Mazda 6 Forums banner

Turbo for the 2.3 6i

107121 Views 163 Replies 64 Participants Last post by  RiveraJ
This will be an evolving thread, but should provide enough info that we won't have a new thread every other day asking the same questions. Please bare in mind that the info provided is based solely on my experience and opinion. Please take the info i have and use it as you will, discuss the project with your local shop/tuner/dad/brother and move forward from there. Anyone with more info please feel free to give input, but i will be cleaning this thread up as it goes, so please don't bitch.

Q: What are my options for turbo'ing my 6i?

A: The options vary currenlty. there are 5 standard answers, most can be googled for more info
1) ]HiBoost (out of business, but used kits floating around)
2) F2 (never officially release, check with GP-Werks for more info)
3) HASS (via (not produced, but at least 2 kits floating around)
4) built using Mazdaspeed6 parts
5) depending on where you are, a TRUST (Greddy) kit is available, though tuning has yet to work in the states, as well as fitment issues with LHD models.

Q: Do I need to build the engine? what boost can i run "safely"?

A: The stock block has been pretty good on about 8psi on pump gas. Anything more than that the bottom end should be addressed. solid tuning and race fuel can up that #, but people have popped engines above 8psi.

Q: What about the tranny, i have an ____ (insert MTX or ATX)?

A: both tansmissions will be fine.
1- The stock MTX has a tendancy to sheer 3rd gear at times (no specific power level, just some last and others don't)
2- Both 4 & 5spd ATX trans also work, though it's recommend to run 6psi on these setups. also, an additional trans cooler is essential as well for the atx.

Q: Can i make my own, i found a good kit on ebay?

A: sure, have fun, don't cry when it doesn't work right and cost more in the long run!

Q: How much can i expect to pay?

A: Quick answer is have $5k ready to spend, or don't think about it. Now, it depends on the kit obviously. F2's stage1 will be the lowest price KIT, and HASS ranges up to $4300 i believe. You can make your own Mazdaspeed'ish setup, but it is not a kit, so prices will vary and you'll need to find your own tuning solution. The install is amazingly easy in these cars, the install would range in the 5-8 hour range if you are looking at a shop. Most KITS will come with a tune to get you started, though it's recommended to to dyno tune your specific car, which is roughly a 2 hour job, though doesn't really need to be done ASAP.

Q: What else do i need to buy?

A: If it's a true kit, then nothing! There are items to make it better, make it last long and obviously make more power....but they aren't needed. Things i would recommend you have on our short list however, as they will aid with tuning and safety.
1- a WIDEBAND (no, the narrowband you saw on ebay won't work) Air/Fuel gauge, this is a must for tuning
2- spark plugs (i REALLY like the Autolite 103's, especially in the beginning while tuning. They are UBER cheap, and work well, easy to gap also)
.....that's it, for the long list i'd add:
3- oil temp OR pressure gauge (dont' see the need for both, and no your stock gauge doesn't do anything. this is only to see problems sooner, nothing else)
4- boost controller (DO NOT ADJUST BOOST!!) A boost controller will aid in how the boost comes on and levels off, feels much better. i suggest a manual controller in the engine bay that you CAN'T touch while driving)

.....There are other things, but they are not turbo related, they are performance related. (things like limited slips, clutch/fly, better rubber). you DO NOT need a turbo timer if you have any common sense, you can, but you are just spending money.

This is all the basic info on the setups that i could think of. For the most part, an 8psi intercooled kit on a STOCK 6i MTX in the 225whp range, the ATX (6psi) at just over 200whp. Power will be increased with an exhaust, which most have anyhow, but it's not needed to enjoy boosting.

notes for the ATX guys:

'03-'05 6i's with the 4spd have an off the shelf option to upgrade both their valvebodies and torque converter from, or whole tranny if you'd like. The valvbodies help out an amazing amount, and allow for a bit more boost if you want, the converter allows for a higher stall speed which is nice if you powerbrake often (the strip) and they can also remove the lock-up setup which can be a bitch when having fun on highway cruising.

'05+ 5spd ATX's have faster/tighter shifting out of the box, so that is a nice start. If valvebodies are something you want (as they can be improved quite a bit), has experience with them, though you need to remove yours and send it to them for the work.

Both models- please take a minute to understand how your ATX works, and then understand why i say you should always let your foot off the gas between WOT shifts. It is not something that will brake the tranny in one time, but please understand it's not recommended as the boost is still being applied while the tranny is trying to shift. Also, for the same reason, if you are cruising on the hwy while the converter is in lockup, DO NOT just slam it to the floor, it's not good for it either, a quick blip or downshift will safe a lot of trouble.

Now, i know of roughly 6 turbo'd 6i's that are (or have been) daily drivable, there are currently 4 on this forum actively i believe (as of 6/09). I would imagine all would attest that it's a friggin blast to drive, and the smile doesn't leave your face! The car is still pretty light at just over 3k, so the addition of 80-90WHP (about 60%) makes a huge difference in feel. But keep in mind that it costs roughly $5k on the low side for the setup, which is anywhere from 25-50% of what the car is worth, premium gas is required now, and it's hard to go back to stock if you think it's temporary. In the 4 years i've been turbo'd and talking to people about it, i've found that if your plan is more than 6 months (it's more like 3-4) out, then you won't get it. If you have 90% of the money in hand and are serious, go for it, but if not, there's not need for a billion questions that don't go anywhere, please just read what's on here already and enjoy the dream (it's cheaper!)

This link will always show you all the current topics for turbo's on the 6i's:

Turbo threads

here's a few vids that have been around forever, but if you are new you might like them.

See less See more
  • Like
Reactions: 1
1 - 20 of 164 Posts
if you google "HASS turbo mazda6", you will be led to the site. it's no longer listed, but they were the ones that took over the setup from HASS originally, so if you want it, it's the only place that may be able to get it for you. The HASS kit was the best produced kit in regards to fit and finish, it truely was beautiful, bends, piping, fittings, sizing....all of it. BUT, I had one of the member here take his car in for the design of the kit, and after a year the car still wasn't driveable, lots of issues with the Emanage, so i've always recommended their kit sans tuner and find your own option.

engine mounts fall into the performance mod range, nothing to do with the turbo. The kit will act absolutely no different with or without upgraded mounts. They are nice, but some don't like vibrations, some don't notice it, some want hard, some want soft....but none of those things have to do with a turbo. they are more for shifting feel and car balance a bit, as when you get on or let off the throttle quickly, there is less weight transfer.

thanks for the input, i'll try to update more info as i think of stuff, this was a 15min thing before i left for work today.
See less See more
please read the first question in first post, answer #4
just hold tight on the F2 kit, tuning is holding things up currently as new options have come up and they are playing with a couple different things to see what works best with what they want to get out of it. unfortunately the same tuning used on the 3 isn't working on the 6, so the work put into the turbo and supercharger kits on the 3 can't work across the platform to our cars.

Ricardo called me last week and i just haven't gotten a chance to get back to him yet. i'll try to get back to him in the next couple days and see if we can get something in the works again.
you can hold onto the header and whatnot as well and just wait for the SC if you want. working well on the 3, but again, just figuring what tuning is gonna be best for the 6 at this point.

and i completely disagree with the speed comment, as i have for the last 3 years. though it depends on what you use the car for, i know in socal and road race events, the 6 is FAR from better than the 6i on boost.
i believe Biz is thinking you mean 180whp, and there is no chance of that without several more mods and some good tuning. the stage1 kit puts the car at roughly 220-230bhp, which leaves you around 200whp for the most part give or take. the SC would produce a bit more, though the stage2 will have more potential still.

but 180bhp translates into roughlt 150whp, which can be done, though hasn't been done often with so few mods.
nothing that i've heard. F2 has sent out 1 turbo kit that i know of, but that wasn't for a US ecu, so not sure how that played into it. they've had my car for a bit now, but it's a lot different than just installing a turbo kit on mine.
mislabeled, it's for the 626 given the other info. you can contact them directly to confirm if you'd need a GUARANTEE that it's for the MZR though.

nothing is going on with Hiboost. only way to get anything from them currently would be if you were in Florida and hit up Manuel, who is the the brother of the owner of HiBoost. he has access to the parts, but unless you are local and can follow up often, there's no point.

continue to hitup F2 for more info, you can also see if TriPoint decided to figure out a solution for our ecu as of yet.
...and if anyone in socal is interested in the turbo or SC you can get a decent discount and free install if you let F2 use the car. i believe F2 is playing with the CPE SB2.0 for tuning right now to see how it's working, think it's been good so far.
yes, it is a pain unfortunatly...

there is currently no off the shelf turbo kit available for the 6i. If you are in SoCal something can be worked out with F2 pretty easily, but until there is a local person it's still on hold it would seem.
  • Like
Reactions: 1
the shop in Florida is called TBK Performance, you can verify your distance from there i think.

a lot of Cosworth stuff works actually, just depends what you want and if you want to tweak anything. the SC should "bolt up" to the engine, but ours is transverse, so clearance might be an issue, and their tuner does not work with the 6, so that would need to be figured out.

my car is an '03, standard ignition setup back then, before COP advantage or loss there from what i've seen though.
speed6 is Direct Injected, so the intake manifold is no go, ports all different.

hot side is good though.
hopefully it works out, those issues have always been a big issue with this kit.

let us know how it goes, and keep an eye on your plugs as adding an extra injector(s) doesn't always mean every cylinder gets all the fuel it needs...especially in a manifold as intricate as ours.
i get bored in a straight line, so i really don't have a clue on what mine would run....last time i ran i was 17.1. best run with the car has been 16.2 i think....all about 5-6 years ago.

i don't suggest you use my car as too much of a reference for anything, as not much is Mazda any longer. When i ran the 260whp it was on 10psi as the clutch wasn't holding. i've run up to 16psi on the track...and i've cracked to bell housings doing it. now the mounts are good, but i haven't had a chance to drive the car in a long time. the block is good for 15ish psi, my old IHI VF22 was only good for 18-20psi...not really sure the specs on my new MP turbo is now?

HiBoost got over 500hp on just fuel tuning and into the 11's i believe on his 2.0L down in Brazil. so if driving for 12 seconds is exciting for you, then possibilities are there.
which gauges, what color....? (though i think the main page is jacked, google it and you'll find the link)
  • Like
Reactions: 1
It really seems like you really just want a 1/4 drag queen.

Some people actually like to do road courses where it actually takes skill rather than just driving in a straight line.

Hell, if I wanted to go in a straight line for countless boring hours, i would have gotten a mustang.
i'm not sure if you've ever gone to the strip, but there is actually plenty of skill needed to be "good" at it. though the car plays a bigger roll than in some other sports, it still takes practice to do well.

...i just need more than a few seconds to get my rocks off i think. that's why i gave up autocross too, a 30-60min course is just not worth my time.

just don't want this thread to be a fight about what form of racing is better. it's about putting a turbo on the 6 and having whatever fun you want with it.
i replied to the pm, but for others reading...

give me a couple weeks and there should be more info. the kit on my car is an EASY bolt on, no brainer, if you can change your springs you can do this on your own.

the 2 biggest hurdles are my car....i don't have a stock exhaust, so not sure how close it will be AND the tuning will be on an '03 ecu (so unless you are '03/04 it might change).

if anyone in SoCal is interested and has their stock exhaust hit me up and i might be able to work out a deal and arrange install as well. ideally looking for an '05-07 and/or '08+

...guess i need to update post #1 since it's too hard to find anything anymore
no solid options on the market right now unfortunately. i have the new kit that will be available through GPWerks, but with my trans out of commission still we haven't been able to tune it.

but if you can afford <$2k currently, i'd save up for quite a while as even the cheapest kit will cost quite a bit more in the first year typically. things like tuning and gauges add up REALLY quickly. when you have 4-5k to blow, and plenty of time for the car to be down, start looking.

any i'll let anyone drive my car, just come on by.
the thing that i want to try this year is nos. am thinking you have to stay under a 50 shot but i feel it would give it the power you are looking for and around 1200.00 all said and done. i could be wrong but but this is my first mazda 6 i was in to the 70s 80s v8s but ready to try new things so i will run in to i might be the guy that needs all the help.
what's this got to do with a turbo big mike? you can search the 2.3 section for nitrous if you are looking for input on it, or start a new thread if there are specific questions you might have that don't apply to this topic.
1 - 20 of 164 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.