Mazdaspeed motor vs. Protege5 motor

[Captain KRM P5]

So, I should keep the existing motor in my car. Get a FPR and Voltage clamp

that's what i would do, and then get the setup tuned on a dyno

 

[Captain KRM P5]

i say get ATLEAST a piggyback like the eManage or MPI Tuner or go standalone.

no use in half-assing it.

i don't think using an FPR on mild setup like the msp turbo is half assing it. if you wanted to run higher boost levels i'd say the FPR is inappropriate. its pretty well documented what happens to the automatics in these cars when you run higher boost levels...boom

i have no problem with standalones/piggybacks, but you'll spend at least twice what you would on a perfectly function FPR setup when thats not really needed.

 

[y0sky]

i don't think using an FPR on mild setup like the msp turbo is half assing it. if you wanted to run higher boost levels i'd say the FPR is inappropriate. its pretty well documented what happens to the automatics in these cars when you run higher boost levels...boom

i have no problem with standalones/piggybacks, but you'll spend at least twice what you would on a perfectly function FPR setup when thats not really needed.

What would be a good FPR setup? And do you think 9lbs daily on auto is pushing it?

 

[Captain KRM P5]

What would be a good FPR setup? And do you think 9lbs daily on auto is pushing it?

I'd do a BEGI rising rate FPR (best in the business) with a Flyin' Miata voltage clamp and possibly an inline fuel pump. with the msp setup you might not need the stronger pump.

I would start with the stock msp setting of 7 psi and see how the tranny likes it first before starting right up at 9 psi. I'm guessing it'd be fine, but play it safe to start.

i'd have the following gauges ready with the install - boost, air/fuel ratio and fuel pressure (rated up to 100psi)

 

[msubullyfan]

I would start with the stock msp setting of 7 psi and see how the tranny likes it first before starting right up at 9 psi. I'm guessing it'd be fine, but play it safe to start.

I'm not so sure that there is a way to "play it safe" on this one. I don't think that the tranny is going to "like" even the 7 psi boost. There isn't much design margin in most all automatic transmissions nowadays as a way for the OEM to cut costs, and there aren't many autos that you'll be able to significantly increase HP without overstressing the transmission.

I have everything sitting here in my garage. I have the motor, radiator, intercooler, ecu, instrument cluster, and all stock piping. And yes I bought it from the guy in hawaii, he said he has the tranny but I dont want to deal with a tranny swap too.

I think that it's very likely that you're going to have to deal with transmission issues later if you leave the stock automatic transmission in the car. Do it now, or do it later after the auto gives out.

I don't mean to be a killjoy about this, it's just my honest opinion as a mechanical engineer that deals a lot with large-frame industrial gearboxes. If you are committed to this, I wish you the best of luck and hope it works out for you.<!-- / message --><!-- sig -->

 

[Captain KRM P5]

a manual swap will involve alot more than just having the transmission - clutch master cylinder, lines, of course the pedal, the ecu....

both HiBoost and BEGi/FM have run 6 to 7 psi on automatic cars with much bigger turbos that offer much larger volumetric efficiencies (hence, more horsepower) without a problem. it's when you start upping the boost on a t3-sized turbo that you are going to have problems, starting with lots of slip. 7 psi coming from the t25 on the msp isn't going to tear this tranny apart.

 

[y0sky]

pirana was running 12psi with the sportmatic transmission. Does anyone know if he had modded the tranny at all?

 

[Captain KRM P5]

pirana was running 12psi with the sportmatic transmission. Does anyone know if he had modded the tranny at all?

he may have been using a tranny cooler.

just a little insider information; i was talking to my Mazda rep today and was told that Protege automatic transmissions are now one of THE most backordered items in his inventory - they break earlier and more often than manuals he says, although the manuals he didn't think were all that and a bag of chips. The sportshift automatics have fared better he said, than the traditional autos.

does this mean you can't/shouldn't mod your car? of course not! i would just be careful. just ask deckedoutmp5.

 

[alexlitov]

why you don't want to swap to a manual tranny? you already have the ECU for it...

 

[matthew_talbott]

auto tranny and manual tranny use different bolt patterns

when i talked to the good people at corksport about building myself an engine they said be sure to get a manual block becase the bolt patterns are different for a manual and automatic so you wouldn't be able to use the msp bottom end with your automatic.

 

[hello2000]

Why use the MSP motor anyway? If you want to keep your motor (p5), then get the Hiboost turbo kit and you will see higher numbers than the MSP.

 

[Aricjm15]

when i talked to the good people at corksport about building myself an engine they said be sure to get a manual block becase the bolt patterns are different for a manual and automatic so you wouldn't be able to use the msp bottom end with your automatic.

thats when you swap the bellhousing, mazda isnt going to make two seperate blocks, two different bell housings yeah, different crank and internals no

the MSP ecu will most likely NOT WORK, your engine would run, BUT, since the transmission is COMPUTER CONTROLLED, it will not move because the msp ecu is not programed to use the lockups in the tranny

 

[y0sky]

Why use the MSP motor anyway? If you want to keep your motor (p5), then get the Hiboost turbo kit and you will see higher numbers than the MSP.

Because Hiboost is $4,000. I got the motor and turbo for $1600 shipped.