front pipe. UAS Vs RPW??

[mcgal]

Hey just picked up my fto yesterday!is awesome. looking at putting on a few mods straight away.
Looking at buying a front pipe first for the exhaust. does anyone have any recomendations.. ive been told about UAS AND RPW but am not too sure at the moment which is best or are there any other brands someone can suggest...

secondly im interested in putting an intake system in straight away as i noticed it's the standard box is restricting and acoustically doesn't do the car justice.... i want one the that goes all the way down to the front of the car so it gets max air... was looking at a new rpw one for $225 any suggestions???
Finnaly i noticed it's quiet rare to have a metal intake on FTO'S why is that. i got a few mates with vtir/wrx/skyline etc.. and they are all using the metal ones that sound awesome? is there any differences.
i know im asking a lot a questions but i just don't wanna buy sh*t parts for my car and i know you guys know your sh*t about FTO'S

much apprecitated Matt!!!

[dstocks]

ARC do a metal one, but it doesnt have a CAI kit. Im currently building my own to fit.

[SG]

i want one the that goes all the way down to the front of the car so it gets max air... was looking at a new rpw one for $225 any suggestions???

buy it!

Finnaly i noticed it's quiet rare to have a metal intake on FTO'S why is that. i got a few mates with vtir/wrx/skyline etc

i think you get a louder induction noise with metal because its thinner...and it also looks better.. but not sure on the heat resitance though. ftos owners have to squeeze every last kw out cos we dont have turbos

[spetz]

I would go for RPW extractors as they are about the same price I think but they are a complete extractor kit rather than just downpipes

[Nacho]

What are we talking about here exactly? Are we talking about the extractors? or the 2.5inch downpipe that UAS designed some time ago?

[EURO]

i think they are talking about both....


from my understanding... RPW includes downpipes and extractors

UAS is just downpipes?

correct?

[Bennoz]

Unique Auto Sports downpipe



RPW Extractors & downpipe



Not inter-compatible

UAS pipes fit on stock headers, RPWs you have to replace the lot

[AJ]

I've got both UAS down pipe and CAI (rubber pipe). Both work well together. They'll give you the noise you are after alright. The CAI includes a pipe that feeds cold air from your front bar. You will notice a difference in performance too.

[khunjeng]

I have the UAS CAI kits and a feed from my front bar..works well got ~5kwatw so there u go....I'm getting the R33 kit from them too...I love the unifilter works a treat.

[Nacho]

How much for the RPW extractor and downpipe combo? Anyone know?

[EURO]

you cant combo them.......

the RPW includes extractor and downpipe....

[Aspenmai]

check out the group buy
I think the price has come down a bit
but i reckon its worth it
depends on what you want
I'm for the rpw ones... upgrade front to back

not sure if i'm getting this right - difference in design the two pipes on the rpw ones that lead to the manifolds are the same length to stabilise flow out (sorry don't know the technical terms =P)

[SG]

i think apparently longer extractor pipes before they get to the collector means a bit more torque.. The UAS ones look longer but they're uneven lengths from the cylinders, that was the problem with some old v8 engines and extractor design causing uneven flow and making a non-smooth sound when you rev...because when each cylinder fired in sucession the ones with a shorter exhaust run to the collector would run into exhaust from other cylinders and you'd get 'burst-fire' exhaust flow.... though it could be a myth, i just heard it from a guy once. and i'm not sure whether or not it would even effect the UAS pipe

[Bennoz]

The key to good collecting pipes (downpipes or joining pipes) is being 'tuned to length'. That doesnt neccesarily mean making the length of the pipes the same (although that does help) but making the join in a position whereby the exhuast pulses (the exhaust expelled from each cylinder after combustion) flows into the collection point and not hitting another pulse from the other bank of pipes. Its like 2 lanes traffic merging into one..... squeezing 2 cars into one lane is not good. It is the length of each of the pipes that dictates the merge pattern.

Generally speaking it is a good idea to have the same or similar length pipes. This is more critical when the join is further away from the engine - because the exhaust gas begins to cool as soon as it leaves the head, as it cools - it slows down in speed. So in essence, you want two lanes of traffic merging at the same speed.

[EURO]

The key to good collecting pipes (downpipes or joining pipes) is being 'tuned to length'. That doesnt neccesarily mean making the length of the pipes the same (although that does help) but making the join in a position whereby the exhuast pulses (the exhaust expelled from each cylinder after combustion) flows into the collection point and not hitting another pulse from the other bank of pipes. Its like 2 lanes traffic merging into one..... squeezing 2 cars into one lane is not good. It is the length of each of the pipes that dictates the merge pattern.

Generally speaking it is a good idea to have the same or similar length pipes. This is more critical when the join is further away from the engine - because the exhaust gas begins to cool as soon as it leaves the head, as it cools - it slows down in speed. So in essence, you want two lanes of traffic merging at the same speed.

Yep - and thats the problem with the standard FTO extractors.... you can see where the pipes join they 'crash into eachother' rather then flow down teh same path.

There was an article on this in a magazine i was reading, and one of the thinks they stated about extractors was also making sure that the pipes are of equal length.