300rwhp 5sfte

[Final13]

so exactly what would be the easiest and/or cheapest way to aquire this much power? or let a lone 250 hp.... and where exactly could u buy these parts for this to work... cause i honestly can't find anything for the 5sfe to even increase the hp drastically, so im all stock... and not for anything, but im not that experienced with this engine either so specifics would be much appriecated to all n/a users hoping to get more bang outta the 5sfe.... and sorry if i sound a little annoying or noobish lol... but all different posts and thousands of different sites dont really give specifics on the exact parts or where to find any parts to increase the 5sfe to make it similiar to a 3-sgte or to a 5sfte and gaining a substantial amount of power without the hassels of a swap, especially if the person has never done a swap, nor knows any1 around the area who could possibly do it... so please if some1 could possibly create a list or something of what the exact parts that are needed for this issue, for example, say i have $5,000 to blow on the engine(just an example) wut would my best bet be to gain more power (not looking to hit 500, i was thinking maybe 350 though...)??? ....but yea thanks and again, sorry if i seem a lil pickey or like stupid lol...

You will get mixxed reviews and answers on this subject...For the terms of this particular thread, making 5sfe hp, then I will stick with that. Have you checked out the knowledge base on this forum, Mrturrari lists every part for a turbo on a 5sfe, I linked it up above in another post...What specifically are you needing to know? As far as finding parts, right here is a good place to start, turbo, manifold, ect...

[Final13]

The next level up you have the piggy back 5sfte's which usually have a larger turbo like a ct-27 or t3/t04 although a ct-26 could still be used. These require larger injectors in the 360-460cc range and need tuning to get the A/F ratios back in the safe range. You also still should use the 3sgte MAP and something to retard timing to be safe. These are capable of more boost but remember you are still using the 5s ECU and it was made for a NA application. We have seen people reach 220-240rwhp with these setup still using the stock cams. Boost has been as high as 12-14psi.

Do you like the stock ct26 or another turbo at this option? What are the advantages of having a larger turbo at this level. What about limitations. I understand the principles of forced induction in its many forms, I understand needing additional fuel to compensate for the added air into the cylinder, and I also understand needing additional timing to make everything work together properly. Its the nuances of turbo applications on a 2.2 5sfe that im unfamiliar with. (and many others too) What are your experiences positive or negative on a strictly stock internal and cam motor. In the case of mine, a recently (about 9000 miles ago) rebuilt motor. I am assuming it was done properly to stock tolerances aside from being bored over .020. Also another thing to think about might be the cost of your "stage 2" build as opposed to the cheaper but "quick to fun" stage 1 build?

CT20 vs CT26?

[mrturrari]

My personal feeling is that a ct-26 is too small for a 3sgte much less a 5sfe. It spools sooner on a 5s but also starts to fall off sooner which is one of the things that makes the basic setup feasible with the 5sfe ECU only. If the ct-26 wasn't so restrictive you would run lean in the upper RPMs. So if you are going to use a piggyback and spend the time and money to tune it, you might as well use a bigger turbo and get the added power for your money.

I haven't personally done the piggyback 5sfte yet. I might sometime soon if I don't skip right to an EMS. Of the two I know that are currently up and running, both done by Manny, they are both on all stock internals and stock cams. So even with a stock but good condition 5sfe you should be fine if you cover all your bases.

Let's see the nuances of the 5sfte...

The main thing to remember when using a fuel controller on a load/density system like the 5s is that as you trick the ECU into adding less fuel, which you must do to run bigger injectors, it also advances timing. It thinks that less air is going into the engine then actually is so, to get better gas mileage and more power for the amount of fuel, it runs a more timing advance. In the basic setup, fuel is pulled by using a 3sgte MAP sensor which uses a different scale then the 5sfe one. This in combination with the restriction of the ct-26 keeps A/F ratios close to where they were stock and gives you the range to go into the positive pressures. The restriction also keeps the flow through the engine at vacuum lower then it would be without the turbo so the little bit of extra timing advance is no big deal. At boost however it is a different story. The ECU is using timing maps that were made for vacuum because the system wasn't designed to see positive manifold pressures. When you are at say 8psi the voltage from the MAP sensor is telling the ECU that manifold pressure is still at a vacuum that normally would be only part throttle. That is why with anything short of a stand alone EMS you should have something to pull timing at boost. Many piggy backs can do this but if you use something less capable like a SAFC then you should also use a second box like a MSD-BTM.

[Final13]

So SMT6? That seems to have enough bells and whistles short of the gui interface...What about digi boost controllers like from apexi? Boost changes on the fly, not to mention one button changes to predetermined levels...how do the piggy backs respond to those changes?

The AVC-R II also uses a highly durable, fast action solenoid valve to physically control the boost. The valve movement (Boost Duty Cycle) can also be modified. Rising the duty cycle increases boost response, while lowering the duty cycle will slow boost response. This feature allows boost response adjustment for varying turbo sizes. Since larger turbo take longer to spool up (bad low end response) the duty cycle should be raised under lower RPM's for better response. The opposite should be done for smaller turbo (excellent low - mid range response, but limited top end power.) A'PEXi engineers address this issue by including extra menus for RPM based boost control. Drag racers may want to utilize the Gear based boost control function. Aside from the basic functions above, the AVC-R II has a Start Duty Setting (allows the boost to momentarily overshoot according to gear).

The A'PEXi AVC-R II also includes a Scramble Boost function which allows the user to momentarily raise or lower the boost level at the push of a button. Raising the boost level is commonly used when an extra burst of power is needed (entering a freeway). This feature can also be used in drag racing. The driver can set the main boost level to a low setting for maximum traction then, once full traction is achieved, the scramble boost can allow the vehicle to boost full power.

[mrturrari]

The SMT6 will work. I am working the bugs out of mine right now and so far I really like it. As for the boost controller, it doesn't really matter what you use as long as it can hold it where you want it. If it is tuned right the ECU will just read the intercepted voltage from the MAP sensor and give you the right amount of fuel and retard the timing for that load and RPM.

[Final13]

Im not convinced I would want to devote b/w 500-600 dollars into a budget if I decide to go this route anyway, but it is somewhat interesting that the Apexi boost controller does, (im not intimately familiar with this unit or any other for that matter) but changing boost pressures over the RPM range or simply the gear you are in seems like a pretty cool feature. I dont know if the SMT6 like to tune at "X" pressure or if it is flexible enough to tune what ever you want. It may not matter at all...Not to mention the having more than one boost profile, lets say for instance there is a boost creep issue, you can back it down to a milder profile. Im just beginning to wrap my head around what is absolutely neeeded and what is more of an experiment and should be avoided until later down the road.

[blumr2]

I am very interested in this conversation. I have been dreaming about turboing my 5s for a while now, but am not very experience with this stuff, so hopefully you wont mind if i chime in every so often (or is i say something totally stupid that would never work). But anyway, what if you used a stand alone? Wouldn't that completely eliminate having to trick this computer and add to that and all that stuff?

[Final13]

yes you can go that route (i dont have hands on experience with it) but its probably the overall better option. fully programmable makes things a bit easier, if you have the availability of a dyno...Im looking more in the direction of a budget minded but still reliable build...I dont want to go into the block after forged parts, my plan is a port and polish on the head (later down the road), some sort of piggy back, and of course the turbo setup, which in my mind will look as stock as I can possibly make it save for the intercooler which wont be stock...ive found a turbo that needs a rebuild on here but depending on availability of funds depends on when i will start with that. btw, the stand alones are in the 1500 dollar price range, thats more what im looking to spend on the whole project save for tuning...

[blumr2]

Yeah the stock look is another thing i was wondering about. The s word, SMOG. If I turboed my car, would it pass smog in Cali? If i could get it to look like a stock 3sgte, would it pass the visual?

[Final13]

I think that it might although i dont live in cali...its possible that it wont however, I think that if its done right and now obvious bov then it should be ok...

[blumr2]

How about tailpipe emissions?

[Final13]

I dont know the numbers but I would think as long as you are running a cat and the afr isnt enormously out of wack then you should once again be ok...

[blumr2]

Yeah thats what i was thinking. Im not trying to go for out rageous horsepower numbers anyway. I was thinking to go for the second option.

[Final13]

As am I, Im still trying to find a way to tune it when I get everything worked out...Only dyno that I am aware of is in a Bike shop, other than that nothing is in the area...

[91SQMR2]

Hi, guys I new to the MR2 world.I will tell you a little about myself.

My name is Mark Brooks 35 years old and I live in Maimi, FL, but I was born in raised in Jackson Ga. Yes, a country boy. I did 8.5 years in the US Army doing many different jobs and . My profession is Network Analyst/Network Security/Field engineer-Specialist, I've work for 2 different companies since then, but my heart was just not into networking, so I stop doing this about 2 years ago and start my own custom/high-end audio shop here in Miami. Custom cars is where my heart lies.

I have always love the style of this car and I finally found great deal on a 91 NA. The guy i'm guying it from gave a great deal on the car plus turbo it. So I started doing my research.

Now from reading trough this post I think he might be heading in the right direction. He is using a T3/T4 turbo with a Haltech engine mangement system not sure what injectors, but I will found out. I now the guy knows what he is doing because I just work on a project with him which was a custom 2 door 2006 dodge charge with 7 liter twin turbo supercharge hemi with a fast stand alone system nick named Tri-Charger.

I have big plans for this car. I will be my show/SQ comp car. I have already oder my F355 body kit and purchase my paint and everything else I need to get the car in shape look wise ( my friend who owns a paint and body shop has to give me a free paint job. I built is rear bumper of his custom one of a kind clk 430 and did his custom sound system for free/in trade for work I know I was going to need at a later date) The MR2 will be Mid-Night hawk black on top with Surpa white on bottom both colors with the blue pearl. Should be pretty nice.

I have print out all the info you guys have here and i will pass it over to him. I will keep you guys update on the project as it moves alone.

[nutty1]

welcome 91..can't wait to see the pics!

[blumr2]

Quick question: For the first option, are we supposed to use the actual 3sgte ecu? If so does that hook right up or are there some adapters or something?

[Final13]

You can get away without swapping ECUs according to my reading....it will just limit you to how much you can safely boost. Although if you dont have a way to tune a piggy back, it may be a better option and keep the AFRs where there supposed to be...Im sure Mrturrari has some more detailed things to say...

[blumr2]

Well, im looking for the most "bolt on" solution with as little difficult tuning as possible so how bout some help mrturrari

[Final13]

I know for a fact that there are mr2 and camrys with turbos and no external ecu change, but once again, be careful...