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Helix IC installed
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06-14-2009, 08:41 PM | #1 |
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Helix IC installed
I am in the Bay Area, CA, home of the un-finest faux 91 octane.
My mods are PROcede CANBUS, catless DPs, DCI, and now a Helix IC. I was running a Stage II map w/UT set to 76%. I've just bumped that up to 79% to see if it still feels strong. So far, so good. It didn't get too hot today and I think I need to drive a little more to educate the ECU, but think I can do a full Stage II with the upgraded FMIC. Has anyone else in the 91 octane zone w/the same mods tried a full Stage II (80% UT) or a de-tuned Stage III with good results? |
06-14-2009, 08:56 PM | #2 |
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shouldn't you run stage III with dps and ic? that's what i've been told. stage I for tune/DCI, II for dps exhaust, III for all of above + IC...
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SGE92TT......................... 12.331 Sec @ 117.89 Mph............................POWERED BY
l BMS DCI l HELIX IC l FORGE DVs l RR OCC & CP & SCOOPS l AR 3" DPs l AE QUADs l BLISTEIN PSS10 l P3 VENT GUAGE l VISHNU PROCEDE V5 AUTOTUNE l Lots of Window Stickers |
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06-14-2009, 09:13 PM | #3 | |
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I went through 3 engines with my RX-8, so I am erring on the side of caution. Maybe Shiv can shed some light on this... |
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06-14-2009, 09:25 PM | #4 |
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simple:
if you arent catless, run stage 2 if you ARE catless, run stage 3 even if you have exhaust and downpipes, but your exhaust has HFC's or your downpipes do...those count as a catalytic converter, so..stage 2
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06-14-2009, 09:32 PM | #5 |
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Do some datalogging of stage 2 and stage 3. High flow cats flow at about double the CFM of stock.
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06-14-2009, 09:32 PM | #6 |
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I don't know that it's so simple. Shiv's recommendations don't factor in an upgraded FMIC or quasi-catless ops.
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06-14-2009, 11:32 PM | #7 | |
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I've asked the question before and received deafening silence as a reply. |
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06-15-2009, 01:00 AM | #8 |
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I replaced the 2ndary cats with have high flow cats. I tried stage 3, then stage 2 but didnt seem any faster or I wasnt comfortable with those maps, so i went back to stage 1 which feel just right. I didnt do any log though. BTW, I have Rev I.
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06-15-2009, 01:10 AM | #9 |
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Thx.
Where did you get the high flow cats? Brand? Website? Price? |
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06-15-2009, 01:21 AM | #10 |
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06-15-2009, 07:48 AM | #12 |
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magnaflow 59995 looks like 2.25" which is probably good for a stock system (which is 2.36"), 59956 is 2.5" for most aftermarket catbacks, and then 59959 @ 3" is what AR Design uses in their downpipes.
http://www.car-sound.com/02product/u...al/599spun.asp |
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06-15-2009, 10:07 AM | #13 | |
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06-15-2009, 10:14 AM | #14 | |
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This was a little test table that I found somewhere on the internet a couple of weeks ago. I believe it says that unrestricted, under the test configuration the pipe will do 1000 CFM, with some stock cats 300 CFM, and with Hi Flow, Spun Metallic 600 CFM: |
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06-15-2009, 05:28 PM | #16 |
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I have similar mods as you, also on stock exhaust, and I'm running Stg3 @ default value. I think it's 90%? Everything's running great, pulls hard above 100mph. BTW, I have Rev.I with the 5-29 map.
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06-15-2009, 05:55 PM | #17 |
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06-15-2009, 06:00 PM | #18 |
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i'm running stage 2 with FMIC, tune and DCI. I have one map set at 75% UT and the other one default at 80%. The default setting seems to pull harder and no problems so far. Once i get DPs, i plan on trying map 3.
oh and I have all 4 stock cats still. |
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06-15-2009, 06:03 PM | #19 |
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Yes, but I think you'll be okay with 91 oct......I doubt that 1 oct point would be the deal breaker, if you know what I mean.........Unless you guys have REALLY SHITTY gas down there, which I wouldn't know anything about.
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'08 AW E90 335i PROcede V5 | BMS DCI | RR DPs | ETS FMIC | FORGE DVs | Stett CP | Vanguard | PSS10 |
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06-15-2009, 06:15 PM | #20 |
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1 octane point does make a difference. Also, our gas (at least in the Bay area) is really bad.
What UT are you using with Stage III ? |
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06-15-2009, 06:20 PM | #21 |
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How many HP does 1 oct point equal to? ~2-3 hp? IDK, you should try it, doubt that it'll throw a code, maybe, maybe not.......
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'08 AW E90 335i PROcede V5 | BMS DCI | RR DPs | ETS FMIC | FORGE DVs | Stett CP | Vanguard | PSS10 |
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06-15-2009, 07:06 PM | #22 |
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I just tried Stage III with UT set to 79%.
No codes, and it feels better than Stage II w/ UT set to 79%. It's not a hot day, though. Octane is a measure of knock resistance. Especially on turbo cars, every point helps. It's also not totally linear...it's not x HP / octane point. |
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