shortfuse

iTrader: (1)

After starting to mod my fd, a couple questions came up that i havn't fully been able to answer myself or find on this forum.

My car as it stands has the following mods.
rebuilt engine 8,000 miles
mild streetport
hks Catback
Midpipe
hks Downpipe
act street/strip clutch and pressure plate
m2 performance unlimited ecu
running sequentially at 13-14 psi

1. In order to be running at that boost is it neccessary to upgrade my fuel pump, and/or injectors? 2. Also am i harming my motor significantly by not upgrading my intercooler to a larger sized one?

3. The last question i have is that if i were to run the turbos non-sequential at 13-14 psi, would i need to change the ecu considering i would be getting boost at different times than running it sequentially?

I would appreciate any feedback to the newbie questions that i asked. Thanks

Cgotto6

iTrader: (8)

Stock fuel system should be fine. The intercooler is just limiting the amount of power you can put out. Its kinda a joke. Just get a better one when you can...

No need to change the ECU for non sequential. But keep it sequential, you wont like the non sequential lag. Trust me, there is no reason to take a good functioning sequential off the road. You wont get any power gains...

Ps. you have almost the exact same set up as I have. Even the engine milage..Haha.

Kento

^Agreed, especially with regards to seq/non-seq. Although you're not "harming your motor significantly" by running the stock IC with that much boost, you're forcing the turbos to work that much harder because of the excessive pressure drop. However, once you upgrade the IC, chances are very good you will have to get a boost controller and/or port the wastegate due to the increased flow, especially with the MP.

shortfuse

iTrader: (1)

Thanks for the quick responses. Forgot to include that i have apex'i intakes as well. Anyway as for the seqentials working perfectly, their actually not. Even Though i hit 13 - 14 psi intially my boost tapers quickly down to 6 or 7 psi.

I am going to be taking my car to a rotary shop ( taking suggestions on that as well ) so i can finally have the problem fixed. I was just wondering if i should have them fix it and run it sequentially or tell them to modifty it to non-sequential.

Has anyone ever had experience with Tri-Point engineering in Canoga Park?

Cgotto6

iTrader: (8)

Haha, of course you have apexi intakes...I do too...Weird...

Just get the system fixed, dont to the easy way out to non sequential, you wont be as happy with it. From what ive heard, tri point it a good place...

shortfuse

iTrader: (1)

haha that is weird. Thanks for your help man.

Was wondering if you have dynoed your car and what hp and tq numbers your getting? im expecting around 340hp and around 300 tq... you think thats reasonable?

John Magnuson

I would think you'd probably be closer to 280 rwhp

scratchjunkie

do you mean pettit ecu and not m2? m2's ecu is no good with a midpipe and they do not have an "unlimted" version.

shortfuse

iTrader: (1)

Mybad its called the stage III ecu upgrade from m2 performance. And yes they do make this ecu to eliminate the cat because i remember reading it on their site a while ago when they didn't go out of business. ( mods it supported were m2 intercooler m2 intake m2 downpipe m2 midpipe m2 catback at 14psi )

Anyways as for the guy who said 280 rwhp, i dont figure out how your getting to that low of a number considering there are rx-7's with the same mods as me boosting only 10 psi and are a little above or around 300 rwhp. I'm boosting 14psi and the only constraint in my setup is that i dont have an upgraded intercooler, but i dont think that will net anymore than 15 whp loss.

Cgotto6

iTrader: (8)

Im still workin out the bugs in my car. Im goin to the dyno as soon as its done though. Im hopin for anythin above 315whp.

adam c

iTrader: (2)

I don't know where you are getting this info. M2 never recommended use of their ECU with a midpipe. Perhaps you are confusing them with Petit. I'm not saying that you can't, or shouldn't, use it with a MP ........ but that's what they said . Because they were a bit conservative, I suspect they didn't want to be responsible for people blowing engines by pushing too far. The Stage III ecu was built with M2's full stage III upgrade in mind. The full upgrade included: ECU, cold air intake, intercooler, DP & CB. It was designed for use with a stock main cat, and was supposed to provide 320 rwhp (a VERY generous estimate) @ 12 psi

shortfuse

iTrader: (1)

I believe you after looking at some other threads about the ecu. The buyer in which i purchased the ecu from said it is supposed to include a midpipe. So i was lied too. Do you think that it is possible to leave the midpipe in their and boost only 12 psi considering m2 probably tuned the ecu to run it that way ( to be on the safe side)? I will probably stay around 320 rwhp that way anyways... Thanks for the help.

shortfuse

iTrader: (1)

Also my intercooler isnt going to be upgraded like m2 recommended so the pressure drop will compensate for the extra flow that the midpipe is giving me... Right?

shortfuse

iTrader: (1)

anybody know the answer to my question???

rynberg

Running over 12 psi regularly on the stock IC is asking for trouble, IMO. The stock IC has a large pressure drop, which makes the turbos work hard to hit those boost levels. This results in worn-out turbos and high intake temps, which are bad for the motor.

I would get a boost controller and lower boost to 11-12 psi until you upgrade the intercooler. As far as your boost leak goes, it is probably saving you from boost creep. I would install a restrictor plate in the exhaust to keep boost under control, once you find your boost leak.

As far as the fuel system goes, I would not go over 13 psi on the stock fuel system, but others have pushed it to 14-15 psi (too risky for me).

Finally, I would NOT take your car to Tripoint for any kind of sequential system troubleshooting...they are great for general work and suspension tuning, but don't seem to be up to snuff on more advanced engine matters.....