Jump to content
SAU Community

Hypergear Turbochargers and High flow Services Development thread

hypergear

By hypergear,
in Engines & Forced Induction

 Share

Recommended Posts

adam999111 Enthusiast

adam999111

Posted
Posted (edited)

I got 280kw at 16psi at 6000rpm. I had no cat. If im correct u had a cat in ur exhaust system?.....Get rid of the cat and I can almost guarantee you will see around 20rwkw gain and response gain as there is less back pressure on exhaust wheel.

Edited by adam999111
  • Replies 12.5k
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

Lithium
Lithium

I was reading through the thread and was going to weigh in anyway, though looks like you're very much on the page I am reading from - so I'll +1 with with a bit more anecdotal evidence to support it

hypergear
hypergear

The ATR28SS15 would be a perfect turbo for your application. I didn't look into some thing even smaller as it doesn't make that much of a difference in response but did loses quite a lot of power. I'

Dose Pipe Sutututu
Dose Pipe Sutututu

^ lol... maybe I'll use a 3" intake pipe and add in more bends.. that usually gets the suuuuuuuuuuuuuuuutuuututuutut going LOL. Anyhow, some real world facts to back up the results.. errbody likes ti

Posted Images

t_revz Grand Master

t_revz

Posted
Posted (edited)

I've got something like this

http://justjap.com/store/product.php?productid=18066&cat=&page=1

Will order a mid muffler prob tomorrow or fri and see if I can fix it all up before I go to Japan then make appointment for when I get back for another run. Just wish it wasn't 2 hrs to tuner. Driving through the city with a twin plate was a nightmare.

How far back was your dyno sheet Adam?

Edited by t_revz
Hanaldo Grand Master

Hanaldo

Posted
Posted

I got 280kw at 16psi at 6000rpm. I had no cat. If im correct u had a cat in ur exhaust system?.....Get rid of the cat and I can almost guarantee you will see around 20rwkw gain and response gain as there is less back pressure on exhaust wheel.

Based on what exactly? There is barely 5hp difference between my car with the exhaust on vs off...

adam999111 Enthusiast

adam999111

Posted
Posted (edited)

I've got something like this

http://justjap.com/s...066&cat=&page=1

Will order a mid muffler prob tomorrow or fri and see if I can fix it all up before I go to Japan then make appointment for when I get back for another run. Just wish it wasn't 2 hrs to tuner. Driving through the city with a twin plate was a nightmare.

How far back was your dyno sheet Adam?

My dyno sheet is on page 292. that power and psi i stated was actually at 6200ish rather than 6000, mind you its did make just over 290 before some timing was backed off.

Based on what exactly? There is barely 5hp difference between my car with the exhaust on vs off...

Based on the laws off physics.. In an Ideal world nothing after the dump on the turbo, will obtain the best results performance wise. any restriction in the exhaust is going to result in power loss, thats inarguable, its just when the gains don't become significant enough to worry about. Please dont get hung up on numbers, it might not be exactly 20kw... As with your exhuast, it must be a good free flowing one

Edited by adam999111
kwickr33 Community Regular

kwickr33

Posted
Posted

^^^

On the same time you are also running an external gate. I've also made 290rwkws on 19psi peek at 6200rpms at 17psi on the same turbo externally gated off the turbine housing. It some appears the external gate has greater gain used on stock exhaust manifold.

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

I've got something like this

http://justjap.com/s...066&cat=&page=1

Will order a mid muffler prob tomorrow or fri and see if I can fix it all up before I go to Japan then make appointment for when I get back for another run. Just wish it wasn't 2 hrs to tuner. Driving through the city with a twin plate was a nightmare.

How far back was your dyno sheet Adam?

that's quite a restrictive cat once it warms up

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Only when it's warm? ^^^

when the core heats up, becomes an exhaust restriction, this easily can be done with a few squirts on throttle on full song.

34GeeTeeTee Grand Master

34GeeTeeTee

Posted
Posted

yeh sorry i keep forgetting i have ext gate and t_revz is internal, but he will still see gains non the less without at cat.

Will also see some decent fines from the EPA if caught :)

Dose Pipe Sutututu Grand Master

Dose Pipe Sutututu

Posted
Posted

Soon enough it will be free flowing. Just have to find a suitable muffler to compensate noise and bring it down quite a bit

I might be biased here, but HKS Super dragger, it's dead quiet man. Seriously not much louder than a stock VL 3.0..

I've used Apexi N1, HKS Hi Power, DRIFT, St Mays all on RBs, and the HKS Super Dragger has been the most quiet one.

Hanaldo Grand Master

Hanaldo

Posted
Posted

when the core heats up, becomes an exhaust restriction, this easily can be done with a few squirts on throttle on full song.

Why would it only be a restriction when it's hot? The substrate doesn't change, it just gets hot...

Will also see some decent fines from the EPA if caught :)

Eh, we're in WA ;)

t_revz Grand Master

t_revz

Posted
Posted

Yeah that's a good point. Easy to check too. I can fully understand not making as much as ex gate versions up top but should be close as I've got extensive head work and cams etc but I would think midrange should be near identical. But looking at boost I have 13psi at 3700 while Stao's latest was at 21 so no wonder it's 110hp lower.

Going to check actuator preload next day off and see if that's ok too. Try to double check VCT ASAP. Come to think of it I haven't heard the solenoid clicking like it used to. Vct obviously affects boost curve in a big way?

GTScotT Grand Master

GTScotT

Posted
Posted

Vct is practically make or break for an RB25 on vct based cams.

if that's not working deduct something like 1000rpm for boost threshold. its silly.

blah_blah Grand Master

blah_blah

Posted
Posted

Well it was done but cos I dropped the car off before Sean got there and we didn't chat he set boost to 18psi max and very safe. Only made 340hp but he told me to ignore the number as he can never reproduce Hp numbers that hypergear customers expect. So I drove home and gave it a couple squirts and it feels good. Maybe it was similar power but just low reading dyno...until I compared my result to previous results and it seems lazy on boost. Might need more preload. So thinking of taking it back after doing the exhaust and Sean said we can try put 21+ down its throat

Any other thoughts? Mine is red

Power

photo_zpsfe9a9fae.jpg

Boost

photo_zps4956dc8c.jpg

That's a little disappointing...

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

    • MBS206
      NC MX5

      By MBS206 · Posted

      There's a huge reason manufacturers are tuning in dead flat torque curves... Make them reliable (and more drive able)
    • GTSBoy
      AC not coming from top vents

      By GTSBoy · Posted

      What HVAC actuator is under the steering wheel? Do you mean on the RHS of the centre console, immediately to the left of your shin? If so, then yes, it is probably that one, because that is the mode door actuator, and from what I know, it's still a pain in the arse to replace. I don't know about whole dash out, but you certainly have to rip into the centre console section. I don't know if it's covered in the workshop manual, as I haven't spent much time looking at those parts of it. (and by "the workshop manual, I mean the R32 GTR one, which is the most comprehensive one we have, and it should be similar enough between that and later cars to serve as a guide).
    • dbm7
      Shifting questions

      By dbm7 · Posted

      ...oops. forgot the TCU end...
    • Sleepergm
      Custom titanium intake

      By Sleepergm · Posted

      No I got mine from a friend that had fabricated one … but I had to fit it to my setup which was a hks turbo setup. His was a Garrett -7. So one of my turbos was not a flange for one side … then I had a leak in the welds I had to find a weld shut … in the end the setup was decent priced but I spent a lot to get it fitted. A couple companies I checked would make it but you’re talking 7-9k aud with titanium. No joke mine was 6-7k even second hand after I had to fit it in Hong Kong … labour is expensive here. 
    • Kinkstaah
      NC MX5

      By Kinkstaah · Posted

      I'd just like to restate that I don't think anyone here is actually hating I recently sold a car part to a guy who was building a forged auto R34, with MV stall and aiming at ~450kw. I told him that I'm him, from the future and to stop after it explodes once. I told him I knew he won't listen the first time, and that's fine. But if my predictions do come true - Change direction faster than I did. I also said it's probably no coincidence that the dyno plot of a reliable turbo engine starts to look a lot like a N/A motor. :p
×
×
  • Create New...