Fitting a E60 M5 MAF to a C230K, any comments or experiences?

[dokotela]

Dok, a few question for you if you don't mind.

I fitting my new over sized next week, should I fit the M5 MAF too?
What I'm concerned about is the engine running too lean ( I've no way of checking the AFR) and I've have read some horror stories on one or two SLK sites (of course among positive stories also) about just fitting the over size pulley.

Are you fairly sure I don't need to up the fuel pressure and run cooler plugs?

Also, how necessary is it to have the engine remapped?

Thanks in advance.

If you have a good MAF, then I see no reason to fit the M5 MAF. As krumb pointed out, the knock sensor will prevent detonation by retarding our timing.

You don't need to up the fuel pressure. But fitting colder plugs would help for performance.

[John Jones Jr.]

Thanks again K-B.

[John Jones Jr.]

Thanks Dok.

Any idea of what cooler running plugs to get?

[dokotela]

It's 1 number up on the Bosch plug...can't remember exactly. 7/8

[KrumB]

I use NGK BKR7E

@ 0.8 mm

They're ment for water jet engines so don't surprise!
Work great for us!

[John Jones Jr.]

And again many thanks, Dok & K-B.

[adik590]

Will they fit our cars?
http://www.ebay.com/itm/251254698883...84.m1438.l2649
W202 C230K 1999 AT

[John Jones Jr.]

I think the standard plug should be NGK BKUR6ET , Beru 14FGH-7DTURX0 or the equivalent BOSCH (don't know the number, sorry). I'd reckon the ones on eBay will do but they are a colder running plug.

[Abbaso]

Hi guys just thought I'd thank you guys for starting this thread. And thanks to K- B for the Bosch part no. On the Maf. Went to Bosch direct and met a mate of mine that schooled together and he gave it to me for like 50$!
4 bar fpr is on order from Germany at like 45$

[John Jones Jr.]

Wow, only $50! You should have bought several & resold them. Abbas, why are you changing the FPR?

[Abbaso]

Yeah i was kina shocked myself at the price the local spare shop wanted like a 100$..Don't wana take the chance of running lean once the pulley is fitted( still waiting on delivery) . But will check afr's once pulley is fitted. If all goes well might get the s/c pulley machined down as well. Spoken to a guy who has machined a mini cooper s/c pulley sez if the clutch can be removed he can do it.

[KrumB]

Hi,
You're welcome.
The s/c pulley is not connected to the clutch.
Looks like this:
http://mercedesdata.files.wordpress....211-235333.jpg
http://mercedesdata.files.wordpress....211-235319.jpg

The lowest you can go is 87mm.

[John Jones Jr.]

Ah, K-B your still kicking about. Reckoned you'd gone off and got a BMW or something! Any news on your car?

[John Jones Jr.]

Yeah i was kina shocked myself at the price the local spare shop wanted like a 100$..Don't wana take the chance of running lean once the pulley is fitted( still waiting on delivery) . But will check afr's once pulley is fitted. If all goes well might get the s/c pulley machined down as well. Spoken to a guy who has machined a mini cooper s/c pulley sez if the clutch can be removed he can do it.

Post up a photo of the new FPR install when you do it, I'm thinking of doing the same as but have not investigated fitting one yet. Also, I'm thinking about getting the S/c pulley machined but not down to 87mm (see K-B's post), maybe just to 90mm. What's the original diameter, 94mm?

[KrumB]

BMW? Haha everithing is too easy there.

I checked the AFR ratios and I'm running a bit lean mid RPM. Around 14.1-14.5 and intake temp is a bit high 55-60 DEG C (25 ambient).
So I decided to change the IC with a bigger one. The other thing that's on my mind is a piggyback ECU and a extra fuel injector. I friend of mine that helps me with the car offered me a SMT6 ECU.
We'll see what happens.

How's your car doeing?

[KrumB]

Yes. Original the diameter is 94 mm.

[John Jones Jr.]

Interesting about the AFR, I presume the only reason for that is the machinied the S/c pulley along with porting the S/c?

Yeah, thanks for asking. My car is flying, just waiting on a new Cam solenoid/magnet (see my other thread). I did have a slight problem, actually it was a dangerous problem as I lost all boost pressure twice, once while overtaking several cars in one hit, pulling 80+!!! The boost pipe was coming adrift on sudden WOT even with new heavy duty screw clips. Now I've fitted some T-bolt clamps & all seems o.k.. I'll be changing the CPS just in case, worth doing imo, changed the FPR also, got a genuine M-B (Hella) one for €9.

[KrumB]

Yes the combination of the machinied the S/C pulley and the porting the S/C gives quite a bit of pressure. I've got 10 psi @ 2000 RPM, 12 psi @ 3000.

That thing with the pipe...not good. You will have no worries with the T-bolt clamps!

[Abbaso]

Post up a photo of the new FPR install when you do it, I'm thinking of doing the same as but have not investigated fitting one yet. Also, I'm thinking about getting the S/c pulley machined but not down to 87mm (see K-B's post), maybe just to 90mm. What's the original diameter, 94mm?

It's easy as pie. Remove the vacuum pipe then circlip holding down the fpr and it's off. There's a Bosch 4 bar regulator that will pop right in. About the s/c pulley was also thinking of not all the way down to 87mm
Would never sacrifice power for reliability.

[Abbaso]

[QUOTE=KrumB;181998]BMW? Haha everithing is too easy there.

I checked the AFR ratios and I'm running a bit lean mid RPM. Around 14.1-14.5 and intake temp is a bit high 55-60 DEG C (25 ambient).
So I decided to change the IC with a bigger one. The other thing that's on my mind is a piggyback ECU and a extra fuel injector. I friend of mine that helps me with the car offered me a SMT6 ECU.
We'll see what happens.

Do you have any pics of the inter cooler and was it a mission to install?
I've spoken to a tuner regarding the piggyback chip and he advised to rather go software reason he says is that they only tune in open loop and our ecu's might revert back to normal when in closed loop. Well something to that effect I'm not yet clued up on the open and closed loop tuning. The SMT6 is a perfect power chip right?

[John Jones Jr.]

It's easy as pie. Remove the vacuum pipe then circlip holding down the fpr and it's off. There's a Bosch 4 bar regulator that will pop right in. About the s/c pulley was also thinking of not all the way down to 87mm
Would never sacrifice power for reliability.

That easy? I never really looked at mine, that's great. Abbas, have you got the Bosch part number?

[John Jones Jr.]

I've got 10 psi @ 2000 RPM, 12 psi @ 3000.

That thing with the pipe...not good.

10psi @ 2000! Wow, that makes real life driving very interesting & no doubt easy too.

As for the pipe, well it means I'm getting good pressure quickly!

[Abbaso]

That easy? I never really looked at mine, that's great. Abbas, have you got the Bosch part number?

Yep that easy JJR Bosch part no. 0280160575

[Abbaso]

Is that at the fpr or vacuum off the s/c?

A question is there a hole on the firewall where I can connect the boost gauge inside the vehicle? For test purpose i just run It outside and into the window. Was thinking of mounting the gauge in the glove compartment try and keep it oem as possible.Don't wana be drilling into her to connect boost gauge. And finally if I get the s/c pulley machined wana connect a wide band digital afr gauge int g compartment as well.

[John Jones Jr.]

Yep that easy JJR Bosch part no. 0280160575

Top man.