What you need to make 400 horsepower on a mazdaspeed 3/6

[@Reed_0024]

Great vids my dude.. 10 things you forgot to mention to truly get 400hp. 1st, you will never get 400 hp on a stock KO4 Turbo. Max will be ~320hp with full bolt ons and aux fueling like meth or e85. And no , you don't run them both at the same time. 2nd you will need a tune after you start increasing flow, so after intake/internals or adding new Down-pipe or exhaust and so on. I recommend an etune like Purple Drank / Freaktune... ect ect.. 3rd , you need a FMIC. I recommend a Treadstone TR8 or better. A top mount will never net you 400 hp as it will always get heatsoak but a FMIC is 100% needed. Great work on mentioning a port and polished intake mani and don't forget to do the VTC delete while pnP the intake mani. 4th , step colder spark plugs at the correct gap of .26 ~ .28mm. I recommend the Denso's step colder plugs. 5th SWAS delete. The MS3 will cut fuel around 330hp as you start to get more power, you get more torque steer. The swas will cut fuel to the car to get a handle on steering. 6th, Bigger turbo. As mentioned you will not get over 330hp on a KO4 turbo. I recommend a BNR s4 or better as a BNR s4 will max out the stock block's safe capacity for power. Do note, even with a bigger turbo you will not reach 400hp unless you add aux fueling. I recommend e85 as its a whole lot safer then Meth injection. If you live where you can not get e85, then meth is a fantastic option. 7th, 3.5 bar map sensor harness and adapter.. To reach 400hp you will need boost higher then what the stock 3 bar can read. 8th, Electronic Boost Controler (EBC). This will replace the crappy stock one that can't handle over 20psi. I recommend the cobb ebc or similar. as they are all about the same quality and price. 9th, well this is sorta mentioned, but you do need a 3" Down-pipe and exhaust for maximum flow. The cheapest I would go is the CNT setup. It is great quality and give the the ports for the O2 sensors so you don't get CEL's. Skip ebay and amazon unless you want check engine lights that will make you fail inspection. 10! Not fully needed buy might as well do it.. ERG delete kit. With all these upgrades and the ones you mentioned you can sit at a comfortable 400hp. You will not get above 400 as you will then need 5th and 6th port injection as you are fully maxing out the air and fuel capabilities of your MS3/MS6 at 400hp . That is all for now.

[@Reed_0024]

Steven Devey. Have you done any of these mods? Should do a version 2 of the 400 hp quest . Vids are very informative and the vlog style you added takes things to the next step! Keep it up. the MS3/MS6 community needs more vids!! Zoom Zoom my dude.

[@rh2racing]

Can you cut and paste that and send it to me? I'm working on a ms3 right now and want to try a couple things.

[@Jonathancrv]

What is the max boost mazdaspeed3 stock???

[@torek997]

1,3b from k04

[@fernandorivas5059]

My Mazda 3 not Speed is turbo tune but I am looking forward to upgrade bigger turbo. The issue I have is I need to upgrade my clutch because it is still stock transmission 5 speed manual and running strong with turbo kits.(Not am fan of hatchback on Speed3 but I like Speed6 not fan of headlight. So Mazda 3 looks perfect for me)

[@kdog5471]

Actually since the car uses a MAF sensor the car comes with a "bypass valve" where it recirculates the air instead of VTA. Running a 100% "blowoff valve" will make your car run rich and just not ideal. What you really want is a Turbosmart Dual Port valve where you can do 100% either, or 50/50 where the blowoff sound is there but your car still runs like it should!

[@bkphil89]

Kaine Gunn mehh .. i know plenty of ppl who ran full vta and it their cars ran slightly rich.. a few extra pops but no worse for wear

[@Luminary_Industries]

Kaine Gunn You can run full vta on these cars. Many believe you can't, but you can. I have the turbosmart dual port 100% vta. I always say. It's within the tune or tuner. Pops are fine and amazing.

[@NewDemons666]

I got a gfb respons bov and im gonna run it 50/50 or full recirc and see the difference. Might try out VTA just for the shits and gigs

[@itzlizpy]

Thought I'd share my list just in case anyone has any suggestions or just to share builds :D love my 3 -Cobb bypass valve -Mishimoto m line fmic -Cpe intercooler piping -Custom crashbar from therpmstore -Corksport short throw shifter -Cobb 3 inch catted downpipe -Corksport 3 inch non muffler catback -The mid pipe is still 2.5 but no resonator -autotech high pressure fuel pump - corksport short ram 2.5-3 inch intake Oh and a Cobb tune access port

[@StevenDevey]

Thank you for sharing! Love it! Miss mine :(

[@itzlizpy]

@@StevenDevey ah no! What do you have now??

[@planetscott1]

I've heard multiple stickers and graphics add 55 HP....Of course, that's on a Honda or Subaru.

[@StevenDevey]

planetscott1 Mazda’s actually make more power. About 80 hp per sticker

[@farmonious420]

Great vid Steve. I did up my Speed6 almost the exact same procedure. One of the best mods I did for free was to eliminate the clutch safety ignition switch. The DISI is notorious for blowing out the main bearings. Not dry clutching on every start extends their life big time. I even built it into a hidden kill switch. Don't tell anybody. Keep up the speed love. I know the STEVESPEED has come a long way since this vid.

[@infadelakainf]

How do you eliminate that switch

[@farmonious420]

@@infadelakainf I pulled it off the clutch pedal assembly, cut off the OEM switch, and extended the wires to a toggle switch I mounted under the dash. There's only 2 wires so it ws easy, not alot of electrical knowledge required. Or you can just pull the switch off the clutch pedal assembly, and wire them together, for a permanent "ON'. Good luck. Enjoy your Speed. Stay Happy and Healthy

[@bkphil89]

Biggest thing you forgot is FUEL FUEL FUEL..... thats the biggest issue when it comes to making power with the speeds.... meth is probably the cheapest way.. but a 5th and 6th port(or if you want to spend money a port injectiin kit) along with at least a bnrs3 and the car should break 400..

[@jadenteague3413]

First thing to get is a high pressure fuel pump. No if, ands or buts about it.

[@numinous4789]

Second is auxiliary fueling, whether WMI or PI, because even with HPFP internals, the injectors themselves become bottlenecks at 370-380whp on a very well-flowing setup (which also necessitates at least a 3" or higher intake, upgraded intercooler system - the stocker is another major bottleneck - and a full 3" DP/exhaust if you expect these numbers on mid-sized turbos. Larger turbos can push through some of these limits, at the cost of efficiency and longevity. Third is a turbo capable of moving enough air. You'll need at least a BNR S3 or a CS turbo. Any Garret GT2871 or above with work. A PTE5558 will have no trouble either.

[@SmallSonEZ]

hpfp into PI. Idk about that one bud. Feel like there at least 10 mods before u get that PI.

[@itzlizpy]

Seriously was one of the first I got along with a short throw shifter. Then went for everything. Pays off in the long run

[@ChipsMcC]

My 2007 cx7 has almost the same motor. Saweeeeet

[@dashowdy]

Accessport V2/V3, test pipe or downpipe, intake and inlet, hpfp internals, E85 tune, done. At that point a aftermarket BPV and some motor mounts would be a good add on as well, at the very least the rear to start, also an tmic upgrade is about all you need unless you wanna go big turbo otherwise the spool up penalty of a front mount isn't worth it. I run a stock sized intake and inlet and make well over the 300 mark easy, you may get a 10 hp benefit out of a 3 inch intake but the 3.5 is just beyond the efficiency of the K04. An accessport is a great first mod along with the rear motor mount, then go from there.

[@StevenDevey]

matthew smith I really like the insight! If E85 is available that’s a perfect mod list!

[@playcer8388]

Found a turbo mod on the internet. New exhaust and that turbo easy makes 450hp :)

[@mrohhhkillem9048]

Where info ?

[@izzyaydee4746]

It’d be great if you had pictures or videos of these things

[@alexanderlanger6479]

hey steven, i love ur work. i like u and ur car. only m6. keep that work. maybe you'll open the engine anytime to show us more =).

[@StevenDevey]

Alexander Langer thank you so much! It really means a lot! And yes I plan on building my motor this summer!

[@TheJMan1K]

What would you say all this would cost? I’m about to purchase my first car and I think a Mazda 3 would be my best option due to cost and reliability. Also an affordable aftermarket. Was also eyeballing used Lexus IS350s but they seem to lack a massive aftermarket support.

[@StevenDevey]

KidsOnALeash OnABoat the Lexus IS is a great car but it would be hard to make lots of power on a budget. The Mazda 3 is a good choice but you won’t want to mod it at all. If you want a platform for power and reliability you have to get the mazdaspeed model.

[@TheJMan1K]

Steven Devey I’m blessed to have family that can cover a decent amount. While I wish to stay as low cost as possible a used Lexus with low miles can had for around 12-15K which isn’t to bad lol. Im thinking a decent tune up and upgraded bolt ons could bump the horses. Another car I was considering was a classic SC400/300. Appreciate the recommendation of the Mazdaspeed. Will look into that.

[@StevenDevey]

KidsOnALeash OnABoat if you are looking for the most potential in a platform, than a mazdaspeed is by far the best car. It’ll make more power than any of those other cars for way cheaper. And get better gas mileage

[@TheJMan1K]

Steven Devey thank you

[@TheJMan1K]

Steven Devey what’s the reason behind not modding a Mazda 3? I see plenty of tuneups and aftermarket available.

[@alexkir4303]

No turbocharger upgrade, no intercoller upgrade??? Dude!!! You are genius!!! 400hp with intake, blow-off (of course!!! :))) and exhaust! You can tell all the tuners for mazdaspeed, that they are stupid cat-skinners!!! )))))))))))))))))))

[@ItsaWay14]

your so close to the camera; back off dude.

[@joev7587]

Nice video

[@r0bz420]

You need the fuel pump, who cares about intakes, they don't add anything. I would say you need fuel pump 1st, then motor mounts and transmission,next the brakes,axles,then go with the clutch. You can drop in bigger turbo and down pipe, then you got you 400.

[@IAMRGGOD]

I dont wanna spend 800+ on an exhaust system, and i want mine to sound like yours help

[@StevenDevey]

fokin just a downpipe that is 100$ will get it to sound good and add some horsepower! After that you can get a custom exhaust for like 200$ and you’ll be where I’m at!

[@IAMRGGOD]

i feel like if i go to an exhaust shop they would make my car sound tinny if thats even a word, also i want blue tips like yours but shorter ive been looking all over ebay/ amazon still cant find any for speeds

[@StevenDevey]

fokin if you find me on instagram I can help you more in detail but the exhaust shop will do whatever you want they just won’t mess with catalytic converters (cats) but the downpipe is what replaces the cats, so you just tell them to remove the muffler and resonator!

[@dashowdy]

test pipe and muffler delete and it will sound like an old rally car, or at least upgrade the stock muffler to an aftermarket. TP is maybe 80 bucks and a muffler swap at a local shop is maybe 125 to 200 for a decent muffler, and it will be smaller, lighter, and sound better than the stocker.

[@StevenDevey]

matthew smith that’s perfect for the exhaust! keep it simple!

[@djjkc42]

just port your intake... port match, GASKET match. if you can port the intake and exhaust port on the cylinder head. the rest??? ya...... tbh if you have a welder and the right tools you can make all of the exhaust side..(takes time though)

[@Lv4LAX]

So what do we know about e85 on these cars? I see a lot of stuff about e85 mixes but not 100% e85. If I put in a HPFP, bigger fuel rails, injectors and lines can I run 100% e85 without worry? With a tune of course

[@StevenDevey]

So I’m not 100 percent sure but I think you would be able to run full e85 but I think if you aren’t driving the car very often if the e85 sits than it eat through some stuff, I think that’s why most people like to run 50/50.

[@Lv4LAX]

Steven Devey cool thanks for the answer, I have two buddies running e85 with the exact setup I just describes and they have no problems as long as it doesn’t sit. They have different cars though

[@StevenDevey]

Lv4LAX no worries, and I think you’ll be good to run full E, also when you are going to get tuned the tuner can help you to make sure the E is right for the set up!

[@Lv4LAX]

Steven Devey yeah no doubt! My buddies use the same tuner, and he does ms3’s so I’m sure he can do my ms6 lol, he tests the E to make sure it’s quality and everything

[@bkphil89]

You can run 100%e85.. but youre going to be cleaning black gunk from your hpfp quite often....also with direct injection its not like you can upgrade the injectors anyway.. the juice isnt worth the squeeze to run 100%e85 in anything less than a dedicated race car... the detergents in the 93 helps keep the hpfp clean

[@hameedsrt9095]

How much hp does ur car have now u finna do a Dyno later

[@xh0rseyx355]

For 400, just run a bnr..400 is steep on a little k04

[@StevenDevey]

Justin Dorsey A bnr S4 is perfect, stock turbo won’t be able to make more than 340 wheel hp

[@thamsanqandlovu2966]

Guys at 400whp wats your 1/4mile time range in a ms6?

[@marcoteixeira2109]

hi great video what sort of power am i looking at with corksport air intake/ hpfp/ 3.5 map sensor /exhaust manifold /decated dp and full cat back exhaustand versatune roughtly? i got rear motor mount also alredy

[@joserotary9636]

Good info, keep it up

[@ericischillin2109]

Nice work on the car Steve but you should upgrade to evo x

[@StevenDevey]

ERICISCHILLIN haha thanks bro, and Evo would be dope but they are just a little expensive!

[@speeddemon2152]

How do you get the POS KO4 to stop smoking AKA smoking turbo fix?

[@dallasmellsop5488]

Turbo seals

[@hankhilll4651]

you'd need aux fueling and probably a bigger turbo to make 400...

[@robbyrobmestas8403]

What about the intercooler and bigger turbo u can't make 400 on stock turbo the most is prolly 370 to the wheels

[@StevenDevey]

Robby rob Mestas ya definitely you will Need an upgraded turbo and upgraded intercooler

[@bkphil89]

Not even close... with meth you MIGHT get about 330 ish whp on a 3 lol

[@ibetatestedyourmother]

Most I've seen on meth for cooling was 322whp on the ko4

[@StevenDevey]

Speed3 NutBag ya that’s a good amount from a ko4 the stock turbo doesn’t make that much power

[@ibetatestedyourmother]

Steven Devey that is stock lol. With meth for cooling. Small bolt on part list. The most I've seen on a stock k04 turbo.

[@derekanthony1731]

Thanks

[@jabbaweezy]

Funny seeing you here Derek lol

[@choppinyacht9033]

I wanna just run open down pipe 😂😂😂

[@JoseEliseoGomez]

Hi steven, 400hp with stock tyrbo or u need to upgrade it?

[@StevenDevey]

Jose Eliseo Gomez you’ll definitely need to upgrade it, stock turbo is only good for about 300 hp

[@matth510]

Steven Devey ive heard of people pushing the stock k04 to 400hp

[@StevenDevey]

matt hall id like to see that, I’ve never heard of a stock turbo going to 400 hp

[@sleeper.simulant7327]

From what I’ve seen from Stratified tuning a Speed6 with every bolt on keeping the stock turbo and no meth injection will make around 300 whp at sea level. Add meth and you can get probably 315 whp at sea level but that’s the absolute limit on the k04. Full-Race and BNR both make great turbo kits that can achieve 400 whp. I personally like Full-Race’s kit the most from what I’ve read, it’s purely my opinion though, Full-Race costs more then BNR I believe, and BNR has served many well.

[@hallowrdean7409]

@@StevenDevey I’m sure someone has done it, but I doubt their car is still alive lol.

[@dashowdy]

also he means 400 bhp and not whp.

[@StevenDevey]

matthew smith with the big turbo and E85 I was estimating 400 wheel hp.

[@dashowdy]

Yeah with a BNR S3 or higher or GT series equivalent, its a question of how long the block will withstand it dependent on driver also. They put down good numbers but the amount of mods and money needed for that extra 70 wheel horsepower or less over a k04 bolt ons E85 car may or may not be worth it for some dependent on mileage and if you have funds set aside or not to rebuild a motor just in case. When my stock turbo gets replaced at 115,000 later this year I am getting either the billet wheel upgraded K04 or a BNR S1. I like the response down low and big turbos won't replicate that for the around town driving I do.

[@TristinWilliams43]

400bhp is the same thing as whp. You mean 400 at the crank

[@danielb8378]

Tristin Williams bhp is crank hp not whp

[@theweldfathertutorials4860]

oh god... he said eBay downpipe....

[@Kyle-yu9he]

How much does all that go for

[@StevenDevey]

McJesus probably about 3000$, if you get some good deals you could do it for 1500$

[@Kyle-yu9he]

Steven Devey that’s actually not to bad I just got a 2006 speed 6 and ready to start modding soon

[@heartseasebliss1152]

Hpfp with a ap!

[@snottyboy9983]

Lmao how bout my cx7

[@travboogie247]

😂

[@snottyboy9983]

@@travboogie247 you laugh but it is the same turbocharged engine and all wheel drive system 😂

[@Aramis_Production]

What you need to get rid of those 400 pimples?

[@saiyanwarrior15]

Not even remotely funny.

[@elijahwilliams7062]

youre a goofball 🤣🤣