Jump to content
SAU Community

Hypergear Turbochargers and High flow Services Development thread

hypergear

By hypergear,
in Forced Induction Performance

 Share

Recommended Posts

  • 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

Elusivity Enthusiast

Elusivity

Posted
Posted

Definately. I have another 2 hypergears to tune soon. Well 1 until Kasko buys his ss1

You'll most likely make that 3 soon, I called you Wed night - still pretty keen to let you tune the SS2 on my auto GTT

Link to comment
Share on other sites
jet_r31 Mentor

jet_r31

Posted
Posted (edited)

See the way I see it if you are running the max airflow a turbo can provide at redline, then that same airflow at x psi will be x+y psi in the midrange, hence you should run more boost in the midrange to make the most of the turbo.

Like if you look at the compressor map then the same airflow at redline at 20psi is 25psi in the midrange. So if you can get away with running more boost at redline, you should increase the midrange boost to make the most of it.

Which is why I think turbos should be set based on airflow not psi. Though if you do it this way you are always going to have a massive midrange spike and have torque fall off by redline which just doesn't feel as good for some people, though for drifting etc it is perfect.

Thoughts people?

Well for a start you will have a LOT more cylinder pressure around peak torque, where you don't want it..

cheers

darren

Edited by jet_r31
Link to comment
Share on other sites
copycutter Experienced

copycutter

Posted
Posted

Look at the 3L TT inline 6 BMW engines, all sorts of trickery to keep the torque flatish and not have massive peaks like our cars.

But the sharp rise is what makes a fun street car and makes passengers grab the jesus handle. ;)

Link to comment
Share on other sites
DVS JEZ Grand Master

DVS JEZ

Posted
Posted

JET 31 - Why dont u want maximum torque? Thats the funnest part, yes its more det prone there but if the fuel is good enough then there is gains to be had, then let the boost build to redline and make crazy power figures.

If only...

Link to comment
Share on other sites
hypergear Grand Master

hypergear

Posted
  • Author
Posted

Tao i agree, E85 is cheating. 98 is the devil.

I think its more to do with the wastegate gate setup. When Trent did the internal and external gated test, the hug drop in internal gate setup means the turbine is cooping with high exhaust manifold pressure as well as heat after certain rpms.

From experiments that I've conducted a large external gate acts as a secondary turbine that carries out compressor flow only when needed.

So getting good results from an internally gated setup: Comp flow = turbine flow

on the external gate perspective: Comp flow = Turbine flow + External gate flow.

As if I run G3 compressor onto a SS1PU's turbine with a large 60mm external gate, I should get the 300rwkws peek power from the G3 while having the 20psi by 3300RPMs response of the SS1PU. I will do some tests on that when I’m over with stockie boltons.

Link to comment
Share on other sites
Rolls Grand Master

Rolls

Posted
Posted

Well for a start you will have a LOT more cylinder pressure around peak torque, where you don't want it..

cheers

darren

You always have peak cylinder pressure at peak torque... that is what peak torque is. What I am saying is you can increase your midrange torque for any given redline torque if you are running flat boost. Assuming of course you are not limited by detonation due to fuel etc.

Link to comment
Share on other sites
DVS JEZ Grand Master

DVS JEZ

Posted
Posted

Tao i proved exactly what u are saying with my old sr20 and .6 disco potato. I changed it to a 50mm external gate setup and made an extra 15-20kw all over. Its amazing how much extra the car can breath

Link to comment
Share on other sites
ARTZ Grand Master

ARTZ

Posted
Posted

JET 31 - Why dont u want maximum torque? Thats the funnest part, yes its more det prone there but if the fuel is good enough then there is gains to be had, then let the boost build to redline and make crazy power figures.

If only...

its a traction thing..its the way the max toque is delivered..

I know my with old turbo came on so much smoother with a factory airbox even ,just putting the pod on it would make it snap noticably harder into boost/max torque making it easier to lose traction ,which is fun but I prefered the smoothness and tractability with the airbox, even if it was making a few kw less...I could feed power on hard without slipping around or kicking out so much..

Guess it depends if you want to slide or drive..

Link to comment
Share on other sites
GTScotT Grand Master

GTScotT

Posted
Posted

Ur on ur own with that one. I see it as even if u have the power to break traction, with the correct throttle control u can be just as fast

IE me and you testing animals in the rain lol

Link to comment
Share on other sites
ARTZ Grand Master

ARTZ

Posted
Posted

Im just sayin it was a little easier to drive, not as much skill needed just smash it and go...

Sure you can do anything with "correct throttle control" but hey, if you have skill you dont really need synchros in your gearbox either...but they sure do make life easier...lol

Link to comment
Share on other sites
hypergear Grand Master

hypergear

Posted
  • Author
Posted

Some Modifications that I've done to a stockie R33 21U turbo:

4inch inlet adaptor with SS3 comp wheel:

1.jpg

2.jpg

Looks all sort of stock I guess.

3.jpg

Would be awsome if I can crack 300rwkws with it internally gated on pump 98. :D

Link to comment
Share on other sites

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

    • klutched
      GOT SUM's RB34

      By klutched · Posted

      This morning I carefully reinstalled the manifold and started looking at a couple of things I need to do.  Heat wrap arrived sometime today so I popped into the shed with the missus dishwashing gloves and started wrapping the first half of the dump and the screamer/plumb back.  Once I do the second half I'll be able to final fit the turbo and exhaust up.  Also pulled the harness out today and started terminating it at the ECU end. A connector is done, just need to run the remaining wires that arent in the harness - 12v, gnd and couple I/O
    • Dose Pipe Sutututu
      Rear suspension upgrades

      By Dose Pipe Sutututu · Posted

      A31 is pretty much the same thing without HiAIDS I mean CAS, no improvement lol. Not to late to send it.
    • carnoobb
      Newbies

      By carnoobb · Posted

      Thanks for all the replies! I also wanted to ask if wheels that were fitted on Ford Falcons would fit the 350GTs as well? In the area I'm at there aren't that many options for secondhand wheels and new ones here are way out of my budget. From what I've seen, most of the wheels that are available that were fitted on Ford Falcons have an offset of +33 to +36, with a centre bore of 70.5mm whereas the stock 350GT's ones are 66mm, can't seem to find any hubcentric rings that fit that difference though. 
    • sonicii
      Newbies

      By sonicii · Posted

      215/45/18 tyres are probably a little on the low side compared to the factory tyre, it should be closer to a 245/45/19, which will get you about an extra 11mm of height, and should make you speedo read a bit closer to reality. 245/45/19s will be a bit too far the other way and you risk a speeding ticket as your speedo might read slower than your actual speed.  245/40/19s would be correct if you are going to 19in rims, they will give you a similar total diameter to the 245/45/18 tyres.  
    • GTSBoy
      Rear suspension upgrades

      By GTSBoy · Posted

      That's something I forgot to put in my list. The aggressive anti-squat in R32 is a f**king menace. I still need to decide if I'm going to drag the subframe out of my car and weld in the GKTech corrector kit. The main reason to dither is the need to switch to spherical joints in the lower arm to account for the twist induced in the rear pivot caused by lowering the front pivot. And yes...we do put better subframes in R32s, and I wish I'd gotten an S14 one instead of an A31 when I did the "take off and nuke it from orbit" HICAS delete all those years ago.
×
×
  • Create New...