Comprehensive Evo STU prep thread?
Is that Dyno below sea-level or what?
I also have a IX but i am no where close to those number on 93oct, but then again I dont have a o2 housing or the 100cell cat.
Maybe the diff in hp is due to the boost creeping of the o2 or just my mod really sucks, lol
Maybe the diff in hp is due to the boost creeping of the o2 or just my mod really sucks, lol
I'm going to a meet tonight and my tuner will be there. I'll see if he can give me a screen capture of my boost/timing/knock for that dyno run and I'll try a post a picture. That run was in done in 4th so if there was any creep I'm sure it will be easy to see.
Which rule is deemed to allow O2 housings in STU? I'm having trouble identifying it. (http://www.scca.org/_filelibrary/Fil...solo_rules.pdf)
Also, has the SEB defined what is meant by a "high flow" cat? Where do you draw the line between something that is essentially a faux cat converter and one that is a functional cat? With these 100 cell cats, do you need to do a CEL fix, or do they actually satisfy the ODD-II system?
Thx.
Also, has the SEB defined what is meant by a "high flow" cat? Where do you draw the line between something that is essentially a faux cat converter and one that is a functional cat? With these 100 cell cats, do you need to do a CEL fix, or do they actually satisfy the ODD-II system?
Thx.
The O2 housing isn't part of the turbo, it's aft of the turbo and is deemed upgradable. Eg: When STi's upgrade their downpipe, it pretty much incorporates the O2 and downpipe into one. The EVO just happens to split the 2 (into an O2 and DP).
Yeah the 100 cell race race is a gray area people are getting away with right now, its almost taking the HFC to the level of test pipes ... wish the rules were a little more clearly defined ... but given the allowed modification the benefit compared to a normal HFC is probably 2-5WHP.
Yeah the 100 cell race race is a gray area people are getting away with right now, its almost taking the HFC to the level of test pipes ... wish the rules were a little more clearly defined ... but given the allowed modification the benefit compared to a normal HFC is probably 2-5WHP.
Last edited by DaWorstPlaya; Jun 19, 2007 at 02:51 PM. Reason: spelling
The O2 housing isn't part of the turbo, it's aft of the turbo and is deemed upgradable. Eg: When STi's upgrade their downpipe, it pretty much incorporates the O2 and downpipe into one. The EVO just happens to split the 2 (into an O2 and DP).
Yeah the 100 cell race race is a gray area people are getting away with right now, it almost taking the HFC to the level of test pipes ... wish the rules were a little more clearly defined ... but given the allowed modification the benefit compared to a normal HFC is probably 2-5WHP.
Yeah the 100 cell race race is a gray area people are getting away with right now, it almost taking the HFC to the level of test pipes ... wish the rules were a little more clearly defined ... but given the allowed modification the benefit compared to a normal HFC is probably 2-5WHP.
As far as calling it basically a test-pipe, I have to disagree. For example, on the dyno day I went to, the first three cars were sans cats and they were popping/smokey/flames/smelly etc. I pulled mine on and ran it with no smell, pops, etc and it was much quieter than the others. It's definitely doing its job.
I'd say any cat in place that enables the car to pass an emissions test is deemed legal for STU.
"The Street Touring category of vehicle modifications is meant to fit
between the current Stock and Street Prepared categories. This
category provides a natural competition outlet for auto enthusiasts
using affordable sports sedans equipped with common suspension,
engine, and appearance modifications which are fully legal and
compatible with street use anywhere in the country."
"The Street Touring category of vehicle modifications is meant to fit
between the current Stock and Street Prepared categories. This
category provides a natural competition outlet for auto enthusiasts
using affordable sports sedans equipped with common suspension,
engine, and appearance modifications which are fully legal and
compatible with street use anywhere in the country."
Last edited by NJ Drive; Jun 19, 2007 at 03:06 PM.
The problem is the emission test isn't defined clearly at a federal level and varies from state to state. California has stricter emissions than Nebraska, etc ... A lot of these HFCs would fail the California state emissions from just a visual perspective ... with that I digress before this turns into a SCCAFORUMs type discussion. 
Well, if you wanted to read into it a little further, being that it says 'modifications which are fully legal and compatible with street use anywhere in the country' I'd say you'd have to abide by the most stringent emissions test that is currently employed in the states. By that wording alone, if it doesn't pass a CA emission test, it's illegal. That's just how I translate it- I agree it should be a little bit more defined.
Not like the thought hasn't run through my head several times... 
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Mike
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That's funny! However, I get my @$$ handed to me on a regular basis (in BSP) by one of the local E30 M3 guys.
Dave