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
      Mistakes were made, my R34 Story

      By MBS206 · Posted

      The oil pressure sensor for logging, does it happen to be the one that was slowly breaking out of the oil block? If it is,I would be ignoring your logs. You had a leak at the sensor which would mean it can't read accurately. It's a small hole at the sensor, and you had a small hole just before it, meaning you could have lost significant pressure reading.   As for brakes, if it's just fluid getting old, you won't necessarily end up with air sitting in the line. Bleed a shit tonne of fluid through so you effectively replace it and go again. Oh and, pay close attention to the pressure gauge while on track!
    • Kinkstaah
      Mistakes were made, my R34 Story

      By Kinkstaah · Posted

      I don't know it is due to that. It could just be due to load on track being more than a dyno. But it would be nice to rule it out. We're talking a fraction of a second of pulling ~1 degree of timing. So it's not a lot, but I'd rather it be 0... Thicker oil isn't really a "bandaid" if it's oil that is going to run at 125C, is it? It will be thicker at 100 and thus at 125, where the 40 weight may not be as thick as one may like for that use. I already have a big pump that has been ported. They (They in this instance being the guy that built my heads) port them so they flow more at lower RPM but have a bypass spring that I believe is ~70psi. I have seen 70psi of oil pressure up top in the past, before I knew I had this leak. I have a 25 row oil cooler that takes up all the space in the driver side guard. It is interesting that GM themselves recommend 0-30 oil for their Vette applications. Unless you take it to the track where the official word is to put 20-50w oil in there, then take that back out after your track day is done and return to 0-30.
    • PranK
      My new to me M35 Stagea wagon

      By PranK · Posted

      Nice, looks great. Nice work getting the factory parts also. Never know when you'll need them.
    • Chupapy
      New r33 owner

      By Chupapy · Posted

      Thanks @jtha7 I will have a look around tomorrow but it is a prick of a spot. These are some photos i tried taking 
    • GTSBoy
      Mistakes were made, my R34 Story

      By GTSBoy · Posted

      I take it that the knock retard is from bearings tapping a little tune? Thicker oil is a fragile bandaid. You need a much bigger oil cooler and probably the bigger pump being discussed.
×
×
  • Create New...