10 Subaru Modification MYTHS ..... BUSTED !

[@DarkWolfWRX]

So many more people need to see this video. I don't know how many times I have had to tell people many of these things. Especially on the vent to atmosphere BOV. An reliability. Of all cars I have owned, only ONE has not lived up to the tried and true saying of "Take care of the car and it will take care of you." An that was my R56 Mini Cooper S. But that's another story 😅. Too many people mistreat their Subaru then scream "SuBaRus ArE TrAsH!" The end of the day, internet people suck 😅

[@racedynamix]

100% with you. I had an Audi a while back. Awful unreliable p.o.s. Lol

[@Mr_Jingles_147]

Myth 11 - you need a front mount intercooler on a WRX to make over 300bhp. Myth 12 - you can't make 300+ on a TD04, Myth 13 - you "need" a Perrin silicone intake pipe and Ecutek to map a newage wrx Ecu (Scabby Colonic). I think part of the Facebook problem is the sheep mentality. Things spread faster and wider than the old Forum days, so it doesn't take long for bad advice to become mainstream. Would be good to do a round up of good/bad/not required mods, like intake pipes, chav valves, intercoolers (wrx/sti/fmic), exhaust side (2.5 vs 3"), fuel pump/injector size and limits, options on stock ecu's vs aftermarket. 👌👌

[@racedynamix]

I sense a part 2 coming 😂

[@Mr_Jingles_147]

@@racedynamix be careful with that, you've already shattered the hopes and dreams of 1/2 the Facebook legends who love to preach the equal length life haha

[@Scoob_Heartwood]

A front mount is "advised" because if you're planning to push 350+ whp youre going to start seeing heat issues and instead of buying a top-of-the-line TMIC that is capable of 400+ people are planning ahead and getting a FMIC to combat heating. I dropped my driving Temps by roughly 10-20F just from the FMIC. heat soak is a real problem with subarus. Are they needed? No. And yes it is true the stock WRX turbo can handle 300+. I am using stock turbo @ 382whp on 92 octane @ 19-22 lbs of boost.

[@Mr_Jingles_147]

@@Scoob_Heartwood on a TD04? That's an incredible amount of bs you're smoking 😂😂

[@racedynamix]

I have seen that on a hybrid td04 Stu

[@prettyvacant09]

Me and my 18 STI thank you for posting this. Please make more

[@racedynamix]

My pleasure.. So many more vids planned out which I am really looking forward to filming. Watch this space 😊🙏

[@Mr_Jingles_147]

Myth number 7 and 10, do you remember my 1 owner, 241,000 mile Hawkeye with the "chocolate" 2.5 engine? You mapped it at 238,000 on a TD04, then 241k on a VF24. It did another 40,000 miles before someone did a rebuild, purely due to age/miles.

[@racedynamix]

I certainly do.. And on the original clutch too 😱

[@paucatuman]

'People talking rubbish on Facebook' no, surely not 😯😯 Good post Duncan👌👍 Keep them coming.

[@racedynamix]

Cheers buddy. Love the things that the Facebook 'experts' come up with 😂

[@David-xc4us]

Good vid that, I’ve learned a lot there. I miss the old forum days as most the info was good, I’ve given up with the rubbish on FB 😂. As for the last myth I had my hatch STI let go at about 70k, not modified, that required a £6k rebuild but it hasn’t put me off the 2.5 as I think it’s the best all round drive compared to every other scooby engine, here come the import comments about equal this and twin scroll that, but it’s just my opinion hence I now have a FOZ STI that has got forged piston, oil pick up etc and I absolutely love it

[@racedynamix]

I love my foz sti too.. Awesome car 😍

[@golfmk2]

Very interesting and informative video. I wasn't aware of the issues that can occur on track through hard cornering.

[@racedynamix]

Snetterton in particular (on a Subaru).. Coram is an engine killer 😱

[@golfmk2]

@racedynamix yes I can imagine! I actually have a video of me attempting Snetterton in my R32 Mk2 Golf and was pre-warned it can kill your engine. Fortunately I'm far too slow and rubbish to have gotten anywhere near the point of the oil not being picked up in the sump. I also just made sure it was well topped up. 😁

[@chandlerbraaten847]

Myth number 11. All Subaru owners vape. That one is the most annoying imo especially since i typically see more vape clouds rolling out of GTI's than STi's. 😂 Great video as always.

[@racedynamix]

🤣

[@PedroFTeixeira]

#5 I installed Scoobyworkx on my My99 when the stock one got damaged. And had to remove it. It spooled really hard, but then it lost a lot of bost and then got back to boost. I was very wavy. Had to go old school, with a manual controller.

[@racedynamix]

It should have been easily controlled by your mapper... Way better and safer than a manual boost controller imo

[@Danilad89]

Just subscribed mate, this is my new favourite channel. quick question mate will revving the car on launch controll break it i dont launch it, its just to show off really

[@racedynamix]

Hi Dan.. Thank you 🙏😊 All the good stuff is harmful as a rule.. and holding on launch control for a prolonged time is definitely not 'good' for it as heat builds up in headers and turbo and there is no airflow to the intercooler. A short burst to show off though shouldn't cause too many issues depending how severe the launch control is 👍

[@mynopensd]

Hi, love your content and more importantly how you deliver it. Top job, much appreciated.

[@racedynamix]

Thank you so much. I am not a natural presenter but am learning how to do this KZbin thing so comments like this really help. Thanks 🙏

[@MrGreenperil]

Good vlog duncan and hopefully educate some of the forums subaru advice disasters i often see.👍💥💨

[@racedynamix]

Thanks Paul 🙏 That's what I am trying to do here.. Educate and try and improve how I do the vids 👍

[@joecam7109]

Bah! My 2006 STi (EJ257) has been very reliable, has never left me stranded, the only downtime it has seen is just because of wear and tear parts that I’ve had to replace. No headgasket problems, no ringland issues, you just have to take care of them, tune for your parts and not drive like a lunatic all the time.

[@racedynamix]

Absolutely 👏👏

[@DaytonaRoadster]

i thought equal lenght headers on a EJ was more to remove the hot spot on cylinder 4?

[@racedynamix]

Hi. I can't see any logic in that tbh. The runner away from the exhaust ports of cylinder 4 would be almost identical on equal length to unequal length. Thanks for watching and for the comment 🙏

[@joecam7109]

Myth 11- All Subaru models suffer from headgasket problems. - Nope, that’s an old sohc naturally aspirated model 2.5 problem that got stigmatized to everything Subaru. The old n/a 2.5 engine that Subaru used in various models had a defect in the materials used to made the headgaskets which made them prone to failing. The fix? Using the oem turbo model’s factory Multilayer Steel gaskets. Can they blow up too? Sure, with enough abuse, overboosting and heat it is very possible…just like with any other car.

[@twinscrollbugeye]

I've done a few track days with my 02 STi on semi slicks and I've got full oil pressure even around the highest g corners. Do I really need an upgraded oil sump?

[@racedynamix]

You need to drive faster 😉 You will see oil pressure drops. It is possible your oil pressure gauge is slow to react though 👍

[@jordanroth567]

👋 I have a 22 wrx and I wanted to put a partial vent to atmosphere blow off adapter on it. So is it ok for the car or should I not put it on to keep the engine healthy? Thanks!

[@racedynamix]

Hi Jordan. Unless your vta is leaking or you are replacing a dump valve that was leaking and Tuned around with one that isn't leaking now, there will be no difference in fueling on boost. The only difference is a noise when lifting off and a slight enrichment when you put your foot back down because you have vented some metered air that the ecu has calculated needs some fuel to go with it. I would say it is fine.. But data log what is going on or get your tuner to check to be 100% sure

[@murraykoller6041]

Importing a 2007 Forester sti from Japan to the uk it is stock and i was told it ok to run it on shell v power without re mapping it. Is this not true?

[@racedynamix]

Hi. I did all about "JDM imports needing mapping".. It has all you need 👍 Hth

[@fullmoonproduction9336]

So for myth number 1 i should be able to put id1050 on with no problem until tune?

[@racedynamix]

Obviously not.. they would be approximately double the size of the std injectors. Going up from 420cc to 550cc doesn't mean that the car can't be driven to the mapping session though. Having said that putting the id 1050 injectors on an sti it will be drielveable for a short distance to the mapping session so long as your lambda sensor is working.

[@fullmoonproduction9336]

@racedynamix thanks for such a quick rely. I was hoping I can so I can check for leaks before I take it to tune

[@racedynamix]

@fullmoonproduction9336 if you have an adjustable fpr you could turn the pressure down temporarily to make it run less rich 👍

[@derzzzz]

Random question, but did Subaru ever sell the VA WRX in the UK? Or just the STI?

[@bunsofsteeeel]

Just the sti

[@racedynamix]

Yeah, just the sti as @bunsofsteeeel says 👍

[@zeroyon4562]

Good video. Fitting a 6 speed needs a remap? Lmao. I did have good results in midrange power moving to equal headers on my v5 type R though (verified by dyno), they were 4-1 by SYMS, quite a nice piece.

[@bunsofsteeeel]

So I can fit a dump valve to my 2017 sti without a map not sure it would run so great in my experience but a dual one that partially vents and recirculates should be ok thanks for the info

[@racedynamix]

It will not change anything about fueling, boost or ignition timing requirements unless that dump valve is leaking.. It just creates a noise. Obviously, as explained in the video, the only difference is at that instant you put your foot back down on the throttle where, because you have dumped metered air, it will run momentarily a bit richer.. A mapper cannot map that out without negative impacts elsewhere in the map on transient throttle response. Thanks for the comment 🙏

[@bunsofsteeeel]

@@racedynamix thanks Duncan please keep making videos

[@CrazyCat229]

For the newer BRZ 22 what mods do you recommend if I plan to autox and maybe track day it to protect the engine?

[@racedynamix]

Hi Jordan. Nothing specific for the brz I am afraid but generally there are 4 issues to solve for track days.. 1. Oil surge. The Subaru sump isn't great for cornering, it is better with the later versions though. It is expensive to solve this but probably the best idea is just to monitor via a gauge and check levels continually during the day. 2. Fuel surge. I am not familiar with the fuel tank set up on that car but all other subarus have the fuel pick up on the rhs of the tank and most tracks are clockwise so naturally dragging fuel away from the pump. Keep it topped up to reduce this risk. 3. Heat. Both coolant and oil should be checked I would say after each session to make sure levels aren't dropping and aim modifications at reducing temps. 4. Brakes. They can overheat on cheap pads (or std) and cause judder as the pad binding resin leeches onto the disks. Some proper pads and braided brake lines should solve this. I hope this helps.. Have fun 😎

[@CrazyCat229]

@@racedynamix Thanks. Was planning on doing oil baffle plates for the oil pan, oil cooler since the car lacks one and of course changing out the fluid and the pads and lines and rotors.

[@racedynamix]

@@CrazyCat229 I will be doing an in depth video on track day prep soon 👍

[@stephngibson5517]

I really think you need to make some kind of video on ELH because ive never heard anyone say that before

[@racedynamix]

Filming something next week on those.. Really looking forward to it 😎

[@accgamez]

I was wondering why do you need a tune for a 3 port boost controller?

[@racedynamix]

Bit too complicated to put in a reply on here.. But I will do a video on this at some point. The turbo makes boost easier with a 3 port so would have th potential to overboost or at least take the car to parts of the map that it wouldn't see on a 2 port solenoid. 👍

[@miguel_rocha_]

Great Video as usual Ducan, all cars have Myths , but the like them all 🤣

[@racedynamix]

Very true 😎🙏

[@dorianleclair7390]

In my experience head gaskets have not been a big issue unless it's been overheated or a lot of power on stock head bolts.

[@racedynamix]

👍

[@markarlie7644]

One thing id love to know ... 2.5 inch exhaust vs 3 inch .. is there much gain / 2.0 jdm hatch ... worth it or not ?

[@racedynamix]

Worth it 👍 Simple answer.. Would be difficult to swap out for video and test exact results but from my experience at over 330 it makes a good difference 👍

[@IIIIMOOSEIIII]

Erm.. i like my bottom end thank you. Any solid upgrades to prevent head gasket 😅

[@racedynamix]

Tricky one that. Because the aluminium blocks wiggle a bit they will eventually fret away anyway but many things can make that happen earlier such as increased cylinder pressure from extreme detonation spikes or running high power. But a head gasket change isn't that big a deal nor refreshing bearings before they actually go ie at hg change time. It's the cost when big ends do go that is the killer with new crank, oil pump, modine, sump, rods etc

[@davidwills4898]

Will mapping in a 3 port on its own, make any difference on an already mapped car?

[@racedynamix]

Yeah, the amount of wastegate duty needed in the map tables is most likely to be less. It would probably overboost. Or it would go to areas of the map that javrnt been seen before.. Potentially dangerous 👍

[@vasegan]

hi sir, do you do remote tuning? i have tactrix and wideband.

[@racedynamix]

I don't I am afraid but I will be launching a mapping academy on here soon to help you tune and offer support, live questions and answers and feedback on data logs etc. Stick around it might be what you are looking for. Where in the world are you?

[@vasegan]

@@racedynamix thank you sir cant wait.

[@M1.942]

Hi mate I’ve got a 2003 blobeye STI jdm, where are you based ?

[@racedynamix]

I map at various dynos in the UK 👍. Where are you based?

[@M1.942]

@@racedynamix Do you also do maintenance and rebuilds? Am based in Sheffield but up for a travel if the cars in good hands

[@racedynamix]

@@M1.942 Hi. Yeah 👍 gimme a call and we can chat through what you need 👍

[@M1.942]

@@racedynamix perfect mate can you send me a link to your page

[@liamc666]

Hi m8 , I have a sf5 s turbo fozzy , been trying to get a map and don’t seem to be getting anywhere I have a fmic I want to install have already fitted a 3”down pipe with sports cat and full 3”system but don’t want to do much more until I get a map set up . Is this possible on the standard ecu ? Thanks for all the in depth info on these beautiful cars .

[@liamc666]

Oh yeah , is it possible to fit a 350lph fuel pump without any other mods ? Does it help the stock system or more a hindrance? Thanks again

[@racedynamix]

It should be OK to do that without any other modifications.. At worst it will run a little richer 👍

[@racedynamix]

Hi Liam. The Foz sf like all foresters is a parts bin car. It is mappable but depends on which type of ecu it has as to how expensive.. Easy quick way to check is under the dash at the green test mode connectors. If there are 2 wires to these plugs then it is more expensive unfortunately.

[@liamc666]

Yeah it has the green ecu test wires . Thanks for the quick reply and another two behind the sill panel passenger side . Thought with it being the turbo s 177bhp it would be a better ecu than the lesser specd cars

[@racedynamix]

Does it have 2 wires to each plug or just 1?

[@paulthompson4891]

Another great video keep them coming thank you for working on my car

[@racedynamix]

Thanks Paul 🙏

[@tjlovesrachel]

Why does the bottom end go shortly after the head gaskets?

[@racedynamix]

Difficult to say really. But possibly either heat damage that caused the head gasket failure or caused by the gasket failure also breaking down the oil.

[@tjlovesrachel]

@@racedynamix ahhhh okay gotcha so it’s either gotta be like a real catastrophic head gasket failure or have coolant in your oil….because my 17 sti is starting to pressurize the cooling system (no milkshake )and I’m currently assembling all the parts to do the job plus some others to do while I’m in there along with a few upgrades… I was worried bc I was like dammm am I gunna have to just do the whole friggen engine now…thank you for your response and keep up the good work

[@Chancesgarage]

This is the main reason why I still use forums for research

[@racedynamix]

😂 Yeah, the old information (if correct) is still accessible.. You may even find some of mine from the early days 😂

[@patrickv824]

When you say mapping, does that mean tuning?

[@racedynamix]

Yes 👍👍

[@patrickv824]

Thank you

[@FozzieSTIlife]

Myth 12...."Facebook is awesome".....Naa it aint! Its a cesspool. Great video, You actually covered something I have been speaking to someone about for the last few days and we couldnt get a definative answer so thank you!

[@racedynamix]

Glad it was useful to you James 😊

[@SmokedMexican]

I mainly clicked on the video to just give me the satisfaction of knowing dump valves dont need mapping/tuning when being installed. 90% of people still believe this for some reason.

[@racedynamix]

👌👍

[@zippack999]

wait you dont need a tune for a blowoff, why do Subaru act up when you do

[@racedynamix]

They will only act up if leaking or replacing one that has been mapped whilst it was leaking. If you understand what they do you will understand why no map change is possible or even needed. 👍

[@v8wrx]

Myth 11 Duncan had hair

[@racedynamix]

Pmsl 🤣🤣🤣😢

[@TheLineCrusherPVC]

The unreliable thing that a lot of Subarus have are unreliable owners. Check your oil, let your car warm up, don’t drive it like it’s stolen and maintain the basics. And foremost get a real tune/map put on it regardless of modifications the base maps/tunes suck.

[@racedynamix]

👌👏

[@blaqkhavok4863]

yeah.. no.. you lost it when u said =length does not mean more power vs UE.. you are just plane wrong

[@racedynamix]

Thanks for watching but in 16 yrs of tuning these full time I have yet to see evidence or a full and fair back to back test that shows it. If you have some please let me know and I will see whether I should revise that opinion 🙏

[@jordanclark831]

God I hate Facebook mechanics

[@racedynamix]

🤣👍