CulRidr's MP3 N/A build (~150whp goal)

[CulRidr]

I would not push higher then 7000 RPMs, let alone not for long amounts of times. I will most likely have my fuel cut set at 7200 RPMs. Knowing that the engine can push it when wanted though (during AutoX, and some spirited runs) is more then enough for me.

And yes the whole rotating assembly was balanced. You can see some of that work in post 176.

 

[TheMAN]

still waiting for the diff answer

 

[CulRidr]

Missed that post.
Because the diff was used, and sold "as is"; taken out of the transmission with the bearing on it. The transmission shop will take it off before machining, and put in a new one I provided. They will also replace the "bottom" one while they are at it.

 

[TheMAN]

oh ok... good luck with it.... it seems that some people with used LSDs have their welds not hold right

 

[CulRidr]

Thanks. I've heard the same thing, but this is a Rev3 so at least I have that going for me, plus I won't be doing any stupid launches all the time and clunking the gears in.

 

[TheMAN]

at least it's going to be NA, so it won't be taking a lot of torque

 

[CulRidr]

I'm hoping to push nearly as many ponies as a stock MSP, but I'm pretty sure the torque won't be nearly as high as one though, so you're absolutely right there. I'm glad I listened to you guys about this being the final piece of the handling puzzle. I can't wait to feel the difference, although beyond a little less understeer (which I've never really felt with the way the car is set up), I'm not quite sure what to look for in non-foul weather, where I know that I'll have better grip.

 

[TheMAN]

oh it definitely drives better in the rain... it takes getting used to as you get to do things you normally can't!

you're staying with the stock intake manifold right?
too bad the FS-ZE one is hard to get cheap

 

[CulRidr]

Is that because I'll have more grip from having the wheel with most grip always getting power?
And yes I am sticking with the stock MP3 one. You're probably the person to ask regarding this; what real advantage would the FS-ZE really make? The design is essentially the same except for the plenum chamber no? Maybe 1 or 2 hp?

 

[TheMAN]

the additional resonator box helps promote better low engine speed and very high rpm flow... I have no dyno results to compare it, but even my friend noticed it when I installed mine when I still had my stock cams... top end power was increased but the low end wasn't noticable on the stock cams because they were designed for low end torque to begin with

right now, even with all the upgrades on my car, I can cruise on a flat road in 5th gear at 1500rpm without bogging

how it really works? it gets too technical, but as far as I could understand, it involves sound resonance that uses it as pressure waves (and inertia) to help promote flow... VICS is just an extremely basic working example of this, and adding the resonator (that the FS-ZE has) further broadens the effectiveness of this... a true working example of this engineering is the VRIS intake manifolds that are in all of Mazda's K engines (except the miller cycle), the JF-ZE, and JE-ZE... there is a SAE article floating around the net about the KL-ZE... searching "mazda VRIS" will normally find it... read it, it explains the concept well

while all of this fancy intake s*** isn't going to produce the ultimate power, we all have to keep in mind that 99% of us aren't driving dedicated race cars that see constant high rpms... so you can say this "compromise" works very well for the street and allows for usable power at any rpm range

when either the MP3 or FS-ZE intake manifolds are combined with a good set of cams (like what you are running), the VICS design really shines... using crappy cams like the stock ones makes you think the intake sucks when in fact the cams are so restrictive it holds back everything and only works best with the 626 intake

also, what's good about the MP3 intake is, its VICS butterflies are like the MSP's and FS-ZE ones... they aren't the same as the bad normal FS-DE intakes where they can rattle itself off... the MP3/MSP/FS-ZE VICS butterflies are installed through a slotted rod instead of sitting on top of it... this means the it is very secure (pics on toprotege)


oh and anyone who want to say the VICS intake doesn't make top end power is wrong... my car spins the tires at the low gears near redline, and also hits the governor hard!
I'm still waiting for a time slot to get it dyno'd

 

[TheMAN]

also, because mine was flowing so well, I never hard carbon build up problems in the intake... in fact my EGR valve didn't have carbon build up but instead just have rust on where the servo motor goes

the restrictiveness of the normal FS-DE intake (VTCS bulls***) and bad cams accounts for the reason why it carbons up easily (especially when using cheap gas)

 

[CulRidr]

So you're saying that I would be hardpressed to see a difference considering I already have an MP3 IM right?
And what u said about the EGR rings true since I've never had build-up in mine.

And I was just reading that thread on TOP today

 

[YOUNGMP3]

I can't wait to see the final project.

 

[TheMAN]

So you're saying that I would be hardpressed to see a difference considering I already have an MP3 IM right?
And what u said about the EGR rings true since I've never had build-up in mine.

And I was just reading that thread on TOP today

there will be some improvements

 

[jimmysuite]

I'm not quite sure what to look for in non-foul weather, where I know that I'll have better grip.

The diff is a huge difference in wet weather but if you dont have snow tires it can hurt you in the snow. With both tires spinning, the front of the car can wander side to side. With only one tire spinning you still have one planted to keep you in one spot.

If I dont get a winter beater by this fall I'm going to be investing in some snow tires.

 

[CulRidr]

Cool!
Being in this part of the country without winters? That would be moronic. It's actually illegal to run without them across the river I can see from my house...(different province)

 

[CulRidr]

Alright, well, if I can't drive my car, I'm going to pretend like I am until I can actually do it for real

 

[Crazee D]

Rofl!

 

[CulRidr]

Before and after pix of the head getting machined (milled?):

 

[ucMP3]

(rlaugh)