IS IT WORTH IT????

[TWH]

Nice one! So yeah, the lag is only going to be dependent on how well the FMIC is designed, but in theory should be less as the turbo doesn't have to spin up to such high pressures.

[simple1]

[quote="TWH"]Now forgive me for asking an innocent question, but why should a bigger intercooler mean it takes longer to get the air into the cylinder? There's never going to be a vacuum in the air intake so air will always be available as instantly as with a smaller intercooler no?

quote]
Ah but here lies the problem, because there is a vacuum, the intake system still feeds through the intercoolers even when not on boost, so a bigger bag is going to take longer to fill with the same amount of puff being pushed in....... talk to any tuning company and they will explain it better I am sure, you also have to remember that the DV's dump boost which needs to be replaced too God I hate not being able to express myself well in writing............frig it........tall stool time

[TWH]

I see what you're saying. It's an interesting one (if you're an engineer) and one I'll have to look at in more detail should I decide to go down that route. Luckilly at the moment I can remain ignorant!!

[BOWS3]

Why should it take longer to fill ? Forgive my ignorance , but are you replacing the factory i/cs with a single fmic or using it in addition to ? Shouldn't a single i/c capacity be matched to the capacity of the two factory i/cs ( or thereabouts ) ?

Chris.

[simple1]

It is a fair question, and it was my understanding that the standard ones are removed and replaced by the front mounted model, which has a greater capacity than the two standard i/c's

[stevesmee]

i have owned my car for 2.5 years now and therefore know exactly how it feels through all the up grades i have had done. FMIC was fitted 3 months ago, there is noooo extra lag and in fact the boost seems to come in approx 100 rpm earlier and the car seems so much more alive through the entire rev range.

FMIC forever!

stevesmee

[simple1]

FMIC was fitted 3 months ago, there is noooo extra lag and in fact the boost seems to come in approx 100 rpm earlier and the car seems so much more alive through the entire rev range.

FMIC forever!

stevesmee

Question for you, have you done anything with the turbos through your upgrades or are they still bog standard. My experience comes from changing the i/c on my group B rally car, with the bigger i/c it developed a slightly longer lag, this was overcome with slightly larger compressor housing, final evo was 993 turbo with modified turbine wheel?

[stevesmee]

when i had fmic fitted i was running standard turbo's, i am now running balanced turbo's which are producing 517 bhp.

stevesmee

[fade2grey]

wrt the FMIC - I think it's more that the longer intake tract will give a less sharp throttle response. I'm not convinced that under normal conditions there will be a big difference in turbo lag - but if anyone wants to explain I'm listening.

A

[TarmacTerrorist]

Here's a crazy one for you all then...

Why not disconnect the footwell vents from the aircon system and re-direct the flow down through pipes onto the ic's. When needed all you do is flick the floor vent button on the centre consol unit and set 'Lo' temp and a high fan speed. Hey presto, Bob's yer uncle!

[dodgydave]

Dave's simple power 1x1 .... Bigger Intercooler = Cooler air = More oxygen & Fuel = MORE POWER !!!!!!!!!