Jump to content
SAU Community

Recommended Posts

  • Replies 47
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

The only real benefit with stainless steel is it's resistance to Corrosion meaning it will last longer and it's stronger....Flow characteristics would be very simular, if not exactly the same as an identical mild steel system.

Edited by Ryanrb25

its in the way the ceramic inner to the cat has been made will flow more than a normal cat that is all nothing special in the steel only that it ISN'T Chinese its Aussie blue steel and or sometimes from NZ

Looks the goods!! Beleive he did some work for Simon as well and that was a great sounding exhuast!

2x2.5 inch pipes is going to flow more then 1x 3inch?? Or so you'd think (5inches of pipe compared to 3 inches makes a big difference)

Personally i'd rather keep the cat and loose a little bit of performance and not cop the massive fine for not running a cat but thats just my opinion

Looks the goods!! Beleive he did some work for Simon as well and that was a great sounding exhuast!

2x2.5 inch pipes is going to flow more then 1x 3inch?? Or so you'd think (5inches of pipe compared to 3 inches makes a big difference)

Personally i'd rather keep the cat and loose a little bit of performance and not cop the massive fine for not running a cat but thats just my opinion

Not quite - area = pi*r^2, so:

3" pipe = 4,560mm2

2x2.25" = 5,130mm2

2x2.5" = 6,333mm2

5" pipe = 12,667mm2

so as you can see, 2x2.5 is definately not as much area (flow) as a 5" pipe by a long shot

^Not necessarily. There has been a fair bit of research (well particularly for V8s) and I think the results concluded there was VERY little difference between twin pipes and singles, and if anything a single was maybe 1-2% better flow from memory.

This is due to the single having less swirling restriction from memory, however for now I can't find the evidence to backup my claims.....

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

    • Is the panel filter one that is oiled? Have you ever cleaned or touched the AFM?
    • So.... the K&N air box thingo was too big, ended up gifting it to a mate, well, by gifting it he actually supplied food and beer at the pub,  which was nice, as it will not sit on a shelf in the garage for the next 10 years I did trim up some of the existing stuff to neaten it all up and gave it some wrinkle paint, unfortunately it currently has a used and abused mish mash of different types of hose clamps, 4 big fat T bolt type (shit), and a few normal clamps of vairing sizes and brands, but..... only until the 6 constant tension black worm clamps that I ordered from EFI solutions turn up next week Currently the current hose clamps are triggering me hard, LOL Is this the final version, probably not, I really want just 2 silicone pieces, a straight bit of silicone from the filter to the MAF is easy and will happen as soon as I head into Just Jap tomorrow, the problematic part is a 30° silicone bend from the MAF to the TB that I can connect the engine breather from the head, I found that there are bulk head fittings for boat bilge pumps that should work, but until I can get a 30° silicone bend the alloy pipe, and the 11ty thousand hose clamps, are there for the foreseeable future 4 hose clamps are golden, 6 are grudgingly acceptable, the 8 currently holding it all together is just taking the piss    I've also ordered 60 more retaining wall blocks for the front yard, I mis-gonculated the height that was required to get above the base of the Photinia's (red robin's) that are the hedge behind the front fence, currently it is 2 blocks high, and about 1/2 a block short, so going 3 blocks high will be above the base of the red robin's, and allow some room for mulch
    • It is the stock air box with the panel filter. Everything else is stock except the exhaust at this point, as I also went back to the cleaned 270cc injectors. I will check the RPM when the IACV is unplugged and report back.
    • As MBS suggested if this is happening when the engine is cold you're going to want to remove the intake air regulator and verify resistance + that the shutter is physically opening and closing. At -20C should be fully open, 20C half open, over 60C fully closed. At 20C should be 70-80 ohms. For AAC valve testing using a Consult cable see if you can raise and lower the idle by commanding more or less AAC duty cycle. Hopefully it's pretty linear as well, shouldn't be like 30% AAC valve is barely idling and 40% is 1500 rpm.
    • Bloody apprentices! 🙄
×
×
  • Create New...