stu_555

so when i do come into some money and decide to fit a fmi what make and how much am i looking at spending also where can i get hold of them and are they an easy diy job to fit cheers again guys

joz8968

iTrader: (13)

The Hybrid GT Spec is considered the one to get: fit, finish, overall quality etc. PM/email harvey - he'll put you on the right track (he can supply and fit them, etc.)

Other ones are the Autobahn 88... and, I think, Hyperflow(?)

harvey

iTrader: (48)

The bar and plate is heavier because of the nature of its construction and therefore it can absorb more heat but as the tube and fin core on a Subaru front mount is larger than it needs to be (to act as a universal fitment for differing horsepower and turbo requirements), the difference in heat absorbtion ability is of no consequence in these circumstances. Therefore we are looking for an intercooler with the least pressure drop with adequate thermal properties and the Hybrid GT is an extremely cost effective solution.

joz8968

iTrader: (13)

But as far as a like-for-like TMIC is concerned, is a b&p one 'better' for heatsoak because it has more mass for the same volume, compared to a t&f?

Does this also mean that the b&p's inlet/outlet charge temp difference is greater (therefore more efficient) than the t&f?

85rob

im sure i read somewhere that the bonnet scoop isnt much cope over 100mph so upgrading the top mount the air flow still wont be as good as a front mount????

that about right?

eggy790

iTrader: (20)

i think your right ^ but normally when people go upgraded top mount, they change the scoop for an sti-7/8 one? supposedly better?

New_scooby_04

iTrader: (4)

IMHO Fundamentally, the TMIC is in the wrong place i.e. on top of a baking hot engine!

If you have a classic, the hybrid is a bit of a "no brainer". With a new age, an Sti 8 upgrade is easier and less hassle up to the low 400s.

Ns04

typeRv4

I have run a hyperflow tmic, waterspray and big scoop. I use digital temp gauges to log post intercooler intake temps. I'd recommend running such temp sensor to anyone who is interested in how cars / turbos actually work.

An interesting thing you can do on the motorway is turn on the IC watersprayer and watch the intake temps fall 3-4C below ambient temps.

Full throttle 3rd gear run you might see 10C increase in intake temps over ambient.

After a drive you can open the bonnet up and touch the TMIC and its cold to the touch. Heatsoak is not a problem from the engine.

Anyways

http://www.scoobyclinic.com/download/JTuner25B.pdf

seem to go ok with the tmic in the wrong spot

stu_555

so how much is the hybrid gt set up going to cost?

harvey

iTrader: (48)

Type R v 4 is exactly correct regards measuring the charge temperatures. Without doing this and relating them to a value over ambient I don't see how you can have an informed opinion as to what works best. However, I agree the location of the TMIC is not condusive to obtaining best results.
In my experience, when fitting an STi 8 TMIC to a Classic, to obtain acceptable results the STi 8 scoop is also required.
Running one of my own Classics with an STi 8 TMIC and another with a Hybrid FMIC I will not be fitting another STi 8 TMIC on grounds of the work involved, cost and performance.

This is becoming a bit pedantic. Like for like, ie. the same dimensions, as already explained, a bar and plate is heavier and therefore can absorb more heat but this applies whether it is removing heat from the air charge or absorbing under bonnet heat, especially when stood still in traffic.
This is only part of the story. Both tube and fin and bar and plate cores used as FMICs on Subarus are far bigger than required so because the size specification is not on the limit of the ability of the core to absorb heat for a given power, it is not really relevant.
A further consideration is the design of the core. A low pressure drop is desirable to reduce work load on the turbo and generally tube and fin cores have the least pressure drop. The actual design of each core is very important because two similar cores can have widely differing pressure drops.
The original Hybrid core was bar and plate with a much higher pressure drop than the current efficient tube and fin which has been used successfully at 700 bhp I am advised.

Stu555: I took delivery of a large consignment of GC8 and GDB intercooler kits last week and I am waiting for the customs invoice from DHL which should be here this week so I can set firm prices for the forseeable future. The current GC8 price on an interim order to maintain supplies was £350 each and the GDB £375. However, once I have the customs figure that price will reduce by a fair bit as this order was bought forward some time ago.