Jump to content
SAU Community

Tial 44 Mm Wastegats Good For What Power / Turbo Sizes?

Chris Wilson
 Share

Recommended Posts

Chris Wilson Proficient

Chris Wilson

Posted
Posted

I have bought a Tial 44mm wastegate kit for my single turbo RB25 engine which should make 500 flywheel horsepower 370 Kw). I have an all steel RB26 in build, which I want to put something like a GT4088R on, and hope to make a maximum of 700 BHP (520 Kw) on race fuel. Is this same wastegate big enough, or do I need their 46 mm one?

Thanks.

Sydneykid Grand Master

Sydneykid

Posted
Posted

There is a long thread on how ot size wastegate correctly, here is the abreviated version.....

I have pretty good success using this formula to determine external wastegate sizes;

Airflow in lbs per minute = diameter of wastegate in mm X boost correction factor

So let's apply it to your car;

300 rwkw = 480 bhp

480 bhp = 44 lbs of airflow = 44 mm wastegate

Now if you want to run 19 psi, then that's the right size wastegate.

But we need to apply the boost correction....

My experience indicates that to get 300 rwkw out of a GT3040 you would need to run around 1.5 bar (22psi). So using the formula...

44 / 22 X 19 = 38 mm.

For those who haven't read the thread..............

http://www.skylinesaustralia.com/forums/sh...ead.php?t=43638

Hope that helps

:dry: cheers :thumbsup:

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
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • PranK
      Duncan's V37.......race car?

      By PranK · Posted

      My extinguisher mounted like this unscrewed a little (Maybe from the chair sliding forward) and dumped a bit of white on my mats. I'll need to get a more narrow one for future.
    • MBS206
      Shoota's R33 GT-R RB30/26

      By MBS206 · Posted

      I totally couldn't do the whole kids taking up my life thing! 😮 I find it bad enough doing 45 hours in 4 days, and then fitting normal adulting life into the other 3 with no kids! As for my mates race cars, they're AMG C63 setup for production racing. The original is what has just been stripped and a brand new shell built. The original is then going away to have some panels straightened, then it will be put back together again. Then there's a third that will shortly head off to have a roll cage put in, then build it up too. And potentially a fourth to be built too... Oh, and he has two Renault Clio D class production cars, ha ha. And when he's not racing them in the Australians and QLD production championships, he's been racing one of Chaz Mostert's Lamborghini's in GT4. They just won GT4 at the 12 hour in the Lambo. We're pushing to finish the new AMG as it has its first round (and potentially its first shakedown/outing) in under w weeks for Round one of QPC, and that round is really the shakedown to make sure it's all good for the Bathurst 6 hour, which I'll be at too. Ha ha ha Working on my project is different to his, I slowly tinker and work ways to make things happen on a shoe string budget. Hes in a good position that he has a massive workshop full of parts and tools, ha ha. He also looks after me. When his air compressor died, he just needed it working, so bought himself a new one and gave the old to me. Sand blaster unit too, and a 20t pressing. And pretty much all the shelving in my shed too as he upgraded all of his (the stuff he gave me is the expensive black Bunnings heavy duty stuff)!   I enjoy working on his stuff. No decision paralysis, and anything that's needed parts wise is just there. Plus, then I get to be hands on at the track in real racing, not just club day stuff.
    • Ozdavroz
      NC MX5

      By Ozdavroz · Posted

      I know which one I'd prefer to have in my garage, and which one I'd actually drive as intended
    • PranK
      My 1975 C110 Skyline Restoration

      By PranK · Posted

      Yeah mate, no probs. Just swap the email addresses?
    • Kinkstaah
      NC MX5

      By Kinkstaah · Posted

      I definitely agree with you there - I never click on content for cars I would never ever be able to get or compete with/against/be seen next to. Seeing a MX5 compete with a FD RX7 will make people upset though, for sure. Even in 2.5L Turbo form which is pretty grass roots. (or at least as grass roots as classic cars can be) Yes we're all classic car owners now.
×
×
  • Create New...