Jump to content
SAU Community

Recommended Posts

coby extractors (about $350) - www.partsco.com

fujitsubo extractors - (about $2500) - www.takakaira.com

i only have experience with coby extractors (quite a few others on here have them) and they gave a lot more low to midrange power making the car a lot quicker for normal, everyday driving. i maybe lost a little top end power, but it may only feel like that due to the increased low to mid power (if that made sense). i highly recommend them.

i too have the coby extractors, and gregs right, low-mid is great, however i didn't notice that drop in top end - it still kicks at 4-5 thou, and stays on a little longer if anything. the 2litre might behave a bit differently though.

I was thinking about that sucking noise under power though - has anybody stood in front of the car and revved it to see where the noise is coming from? i still have the stock airbox and intake snorkel, and the noise is still quite pronounced. Might be noise of flow through the extractors themselves rather than the intake...? ill have to have a closer listen on the weekend....

what i was trying to say is that the top end power was probably unchanged but it just felt less in comparison to the power that was made available in the low to mid range. still making no sense!?

pstanbis, the sucking sound is very annoying isn't it :rofl: i was told by an exhaust shop that it is resonance in the extractors. ways to reduce the noise (by muffling the sound):

. wait for them to be coated in carbon/exhaust residue. mine quietened down after about 1500km's, but only a little.

. wrap them in exhaust wrap. i considered this but its quite expensive, if not done properly shortens the life of the extractors. its a bit of a hassle to take the extractors off, clean them of all rust etc, then paint, wrap and paint them, and then put them back on.

I was annoyed at the fact that it's very hard to run a cold air pipe from lower bumper to the filter box - coz as you all should know, the air flow through the filter goes DOWN. Instead, I got a K&N pod and made a FULLY SEALED (screws) and INSULATED heat shield from aluminium sheet and ran a 3" PVC pipe up onto the pod. Runs fantastic on the higway.

Greg,

Cripes - I'd love post a pic but I don't have a digital camera. I'll Explain it differently :

Air enters the scoop just above the radiator and flows into the top half of the filter box, passes through the filter into the bottom of the box, then runs off to the throttle body.

A cold air feed pipe normally runs from the bumper area directly into the filter box, but with the above setup the pipe it's a lot harder to get a large sized cold air pipe to feed the top half of the filter box. So I just went for a pod and a pipe that feeds the pod.

Does that explain it better?

hey greg i now have that sound ur describing. i got the resonator and middle muffler taken out of the hks system and it now sounds so bad i dont want to drive it. i went back and got a new resonator which almost cured it but the car is too quiet now, i was thinking of selling the hks system but im now not gonna bother as the new engine is on the cards.

hey john sorry to hear your exhaust sounds shit! i was considering removing the middle muffler to give it a tougher sound but now i've read that i won't bother.

i finally discovered what was making the sound, this might help you, here's the story:

I was driving along and all of a sudden my exhaust got REALLY loud. i stopped and looked under the car and sure enough mr muffler (who fitted my extractors and cat) had failed to use split washers and the bolts on the cat had vibrated loose, letting exhaust gas escape. so i drove around for a bit enjoying the exhuast note (:() and then took it home and reversed onto ramps. i removed the cat and discovered two things:

1. mr muffler had combined 2 broken gaskets to try and make a good one, it obviously failed.

2. in the cat there was heaps of little drops of weld mr muffler had failed to remove.

these 2 items were the cause of my dodgy sound - the leaky gasket and the weld droplets. so i reused an old gasket i hard lying around (it was heaps better than the ones mr muffler installed) and vacuumed all the weld droplets out of the cat. the exhaust sounds awesome now and i'm going to take a sound clip soon and post it up (just for your joe, if you're reading this :D),

cheers

greg

I was going to get some extractors soon!

Why the huge difference between coby extractors and fujitsubo extractors??

Does it make a big enough difference to warrant the noise and money?

Secondly I only have a stock exhaust and would change at the same time! What brands would be good at reasonable price?

Can any one tell me the KW given before or after? I really have no idea what the power of my NA R33 is???

  • 2 years later...
I'm thinking i'll go for the K&N panel filter and try to incorporate twin air vents on each side of the bonnet for better air flow. Might try getting some stiff pipe hooked on underneath the bonnet going from the air vent to the air box. I might also try some flexi pipe running from the botom of the bar into the engine bay. Just ideas.... :P

Also, can anyone recommend some Brand name extractors and their experience with them? what kinda power boost should i be expecting?

i have a 91 R32 GTS with a RB25 n/a and i have just changed my ashmatic air filter to a proper k&n filter and the power difference was amazing. and i have also had fited a set of custom made pacemakers fitter to it about a year ago and it has a 2.5" exhaust right through to a super cat muffler. sounds awesome. power increase wasn't neck breaking but better. but had way better sound and in gear acceleration.

  • 4 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • For these last 7 years of ownership, I've always had to use a small scissor jack under one of the front tow hooks to raise the front just enough so my low-profile jack fits under to reach my subframe jack point. I'm beginning to get annoyed of always having to do this. Are there any lower low-profile jacks that fit under the gtr lip on a dropped car?
    • Seat of the pants assessment of the new intake: The car is way less "doughy" when hitting the loud pedal, especially off idle when stopped or in traffic, I did use a cheapo lazer thermal thingo to measure the temp around where the pod filter got its air, it was between 55 - 60°C, in saying this the car was shut off and not moving, so the OEM intake pipe was not supplying any fresh air to where the pod was when the car was at least moving A weird bonus was induction noise on the throttle in the cabin increased a bit,  I was worried that I was actually going to lose some of that induction noise I love so much, outside though, when I got the daughter to do a WOT drive by pass for me, the induction noise has increased alot when on the throttle, not quite ITB doort, but well up there I'm extremely happy with the results and have been exploring the country roads in the region  As for house mods: 1.New front fence is up and is awesome, it really upgraded how the joint looks from the street, and the added security is nice 2. Electricians have replace some interior lights, and with more lighting in the garage, a few new motion detecting lights out the front above the garage, front room, and at the front door, which I have already found heaps helpful coming and going, also now has fancy pants CCTV all round the house The only hold point for power though is the solar and batteries due to supply issues, although this will happen over the next few weeks 3. I have done a heap of landscaping out the front and I'm almost ready to do a new small retaining wall with some nice blocks to replace the brick and cemented in rocks around the raised garden beds cemented in river stone "was the fashion at the time" the house was built. I currently have a pallet of retaining wall blocks and 2 bulka bags of 20mm blue metal to replace the wood chip that is in the raised garden beds around the house 4. I now have 3 big raised garden beds for out the back to grow some vegetables, about 70cm high, 200cm long and 100cm wide 5. My 2 compost bins are already pretty full with brown, green and kitchen waste from the landscaping I'vedone so far, but they will probably take a few months to break down, so anything else that gets chopped, trimmed, and kitchen waste will just start filling the base of the raised garden beds to about 30cm before I start throwing 40cm of good compost, and stuff, for the vegetables to grow in, I'll need a few ton of compost and soil, but the local supplier can sent me bulka bags of the stuff Basically the logs, wood chips and a few strategically placed rocks for drainage, will give the beds some good organic materials down low to break down over time, and they will hold moisture during the warmer months to save the water in my big arse water tank if we don't get alot of rain So, all in all, the car and house mods are going well, and I'm really enjoying being retired, I sleep in too 0700 and slowly plod around inside until I feel like actually doing anything, and only work in the yard for as long as want, which has actually been alot over the last few weeks,  although when you look at it, it seems that not a huge amount of work has been done,  until I look at the before I started the work pics Happy days and good times indeed 
    • hahaha yeah. Plan is to get side skirts and probably just rear pods. But going to do them one-by-one. I've got a set that I really like from RHDJapen, but that one isn't shipped to AU. So need to find someone who can get it for me
    • Here's an idea, answer the questions I asked you as they are trying to work out WHY the LSD will be binding up in a straight line.
×
×
  • Create New...