Silver Ecstasy
Member
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- 11 MS3 Sport
Yep, i've got it logging RPM, absTPS, actAFR, Boost/Vacuum, WGDC.
Exhaust - let's talk about this one!
- Thread starter Silver Ecstasy
- Start date
the right tune is probably safer than running the mods you mentioned on the stock maps.
i say this not to start :mad
gun)but to just raise the point that if the right tuner is involved and applies a sensible ATR tune with a dialed in maf and the right fueling you should be right as rain.i think the stock ecu has a hard time with the extra 2-3 lbs of boost that an upgraded intake, intercooler, and exhaust bring because the fuel doesn't come on quick enough at tip in.
just my .02 ... sorry to divert the direction of the thread.
Silver Ecstasy
Member
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- 11 MS3 Sport
I agree with you 100%, but i'm not in the position to spend the extra cash to tune the car to work totally with the car. I guess I should have thought about that prior to modding to begin with, but I can't go back now.
Thanks for the help though!
Thanks for the help though!
Silver Ecstasy
Member
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- 11 MS3 Sport
So I kinda got a weak datalog, 5th to 6th and let off real quick. And I finally got it uploaded.
How do I post it? Or convert it to excel?
*EDIT* here's a bmp ms paint for ya lol.
How do I post it? Or convert it to excel?
*EDIT* here's a bmp ms paint for ya lol.
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Silver Ecstasy
Member
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- 11 MS3 Sport
I'm not sure how to do that? It kept saving as .log.
replacing the cat back from the stock cat back doesnt net you much in the way of tq/hp. i think the net effect on your clutch is minimal...but if it is slipping already its going to still slip with the CBE(drunk)
'
mazdaspeed32007
Member
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- Mazdaspeed3
Thanks for your reply
I need to reduce my boost...
i have a boost leak somewhere in my system...that seems to be working quite well for reducing boost. lol.
H3br3w_Ham3r
Member
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- 2008 Mazdaspeed3
Maybe your investment should be on a new clutch and not exhaust.Thanks for your reply
I need to reduce my boost...
mazdaspeed32007
Member
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- Mazdaspeed3
hey id hate to get off subject here but i just have to say something....i drove cross country and nebraska is just an awful state. it has to be the most boring state ive ever wondered into. i hope you dont take offense. im glad you have a speed3, otherwise id be afraid you might off yoursle ffrom boredom. lol. actually i saw a black speed3 driving through nebraska...i wonder if it was you? it was near a barn at the top of a small hill......vague to the fullest. i just stated all of nebraska. sorry.....go on with the thread.
Why would you think that? The stock CBE has a flow rate higher than the flow rate from the exhaust side of the stock K04 turbo. You can't flow more than the turbo puts out. The stock CBE is that good.
That's the reason there's really no gains to be made from CBE if you are running the stock turbo. Now, the downpipe and race pipe sections are a totally different thing. Both are highly restrictive and form a bottleneck between the turbo exhaust side and the CBE. That's where you can pick up some serious power with a properly bell-mouth shaped downpipe and either catless or high flow catted dp and an open race/test pipe connected to the stock CBE.
CBE changes when running the stock turbo should be for a change in sound, without any expectation of power gain, because it ain't gonna happen that way, IMHO.
BTW, responding to your earlier post question: If you go with the CBE, it will not likely raise boost because it does not increase flow. Aftermarket dp/rp will raise boost by eliminating the restrictions. Expect about 2 psi increase from eliminating the bottleneck.
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1Dopeynutt
Member
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- 2008 Mazdaspeed3
does anyone know anything about the stage 3 kit, that is at the "mazdaspeedstore.com" it list for about $2300.00, they say there is a 61whp gain. kit has 3" dp, 3" rp, 3" cat back, cold air intake, and intercooler. i also worry about what it sounds like.
Darth Vader
Member
Joke. You can get alot of gain for alot less shopping around for those parts and ditching the waste of time catback. They claim 61 wheel, without a tuning device? Dream on.
Ok, on stock tune gain is minimal, but have you already tried on 18psi or more with custom tune. I think you can slittly increase boost in higher rpm with a 3" cbe.
Look at this article, the gain from Vibrand 3" CBE (with catted TP) is not as minimal that you said. Is more than the donwpipe alone!
http://www.importtuner.com/powerpages/impp_0811_2008_mazdaspeed_3/index.html
I've dynoed my TP before/after dyno and got 10hp (about 6whp), with CBE, I should get the same gain in higher rpm, and a lit a bit more with custom tune.
With donwpipe (Corksport for example), the gain is high in mid-range but not as high in higher rpm.
One more thing, I've seen CBE for MS3 and MPS (European) is different. We have have a big muffler.
I cannot speak to any differences in Eurospec CBE on the Speed3. If you have a bigger/different muffler, then the flow rate may, indeed, be different and there may be some gains to be made there for a CBE in that set up.
Those of us driving US spec MS3's are not finding any gains, or such small ones that they do not seem to justify the high cost of a quality CBE unless we are looking for a different sound.
Running my particular catless 3 inch dp/rp into the stock CBE, I am already seeing 17-18 psi at WOT under load at 5,500 rpm. This is one of the desirable side effects of catless dp/rp's. I really can't use more boost, and would not want to go above 18 psi on this turbo even with a tune.
As to CBE and tune, I'm not tuned, so I can't address the issue beyond repeating that if a CBE (at least the US one), flows better than the maximum output rate of the K04 turbo, attaching a different one will only change the sound. You can't tune beyond the capabilities of the K04 turbo, which maxes out pretty much at 18-19 psi. Maybe if you get the car a little above 300 whp, which is barely possible with every bolt on except a turbo change out, you might see a slight gain on the American version. With our cars, the restriction is upstream, the stock downpipe and the two cats.
I understand that there are some slight gains to be made on the American MS6 because it does seem to have a slightly more restrictive exhaust. This may be true for your Euro Speed3.
Sounds like you really want the CBE you found. For gosh sakes, don't let me or anyone on the board talk you out of what you have your heart set on. If it were me, and you were asking us the questions, I'd put the money into a catted or catless dp in front of your test pipe and fix the problem at the point of the restriction, but that's just me.
Those of us driving US spec MS3's are not finding any gains, or such small ones that they do not seem to justify the high cost of a quality CBE unless we are looking for a different sound.
Running my particular catless 3 inch dp/rp into the stock CBE, I am already seeing 17-18 psi at WOT under load at 5,500 rpm. This is one of the desirable side effects of catless dp/rp's. I really can't use more boost, and would not want to go above 18 psi on this turbo even with a tune.
As to CBE and tune, I'm not tuned, so I can't address the issue beyond repeating that if a CBE (at least the US one), flows better than the maximum output rate of the K04 turbo, attaching a different one will only change the sound. You can't tune beyond the capabilities of the K04 turbo, which maxes out pretty much at 18-19 psi. Maybe if you get the car a little above 300 whp, which is barely possible with every bolt on except a turbo change out, you might see a slight gain on the American version. With our cars, the restriction is upstream, the stock downpipe and the two cats.
I understand that there are some slight gains to be made on the American MS6 because it does seem to have a slightly more restrictive exhaust. This may be true for your Euro Speed3.
Sounds like you really want the CBE you found. For gosh sakes, don't let me or anyone on the board talk you out of what you have your heart set on. If it were me, and you were asking us the questions, I'd put the money into a catted or catless dp in front of your test pipe and fix the problem at the point of the restriction, but that's just me.
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