Who has the Fastest & Most N/A HP 330i; Ci; Xi?

Starting to grow on me...

Lighter, cheaper, cheaper tires. How can you go wrong?

Originally Posted by TrippinBimmer

Starting to grow on me...

Originally Posted by aggieE46

Lighter, cheaper, cheaper tires. How can you go wrong?

Wish it was concave 5 point.

Originally Posted by hassmaschine

I'll tell you a little secret - S54 and M54 injectors are the same thing. The only difference is the S54 runs them at 5 bar and the M54 runs them at 3.5. you'd be far better off using your stock injectors and just increasing base pressure to get the fuel flow you need. there are other characteristics that change with injectors that are not desireable unless you can recalibrate everything. And it would still be better to recalibrate the tune for your new "real" fuel flow.

using 30# injectors with a tune meant for 24#, and using a FPR to adjust everything is not going to end well.. by the time you get the base pressure low enough for it to run, your fuel atomization will be pretty poor. you can't tune a modern DME using a FPR anyway, it's always going to be fighting you with adaptations.

no matter how badly people want it to be, adjusting base pressure with an AFPR is not tuning.

I agree with most of what you are saying. I had a call today "John" at RC Injectors, we went through several calculations using both the 24LBS & 30LBS injectors. After looking at all the available data, his thoughts were it was right on the edge of either size injector. On one hand John said, you could really try to max out the 24 LBS injector to see if it worked out, but may find the motor running lean up top. On the other hand John said, the 30 LBS injectors might run great from 3K to 7K RPM at W.O.T. with perfect/desirable AFR numbers, but the motor might run a little rich with slight drive-ability issues at idle / part throttle. Johns final thoughts were to start with my 24 LBS injectors & run them up to there maximum limit, as needed. But if the fuel system can't push them hard enough or the motor starts to run lean up top, it's definitely time to install the 30 LBS injectors.

Only time will tell.


Rob

So based on xixixi's velocity stack & air filter, that all got me thinking. So after a little research, I decided I wanted a velocity stack that perfectly mated to a cone type air filter. This is what I came up with:


1) http://www.summitracing.com/parts/SPE-889606/

2) http://www.summitracing.com/parts/SPE-9603/

I just ordered both of these from Amazon, $44.98 with free shipping.



Rob

Originally Posted by Rob43

So based on xixixi's velocity stack & air filter, that all got me thinking. So after a little research, I decided I wanted a velocity stack that perfectly mated to a cone type air filter. This is what I came up with:


1) http://www.summitracing.com/parts/SPE-889606/

2) http://www.summitracing.com/parts/SPE-9603/

I just ordered both of these from Amazon, $44.98 with free shipping.



Rob

Nice, I paid more for just my filter!

Are you going to get a couple turbonators inline?

Originally Posted by aggieE46

Are you going to get a couple turbonators inline?

No. Turbonators produce way to much HP for the BMW inline 6. In all honesty, if money & time were no object, I'd dyno the Turbonator thing just to see.

What's funny about you mentioning the Turbonator is, I remember coming up with an idea along time ago; it goes like this. The SCCA rule book says you're able to do anything you want, plus or minus 1" from the intake gasket. So you can port match the intake to the head anyway you see fit, gasket material is "open" (meaning any type you want to use). My crazy idea was to build a "one off" gasket with 6 miniature Turbonator's built into each of the 6 gasket transition holes. Thus the spinning / swirling effect would be aimed right at the valve / combustion camber. I'm sure it wouldn't work, but I remember thinking what a clever horse power producing idea I've come up with ! Youthful Optimism.

Individual turbonator bodies...

Rob, on that V stack did you ever confirm if it was plastic or steel? Says plastic at the topof the page. But steel at the bottom?

Originally Posted by hassmaschine

I'll tell you a little secret - S54 and M54 injectors are the same thing. The only difference is the S54 runs them at 5 bar and the M54 runs them at 3.5.

the s54 uses 29# injectors (rated at 43.5psi) the m54 has 2 different size injectors (b30 and b25) the b30 has 24# injectors (again rated at 43.5psi) and the b25 has 19# injectors
the s54, and m54 both run 5 bar fuel pressure, also from what I remember the s54 injectors are shorter than the m54

Originally Posted by hassmaschine

no matter how badly people want it to be, adjusting base pressure with an AFPR is not tuning.

Agreed. retune for larger injectors

Rob,

I thought you were a fan of the Cosmo Racing long-tube CAI solution, no?
Let us know how well these fits! Essentially that would be a much cheaper alternative to the aFe Stage 1 intake design, except the aFe also has the metal enclosure. Is it going to fit inside the stock airbox or are you building some other enclosure to keep hot air away from it?

Originally Posted by Rob43

So based on xixixi's velocity stack & air filter, that all got me thinking. So after a little research, I decided I wanted a velocity stack that perfectly mated to a cone type air filter. This is what I came up with:

1) http://www.summitracing.com/parts/SPE-889606/

2) http://www.summitracing.com/parts/SPE-9603/

I just ordered both of these from Amazon, $44.98 with free shipping.
Rob

Originally Posted by xixixi

Rob, on that V stack did you ever confirm if it was plastic or steel? Says plastic at the topof the page. But steel at the bottom?

I'm betting anything that it's plastic, I really don't care as long as it does its job.

Originally Posted by LivesNearCostco

Rob,

I thought you were a fan of the Cosmo Racing long-tube CAI solution, no? Actually I'm a big fan of that cheap CAI from Cosmo. When a forum member has a stock air box & wants to upgrade to a CAI, they're usually looking at $250 to $400 CAI's. That cheap Cosmo Racing CAI really will work, is very cost effective, & will make a few WHP. For $146, it's a win win product in my book.
Let us know how well these fits! Essentially that would be a much cheaper alternative to the aFe Stage 1 intake design, except the aFe also has the metal enclosure. Is it going to fit inside the stock airbox or are you building some other enclosure to keep hot air away from it?

I'm going to run it down low like any good CAI, one of the key things to do when making your own CAI is to make sure you have a minimum 4" of straight tube leading to (in front of) the MAF. It's important for the MAF to have "straight" or "clean air" for proper operation.

This filter & velocity stack could easily replace (as long as the dimensions work) any short ram or cold air intake system, filter component.


Good luck.

Originally Posted by Hobbit382

the s54 uses 29# injectors (rated at 43.5psi) the m54 has 2 different size injectors (b30 and b25) the b30 has 24# injectors (again rated at 43.5psi) and the b25 has 19# injectors
the s54, and m54 both run 5 bar fuel pressure, also from what I remember the s54 injectors are shorter than the m54

I had a set flowtested, as did my friend with an M54B30 (by witchunter). They are the same exact injector (24# at 3 bar). the only difference is the S54 injector is shorter, as you said, thus the different BMW part #. The siemens part # is the same, 1439800. Only the body is different.

The 330/325 runs at 51 *psi* (3.5 bar), not 5 bar (~73 psi). the regulator/filter assembly for the S54 is vastly different, as is the pump. And it only runs at full pressure under high load (PWM controlled FP relay! neat!), probably because it would be too noisy at idle/low speeds.

Effectively the 330's injector is ~26# at 3.5 bar, and the S54's is ~31# at 5 bar. That's why the S54 can make 300+hp with the same injector.

Originally Posted by hassmaschine

The 330/325 runs at 51 *psi* (3.5 bar), not 5 bar (~73 psi).

shit, your right...

yeah, I thought you might be right on the injectors (AKA I got ripped off) but I found pics of M54 and S54 injectors, while they do look different (and mine are for sure S54), they use the same siemens part # for whatever reason. I still want to have a look at my set to double check though, maybe the injector place got it wrong. :p

edit: I'm leaning towards the injector place being wrong (WTF - they've only flowtested 1000's of injectors!).

Went to the "Race Shop" today, Big things in motion !



Lee Y., where are you ?




Rob

^ WOOT! Can't wait to see results ROB!