Hi all im looking for some advice i did a few small mods to my car a while back and im just wondering where i should go next for more power
i already have
power fc with commander
avcr boost controller
exedy stage 2 clutch
5zigen pro racer zz exhaust
walbro pump

All advice is appreciated

Induction and down pipe, remap, then you will have to forge it and buy an after market turbo.

Knew I was forgetting something
I have an apexi intake kit and a japspeed down pipe and it's mapped for all that stuff

Upgraded intercooler or air to water cooler.

Good call Marty. I did see a post on mr2oc.com where forged internals to very reasonable.

How much more power do you want??

Because you already have a lot of supporting mods then I'd recommend going for a bigger turbo. Best bang for buck. Only question is what turbo are you running now?

Quandry wrote:
How much more power do you want??

Because you already have a lot of supporting mods then I'd recommend going for a bigger turbo. Best bang for buck. Only question is what turbo are you running now?

yeah, a few very low miles gen3 turbo kits have come up on mr2oc.com in the last few months

i have an st205 charge cooler i just havent fitted it yet
it is just the standard turbo i have at the minute its running at around 1.25 bar
What would be a good turbo , i am hoping eventually to get a stroker kit does any body here have one

I'm running an MR2.2 I wouldn't recommend pursuing a stroker unless you were doing a whole engine rebuild anyway. There's plenty of high powered 3sgte's out there that aren't stroked and for top end drag racing - some people will argue to keep the engine oversquare. However if you are doing a whole engine rebuild then it's a pretty nice upgrade for not much money (depending on which kit you go with and the overall quality you want to achieve).

A nice add on of a stroker is that it will help a larger turbo to spool sooner. It's not a magic wand mind but it will help a little.

On the turbo side, this is where you need to figure out what your power goals are. If you pick a hp figure, for sure there's a turbo out there that can get you to it. 350whp, 500whp, 700whp?? it's all been done in the UK/USA and maybe even track cars here. One thing to note though is that the higher the hp the more $$$ you have to spend and you will quickly need to upgrade your clutch and fuel injectors to keep up. There's also a limit to what the standard cast pistons will take so if you're looking for ultra high power then you'll be needing an engine rebuild on forged pistons anyway.

how much hp psi are the standard pistons good for im told my clutch is good for over 350hp so if i was looking for around 350-400 hp what would i want to be looking to get

There's a pretty good article on HP upgrades for the 3sgte: www.mrcontrols.com/primers/power.htm

If you're going for over 350hp (flywheel), my gut feeling is consider forged pistons for reliability. For sure there will be cars that will make over that, maybe way over that with cast pistons but how long will they last? A lot of it also has to do with the tuning. If the tune is too lean, and the boost to high, then the strongest pistons in the world aren't going to save your motor.

What type of driving do you do with your car? are you stuck in traffic jams regularly or only out on the open roads/race track on weekends?

Thanks for the advice
I dont drive it that often to be honest ive a van for work and a 407 for the family so it would mostly be just taken out on sundays and any other day that i could ,so maybe a turbo upgrade and fit the charge cooler and maybe some water/meth setup might be the best way to go for now what would be a good choice for a turbo water inj ect any advice is greatly appreciated

Well a Precision 5857 would be a real cracker. You may have to upgrade your clutch though. You could go to a bigger one again but that would probably need a lot of upgrades in ignition and other areas.

Here's 424whp vid with the 5857 (tuned on e85 though)


ATS racing sell that turbo as a bolt on kit. Also there was a RacerX kit available also which would be worth looking at:
www.mr2.ie/mr2-forum/7-news-and-announce...rbo-kits-from-racerx