How much IAT reduction does a good FMIC have?

SuperBmw · 08-01-2012, 04:02 PM

Let's say for example ambient temps are 90-95F and you are doing some quick WOT pulls, how much of a reduction in IAT versus stock would be considered a good intercooler and how much great?

Looking at just cooling, not other aspects.

I noticed most intercoolers are giving between 15-25 depending on the size, is that what should be targeted?

marv85 · 08-01-2012, 06:26 PM

it is more of consistency rather than absolute reduction. In other words, you'll see less increase in IAT throughout a pull, and faster recovery after a pull.

with my ETS 7", I barely see an increase in IATs throughout a 3rd gear pull while with the stock intercooler I use to see more than 30F increase sometimes...

ar design II · 08-01-2012, 06:39 PM

Quote:

Originally Posted by marv85

it is more of consistency rather than absolute reduction. In other words, you'll see less increase in IAT throughout a pull, and faster recovery after a pull.

with my ETS 7", I abrely see an increase in IATs throughout a 3rd gear pull while with the stock intercooler I use to see more than 30 sometimes...

+1, one of the best mods you can do starting out.

Dr. G · 08-01-2012, 10:16 PM

Hitting 140-145 on stock IC vs. barely hitting 100 on aftermarket sounds good.

messi · 08-02-2012, 06:27 AM

I think this is definitely gonna be my next mod. I don't track my car just basically a weekend warrior but avg temps here are 33 Celsius during the day here. Would this allow me to run stage 1 map Vishnu maps. I currently run stage 0.

BMWsky · 08-02-2012, 09:50 AM

The idea of an aftermarket FMIC isn't geared towards a few quick pulls, but rather keeping the IAT's down during sustained driving. For example, if you're ever out on a road course, initially all is fine. After pushing the car hard for even a couple of laps you'll start to feel the "bog". With an aftermarket FMIC you'll get better airflow to the turbos, cooler temps, and MUCH faster recovery post shift. You could gain cooler IAT's with meth than you'll ever get with an FMIC, but even then the less restrictive airflow from the upgraded FMIC with meth would still be worth it IMO.

M3 Eater · 08-02-2012, 09:53 AM

90-100 degrees at wot through 3rd and 4th. Down from 120-130

A418t81 · 08-02-2012, 06:24 PM

Frankly on my last 335, I noticed a much bigger difference adding the FMIC than I did the 3" catless downpipes. The FMIC needs to be the first mod after a tune, IMO. 150 deg intake temps are absurd. The car smoothed out and made a lot more power, 27 whp over the stock unit on the same dyno in nearly identical conditions.

08-01-2012, 04:02 PM	#1
SuperBmw Lieutenant 68 Rep 511 Posts Drives: 07 E92 335i Join Date: Dec 2010 Location: Toronto iTrader: (5)	How much IAT reduction does a good FMIC have? Let's say for example ambient temps are 90-95F and you are doing some quick WOT pulls, how much of a reduction in IAT versus stock would be considered a good intercooler and how much great? Looking at just cooling, not other aspects. I noticed most intercoolers are giving between 15-25 depending on the size, is that what should be targeted?
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08-01-2012, 06:26 PM	#2
marv85 Colonel 70 Rep 2,626 Posts Drives: '07 E92 335i MT Join Date: Jun 2010 Location: Bay Area iTrader: (7)	it is more of consistency rather than absolute reduction. In other words, you'll see less increase in IAT throughout a pull, and faster recovery after a pull. with my ETS 7", I barely see an increase in IATs throughout a 3rd gear pull while with the stock intercooler I use to see more than 30F increase sometimes... __________________ '18 F80 M3 Comp 6MT - Stock '07 E92 335i 6MT- HP650, inlets/outlets, ER FMIC, VRSF CP, LPFP stg2, CSF rad, 'is Aux rad, ER OC, Ohlins, M control arms, eibach front sway bar. '05 C55 AMG SOLD - '22 Tesla M3P \| '10 E92 335i M, 6MT \| '07 E90 335i, PTF COBB E50, FBO, HFS4 Last edited by marv85; 08-01-2012 at 08:24 PM..
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08-01-2012, 10:16 PM	#4
Dr. G Major General 278 Rep 5,063 Posts Drives: Black e92 335i Join Date: Apr 2010 Location: Brampton, Ontario iTrader: (32) Garage List e92 BMW 335i [8.84]	Hitting 140-145 on stock IC vs. barely hitting 100 on aftermarket sounds good. __________________ JB4 / OSS Angel Eyes / Downpipes / F1-Racewerks FMIC / Custom Meth Kit / BMS DCI / ER Chargepipe / HKS BOV / BMS Meth Elbow / BMW Performance Exhaust / Carbon Fiber Inlay Quad Tips / 19" Miro 111 / Front Aero Lip / M3 Sides / VRS CSL Trunk / Mtech Rear / DD CF Quad Finned Diffuser / LCI Tails / BBK / Smoked Reflectors / F1 Euphoria LED Interior / License LED's / GT 5000k Corners / 5000k HID Fogs / Air Scoops / LED Turn Signals / FK Silverline Coilovers / HPA endlinks / Vibrant Resonators / Osram CBI 5000k D1S
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08-02-2012, 06:27 AM	#5
messi First Lieutenant 15 Rep 368 Posts Drives: 2009 E92 335i MSport Coupe 6AT Join Date: Jun 2011 Location: Trinidad iTrader: (1)	I think this is definitely gonna be my next mod. I don't track my car just basically a weekend warrior but avg temps here are 33 Celsius during the day here. Would this allow me to run stage 1 map Vishnu maps. I currently run stage 0.
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08-02-2012, 09:50 AM	#6
BMWsky Major 24 Rep 1,244 Posts Drives: 335i Join Date: Dec 2010 Location: Webster NY iTrader: (1)	The idea of an aftermarket FMIC isn't geared towards a few quick pulls, but rather keeping the IAT's down during sustained driving. For example, if you're ever out on a road course, initially all is fine. After pushing the car hard for even a couple of laps you'll start to feel the "bog". With an aftermarket FMIC you'll get better airflow to the turbos, cooler temps, and MUCH faster recovery post shift. You could gain cooler IAT's with meth than you'll ever get with an FMIC, but even then the less restrictive airflow from the upgraded FMIC with meth would still be worth it IMO.
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08-02-2012, 09:53 AM	#7
M3 Eater Major 36 Rep 1,054 Posts Drives: 335i Sedan Join Date: May 2010 Location: Unknown iTrader: (3) Garage List 2007 335i [0.00]	90-100 degrees at wot through 3rd and 4th. Down from 120-130 __________________ JB4 beta 15 ohms FSB,AEM inline filter/ CM 10, ETS fmic, ER custom made charge pipe,TSW Donnington 18's,Simitumo HTRZ3, Injen DCI, AR DPs, Forge DVs, AA SLD, Koni FSD, ZSP springs.
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08-02-2012, 06:24 PM	#8
A418t81 Lieutenant Colonel 318 Rep 1,517 Posts Drives: Ever changing fleet Join Date: May 2007 Location: Alabama iTrader: (1) Garage List 2013 335is [0.00]	Frankly on my last 335, I noticed a much bigger difference adding the FMIC than I did the 3" catless downpipes. The FMIC needs to be the first mod after a tune, IMO. 150 deg intake temps are absurd. The car smoothed out and made a lot more power, 27 whp over the stock unit on the same dyno in nearly identical conditions. __________________ 23 iX M60, 24 GT3 RS Weissach, 22 Rivian R1T, 23 RS3, 13 E92 M3 Competition: Akra Evo, KW V3, etc
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