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03-13-2018, 12:41 PM | #1 |
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Help with alpina turbos
So I received the ebay alpinas and had one diverter valve bad as soon as I installed. I swapped with one out of my Garrett 2256, the stock n63 turbo, and got it driving but the boost between banks is insane. Bank one with my 2256 diverter valve is right on target, but bank 2 is anywhere from 3-6 psi higher. I marked the wastegate and tried to get closer but ran out of room on the rod to loosen it. Could it really be the diverter valve causing this, I assumed it played no part until releasing boost when you let off the throttle. I have two new ones on the way, but the only issue I have is the imbalance. I went to make the diverters matching from my old turbos and find my second diverter valve ripped to shreds. I bet that’s why I could never get my boost up like I could a year ago. Any advice?
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03-13-2018, 11:59 PM | #2 | |
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03-15-2018, 09:51 PM | #4 |
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2012 with diverter valves. Turns out both my old turbos diverter valves were shot and I missed it at midnight installing it. A new diverter valve in the alpinas and I’m only a few psi off. It feels insane now, so much more power. The case is 2259 so I assume still 59 or 60mm impeller.
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03-16-2018, 04:06 AM | #5 |
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Just wanting to confirm, are your alpina turbos the same as this listing :
https://www.ebay.com/itm/Right-Turbo...1aowq0&vxp=mtr or this one : https://www.ebay.com/itm/Turbocharge...FZn7YC&vxp=mtr The second one is the bigger turbo with a much bigger diverter/blow off valve. First one looks like a stock N63 Diverter. |
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03-16-2018, 10:39 AM | #7 |
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Serg tuned it but for stock turbos not these. I have jb4 but still on map 0. Both turbos are the same I think when I checked part numbers. My diverter valves are huge compared to n63, I ordered a pair for both turbos.
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03-16-2018, 01:23 PM | #8 |
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So i looked and it seems the alpina blowoff valve is essenstially a beefier diverted valve. The function is the same : to send excess air back to intake side. I’ll read up on Serg’ s tune. My car is a daily so shipping DME is a concern. Did dinan ever really tune the n63 or just released the dinantronics piggy back system?
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03-16-2018, 08:00 PM | #10 |
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just need more time on track and you will be in 11's
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03-17-2018, 10:22 PM | #12 |
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So you weren’t able to TUNE the upgraded Alpina B5 (803709-0007) Turbo’s-Is that correct?
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03-19-2018, 12:26 AM | #14 | |
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The TU gets the dinantronics system. |
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03-19-2018, 12:01 PM | #15 |
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How much HP/TQ does stage produce in comparison to JB4 Beta + BCM?
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03-19-2018, 01:24 PM | #16 |
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nothing dinan can compare to JB4 even stage 1
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03-19-2018, 03:18 PM | #18 |
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542/587 for stage 6
521/585 for stage 5 Not a huge difference in peak numbers, but I believe the curve was good all the way. The ideal to me would be Stage 6 for daily use, and a JB4 to manipulate 3.5Bar sensors, and have the ability to go wild when needed.
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2011 Space Grey 550i - Eisenmann exhaust, ACS Springs, Dinan Intercoolers, Intake, & Stage 5 tune
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03-19-2018, 09:12 PM | #20 |
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03-19-2018, 09:17 PM | #21 |
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pull out the turbos then
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