SAM-UK300

iTrader: (8)

Hi All,

As per title, I'm looking to run approx 350-375bhp, do I need a FMIC or a uprated TMIC or will standard be ok?

I've heard stories of FMIC doing more bad than good if not necessary?

Cheers
Sam

YoungY25

iTrader: (5)

You should be fine with an uprated TMIC mate. Mine hit 350bhp with an uprated one from the US. The turbo was the only thing holding it back

Shaun

A STI Newage TMIC will cope at this level just fine for road use.

Fudgey

iTrader: (1)

sorry to thread hijack, i also have a UK300 and will be looking for the same sort of power.
just trying to put together a shopping list of whats needed.

i already have but not fitted a decat uppipe

things to buy:
VF43 turbo (ported)
STI pink injectors?
RCM uprated fuel pump
decat down pipe and centre section
and a remap with carberry rom

now, if i get the carberry id want ALS and LC, but thought the VF turbos wont like it too much?
i wont be doing any rally stages etc, so wondering how long a VF43 will last?
also will be DV'less
cant afford a mar-m shaft turbo just yet lol

cheers and again, sorry!!

the shreksta

iTrader: (20)

I would say go for a td05-16g or 18g.......then can take some abuse from what ive heard.look on andy forrest website

SAM-UK300

iTrader: (8)

Yeah thats what I am going for... Still cant decide 16 or 18g though... anybody know the spool up difference? 16G would probably suffice for 350bhp however would be nice to have a little power left if I decide to squeeze a little more out in future...

YoungY25

iTrader: (5)

You'll deffo need the injectors and you'll need to add a stage 2 clutch to that list too

YoungY25

iTrader: (5)

Ive had a shot of one fitted with an 18g and I didnt think it was to bad, not great but not too laggy either. Hell of a pull once it spooled mind

Tidgy

at 350 you'll see improvments going front mount, personaly i would.

the shreksta

iTrader: (20)

I would go 18g on a sti top mount with some rcm headers and venturi up-pipe and stick a lightened flywheel on there to help the engine rev a bit more freely too

SAM-UK300

iTrader: (8)

Do I need the headers? I was advised they wern't necessary before? This was my planned spec, what do you think?

Already Done:
Full Decat Turbo Back Exhaust
RCM Up Pipe
Induction Kit
Uprated Fuel Pump (Cant remember spec)
Uprated Injectors (Cant remember spec)

Next To Do:
TD05-18G
Japspeed TMIC (Same price as STI one)
Remap @ Slowboy racing
Oil Cooler System

Tidgy

i'd sack the 18g in favour of an sc36 or 38 myself

SAM-UK300

iTrader: (8)

Oh? Whats the difference? I.E Benefits?

Tidgy

its an 18g on steriods basicly

billet wheels, etc etc, better spool, better top end power, your unlikly to find oue second hand is the only downside

the shreksta

iTrader: (20)

decent headers and up.pipe will aid spool, I think its one of the reasons my vf35 made 354bhp even a set of ported standard headers will be good enough from as performance

richyprodrive1988

I made 400bhp on standard sti top mount, md321 turbo, hawk sti blue injectors, panel filter and ported the standard headers myself. So 370 is easily achievable on a top mount. Car is 2005 sti

Tidgy

achievable yes, ideal? no

its not just about peak power when it comes to switching

SAM-UK300

iTrader: (8)

So will a FMIC Aid torque/spool up etc?

Tidgy

you'll prob find you get a bit more peak, however its more what you wont loose on a hot day and in traffic.

the back to back test that have been done by harvey, jap peformance mag agree'd with that. o i run a hawk at just under 400 and the top mount was struggling on a warm day when it was mapped

richyprodrive1988

Spool up is usually slower with a fmic from what iv read but never had one so could just be hearsay

Shaun

It's all about the pressure build-up and retention..... if you buy a decent FMIC set-up you shouldn't have any issues in this area, although side by side, throttle response will logically be sharper on a TMIC.

Shaun

For a road car at this level..... that is highly subjective to say the least.

Fudgey

iTrader: (1)

I must admit that i am not a fan of FMIC's on the impreza as the pipework everywhere looks ****e!

so ill be sticking to the STI topmount. all imo of course!

and they have been well proven to cope fine at that power level

Shaun

Fudgey,
Can't say I blame you.

I ran my old SPEC C (in 2ltr guise) @ 370+bhp. Over 60 laps (Snetterton) at Tuner GP in the peak of Summer temps..... came 4th in class. Next quickest was a 500bhp Tuner EVO.

TMIC didn't cause me any adverse effects all day.... and I smashed the granny out of it.

SAM-UK300

iTrader: (8)

OK... So I'm still a bit confused... If I'm looking for just 350BHP a FMIC will still be better? or will an upgrade TMIC be better?

Tidgy

why is it, on the road you will suffer more from heat soak etc than you would on track, so its only going to improve things more.

come on shaun you know how much testing harvey did.

Tidgy

front mount mate, testing proves it.

all other comments are based on opinion, not on actual testing

Shaun

You really need to put this in to context of the real world and stop concentrating on x & y = z.

If I were to own another STI again @ up to 400bhp (without a second thought at the figures quoted in this thread), I would not consider a FMIC for road use. It's simply not worth the money imo.

You quote Harvey and I'll quote Andy Forrest (running far in excess of 450bhp on the STI TMIC). There are always two sides.

I'll take middle ground on this occasion.

I've experienced the use of a STI TMIC at a fairly "abusive" level and it coped admirably & cost me nothing.

A whole tuning industry relies upon people spending their cash..... quite often on items that do not provide a valid return on investment. I'm not going to stand in the way of people who wish to do that.

Fudgey

iTrader: (1)

that is true, all in peoples opinions. and everyone is different lol

another question, with having 3.27 miles of pipework for an FMIC, does that not increase lag at all?

i guess when the time comes for myself personally i will look into it a bit more in depth, but from what i can gather 400bhp is the limits of the STI top mount, i know i wont be looking for any more than that so its a case of what is fit for purpose/cost.

im trying to argue here either, but for what myself and the OP are aiming to acheive then the top mount will suffice.

also fitting the FMIC causes other problems like pipes fouling on the header etc

chet123

iTrader: (7)

Second that.

For the power you are wanting to achieve you would be wasted with a fmic.