20psi on mazdaspeed 6???

buit9110 · Jun 9, 2006

nice! i can't wait till you post the video.

MS6freek · Jun 9, 2006

buit9110 said:
nice! i can't wait till you post the video.

here it is boys and girlzzzzzzzzz (first)

http://s80.photobucket.com/albums/j...rrent=mazdaspeed6boosttestwboostcontrolle.flv

crossbow · Jun 9, 2006

It's not the engine that's the problem. It's the clutch/drivetrain. There have already been cases of shattered clutches (mainly from owners trying to launch a car that's not designed to be launched), that have resulted in warranty denial. (It's quite obvious why the clutch exploded).

MAZDASPEED619 · Jun 9, 2006

hell yah i cant wait either. if this is true then im takin my hallman boost controller off the talon and tryin it on the MS6!!!

Jeph · Jun 9, 2006

I don't think 18 psi would be bad on the MS6. For a car with 15 psi stock it doesn't seem as fast as i thought it should be though.

ssinstaller · Jun 9, 2006

Do you know what kind of intake temps he is running, and what his AFR's are at those boost levels?

MS6freek · Jun 9, 2006

here is how to do it :

I'v done It you see my Video it easy to plug a boost controller you just have to plug it between the actuator and they blow-off vacum .

It is very hard to take a picture around that area, just read this and you will understand!!!

Take the big hose on the actuator, not the one from the top, the big one from the bottom , unplug it .(THIS HOSE IS COMMING FROM THE TURBO, ME I PLUGGED MY BOOST GAUGE ON IT ) take a 1/4 hose and plug it to the Acturator and to you MBC ,
take the output from your MBC and plug it on the same vaccum of the blow off valve .

After that you just put a plug on the top of the actuator and on the selenoid plus witch is plugged with the actuator.

Thats all!!!

AND REMEMBER THE FUEL CUT OFF IT AT 19LBS IF IT CUTTING IT NOT GOOD FOR YOUR MOTOR.

P.S IT NOT EASY TO DO WAIT UNTIL YOUR CAR IS COLD THE FU### HOSE THAT IS PLUG ON THE TURBO IT ALMOST IMPOSSIBLE TO REMOVE . NEED SOME CHINESSE HAND TO DO IT. LOL!!!!

4DRHTRD · Jun 9, 2006

Some questions for you:
1. How is part throttle boost? So if you are just cruising at speed and want to increase speed does it go to full boost?
2. I'd be curious as to your intake air temps stock and with the MBC.

Thanks,
Mike

MazdaSpeed 6 :) · Jun 9, 2006

4DRHTRD said:
Some questions for you:
1. How is part throttle boost? So if you are just cruising at speed and want to increase speed does it go to full boost?
2. I'd be curious as to your intake air temps stock and with the MBC.

Thanks,
Mike

1 :it like normal it not always at 18 if i push it just a little it will boost just a little , like the stock boost

2:Ill check for it with the scanner.

Thanks
Martin

buit9110 · Jun 9, 2006

do you have any pics of your setup?

MazdaSpeed 6 :) · Jun 9, 2006

buit9110 said:
do you have any pics of your setup?

I tried to take some pics but it got to much hoses you dont see nothing. I will post a shema sunday!!

ok thanks...
martin.

MS6freek · Jun 10, 2006

i can tell you one thing guyz!!! this guy here knows what hes talking about when it comes to mazda's. so if he's telling you that it is good, IT IS AMAZING !!! (first)

CreatureCore · Jun 10, 2006

Any plans to get the car dynoed with the boost going strong till 7k?

MazdaSpeed 6 :) · Jun 10, 2006

CreatureCore said:
Any plans to get the car dynoed with the boost going strong till 7k?

Yeah it could be good but in Qubec I dont know a lot of Dyno place and it like 200$ to do the Dyno.

If you know any places that is cheeper tell my Ill go. Around Montral Area.

MazdaSpeed 6 :) · Jun 10, 2006

p5freek said:
i can tell you one thing guyz!!! this guy here knows what hes talking about when it comes to mazda's. so if he's telling you that it is good, IT IS AMAZING !!! (first)

Thanks Man !!!!(first)

crossbow · Jun 12, 2006

It should be noted, that raising the psi doesn't necessarily give a big power increase, and in fact, it can cause an overall horsepower decrease as charge temps skyrocket through the roof due to compressor inefficency.

Here's a post from another forum that explains why.

Turbo's have a range of efficency. This is what compressor map's show you. As you leave a turbo's efficency range, exhaust temp's rise. As exhaust temp's rise, the intercooler has to work harder to drop the charge temp down.

As charge temp's increase, power begins to drop as the engine will start to pull timing to prevent detonation.

It is actually possible to increase boost on a car, and increase power in one section of the graph (where the turbo is most efficent), and subtract it everywhere else.

Here's an example. This compressor map is "similar" (or the same as, depending on who you argue with) to the turbo in the MPS 6.
(Hitachi-Warner K04 single-scroll turbocharger)

Pressure ratio is calclulated by Absolute pressure/Atmospheric Pressure or 15.7 PSI+ 14.7 PSI/14.7 PSI

CFM need is...

CFM = (L x RPM x VE x Pr)/5660

CFM= (2.3 x 6500 x 90 x 2.068)/ 5660

CFM= 491.6

To convert CFM to CMS
http://www.turbos.bwauto.com/en/products/passenger_gas.asp

If you calculate for 19 psi (about a 4 psi jump...), you get a pressure ratio of about 2.3 (vs 2.06 stock). Plug this in to yee old formula in below mentioned thread...(and below mentioned books)...you get a CFM requirement of around 546, or 55 additional CFM required by the turbo.

Convert CFM to CMS and you get 0.257.

Plug in 2.3 on the Y axis, and 0.257 on the X axis, and you'll notice you aren't even on the chart anymore.

So lets drop it back down to 5,000 rpm at the same psi levels. 378 CFM stock, (.178 CMS), and 420 at 4psi higher (0.198).
Lets bring up the graph...

Edge of the efficency chart stock, off the chart "pumped up". On this particular compressor map, you'd have to drop all the way to around 3500-4000, to even get any benefit from more boost. Otherwise, you're so far out of the efficency range, all the turbo is doing is blowing hot air. Increasing psi out of a turbo's efficency range results in minor increases in power, but massive increases in exhaust and charge temps, increased chance of detonation, and increased wear to the turbo.

Sources of more information.

Forced Induction Performance Tuning
https://www.amazon.com (commissions earned)https://www.amazon.com (commissions earned)

Maximum Boost
https://www.amazon.com (commissions earned)
https://www.amazon.com (commissions earned)
I highly recommend anyone even considering modding the MPS6 pickup or borrow these books (check your local library). The concepts behind a turbo system are relatively simple, but jumping into tuning without understanding the result of your actions is always a dangerous approach.

MS6freek · Jun 12, 2006

COME ON crossbow!!! what else u need as proof that this is possible.

if u live close to montreal, i will be more then glad to install this for you. there is no negative on this . it works perfect. what else u need??? a video with both RPM and BOOST ???

Jeph · Jun 12, 2006

He's not doubting that it is possible to turn up the boost. He is just saying that turning up the boost may have negative effects, and not give you more power like you think it should

MS6freek · Jun 12, 2006

so i guess that you guys are forcing me to take my car to a dyno LOLL

i guess that i have no choice LOL

Jeph · Jun 12, 2006

You will probably see gains, but did you read the post with the graph. Once you push the compressor past its efiiciency range, you are heating the air more than you should, and therefore you COULD end up losing power. I am willing to bet that the first pull will be better, and as you get heatsoaked, you will see drastic changes due to you spinning the turbo out of its efficiency range.

20psi on mazdaspeed 6???

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