 325i i think it down to the better spray pattern and fanning out for the fuel.

[ed325i]

whats the difference between a 325e manifold and a 325i manifold i know the 320 the intake holde is smaller but it lists the eta part as a completely different number to either the 325 or the 320.

The eta inlet has small ports like the 320 one but has longer runners, giving more low down power like the eta.

??? Isn't the low down power being caused by the fact it's:

a) 2.7 and
b)it's a 2.7???

Oh.. forgot

c) It's built as a torquey engine rather than top end hence having a 5-6k redline.

Yes but inlet design has alot to do with it to >> http://www.e30zone.net/modules.php?name ... =eta+inlet