Joe P XZ MBC
- Thread starter unwrittenLaw
- Start date
xsivspd said:
Spools faster, yes.. Higher HP- doubtful (if BB is the only difference). It is about how much it flows, not how fast it gets there
.. Granted, the BB is more effecient and may produce a bit less restriction. I don't even know if this uses the same trim wheels as the T-25. Does it? If so, it won't support much more than the standard T-25. If it has a better compressor, then it is very possible.Joe
AFaceInTheCrowd
Member
- :
- 2010 Subaru Legacy GT
sry if i'm an idiot, but are dsm internals forged?
Hypereutectic (sp?) pistons and I am not sure about the rods, but I have seen quite a few stock motors (some with over 120K miles!!) hold well into the upper 400 WHEEL hp mark and some lower 500!!!! The motors are damn near bullet proof in stock form!!! I hope the MSP motor is a bit stronger than what everyone is hinting to. I am hoping detonation is doing a lot of the rods in. If they are really that weak, that make this thing the weakest motor I have ever worked with. I mentioned in another psot- we have an Integra GSR with 10:1 compression running 14 psi DAILY on pump gas with over 190K on the motor and it has been running for about 2 years or so now!!
Joe
Joe
joe the problem is mostly ignition mapping and the rest is not thekwiktsi said:
entire bottom end its just the rods cant take prolonged abuse with detonation.
the pistons on the other hand are pretty strong
the 2.0 was never meant for boost so iam surprised when they did it with the stock internals
now the 1.8 is a completely different story!
oh yeah 1 more thing the DSM pistons are HYPER or HYPO
perfworks said:
What is the ignition mapping like? Is it too aggressive? Does it advance until it hears knock then retard? Does it just advance to a preset and then just use the knock sensor as a safety? The DSM's seem to just advance based on knock feedback. Systems that use preset timing maps and the knock sensor is just a safety tend to be dangerous- the turbo Buicks are like that..
I am going to shoot for 16 psi on either water injection or water/alcohol mix. I want to see if it is a detonation issue or just a weak motor. I agree with you though, it is not 100% the motor, a lot of it is improper tuning IMHO..
I believe the pistons are hyper, I wasn't aware of a hypoeutectic?
Joe
when we are discussing forced induction you know already that we need to keep peak cylinder pressures after top dead center on the power stroke. ( the problem im sure is not only in this particular vehicle) on the MP3 there is a slight advance in the timing curve from the factory . the P5 are a little more conservative. since we cannot go in and change the stock ignition map (because the eec v ford pcm is terribly hard to crack being we dont even know what version they are using right now for the mazdas) we are forced to just dump fuel to correct the problem. this is the case in several applications not just mazda.kwiktsi said:
i dont know what the stock map looks like thruout the rpm and load band. it seems to be a bit aggressive at high rpm's. again it was not designed for F/I. the MSP ecu is a different story it has a great fuel and ignition map that is not very aggressive at the higher rpm's just low load .
now in regards to advancing untill it hears knock i dont think so. the map is set and the only learning i think it can do and will do is in regards to fuel.
the mazda (ford pcm) has a seperate system that will retard timing from voltage sent thru the knock sensor to the ecu. this is the case i know with many set ups but this particular ecu will stay on course and will ONLY retard when the knock sensor tells it to only. nothing else can make it retard timing. so this is a little like the buick set up.
when i talk about ignition i mean that in order to have a PROPERLY tuned vehicle you need to tune EVERYTHING involved in the combustion process.
that is my argument with those that say that fuel is the key. its only one piece of the puzzle and ignition plays a 50 % role in that too.
i just dont see how people can justify dumping fuel into the cylinder to "fix" the detonation issue.
anyway water injection i am thinking about also but i want to finish the project and market the kit and module with MAF and then ill fine tune my baby.!
and in regard to your ecu mapping question. i dont have the equipment for it niether does the guy i work with. we tend to leave that system alone and work around it by showing the ecu what "we want it to see ". it will then react on its own and act according to stock values. that way we control when the ignition process happens.
i live in south jersey by philly
origanally from brooklyn then east brunswick nj.
the shop i work with is in west long branch by the shore of rt36
hopefully i will move back up to north jersey soon.
Apexi: Yes the GT25 turbo may be small BUT will outperform a T28 and a 'Big T28 Killer' turbo.
If anyone wants valid information please direct your comments to Marco at www.magnusmotorsports.com who knows how to build 1/4 mile vehices. Rather than someone who knows zero.
If anyone wants valid information please direct your comments to Marco at www.magnusmotorsports.com who knows how to build 1/4 mile vehices. Rather than someone who knows zero.
well i would like to know how it will outperform the t28. without having to call. so if you would be so kind post some info so we ALL can see.xsivspd said:
i am in agreement to the t25 issue . it will flow more than what others on this board think but it is still a relatively small turbo when it is compared to a T3 and etc. now whether or not you need to go to a T3 is something that can be debated.
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- 2015 BMW 335i Sedan / 2015 Nissan Pathfinder Platinum 4WD
So a good CAI is the fix for the stumbling/hesitation problem?
you just used an extremely generalized term when referring to a T3 turbo, .... there is no such thing as just a T3 turbo, you havent specified the compressor size, turbine wheel, or turbine housing..so you could be referring to a monster t3, or some weak puny t3......your putting a 3" exhaust on a car with a t25 turbo...thats almost as smart as putting a front mount intercooler on a car with the t25...people just see FMIC and they think PERFORMANCE, not knowing about PRESSURE DROP....just like how ppl think your T25 is so much different than my T25, THEYRE THE SAME THING, the internals are the exact same...anyone can make the claim capable of pushing 400whp!! but how many people actually reach that? very, very few....because its not worth it...the t25 is a crappy turbo.....im just wasting my time...ill let you learn from your mistakes..go get your 3" turbo back exhaust and brag to all your friends about it...just like the ppl who are pushing 9+ psi on your cars..you have a member on the board..who fried his motor doing this....and yet people still do this?
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- 2015 BMW 335i Sedan / 2015 Nissan Pathfinder Platinum 4WD
whoa...sorry I asked..
