12-07-2020, 04:18 PM | #89 |
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You are stock 6 speed manual.... That tranny will grenade at around 450-500WTRQ if you want to do any sort of launching... It will hold up to roll racing though. Also the 6 speed has beefier shafts 36mm I believe, so they are the same as the 335i already. The N20/N26 Auto boys have 32mm shafts which are weaker then the 335i (36mm).
As for fueling, the HPFP will get you soo far. If you want to run any sort of blends of E85 I would just go with Port Injection and upgrade the LPFP and have any sort of fuel you want with the ability to swap out injector sizes etc. As for turbo. It's a shame you are building the motor but not the turbo... Spend the extra money and get a manifold, downpipe and the boost pipe done and call it a day rather then trying to cut and weld other turbos to fit... Also for your clutch, I would strongly suggest you get the 335I NON SSA Pressure Plate and get yourself a puck clutch otherwise you will be going through clutches every year. If you do decide to upgrade the trans: F30 335I Shift arm (Holds the shifter assembly from the trans to the chassis) F30 Gear shift selector rod. E90/E92 335I N54 trans (6 Bolt flywheel version) N54 (6 bolt) DKM Twin disk clutch/ flywheel combo. Auto or the Manual 335I drive shaft from an F30 car. F30 335I Factory LSD (3.15 Ratio) or Manual 335i diff (3.25 Open carrier). The ratio wont make any noticeable change in rpm or speed as it's too small of a difference. But higher ratio will get you a more peppier car.
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2012 F30: G25-660 Bottom Mount Mani+ DP+ Intake, CSF FMIC, VRSF CP, Walbro 450 LPFP, PR Injection with AIC 4, S63TU Injectors, Tuned with BM3, ZF Race 4 Puck and Non SSA Pressure plate, Catless, 3.5" Quad Muffler, Custom Valved Bilstein B8 + H&R SS. Max 456 WHP - 452 WTRQ. Currently tuned down to 434 WHP and 362 WTRQ to save the rods.
Last edited by D041987; 12-07-2020 at 04:45 PM.. |
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12-07-2020, 05:24 PM | #90 | |
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12-07-2020, 09:32 PM | #91 | |
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12-13-2020, 11:19 PM | #93 |
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So I've been trying to figure out solutions for the hpfp and I think I found a way to use the supra tu pump. Disconnected the main line to the fuel rail, I also found a company that would make a custom hpfp hard fuel lines/s, the only thing would be if the supra hpfp would physically fit in the same location as our stock hpfp fuel pump. Almost finished with upgrading the stock lpfp too.
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12-13-2020, 11:22 PM | #94 |
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Also had someone 3d print the vortech v3 centrifugal supercharger compressor side, so I can start doing measurements on where would be the best fit for it. I might have to go with rotrex if its too big though
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12-15-2020, 07:09 AM | #95 | |
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http://spoolperformance.us/index.php...product_id=105 The B58TU (from the Supra) is the only stock HPFP that is considered an upgrade to the N20, it does fit and will bolt into the housing and connect to the harness with minor adjustments. However the inlet and outlet ports on the pump face different orientations to the stock N20 pump. meaning custom Hard HPFP lines need to be made. Considering most of those A90 Supra HPFP's go for close to what the Spool FX150 is selling for, then you add the cost of the additional parts to get the B58TU HPFP to work. It would be cheaper to just buy the Spool FX150 and have the tune flashed with new HPFP calibration data. Alternatively Port injection kits already exist for the N20 which are cheaper than a HPFP upgrade. |
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12-21-2020, 12:30 AM | #96 | |
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I'm very interested in this process. Best of luck Kel and awesome help thus far navardi |
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12-21-2020, 04:54 PM | #97 |
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I think I’m going to go with the supra tu pump, I found it for $820 brand new online from a Toyota dealer, and bms has a wire harness extension for only $42. I contacted a company who builds hard fuel lines and they said they can make the line for me. I would probably buy like 10 or more for others who might want to go that route. I looked at the spool hpfp but they want $1,399 for it. I’m hoping to find a used b58 tu pump like this guy on YouTube did and save money
Last edited by Kel918; 12-25-2020 at 09:47 PM.. |
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12-21-2020, 04:55 PM | #98 |
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12-27-2020, 01:18 AM | #100 | |
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FWIW the pump stroke on the N20 is around 4.6mm. I assume I measured it wrong, and is really 4.7mm, in which case it matches the N55 exactly. If true that means the N20 fuel system can flow as much fuel per revolution as the N55, even though it only has 2/3 the number of injectors (meaning each N20 injector can inject 1.5x as much fuel as an N55 injector). |
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12-27-2020, 06:25 AM | #101 | |
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PI/CPI needs an external "piggyback" style controller, you can use the JB4 + BMS PI controller or FSB Controller instead of the BMS PI. Or you can use the Split Second "flash only" controller. TBH I prefer to work with the split second as it doesn't interfere with the ecu flash and datalogging capabilities of Bootmod3 tunes (or any other tune for that matter). HPFP upgrades, can be controlled by factory ECU with some changes to the tune |
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12-27-2020, 06:30 AM | #102 | |
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N20 HPFP caps out around 42lbs/min of airflow on 93(somewhere in the 420-460 crank HP range based on low reading dyno). But N20 HPFP crashes hard on E50 mixes and above on a stock turbo setup, so having something to provide more fuel is pretty important. I actually provided abit of a write up on this if ya'll interested. https://navardituned.com.au/blogs/th...pfp-capability |
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12-27-2020, 06:33 AM | #103 | |
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All you need to do now is get it to fit onto the engine, which shouldn't require too much work. |
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12-27-2020, 09:29 AM | #104 | |
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01-05-2021, 05:19 AM | #105 | |
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I don't think you quite understood what I was trying to say before regarding more boost etc. the Stock N55 Turbo flows 41-42lbs/min on 18-20PSI because the N55 has a displacement of 3L plus its a 6CYL, so it places the compressor wheel of the turbo in a different part of the compressor map, on the N20 being 2L and 4 CYL you are required to run higher boost to get the turbo to flow the same 41-42lbs/min. I mean you just built the engine, so 30+ PSI shouldn't be a worry at all. A turbo that large wouldn't hit 26PSI till 4K rpm anyways, like all big turbo cars there will be some turbo lag over stock but a perfect tune can help eliminate that as the DME has lots of tables around Spooling etc that can be manipulated to help spool the turbo really fast. feel free to DM me if you want any help TLDR: You will find out the hard way that without running that Turbo on a 4CYL at higher boost you won't make alot of power/flow alot of air over stock turbo. If you want to understand the science behind it use this tool https://www.borgwarner.com/matchbot/...6_wrsin=92044& |
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01-11-2021, 06:17 PM | #106 |
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finished setting up the timing for the engine, next is getting the turbo sorted out. Btw if you want to use the n55 stock turbo, the manifold would not physically fit even if you cut the extra 2 cylinders off. The only option is to cut it from the exhaust manifold and adapt it to the n20 exhaust manifold.
Last edited by Kel918; 01-21-2021 at 11:18 AM.. |
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01-14-2021, 03:10 AM | #108 |
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I did change the sprocket to the new version from bmw, also new oil pump, oil pump chain. As long as you have all the tools to set the timing it's pretty easy
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