MR2 NA More HP

[kentsvision]

So I have post a thread before about trying to pull 200 HP well I have 144 rwhp so maybe 200 HP to the crank. I want to try to get more HP out of my engine. I'm looking into an Intake manifold and Throttle body. I'm basicly prepaing my engine for turbo without having the turbo yet. I dyno at 144.2 wrhp. Where can i find a better intake manifold and bigger throttle body?

Going to get spark plug wires to see if I get more hp.

[VTsuckah131]

well you have to tell us your current mods for us to help you. 144rwhp?? how did you achieve this number??

[kentsvision]

I have Venom Injectors, Hot shot headers. Custom Cams, Wiseco Bored Pistons, New Oil Pump Aluminum Oil pan, Air Intake, New Spark Plugs, ACT Clutch, KO Racing Exhaust, Port, I think that's about it.

[TomsMR2]

you're just a few little HP away from the mr2 na record. you need an EMS, forget the manifold for now, you really need an ems.

i think chrisk will make you a manifold.. besides that, theres not many options.

[kentsvision]

Whose or what is chrisk and also what is the record

[TomsMR2]

147... chris k works for engine logics. www.enginelogics.com .

there might have been an RMR intake too.. but im not sure. i dont follow aftermarket intake manifolds much.

[kentsvision]

If I turbo My engine. would changing to the 3SGTE head be better?

[Blaze_System02]

Instead of turboing the 5S? People have done it, but some say it is risky.

I'd go with the 3sgte, and i'm sure you will be able to find a good deal around here.

I have researched this topic recently so i am a little rusty.

[Blaze_System02]

oh wait, i didn't read that correctly. Changing the head? I've heard it doesn't really do TOO much. Yes you notice a difference, but you also can have stayed with the 5s-fe head... OR many that was just with the carmy head. -.-"

[jlantz85]

you would gain quite a bit with the 3s head. its not just a bolt on swap though. you would be changing to 3sgte wiring harness and maybe have to have a few coolant passages drilled into the block.
for my 5sfte i had to do alot of work. ive had to cut/bend heatsheilds, make oil and coolant lines, reroute all kinds of hoses, fabricate brackets and other parts. its not a few hour job. im not using very many stock parts though so it might be easier if you do, i have no idea about that one.
hope that helps

[Jason.MZW20]

Performance wise, there's nothing wrong with a narrow valve angle head. The problem with the 5SFE is the engineering team and budget it received. The head design leaves a bit more to be desired, but if you look at the head design of say, the 2GR-FE or even the 2GR-FSE (which have the highest intake air volume of any non-turbo V6), you'll find a world of difference. They're all similar in the fact that they are narrow angle (roughly 22-35 degrees), but produce drastically different power. A head and intake system like the 2GR-FE on a 2.2L 5SFE would generate nearly 185hp with a 10.8:1 compression ratio, stock. Well enough criticizing Toyota ...

144rwhp is closer to 170 crank hp. The 5SFE would stand to benefit from a system like ACIS, but I guess shorter intake runners would do it justice too. Have you noticed the 5SFE got the short end of the stick on the technology front when compared to the 3SGE (which has ACIS and other improvements)? It'd be interesting to see how much it would improve the 5SFE.

You can also reduce the amount of rotational and frictional loss inside the engine to gain some power as well. The greatest gain, however, will come from an EMS like Tom said though. The stock ECU has terrible mapping and such. With proper tuning and a new intake manifold, you can probably reach 190-200hp @ the crank.

[mrturrari]

I'm going to throw in my 2 cents. Like Tom and Jason, I agree that an EMS is the next mod you should look at to get the most out of your current setup. I'm pretty sure you will top the existing record of 147rwhp with just that and tuning. An EMS is not cheap however and there will be some other upgrades you need to do along with it if you want to go much higher then that.

I am asuming you have one of the webcam grinds of 294 or 577? To really up your HP you will need to sell those and go with something a little more aggresive and also up the size of your injectors. If you keep the stock redline, which you should if you still have the stock valve train and rods, you could use a Webcam 101 grind or maybe a 256 or 264 advertised duration. I wouldn't go higher then a 264 though until you replace the valve springs and rods and can rev higher then 6300rpms. Also you are already pretty close to the limits of stock sized injectors. 315cc NA Supra injectors (with an EMS) will keep you supplied with fuel up to 180-200rwhp or you can go with 460cc rx7 injectors if you are anticipating passing even that sometime in the future.

You have reached the point where you need to make some decitions about what power level you are shooting for. As you go up in power more and more things have to work together to get you there so cams, headers and intake manifold have to match the rpm range in which you are going to make the power. The higher up in the rpm range you can get that the more HP you will achieve at the expense of loosing some low end. The low end loses are not always that much though when the engine has as much room to grow as the 5sfe.

[NIXmx]

You mentioned earlier about plug wires. I bought the Nology Hotwires and I'll tell you, they made a difference. The idle was smother and felt a bit more responsive. I'm also running Denso iridium spark plugs. They're expensive, but worth it.

[Breed-X]

are you running 5S-FE or 3S-GE ?

either way, good number!...

mods possible
- ITB setup
- what ecu are you running?
- adjustable camgears
- lightwheigt flywheel
- lightwheight crank pulley
- what compression are you runnig on those pistons?
- ...

[flipsta]

wheres you get the intake? or is it a drop in?

[MR2_Josh]

Originally Posted by NIXmx

You mentioned earlier about plug wires. I bought the Nology Hotwires and I'll tell you, they made a difference. The idle was smother and felt a bit more responsive. I'm also running Denso iridium spark plugs. They're expensive, but worth it.

Nology's do nothing more than the factory wires that you buy from the dealer or an autoparts store would do. They in no way increase the current. They will only flow as much as the factory coil and igniter can produce. Odds are the wires you replaced were shot which is why you noticed a differencein performance.