3rd gen Engine/Drivetrain Engine/Drivetrain Modification Discussions for 1999-2003 Models Only (BJ chassis)

To Boost or not to Boost!

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Old October-22nd-2005, 10:46 AM
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I havent looked at the pics of the kit in a while....It looks SO BEAUTIFUL! I cant WAIT!
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Old October-22nd-2005, 03:52 PM
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Yeah, too bad I haven't learned to salivate money.
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Old October-22nd-2005, 07:55 PM
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Ok, I posted this idea for people to comment on and to discuss the possibilities, I didn't intend for people to get pushy. I was just stating stuff that a supposed PROFFESIONAL technician that has worked on and boosted god knows how many cars and is pretty reputable around here. And from the sounds of it you know your **** too Roddimus so...I guess I am back at square one. I never said that what I heard was right I just said what I was told! Obviously I don't know a whole lot about it or else I wouldn't be asking.

PLease explain how a turbo reaches full power at 2500 RPMs ? Im confused on that.
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Old October-23rd-2005, 11:53 AM
  #19  
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Turbos run off exhaust gasses.
THe more exhaust gasses you have the more the turbo will spin.
The higher the RPM the more exhaust your putting out, not nessecerally more like the more power you put out the more exhast you have, you get the idea.

A smaller turbo will spin quicker because its lighter and easier to move while a bigger one will take more to move but will be more efficent at puting out more power as opposed to just glowing red and messing itsself up.

I've heard the wagner set up spooles at 2500 rpm but no one is really pushing for wagner to do there stuff now. The highboost kit spooles a bit higher at some 3k-3500 rpm.
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Old October-23rd-2005, 04:37 PM
  #20  
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Damn I wish it would keep the AC. My wife would kill me.
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Old October-23rd-2005, 05:19 PM
  #21  
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turbo's achieve full boost sooner because of the turbine housing capturing exhaust gasses and in turn spinning up the compressor side much faster than a SC which is dependent on rpms (except lysohlm compressors/twin screws).

I turbocharged protege (msp) can hit full boost at about 2500 in second gear under a load. Full boost is hit and then by about 4K it starts dropping off slightly and will settle about 5psi. On my system boost is based 100% on engine rpms and the blower pulley. If you have a 6.5psi pulley on a 6500rpm redline then you'll have 1psi for every 1K rpms..... @ 3K rpms you'll have 3psi. etc etc

My buddy here locally has a KKK turbo 1.8T Jetta. It's slightly smaller than the T25 on the MSP's. In second gear he can stab it and it'll peg 23psi at 2650rpms. Turbo's are the most efficient form of FI and can provide power levels far greater than SC's but as with anything in this world there are compromises to be had.

Does anyone with a turbo car have a dyno to post?? It would really help to put a MSP dyno and my dyno side by side.
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Old April-12th-2007, 04:18 PM
  #22  
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so??? for 2.0L AUTOMATIC its better to have a Supercharger OR a big *** turbo that starts spooling at 3,500 4,000 ?
So you dont "Hit" the tansmision so hard?
My gear's RPMS are something like this when floored
I drive a 2006 Mazda 3 2.0L Auto

1 6,000 drops to 3,600
2 6,400 drops to 4,200
3 6,400 drops to 4,400
4 6,500

these are average sortof good numbers there were taken while driving by eye, not in a dyno
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Old April-12th-2007, 06:01 PM
  #23  
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I'm in the same dilemma here ... I'm really close to putting together a MSP turbo kit for my P5 but I'm scared shitless cuz I have an auto tranny. The most I read and research this possibility, the more horror stories I hear about people blowing their engines up and that just makes me want to stay NA. On top of that, just about every thread I've gone over on any of the forums where people are talking about turboing an auto, the fact that the auto tranny is crap comes up and yet again makes me want to stay NA. I really want some zoom but I don't wanna go boom ..
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Old April-13th-2007, 08:55 AM
  #24  
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Originally Posted by KrayzieFox
I'm in the same dilemma here ... I'm really close to putting together a MSP turbo kit for my P5 but I'm scared shitless cuz I have an auto tranny. The most I read and research this possibility, the more horror stories I hear about people blowing their engines up and that just makes me want to stay NA. On top of that, just about every thread I've gone over on any of the forums where people are talking about turboing an auto, the fact that the auto tranny is crap comes up and yet again makes me want to stay NA. I really want some zoom but I don't wanna go boom ..
you'll be fine..make sure you have the fuel right, since an MSP ecu probably wont work with your auto tranny....and just run synthetic ATF, with a tranny cooler, and keep the boost at stock levels....if you want more boost, talk to lentech first about building your tranny
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Old April-13th-2007, 08:57 AM
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torque is what kills auto's....the onset of that torque needs to be as gentle as possible but there IS a limit to what it will hold.

Stick around the 200wtq limit and you should be fine
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Old April-13th-2007, 09:45 AM
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Originally Posted by macdaddyslomo
you'll be fine..make sure you have the fuel right, since an MSP ecu probably wont work with your auto tranny....and just run synthetic ATF, with a tranny cooler, and keep the boost at stock levels....if you want more boost, talk to lentech first about building your tranny
I'll probably get the BEGi FMU from PGarage and I'm already running synthetic ATF with a tranny cooler for the last year or so. I've taken good care of my tranny so far and I really don't want it to go kaboom for an extra 50-60 HP.

Does the MSP have a different fuel pump/injectors tho? Or is there no need to upgrade if I'm only running 7 psi? As far as I know everything's the same between the two engines except the turbo & exhaust of course but since I personally don't know any MSP owners I guess I never got a chance to take a peek at one up close.

Thanks for the advice guys, I'll keep you posted on the progress. I wanna take this slow but do it right .. better safe than sorry right?
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Old April-13th-2007, 10:49 AM
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Originally Posted by KrayzieFox
I'll probably get the BEGi FMU from PGarage and I'm already running synthetic ATF with a tranny cooler for the last year or so. I've taken good care of my tranny so far and I really don't want it to go kaboom for an extra 50-60 HP.

Does the MSP have a different fuel pump/injectors tho? Or is there no need to upgrade if I'm only running 7 psi? As far as I know everything's the same between the two engines except the turbo & exhaust of course but since I personally don't know any MSP owners I guess I never got a chance to take a peek at one up close.

Thanks for the advice guys, I'll keep you posted on the progress. I wanna take this slow but do it right .. better safe than sorry right?
MSP has the exact same injectors fuel pump, there are fine for 7psi on a T25...Run high octane as well though...you gonna get the voltage clamp from BEGI as well ??

Last edited by macdaddyslomo; April-13th-2007 at 10:52 AM.
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Old April-13th-2007, 01:05 PM
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Originally Posted by macdaddyslomo
MSP has the exact same injectors fuel pump, there are fine for 7psi on a T25...Run high octane as well though...you gonna get the voltage clamp from BEGI as well ??
Yea .. BEGi & O2 V clamp is the plan. Now when you say high octane does that mean 91+ or what? I didn't know the msp required higher octane .. so thanks for the heads up!
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Old April-13th-2007, 03:44 PM
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Originally Posted by KrayzieFox
Yea .. BEGi & O2 V clamp is the plan. Now when you say high octane does that mean 91+ or what? I didn't know the msp required higher octane .. so thanks for the heads up!
yes 91+...93 if available...no problem
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Old April-13th-2007, 05:47 PM
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hey krazie, IIRC I have a brand new begi fmu and voltage clamp at my house. IF you want it I'll make you a good deal on it.
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