Internals

[03.5YellowMSP]

Well I have been reading all this stuff about people blowing their motors just from uping the boost alittle. I have to agree with everybody that is gonna go ahead and build the motor. I was wondering what rods and pistons were good for our motor? I want to be able to boost 12-14 safely. Also was wondering how strong our crank is? If im gonna have the whole engine apart I might as while replace all the weak points. My last question is how good are the stock injectors? I have heard that after 9 psi they are not able to flow enough fuel. I thinking of going with SDS for the extra fuel.

Let me know what you guys think.
2003.5 Yellow MSP

 

[low_psi]

The crank is forged.

You won't be able to safely run 12-14psi with forged internals, unless you're running more than just pump gas. The motor isn't weak, it just needs to be tuned.

Save your money and buy a Haltech E6X and some 440cc or larger injectors. You'll be boosting 12-14psi all day long with no problems assuming you have airflow mods.

FORGED INTERNALS ARE NOT GOD'S GIFT TO THE FS-DE!!!!

Detonation will kill your wonderfully expensive internals no matter how strong.

 

[KyRaceFan]

well said mx3. Having internals is just a good idea, but without a proper tune, the motor is gonna pop, and even if the rods hold, the pistons are gonna go, or turn into scrap metal and screw up the cylinder walls..
The motor and rods will hold the boost, but only with a good fuel and ignition tune. Haltech, some 440's, and a better pump are what you need.
Once you have that, then you can get the nicer internals, and up do some more tuning to run 16-18, not a good idea on the stock turbo, since its past its efficiency, but will still make some decent power.

 

[03.5YellowMSP]

thanks for the info guys. im only looking for about 200-225 at the wheels. I dyned it at 8 psi with a intake and open exhaust. I put down 173 hp and 189 torgue. Im gonna look into what yall suggested. It seems that would be the cheaper route. Thanks.

 

[low_psi]

heh, glad we could convert you

You should hit 200whp with FMIC, T-back exhaust and your intake at 9-10psi. Once you get a Walbro 225 intank fuel pump or Pierberg inline pump, a set of injectors(old rx7 450cc's work) and some tuning you'll be well at your goal running 10psi.

The Haltech E6X unit is going to give you the most control of the car, fans etc, but a good piggyback will also do the job. Perfworks is releasing 2 tuning solutions soon and atleast one more wil be coming out soon too(that's a surprise though).

I reccomend being patient and seeing what these new units are capable of. There may not be a need for the Haltech, and you'll most likely save money.

I know Juan@ Hiboost sells Haltechs and Keith @ www.flyingprotege.com sells the Pierberg inline fuel pump. Check the Forced Induction Forum out, as there's a lot of information there. Juan posted the prices to the Haltech and accessories needed to run on a Protege at the end of the E6K Powered Mazdaspeed thread.

Goodluck

 

[03.5YellowMSP]

thanks agian. ive been wanting to ask those question for awhile but didnt feel like hearing "dont you know where the search button is".

 

[low_psi]

i understand. unless you don't type with semi-proper grammar i don't mind answering. haha

ie. wat iz dis shiz bout boot controllar ans motar popz?

 

[irr5302]

the fuel curve in the msp is very rich i think this fuel
support 12 psi to 14

only with the internals is good

the problem in the fs motor is the rods at high revolutions 5000 to 6500 and the high load in 4 and 5 gears.


the stock boost spike at 4000 7.4 psi and beging to down at 5000
6.4 6000 5 tp 5.5 psi

the mazda guys know the truth about this motor and down the boost at high rpm

 

[mspeedpro]

what size are our stock injectors?

 

[low_psi]

yes, irr5302, a car full of people and boosting 12psi is placing quite a load on the motor, but the car can handle his goal in 5th no problem.

Steve- the injectors are 280cc, but some ppl say they can perform similar to 310cc's at 100% duty cylce.

 

[MazdaSpeed0020]

So your going to have to run higher octane gas, but what about the people, like me, that can only get 91. I live in colorado and have not seen anything above 91 octane. Would i have to add octane boost too up the number? That would get a bit expensive i would assume.

Matt

 

[low_psi]

There is no need to run higher octane gas(104oct+ race fuel) unless you want to boost ~10-12+psi without fuel or timing tuning. Many factors will decide what the limit is, but its best if you don't test them if you can't afford a new motor

Only being able to get 91oct isn't a big problem at all. As long as you run the highest you can get you'll be fine.

If I didn't answer your questions clearly, please feel free to PM me.

 

[03.5YellowMSP]

I thought we had to run 93 in our car at all times. The lowest I have ever run is 92 which isnt that much different. If I wanted to run higher octane would I need to remove cats?

I ran 14 psi one for a day back before I read anything about our motors, it was fun and very fast but after I actully read the information provided on our motors I havent ran more then 8 psi.


P.S. It finaly snowed about 4 inchs in Va this week. Stock summer tires really do suck. Had to have someone push car while I gased it to get up driveway.

 

[jersey_emt]

You cannot use leaded fuel with the cats...you can get something like 104 octane unleaded.

 

[azian6er]

I will have concrete answers for you in about 2.5 weeks what forged internals and haltech e6x can do on a msp with stock turbo and stock injectors.

After that i will most likely go with some higher flowing ones aka rx-7 450s or some rc 440s.

-
Aslo, people say the rx-7 ones will fit, but has anyone ever tried to fit them? i know turboge had some but he sold them because of a slight prpblem, i cant remeber what though.

-B

 

[EVILSRT]

The crank is forged.

You won't be able to safely run 12-14psi with forged internals, unless you're running more than just pump gas. The motor isn't weak, it just needs to be tuned.

Save your money and buy a Haltech E6X and some 440cc or larger injectors. You'll be boosting 12-14psi all day long with no problems assuming you have airflow mods.

FORGED INTERNALS ARE NOT GOD'S GIFT TO THE FS-DE!!!!

Detonation will kill your wonderfully expensive internals no matter how strong.

Best quote ever!!!

 

[03.5YellowMSP]

I will have concrete answers for you in about 2.5 weeks what forged internals and haltech e6x can do on a msp with stock turbo and stock injectors.

After that i will most likely go with some higher flowing ones aka rx-7 450s or some rc 440s.

-
Aslo, people say the rx-7 ones will fit, but has anyone ever tried to fit them? i know turboge had some but he sold them because of a slight prpblem, i cant remeber what though.

-B

Sounds good to me. Keep us updated.

 

[Manach]

Tell me the impedence, and I will try..

Rex injectors are 460cc btw.

I got high and low impedence at home.. for testing purpose in my Rex.. but I could swap them over..

 

[Petey Turbo]

Just in case anyone wants to know..If the low imp. injectors work, we can use 680cc ones from the RX7 84-85 13b or we can even use stock DSM injectors at 440cc

 

[azian6er]

Just in case anyone wants to know..If the low imp. injectors work, we can use 680cc ones from the RX7 84-85 13b or we can even use stock DSM injectors at 440cc

i know turboge did a lot of testing with different injectors and he said that there was an issue with the rx-7 460s. He belives however that the wrx ones may be able to work well. He says they are about the same size the only difference is that they flow more and are fatter. Also there is a little trick you can do to turn them from 460 into 740 with the aid of a dremel.

I believe our inj. are low impedence. Also with the haltech i will be able to use either high or low impedence injectors being that there is a setting on there to be able to control them.

So, does anyone know of a direct drop in injector that is compatible with our cars?

so far we have some maybes but no positives.

-B