Hey,

had my 03 STi Dyno'd today at Scoobyclinic,the output is what I thought so,pretty happy,happy there are no problems either.

the car is a UK car,has the following...

-prodrive fuel pump
-prodrive 3-port boost solenoid
-silicone intake hose
-group N panel filter
-full de-cat to prodrive back box
-Race Dynamix re map


here's some pic's, but the real reason i'm posting is...if I was to add a RCM intake kit and harveys headers,or maybe gt spec headers with a matching up pipe for either....would I see any noticeable improvements?

Thanks guy's!

 

how much torque you getting?

 

Hey mate. I see the dyno run was done in third gear. The only time i had my car on a dyno in this country it was run in forth. Can they be done in any gear?

 

mine was run in fourth gear...

 

Nice result Ben

yeah you would see a small improvement with headers and induction but how much is pretty hard to say. Sorry I missed your call earlier - was having a bbq and enjoying some sun

Looks like 295 ish lb/ft - not bad

 

my00 made 340.3 with 295 ib/ft

 

Hey guy's,

yeah I thought they always dyno'd in 5th but...who knows...

torque is around 285/290,as we said duncan...330/340 so we were on the money...I'm happy....as always tho,just got thoughts running around my head on what's next!

give me a call Duncan if you get a moment tomorrow please,

Thanks,

 

i would be happy aswel mate as its a nice car

 

cool - am at cadwell tomorrow watching the superbikes - will give you a shout during the day sometime

 

looks a bit lean

 

anybody else any thoughts on the AFR?

 

Your car will be making more power than that on the road, it might boost a bit higher if it was run in 4th gear too.

I would go straight to tubular headers with Harvey's GT spec up-pipe, they will help boost your torque and will give you head room if you ever upgrade your turbo.

Anders

 

wow...you've got me excited...thinking about it...I know my car boost's around 21 PSI but the dyno only shows 18?

I was told to stay away from tubular headers unless going beyond 400BHP?

any thoughts on it being lean?

also...is there much point throwing mroe stuff at the car if sticking with the stock turbo (temporarily) as I thought the VF34 maxed at 340 ish?

thanks for your input

 

Motion-MX, i think you and i need a MD321.

 

AFR's on dyno's are not always the best guide Ben as the environment is a little artificial. happy to check it out for you when i am up next but as you said it is happy and that is ultimately the main point.

headers - i have seen some good improvements in the mid 300's from fittings harvey's headers and uppipe.

And yes to the MD321

 

usually show richer than they are on the road when on the dyno..

Worth checking imho.

Simon

 

I was at a similar state of tune a couple of years ago with Harvey's ported headers, up-pipe and FMIC with cold air induction it made 332bhp on Powerstations rollers (some people say they show less than Dyno Dynamics).

In all honesty you probably won't see much more peak power from the VF34, it only flows so much. Adding ported headers will help spool and give you some better torque over the rev range, but if you want a big hike in power you'll need to accept big spend with MD321H or one of the new Scooby Clinic turbos, tubular headers and probably a 3" exhaust.

If you can be happy with 370-380bhp you might get away with the standard injectors and TMIC.

Anders

 

My bugeye STi (not PPP) was running 360 bhp when tuned at G-Force Motorsport back in 2004. Specs were tubular headers, FMIC (inc induction kit), APS 3" exhaust with sports cat uprated fuel pump. But was running a GEMS ecu as at ther decision time Ecutek was early in development and all the info avaliable said past 400 bhp would need standalone ECU. Currently at 416 bhp at almost 100k miles, with no internal work EVER. Bought car brand new so know every job done.

 

What turbo you running now fella? Was that 360 on the standard turbo?

 

definitely mate,you fancy lending me 1K? haha


alrighty...definitely gona grab some headers...tubular,harveys or gt spec I don't know but... headers up pipe and an RCM induction kit and map tweak pretty soon.

thanks people,

 

Don't bother with the RCM induction kit unless you're fitting an FMIC, it will suck hot air from the engine bay and your TMIC will struggle.

Anders

 

nice fp green maybe going here made 399/390@20psi and duncan will confirm how it goes lol

 

what intake kit should I look at then?

thanks,

 

VF48s can be picked up cheap.. could be a cheap stop gap before you can afford a 321T ?

 

 

If you are sticking with the same turbo or even going as far as a TD05 18G my advice is not to spend any money on induction as the air box on your STi 03 does a good job way beyond 360 bhp. If you are going to 400 bhp because of a turbo change (and injectors) then go for an RCMS induction kit which I can also do for you.
If you are sticking with your existing turbo then you are looking for more torque and ported headers and matched uppipe is the way to go. However, if you have designs on a bigger turbo and plan to go towards the 400 bracket then tubular headers with special uppipe are the way to go.
However, I would not advocate fitting the tubular headers at the 400 bracket without the special uppipe. What is quite clear is that your torque is relatively low and changing to ported headers will definately improve that situation and give good potential for more.

 

Sorry, you've lost me there. Do you mean that it won't suck hot air from the engine bay if you fit an FMIC? or do you mean that the TMIC will struggle with the RCM filter sucking all the hot air out?

 

you have little choice when you fit a fmic as it is difficult to retain the standard air box with fmic pipes having to pass it.

Simon

 

I mean if he's sticking with TMIC, the benefit in flow are wiped out by the increased temperature from the engine bay, especially if he retains the standard MAF set up.

If he wants 400bhp with TMIC, probably better to fit an APS CAIK in the wing, or some other wing mounted filter?

btw, I'm interested in your engine bay mounted induction kit with long skinnty K&N filter and hard pipe. How much for that set up? (I've got FMIC).

Anders

 

But the AFRs would be accounted for in the remap, regardless of what's used for induction.

Just means that he could be missing out on, maybe, 5-10bhp extra max. for the peak power figure, compared to if he had a fully enclosed airbox and air feed around the cone filter (or isolated away in the wing, as you say), and hence denser air so more fuel to burn/power to make.