Im planning to do a power upgrade on my 09 wrx. And I need some suggestions from you guys.
My Current engine mods are:
K&N Typhoon Air Intake kit
Cobb decat downpipe
Invidia twin mufflers exhaust
Zage Unequal length headers kit
GFB Bov
Unichip Q plus
95 octane tune
*Car was making abt 300bhp on dastek dyno without unequal headers. N hvnt got the chance to tune n dyno since headers was installed.*
Transmission: Full Standard.
I'm planning to install:
Kamak TD06SL-20G (already purchased)
FMIC custom
I have read the forums about needing to upgrade the injectors and fuel pump as well.
I'm not looking for a crazy high boost high WHP...I'm more into reliability, day to day drive to office and occasional weekend cruise with STIs and Evos :crying: (not into drag racing)
My questions are
- do i really need 750-850cc injectors? or 650cc are enough?
- does injector size affect fuel consumption? (With the same tune, of course to the level of 650cc)
- whats the recommended Whp & torque & boost level i should be looking for, if i want to keep the engine relatively reliable (stock internals), and stock transmission (standard clutch n standard gears)
- can the unichip Q plus able to keep all these mods in harmony? Cos, I like the option of having 5 maps that i can choose from, rather than a single tune from an ECU remap.
- anybody has any experiance on Kamak/kinugawa turbos? Need your reviews on this. (Reliability, how many rpm it starts to spool, laggy?)
Any advice and comments are very highly appreciated. Btw, I live in Indonesia, and the weather is hot with lots of bad traffic jams. Max fuel octAne we have is only 95...I think pretty soon, the government will eliminate 95 and replace it with 98.*fingers cross*
-650cc is not enough for a 20g. but i would even go 1000cc so you can use E85 fuel (if available in indonesia)
-yes. and will actually cause alot of problems if you just change to bigger injectors and dont re-tune. when your injector latency is at 50% spraying fuel on a 650cc, it will be spraying 325cc of fuel, but at 50% 850cc's will be spraying 425cc of fuel at the same revs and engine loads making your car incredibly rich.
-dont chase power. chase a safe engine with what you have and good power will come as a by-product.
-i never used a unichipQ so no idea there. but changing to a bigger turbo and injectors will require a complete re-tune anyways on all your maps.
-kinugawa use Garrett CHRA's. meaning kinugawa buy garret innards, make their own housing castings, an sell them as their own. most companies do this. very few companies actually make rotating assemblies.
-are you 100% certain it is 98OCT and not 98RON??
- we dont have E85 here in Indonesia. Our best fuel is currently at 95 Octane for Shell Vpower (can be seen at shell indonesia website). Sucks doesnt it....the government is planning to eliminate 95 octane and replace it with 98 oct, so fingers crosssssss
- im chasing a good reliable power upgrade thats reliable enough for day to day
- definitely need to retune all after the new performance parts went it
- thanks for the injector explanation, i can see where u r getting at. I will be getting 850cc to be on a safer side, with a bit more room to play with.
95OCT is fine. we only have 94 in canada. but of course 98 is better.
those mods will make a great daily driver with a really good power band. but i meant dont chase a specific number. some people may tell you "oh that set up will get you XXX hp" but due to a difference in multiple variables you cant for sure yield the same result. something as simple as a different dyno and elevation could show a difference of almost 50WHP and if your trying to get to that XXX mark, you might blow your engine because you're trying to reach a specific number that someone told you that you could reach. let your engine tell you how much power it wants to make and your internals will hold up to it.
titter is spot on again, 20G will need bigger injectors and a new tune. I dont see them on your list so make sure you have a fuel pump to support those bigger injectors. You said no Ethanol so you dont need to spend the extra money on a flex fuel pump but a upgraded fuel pump would help you feed those new injectors.
Depending on your octane rating ( and local air temps ) you can also supplement by adding a methanol injection kit. It sprays a fine mist of methanol/water blend into the intake path right after the MAF. The water hits hot parts and evaporates into the airstream allowing the inter cooler to be more effective. The methanol raises the effective octane rating of the fuel by cooling the air charge and by raising the flash point of the air/fuel charge. In the US we use them in the hotter states to give us the wiggle room to tune with more aggressive timing similar to running race fuels. Some of the more advanced models even come with warning systems and cutoffs and live tune moding for when you run low on meth mix. Most kits need refilling about once a month depending on their settings and the size of your tank.
I know this thread is about power but you really should consider a performance braking setup, on the 09 the firewall flex alone is enough to rob you of a few feet of stopping distance. A master cylinder brace and stainless lines are affordable and make a huge difference on the 08-14 models.
@titter: Thanks for the advice, after reading ## comment, i purchased a set of 850cc bosch injectors. And Would soon get walbro 255.
@arcticsythe: indonesia is hot all year round with temp ranging from 28deg-39deg celcius. Does WMI actually increases power?
Or it just cools things up to make room for more aggresive tune?
Meth injection allows you to make more power by removing the knock and predet that restricts your timing and tuning. There is a side effect of meth injection that cools your air charge which works like an upgraded inter-cooler so there may be some additional power from a cooler air charge but the gains would be similar to when its cooler out.
If you are dealing with those kinds of temps I would also look into thermal wraps for your headers, up-pipe turbo and down-pipe. Keeping the heat away from your intercooler will make more power and it will solve alot of the knock issues we see from heat soak.
water/alch/meth injection also steam cleans the inside of your engine. valves, pistons, etc literally have zero carbon and deposits on them if you ever tear your motor apart.
91OCT + water/meth = 108(ish)OCT. not sure what you would be at with 98 + WMI... maybe 112ish? the math works out weird.
if youre able to fuel 98OCT then you wont really see as much of a benefit as someone would in a place that only gets 91OCT (like california). though with your hot temperatures it is probably a good idea to have to help keep the intake charge cool.
as stated it does not add power directly but yes allows for a more aggressive tune by giving you incredible amount of knock threshold.
When Xklusiv says 95/98, he's talking RON. Which is what we would call 91/93 in the US, respectively. He has california dishwater only and is hoping for typical 93 premium.
Xklusiv, you need to find a tuner. Talk to them about your parts and your goals. You can't change this stuff without a complete re-tune which you can't do yourself.
Octane ratings will forever be confusing, but Canada's best fuel is better than Japan's standard 98 Premium.
"Premium" gasoline in Japan (Japanese Industrial Standards), "IP Plus 100" in Italy, "Tamoil WR 100" in Italy, "Shell V-Power Racing" in Australia - discontinued July 2008 [17] is 100 RON
Petro-Canada "Ultra 94" in Canada [19] is 101.5 RON
yea the JDM super-fuel was debunked long ago. thats why OCT/RON is usualy my first question. our 94 is pretty damn good for what it is, but i wish we would get more E85 pumps.
Hi guys, sorry for late reply, been a hectic week.
Fuel: i dont really know about USA/canada/europe fuel Ron/Oct calculations, because in asia n australia, its usually called octane haha..i will leave this to your better knowledge. @mosc : yes, we have some good tuners here, and for sure, once all these mods are installed, i will need to get it tuned to perfection (most reliable) @titter: i will seriously consider a WMI setup @GSMNZ: most probably i will find local dealer who sells WMi kit, because, if i buy from overseas, the import tax and shipping cost can kill me hahaha
@articsycthe: understood
My question is, based on my intended equipment , fuel and weather, what power figure can i expect from them?
Do you guys think about 330-350whp would be reliable? Im not looking for huge power, just want it to be reliable and not spend too much...
again, that is not a question we can answer reliably.
we could say "350" but maybe your only going 310-320 during the tuning session so you think "well lets push it a bit more since i know theres 30 more hp in there" but really there isnt and u go to push your engine and blow it up.
if you were already at 300 and youre adding a 20g, injectors, and a FMIC, a safe *GUESS* be the 340-350 range but dont try to push for those numbers.
push for a safe engine and the power will follow. everything isnt about numbers. i know of suby's with 100 more HP than mine putting down full second slower 1/4 mile times.
Okkk, i will see how it goes, and keep u guys updated on the build
Cheersss
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