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New Member
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Posts: 10
Join Date: Nov 2020
Car: E92
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jb4 or hobbs switch for now? -
12-05-2020, 08:14 AM
I'm just getting out to the barn working on the 335 and going over my logs from last night I noticed my stage 3 LPFP pressure was dipping real low, currently I have my secondary walbro 450 hooked up to a hobbs switch at 15psi and it doesn't seem to have been triggered. Im pretty sure it was a crap relay when id cross the hobbs it would take 3-4 times triggering it for the pump to kick on. I just swapped it out for a oem relay and can go out and run some logs or my question is; I'm in the process of doing a st conversion and have a already installed the pi and have the jb4 pi controller sitting in the box. Do I wait on the pi controller and keep running the hobbs or is it worth hooking it up on stock turbos running a bef on mhd with stock twins? Im already on a e85 bef running e60
just wondering if there's any cons as I could wrap this project up and go play 😎
again thanks for any feedback
Justin
2009 BMW 335I MSport 6MT N54, 18" Avant Garde M359, Akrym CF FL, MHD/JB4 e85 bef, Anti-Lag/2step & PI Controller, Stage 3 Twin Walbro 450's Bucketed 15PSI HOBBS Switch, VRSF 7" FMIC, DCI, VTT Chargepipe, ** DP, Straight Piped, TIAL BOV, 3.5Bar TMAP, RB PCV, Catch Can, Precision Race Coils, Index 12 Inj, 2Step colder NGK Iridium, BMP PI(TBI), DOCRace Top Mount GTW6465R(TBI), 535I Clutch, Removed CDV, Weighted short Shifter, MFactory SM Flywheel(TBI), M3 F/R Control Arms, BCRacing Adj Coilovers.
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New Member
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Posts: 10
Join Date: Nov 2020
Car: E92
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12-05-2020, 09:14 AM
my hobbs isn't triggering until 20psi and it won't adjust any lower, scratching the hobbs and hooking up jb4 pi controller with bef on mhd.
2009 BMW 335I MSport 6MT N54, 18" Avant Garde M359, Akrym CF FL, MHD/JB4 e85 bef, Anti-Lag/2step & PI Controller, Stage 3 Twin Walbro 450's Bucketed 15PSI HOBBS Switch, VRSF 7" FMIC, DCI, VTT Chargepipe, ** DP, Straight Piped, TIAL BOV, 3.5Bar TMAP, RB PCV, Catch Can, Precision Race Coils, Index 12 Inj, 2Step colder NGK Iridium, BMP PI(TBI), DOCRace Top Mount GTW6465R(TBI), 535I Clutch, Removed CDV, Weighted short Shifter, MFactory SM Flywheel(TBI), M3 F/R Control Arms, BCRacing Adj Coilovers.
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