Hi

I am very recent to this website and it sounds very interesting and excuse me if i mention any illogical debate as i am familiar to sti too and my knowledge is poor.

I hope we can exchange experience guys.

I live in the middle east (gulf area) where in summer the temperature rises to 130-140 F in July and August (yes I know it is hell.

I am running my car (susu the beast) as a DD.

Well, let me introduce her. She is 2004 STI 2.0 L Spec-C. She is very stock despite minor modifications. Good description of her could be as follows:

-VF 37 twin scroll turbo charger
-Full hks hi-power exhaust system (silent)
-Catless down pipe
-Bosche 275 fuel pump accompanied with a fuel compressor (set at 3.10)
-K&N air intake (full system with induction and suction)
-Blitz dumb valve (adjustable)
-brimbo breaks, suspensions and etc.
-Stock 2004 sti IC accompanied with an I/C Spray (could be set on auto)
-6 gears electric (DCFD)
-Tuned with average boost of 1.4 bar (almost 22 psi) and timing of 24-26 (as far i believe)
-Average of 305 whp
-0-60 miles in 4.5 seconds average in night or cold weather.

I got my swap and these modifications in Jordan as this car is not well familiar in Saudi Arabia. I do not believe in our people here as all what they care for is money and that's it and that's why i need ur suggestion from actual experience or rich knowledge.

Keeping my turbo the same (VF 37) and without installing manual boost controller (as I heard such a thing could harm the engine if set at wrong high boost level), would adding a bigger TMIC increase my hp??

What accompanied mods i gota do?

If such a modification wont help and is money for nothing, what else i can do than above? (total budget i got is around $ 1,500)

I still wanna run my car daily and i do not wana harm my block or keep visiting garages as sending her to jordan for maintenance and repairs means 1000 miles from here and i've been driving Susu since Jan 2011 with this swap and m grateful she's just fine!!!

I hope i can reach 360 to 400 hp with these restrictions as i have seen some cars in jordan with manual boost controller only were able to hit 450 hp

Appreciating your help.

EK

 

A bigger intercooler won't really help you reach your goal alone.

To safely reach that high horsepower level, you will want to reconsider your budget and go with a bigger turbo and accompanying mods. I think it would be the best for you to go that route. A stock VF series turbo will not make that kind of power. If I were you, I would just leave it as-is and enjoy what you already have. But if you want to continue daily driving it and really are striving for more power, you will want to buy quality components and do your research before you blow something up.

 

Thanks bobb, thats my thought as well although am afraid that bigger turbo may require extra mods than i have (smth for the piston inside or strocker kit etc.)I have read that vf 37 + with stock tmic can hit the 375 doesn't it? How could it if so?!

I have been reading 100 threads here and diff webs about PW TMIC or some FMIC.. do they give noticeable increase in power alone? like 10-15 more HP?

How about increasing injectors size (550 cc to 750 or 850)

I dono are my thoughts B.S. or sense-able.

Thanks again

 

Hi there, so there are a lot of things to think about. One thing you have not mentioned it the type of fuel you’re planning on using. For a dd, i have to go off a crappy 91 oct. But with higher oct. you can get much more power on the same setup. Keep that in mind when you are reading other power ranges other people say they got too. I just changed out my aftermarket TMIC for a FMIC. I was concerned because of heat soak.
The size of your injectors is determined by how much power you want as well, and it will depend on how you tune your ride.. Save up a bit more, and do some research from a good tuner. Don’t forget about the fuel pump as well.

 

E85 if you can get it. Those 2.0 motors with the vf-37 love ethanol

 

Well the Best thng in this country is. Their pure clean gas. M using 95 octan since ever and still not reaching these high levels hp of 375+ (95 octan here costs me abt $9 for 50 litres )
About my fuel pump its Bosche 275.
Another info that might b useful that my headers are equal length.
Mayb tuning is improper. I believe with good tuning, changing my stock tmic (I prefer going to larger tmic mayb 08 sti one or PW) and enlarging my injectors (I dono what size I should fix to reach 375-400 hp or Approximate cost for changing injectors) I should b fine.
What do u think of installing a manual boost controller? (Engine safety wise) Correct me if m wrong with these considerations plz and thx for the feedback

 

buy this turbo: Kinugawa TD05H - 18G SUBARU Twin Scroll Turbocharger

increase your injector size, retune and youll have some decent power

 

I am considering the injectors thing. But still wana stick with my vf 37 I know dudes hiTting 400 hp with vf 34 tho but using boost controllers (which I dono is healthy or not). Wana c hw much max hp can be generated from vf 37 by only fuel/air management and tuning but I dono how (its also safer for the engine block right?)

 

Your engine is REALLY strong...it can handle the power. I'd personally go with a 30r turbo supporting mods and some good fuel and you'll be fast. Goodluck.

 

That's a lot of power for an EJ207 to handle.

 

I believe his motor comes with forged internals. A member on here has a JDM STI 2.0 liter (non spec C) putting down 410 whp on e85...

 

So do EJ257s. You can put down that much on a 257 easily, but it's not safe if you regularly use that power.

 

yep he does lolvtec and its fine one of the 2.0 sti blocks

 

It's a built motor from stock.

Your car should have equal lengths due to the stock twinscroll set up. Equal lengths move the power band right anyways. You probably won't hit those numbers with what you have. Those are either high reading dynos or/and are tuned on E85 or probably higher rated octanes.

Get a different intercooler, some 850-1000cc injectors, and a bigger turbo you'll hit what you want.

 

Nothing is safe. Gotta pay to play.