07-10-2014, 02:46 PM | #1 |
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BMW 1M Single Turbo Build
Featured on BIMMERPOST.com Here's a dyno sheet on my local dyno. Note they use a correction factor due to the high altitude. So I'm guessing around 620-650whp. Im using a clutchmasters 850r cause the stock clutch couldnt hold. For tuning Im jb4 g5 with st firmware and backened flash. Currently on meth and around e20. The 4 injectors on the charge pipe are there cause Im switching to full e100 which we have available where I live. So I've added the 4 extra injectors and a separate fuel controller to deal. Not working yet!! But hopefully soon!!!! The turbo is amazing. And I've added a Tial housing for the compressor to quicken up spool a bit... |
07-10-2014, 03:18 PM | #2 |
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Holy crap that's a big turbo. What are you targeting, ~600 hp at the wheels? What RPM do you spool at now?
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07-10-2014, 03:28 PM | #3 |
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Wow! That looks like a serious setup!
Some questions: -Any dyno charts? -What are those 4 injectors on your charge pipe? -How is the tuning managed? Tuned OEM DME, or some sort of standalone system? Great work, by the way!
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07-10-2014, 03:28 PM | #4 |
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That's a great choice for the motor OP, you'll comfortably clear 600 wheel assuming octane and fuel are there. What metal did you use for the manifold? SCH10?
Edit: and is that Port fueling you've set up? Any reasons as to why you are spraying pre-TB with that much fuel? Are you batch firing - regardless how are you controlling that? Ah so many questions!
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07-10-2014, 04:13 PM | #7 | |
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So for example VTT is coming with twins. Is that what you mean by twin turbos? Or are we just talking stock frame twins.
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07-10-2014, 04:20 PM | #9 | |
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Twin GTX35s
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07-10-2014, 04:21 PM | #10 |
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Stock frame turbos run out of breath up top (though they spool-up very quickly down low). They are also "journal bearing" turbos and are not as robust as turbos using ball bearings!
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07-10-2014, 04:38 PM | #11 |
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Here's a dyno sheet on my local dyno. Note they use a correction factor due to the high altitude. So I'm guessing around 620-650whp. Im using a clutchmasters 850r cause the stock clutch couldnt hold. For tuning Im jb4 g5 with st firmware and backened flash. Currently on meth and around e20. The 4 injectors on the charge pipe are there cause Im switching to full e100 which we have available where I live. So I've added the 4 extra injectors and a separate fuel controller to deal. Not working yet!! But hopefully soon!!!! The turbo is amazing. And I've added a Tial housing for the compressor to quicken up spool a bit...
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07-10-2014, 04:39 PM | #12 | ||
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07-10-2014, 04:45 PM | #13 |
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@Alexim when you get the fuel crank up the boost! That turbo has a ton of headroom left in it. Nicely done man.
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07-10-2014, 04:50 PM | #14 | |
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07-10-2014, 04:56 PM | #15 |
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What tires are you running? 4th gear, 100-130 mph is probably pretty good...
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07-10-2014, 04:57 PM | #16 | |
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07-10-2014, 05:32 PM | #17 |
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At nearly double stock power? I suspect it's hilarious!
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07-11-2014, 07:01 AM | #21 |
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It sort of is man... I tracked it last year on pouring rain and it was just ridiculous... Even on the dry it VERY tail happy once it kicks in... But it's manageable and quite fun once you get used to the power...
It really is quite a lot for such a short wheelbase, would've been better on a 335i I suspect, but I love this car and am very satisfied!!! |
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07-11-2014, 07:02 AM | #22 |
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The guys over at burger ran at around 25 or 26 psi on a ST n54, so I think it can hold for a while... Maybe in a couple of months I'll open up the engine and forge the pistons, rods, etc... But for now it seems to hold pretty well
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