well.. the function of an induction kit is to get as much clean cool air as it can into the engine.

but, it needs a clean source. and to be large enough for the vehicle.

tbh you wont get much if any perf gains from it

none that will be noticable.

but you will get a nice sound and the pleasure of knowing it there.. plus it will look good

if you have a full system then there will be a much bet6ter chance of it making a difference, but even then it wont be too noticable

but im still gettin induction. ive heard that BMC are the best for a fiat (i think jug told me that)

the only way to get a real gain is to have forced induction. by that i mean you need to have the induction kit enclosed in a surround, and there needs to be an air intake pipe that is positioned in such a way that when the car is moving at speed air will be forced into the intake pipe, increasing air pressure, which in turn makes induction easier, which increases the efficiency of the engine, giving more power. in addition to increased air pressure, this type of setup will isolate the air going into the engine from the hot air in the engine bay, further increasing the gains.

if you stick a conventional K&N style induction kit on your car in place of the airbox, you will possibly suffer a performance loss due to the hot air taken in from the engine bay. although this is not going to be noticable, and you will get a better induction roar noise. this is what i have on my car and i cant tell the difference performance wise.

your theory is correct, and it is what i've done (kept original air intake to supply induction kit with cold air), but the problem in practice is that the stock parts used to direct cold air to the airbox (or induciton kit if you fit one) do not do the job very well. with the air box in place the only place air can be taken in is from behind the grill on the bonnet, since this is where the stock intake is. however once the airbox is replaced by an induction kit the chance of any air getting blasted down the stock pipe is very small because the stock intake holes are very small, and not positioned well enough to hit any real amount of incoming air (stuck behind the 2 tiny holes in the grill is not a great place to be if you want to catch as much air as possible). this means the actual amount of air getting to the filter through the stock pipe will be very small. to prove this i stuck some ribbon in the pipe, and then drove 100mph for at least 2 miles. when i pulled over the ribbon hadn't even been blown out of the pipe. if a sufficient amount of airflow was occuring the ribbon would have been blasted out.

so whats a better option? well tbh who cares, it makes bugger all difference anyway. but if i had an enclosed induction kit (such as when i stuck a peanut jar over mine) then i would be more interested in the possiblity of increasing air pressure. i tried to fit a standard 70mm cold air feed pipe in a position that would allow maximum airflow to the filter. to do this i positioned the opening in the front bumper where plenty of air would hit it directly, and i also tried to minimise the number of bends in the pipe, and how sharp the bends were. i then tried my ribbon test on this pipe and found it was blown out of the pipe every time, proving that a lot more air was going thorough this pipe. but even if i connected this pipe to the peanut jar (increasing air pressure in theory) i couldnt tell the differnece performance wise. i then took the pipe off (& peanut jar) and went back to the stock setup, because tbh it sounds better, and looks better.

just remember the lower your insuction pipe (initally where the air enters it) the more likely the car is to suck up the dirt and water when it rains


happened to a local bloke with a Cossy :S

question for jug:
jug you have been replying to my thread on inductiion kit swap and there was the problem with the compatibility of the plastic scoop intake behind the grill over the radiator, from looking in the haynes manual the same part on the 1.6 looks compatible to that of mine (1.2 80 sx 16v) so would i be right in thinking it would work on mine?

also what is the bit that sticks out on the back of the circled part? it looks like the only difference?

the bit that sticks out looks like the radiator filler cap. i think on models without an expansion tank there is a filler cap placed there.

according to this pic the 1.6 does have the same hole for the filler cap.

jug said:

the bit that sticks out looks like the radiator filler cap. i think on models without an expansion tank there is a filler cap placed there.

according to this pic the 1.6 does have the same hole for the filler cap.

Click to expand...

Jug I dont think he means that bit. Think he means the lump of plastic with 3 lines on it, behind the filler cap on the other side of the scoop

oh that bit! no idea, but if its plastic it usually means you dont need it.

lol your spot on with that one jug I think it may be an induction muffler. As mine is on the bottom in a similar place to where the 1.2s filler cap is and as mine doesnt have a recess for a filler cap theyve put it on the bottom. And span it to the back of the 1.2s becasue the filler cap is in the way

Had a look at my 80sx and my HGT today, the airboxes look totally different. I'll post pics in the morning, but dont know if they'd be cross compatable.