Jump to content
SAU Community

Recommended Posts

Hi all,

 

I'm making around 250rwkw in my r33 gtst with a hypergear op6 highflow.

 

My exhaust of right (3 inch system) now is a bellmouth dump pipe, to venom 100cell cat, then straight to a jasma cannon. However the jasma cannon reduces to around 2.5 inch.

 

This setup is fairly loud but not too bad when cruising and light throttle.

 

I want to replace the cannon with a piece of 4 inch straight pipe. Mainly because i want to remove the 2.5 inch restriction, i like the look and i can do it fairly cheap. I don't want the exhaust to be insanely loud or drone heaps. A little louder than now is ok.

 

If i install a hot dog resonator after the cat, will this be enough to reduce noise a bit and keep drone down? Or will i have to install a different type of muffler?

 

 

Link to comment
https://www.sau.com.au/forums/topic/469953-exhaust-system-help/
Share on other sites

'zactly.  There is a logical limit to how big a muffler under the floor can be.  You obviously need 3" in and out, and it is quite likely that you will need it to be centre-centre because it will be going in in place of a piece of straight pipe.  So your typical oval mid muffle will only be so tall and so-so wide.  Your main degree of freedom is the length, and there will only be so much freedom there.  Get the longest one in the catalogue.

I just checked my exhaust and the way its the piping goes doesnt allow space for a mid muffler.

I also drove the car with a straight pipe (was doing hicas delete so had to drop rear exhaust) just to see how loud it was. Needless to say its unbearingly loud, i got about 20 angry looks even though i drove around at low rpms.

Can anyone recommend me a rear muffler ( preferably dual tip ) that flows well but is quiet?

5 minutes ago, vxsr33 said:

I just checked my exhaust and the way its the piping goes doesnt allow space for a mid muffler.

I also drove the car with a straight pipe (was doing hicas delete so had to drop rear exhaust) just to see how loud it was. Needless to say its unbearingly loud, i got about 20 angry looks even though i drove around at low rpms.

Can anyone recommend me a rear muffler ( preferably dual tip ) that flows well but is quiet?

http://www.smb.net.au/ovalmufflers.htm

They will do a twin tip if you ask

I added a photo of a single tip, 4 inch offset in, centre out for reference. Can be made I any length you want. 

IMG_2027.JPG

  • Like 1
Or leave it as is. At 250KW you are not going to gain a lot from going to 3in. Save up til you can afford a good muffler.

The main reason i want to change is the drop to 2.5 inch really bugs me and I'm over the look of the cannon.

Not expecting any noticeable performance increase.
  • 2 weeks later...
  • 1 month later...

And the pipework looks 3 inch while the his exhaust is 3.5 if I'm right?

 

Was looking at this before but had another idea, joining the end of the chamber the end where it's capped to the actual exhaust (without actually drilling through. Just not sure if it'll still be effective that's all)

 

Saves the hassle of having to find a way to mount the chamber

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

    • The rain is the best time to push to the edge of the grip limit. Water lubrication reduces the consumption of rubber without reducing the fun. I take pleasure in driving around the outside of numpties in Audis, WRXs, BRZs, etc, because they get all worried in the wet. They warm up faster than the engine oil does.
    • When they're dead cold, and in the wet, they're not very fun. RE003 are alright, they do harden very quickly and turn into literally $50 Pace tyres.
    • Yeah, I thought that Reedy's video was quite good because he compared old and new (as in, well used and quite new) AD09s, with what is generally considered to be the fast Yokohama in this category (ie, sporty road/track tyres) and a tyre that people might be able to use to extend the comparo out into the space of more expensive European tyres, being the Cup 2. No-one would ever agree that the Cup 2 is a poor tyre - many would suggest that it is close to the very top of the category. And, for them all to come out so close to each other, and for the cheaper tyre in the test to do so well against the others, in some cases being even faster, shows that (good, non-linglong) tyres are reaching a plateau in terms of how good they can get, and they're all sitting on that same plateau. Anyway, on the AD08R, AD09, RS4 that I've had on the car in recent years, I've never had a problem in the cold and wet. SA gets down to 0-10°C in winter. Not so often, but it was only 4°C when I got in the car this morning. Once the tyres are warm (ie, after about 2km), you can start to lay into them. I've never aquaplaned or suffered serious off-corner understeer or anything like that in the wet, that I would not have expected to happen with a more normal tyre. I had some RE003s, and they were shit in the dry, shit in the wet, shit everywhere. I would rate the RS4 and AD0x as being more trustworthy in the wet, once the rubber is warm. Bridgestone should be ashamed of the RE003.
    • This is why I gave the disclaimer about how I drive in the wet which I feel is pretty important. I have heard people think RS4's are horrible in the rain, but I have this feeling they must be driving (or attempting to drive) anywhere close to the grip limit. I legitimately drive at the speed limit/below speed the limit 100% of the time in the rain. More than happy to just commute along at 50kmh behind a train of cars in 5th gear etc. I do agree with you with regards to the temp and the 'quality' of the tyre Dose. Most UHP tyres aren't even up to temperature on the road anyway, even when going mad initial D canyon carving. It would be interesting to see a not-up-to-temp UHP tyre compared against a mere... normal...HP tyre at these temperatures. I don't think you're (or me in this case) is actually picking up grip with an RS4/AD09 on the road relative to something like a RE003 because the RS4/AD09 is not up to temp and the RE003 is closer to it's optimal operating window.
    • Either the bearing has been installed backwards OR the gearbox input shaft bearing is loosey goosey.   When in doubt, just put in a Samsonas in.
×
×
  • Create New...