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I have fitted the Carlsson C-Tronic ECU unit and their high-flow intercooler (which looks and feels suspiciously like the CDI stock FMIC unit..
Please elaborate, if that's the case then maybe I should just order the CDI version how were you able to know it's similar to a CDI unit? Stock for stock would diesel versions need a larger FMIC?
Please elaborate, if that's the case then maybe I should just order the CDI version how were you able to know it's similar to a CDI unit? Stock for stock would diesel versions need a larger FMIC?
CDI's do use a larger FMIC. That extra compression in the diesels needs much more intake.
It's been two years since I last saw a CDI intercooler in the flesh, so don't take my word for it, but I am pretty sure that's what Carlsson has provided me. That said, their price for the unit is cheaper than MBAu will sell me a CDI unit anyway.
Here is the new Carlsson unit next to the OEM C200cgi one:
I'll snap some pics of the ECU piggyback over the weekend
The end tank design looks like it bottlenecks compared to the CGi unit. I just checked the OEM FMIC between CGI and CDI, here are the measurements.
CGI
Length: 626 mm
Width: 127 mm
Depth: 62 mm
CDI
Length: 625 mm
Width: 128 mm
Depth: 62 mm
These measurements don't seem that radical that it would do much difference if the Carlsson unit is in fact a CDi unit would it?
Edit, After checking again as the CDi measurements I posted above are from a C200 CDi, it seems the C220 CDi measurements would match what you posted better. With that taller face I could see it being somewhat more efficient.
220 CDi
Length: 625 mm
Width: 143 mm
Depth: 62 mm
Last edited by Knightmare69; Aug 22, 2014 at 04:19 AM.
Knightmare69, could you please post the intercooler sizes that are on the V6 CDI's?(eg. C300CDI, C320CDI, C350CDI).
I am intereseted in changing the intercooler on my C200CDI and as far as I know the biggest intercooler I can install is the one from the C220CDI. The C250CDI is a biturbo so it's intercooler can't fit on my car, but what about the bigger diesels?
Dynos are really for fine tuning in my opinion.
I might dyno it in the future but, seeing as we can't really play with the tune, I'm not really bothered. After all, it's only going to give me an arbitrary figure that I won't be able to change too much.
didn't get time to do the headlights but I did the grill. No plasti-dip. I deconstructed the grill and sanded it back, then primer, gloss black and clear coat. DIY thread to follow.
Before:
After:
I was under time constraints to reassemble so I had to put it back on the car tacky. As a result, right below the star are two chunks of missing paint. I will be able to fix those on the car so stay tuned for a DIY on that also (I guess my mistake will be everyone elses boon )
The end tank design looks like it bottlenecks compared to the CGi unit.
I noticed that too but I would assume Carlsson did some R&D and figured it would work well enough.
Also AusMB87, can you let us know if you experience any lag with the larger FMIC? From what I understand, a larger intercooler but smallish turbo usually creates room for lag, even with the tune it's more the size of the turbo that will affect how it works with the intercooler.
Last edited by Knightmare69; Aug 25, 2014 at 05:12 AM.
The main source of turbo lag is volume within the intake between the turbo and the manifold. While you want a large enough diameter to prevent restriction, if you have too much empty space the lag will build up. Additionally, the larger the area, the slower the air flows through it (see venturi effect).
Also, note that the carlsson unit flares out much larger into the wider core.
It's all about balance, especially when we are talking about such a small turbo with such a long distance to the intake manifold. I can tell you that there is a noticeable difference between the tow units, as felt in the drivers seat.
Looks like an aggressive offset! Can you post more pictures of the poke from the side? As in, looking down the length of the car from the front and rear?
Looks like an aggressive offset! Can you post more pictures of the poke from the side? As in, looking down the length of the car from the front and rear?
That was jsut a test fit mate, I need to get some longer wheel bolts and different rubber before it's done. I will post picks as soon as they are mounted.
sizes are:
front - 18x8.5 ET31
rear - 18x9.5 ET35
I know the rear will fit with some stretched rubber but the fronts, well, that's pretty out there.
I will fit them with stretched rubber and see what happens. I think it will be ok until I lower it, then I think I'll need to have the offset machined down a bit
Just picked up some Carlsson lowering springs for $200 shipped. Also ordered the 5mm rear shims. I will probably look at shaving the front shims to suit.
had a bit of a play with the car this weekend. Replaced the lower grill slats with an inset mesh, stripped and painted the peeling console trim around the cup holders and debadged.
didn't get time to do the headlights but I did the grill. No plasti-dip. I deconstructed the grill and sanded it back, then primer, gloss black and clear coat. DIY thread to follow.
Before:
After:
I was under time constraints to reassemble so I had to put it back on the car tacky. As a result, right below the star are two chunks of missing paint. I will be able to fix those on the car so stay tuned for a DIY on that also (I guess my mistake will be everyone elses boon )
So driving to work this morning and suddenly the car is revving like crazy and going nowhere. It was still accelerating slowly so I don't think it was slipping clutch packs - felt more like the TC. Turned it off and on again at the lights - problem fixed.
I will have to get it onto a STAR machine and see what codes were thrown.....
Rang the dealer who has been servicing this car - never had a transmission service so that's where I will be starting. 120,000km on original fluid, GAH! This is why I don't work for them any more.
Anyway, to make myself feel better, here are some pics of the freshly debadged rear end. Looks so much wider without the chrome all over it
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
how were you able to know it's similar to a CDI unit? Stock for stock would diesel versions need a larger FMIC?
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Can you post more pictures of the poke from the side? As in, looking down the length of the car from the front and rear?
