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10-14-2019, 10:44 AM | #1 |
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FMIC upgrade suggestions
I have upgraded almost my entire air system from the CAI to the exhaust. My first upgrade was a Wagner low end FMIC. Now I'm approaching 500hp and I think I need to upgrade to a better FMIC. Appreciate any and all suggestions.
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10-19-2019, 04:08 PM | #2 |
Captain
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VRSF 7.5 race
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10-26-2019, 07:03 AM | #3 |
Captain
90
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Do some iat logs to de determine if you need a larger FMIC. Imho most larger FMICs are more than OK for the street. You only really need the tall FMICs if you do continuous WOT pulls, like you would on track. I have tried VRSF 7 / 7HD / 7.5HD and ER competition (modified to work with larger radiator on my Z4). On the street all of them performed the same. It is only when driving on track that the 7 starts to heat soak like crazy. Im at 450hp max.
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11-02-2019, 12:40 PM | #4 |
First Lieutenant
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Rep 370
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VRSF 7.5 Race... My IAT's pretty much don't increase at all on 3rd gear pulls... and when I race 1/2 mile events, my IAT's don't even go up 10 degrees on a 160+mph run from a dig on an 80+ degree day
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2009 Z4 35i 6mt, SpeedTech 6266 Gen2 turbo kit, Tial WG, VRSF 7.5 race IC, ER charge pipe, Tial BOV, Radium Fuel cell w/ surge tank and twin Walbro 525 pumps, Radium FPR and return line, Bluetooth ethanol sensor, Phoenix intake manifold w/PI, JB4 tuner, PR coil packs, Custom oil cooler, ECS Radiator, Spec 3+clutch, Mfactory flywheel, single 3.5" into dual 3" exhaust, H&R springs, 19" TSW wheels, 235/19 & 275/19 RE11 tires
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11-16-2019, 08:24 AM | #6 |
Captain
90
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I havent noticed any such difference with the four FMICs I have tried. But I can immediately feel the difference in response when I add and remove cats to the exhaust. Both mid-cats and down-pipe cats.
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12-03-2019, 06:54 PM | #7 |
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Drives: BMW E89 Z4 sDrive 35i
Join Date: Oct 2019
Location: Hong Kong, CHINA
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at last i have Wagner Evo2 Competition intercooler, VRSF cat-less downpipes and MHD Stage2+ installed. just as you have mentioned no negative effect (lag or slow response) and the performance improvement is HUGE.
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12-06-2019, 12:43 AM | #8 |
Captain
90
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Thats great news. How is the fuel in HK? Did you do any logs with mhd, such as 3rd gear wot log from 2500-6500rpm on flat road? Would love to see a datazap link if you have.
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