22 replies to this topic

[macca]

Stats on my motor 2005 WRX 2.0 Litre with STi injectors, inlet pipes, TMIC and high mount scoop. Tuned, stainless exhaust and STi VF-34 Turbo fitted. Dyno tuned @ 195kwaw on 18psi with 525nm of torque on 98 octane.

 

Now considering fitting a FMIC, however I have heard that TMIC's are more efficient with a lot less turbo lag in low gears than FMIC's. However the FMIC's deliver superior cooling / Horsepower in the higher gears. 

 

True / False / bit of both?

 

Also, would I receive any performance gains by upgrading the inlet manifold to a red STi manifold?

 

macca

[Niko]

FMIC vs TMIC http://www.subyclub....r-tmic/?hl=fmic

 

Bigger TMIC = gains http://www.subyclub....e-2#entry537307

 

FMIC is a watershed modification. Not 100% necessary in your current set up, but given your plans for your car, it might be an inevitable occurrence. Talk to your mechanic/tuner for an educated (hopefully) opinion, and Aek, as he is running a FMIC on the Lib and a TMIC on the Foz.

[Reevesy]

Yes you will have a bit more lag with a FMIC, but it would only be a couple of hundred RPM more, which in reality is something you would probably never notice.

 

And a red STi manifold is exactly the same as as your current one, the only difference is it is painted red

[macca]

I am replacing the bonnet with a full carbon fibre bonnet.

 bonnet.jpg   26.29KB   8 downloads

Does TMIC require a bonnet scoop to be 100% or will it still perform without the scoop.

 

[macca]

Thank you Niko for the link FMIC vs TMIC http://www.subyclub....r-tmic/?hl=fmic

Reevesy - I believed that the STi had a bigger throttle body and improved internal air flow?

[Josh.]

You don't even feel the tiny bit of extra lag.
The power delivery is a lot smoother and it seems to pull a little harder in the higher revs.
It probably isn't necessary but if you are willing to spend the money it is definitely better than a top mount.

[macca]

You don't even feel the tiny bit of extra lag.
The power delivery is a lot smoother and it seems to pull a little harder in the higher revs.
It probably isn't necessary but if you are willing to spend the money it is definitely better than a top mount.

I really appreciate people who comment on what they have experienced. Thanx Josh

[Beckers]

The front mount will not suffer from heat soak like a top mount does.

[allpaw4]

Yes, you will need a scoop to force air through a top mount IC, otherwise it will just skim over the top. That's why there is a rubber seal around the underside of the bonnet scoop. Air will always take the path of least resistance, and a cooler is a fair bit of resistance.

[aekOne]

if your going to use that carbon hood with reverse scoop you will need to run a front mount. the reverse scoop is designed to be used with a front mount set up and draws air OUT of the engine bay, not into it. the front lip on the scoop generates a low pressure that creates a vacuum to suck air out

[macca]

Thanx Aek

[JRod]

Carbon fibre bonnets are illegal on the road too. Prepare for an arse raping.

[macca]

Carbon fibre bonnets are illegal on the road too. Prepare for an arse raping.

Can you provide the statute from the road rules from the NSW Roads and Traffic Authority, which the Police implement as Law, WHICH rule states that legally sold after market bonnets are illegal to fit?????? 

[aekOne]

that it was "legally" sold isn't part of the issue, its is it an ADR approved part or modification. Many after parts are "legally sold" yet lots are "illegal" once fitted to a road registered car. your standard bonnet has been designed to crumple a certain way as well as stay in one piece in an accident where as a carbon fibre hood can shatter into pieces. The RMS would consider it to be dangerous it could change the structural integrity of your car in an accident or a be danger to others who may be involved if you hit a pedestrian or other car. 

 

the full guidelines are available on the RMS website BUT i'm not sure they're entirely clear as they can be pretty vague in their wordings sometimes. As far as i'm aware they can be certified by an engineer but in the end of the day they can still defect you for it.

[Niko]

Black N/A bonnet would be just as good.

[macca]

Acknowledged that any modification to the originally engineered design of the vehicle, would be considered illegal. Unless same vehicle was certified as road worthy by an expert.

Without said certificate, fitting ANY after market part is a risk of a defect.

[Barbbachello]

Yes but i doubt youd be able to get a CF bonnet past a roadworthy cos it violates the ADRs

[aekOne]

but some things more so than other Macca.

i honestly doubt that any carbon fibre panel made by Carmate would pass ADR/RMS testing anyway so are only good for track cars etc unless your not worried about the legality of using one.

 

edit 2

Below is a cut and paste from the Carmate site regarding the legality of their parts on road registered cars:

"How do I know what products are illegal for road use?
All products on this site are intended for race use only, and it is the owner's responsibility to be aware of the legalities of fitting these products in his or her state/territory regarding noise, emissions and vehicle modifications."

[Barbbachello]

In other words; theyre not 

[aekOne]

haha yeah pretty much

 

if your worried about it being legal it'd probably be easier getting a reverse scoop modded into an N/A bonnet.