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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?
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      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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      06-14-2009, 09:13 PM   #3
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Quote:
Originally Posted by hun77777 View Post
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...
I still have the other set of cats. Also, 91 octane freaks me out.

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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Quote:
Originally Posted by shiv@vishnu View Post
Stg 1-- stock and mild bolt-on (intake, cat-back, dps, etc,.)
Stg 2-- intake and no cats
Stg 3-- intake, no cats and FMIC

There is some flexibility with those requirements of course. Just don't use a map that is too aggressive for your mods.

Shiv
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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Quote:
Originally Posted by Vudoo4u2 View Post
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
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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Quote:
Originally Posted by scottp999 View Post
Do some datalogging of stage 2 and stage 3. High flow cats flow at about double the CFM of stock.
Are there such things as high flow cats for the secondary cats (not the DP cats) ? If so, I'm down.

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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Quote:
Originally Posted by Slidewayz View Post
Are there such things as high flow cats for the secondary cats (not the DP cats) ? If so, I'm down.

I've asked the question before and received deafening silence as a reply.
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?

Quote:
Originally Posted by ontopofm View Post
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, 01:21 AM   #10
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I got them from here for $178 shipped http://www.performancepeddler.com/de...D=MAG59955#img



Quote:
Originally Posted by Slidewayz View Post
Thx.

Where did you get the high flow cats? Brand? Website? Price?
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      06-15-2009, 05:15 AM   #11
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cats are cheaper than i thought.
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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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Quote:
Originally Posted by scottp999 View Post
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
i bought the 59956 which is 2.36" but it is larger the oem pipe, the 59955 is exact fit.
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      06-15-2009, 10:14 AM   #14
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Quote:
Originally Posted by ontopofm View Post
i bought the 59956 which is 2.36" but it is larger the oem pipe, the 59955 is exact fit.
Great info!

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, 05:20 PM   #15
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Soooooooooo, anyone with DCI, catless DPs, and Helix IC running a Stage III map with 91 octane

...I'm tempted to try it with UT turned down a bit.
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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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Don't you get 92 octane in Oregon?


Quote:
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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, 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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Quote:
Originally Posted by Slidewayz View Post
Don't you get 92 octane in Oregon?
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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      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 ?

Quote:
Originally Posted by cstmx_ryder View Post
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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      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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      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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