Hypergear Turbochargers and High flow Services Development thread

[admS15]

is that int. or ext. gate? Also just wanted to point out that you should probably make sure you have the right details of the date and which turbo you are testing on the run id of the graph. It will be confusing for people in future when they are looking at results throughout this thread and you are talking about 1 particular turbo but the run id lists another.

[hypergear]

Its the same car. Both results are internally gated on P98 fuel:

R34 GTT RB25DET NEO unopened engine.

- Adaptronic​ ECU
- 1000CC ID injectors
- Factory cams, cams gears, and all manifolds.
- HyperGear ATR43SS2 Internal gated RB25 bolton Turbocharger
- JJR 3 inches turbo back exhaust with bleeder valve.
- Walbro 470L/H Fuel pump
- 4 inches induction pipe
- Split fire coil packs
- PWR 600x300x81mm intercooler
- Tuned by Trent Hewitson​, Chequered Tuning​.

[admS15]

yep, fair enough just making the point

[Dose Pipe Sutututu]

I have seen 430+ a few times on the factory manifold with the gate off the housing. Welding it off the manifold could work well if you can get in and die grind it afterwards. I doubt you will see much in the way of gains between them.

No need for stabilizer with pump e85, I have been on Caltex/United e85 for 6 odd years without running a stabilizer and never cleaned my filters or injectors.

Watch your timing, I much prefer more boost and less timing as you previously mentioned Johnny.

I tried a mixture of things, first few runs pushed the SS2 (circa 2013) to 26psi, but it bled down to about 23psi.. no real difference in power, then tried a few more runs each time less boost. Seemed pretty happy at 23~24psi however no difference in power.

This is when I started adding in more timing, kept on adding more and more and more to the point where it stopped making power (however was listening for audible knock, which I couldn't hear nor see on the logs).

Pretty much ended up with the following below (timing trace through logs vs. boost).

[hypergear]

It could be the tires used. If its threading on the rollers it will under read. Does it feel stronger on road with the additional timing in?

[Dose Pipe Sutututu]

It could be the tires used. If its threading on the rollers it will under read. Does it feel stronger on road with the additional timing in?

I initially ran the car on the dyno and it made 290kW so I got my mate and the shop owner to hop in the back and it read 310kW, after that I strapped the car down fairly tight.

I am thinking there's a restriction on the hotside/exhaust as I am running a very quiet exhaust system + a cat.

I don't think it's timing related, as you can see I'm running a bucket load of timing (even the shop owner was like you're leaning too much on the timing to make power). However one thing to note, the car was running E61 as I only decided that morning to fine tune the timing map, so potentially the power shortfall could have been through diluted concentration of ethanol.

After the new year, I'll put a new manifold on from HAVOC and see what the car can make before the motor grenades itself hahahaha

[hypergear]

Put ATR45SAT on it when its going to Havoc, and max that out.

I've remembering reading a discussion about few members whom are chasing my results. First of all Trent definitely does not deliberately tune a dangerous amount of timing to boost up results, he tunes it no different to any other cars. Turbocharger is nothing but a hot dryer without effective supporting mods, I will pin point few that have made a noticeable difference to my own car as some of you already seen.

1. At 3 inches metal induction pipe with a good pod filter

Differences VS stock:

2.Good front mount intercooler:

3. Big exhaust or add an exhaust Tee:

[CEF33Y]

Is that last graph comparing normal 3 inch dump, to your dump with the "screamer" pictured??

So by the graph, you picked up ~45rwkw by doing the vent mod?

[Dose Pipe Sutututu]

Put ATR45SAT on it when its going to Havoc, and max that out.

No 45SAT

I'm happy with the lag of the SS2, anymore and I might as well just have a dyno queen that's absolutely useless for the track.

A little more power would be great and maybe more response..

I do like the looks of the new SS2, would be perfect for track use. 4k worth of rpm to use!

[zebra]

No 45SAT

I'm happy with the lag of the SS2, anymore and I might as well just have a dyno queen that's absolutely useless for the track.

A little more power would be great and maybe more response..

I do like the looks of the new SS2, would be perfect for track use. 4k worth of rpm to use!

EFR7163

[Dose Pipe Sutututu]

EFR7163

LOL yes, but I'm not made of money and getting a turbo that's worth the cost of my entire car is idiotic!

EFRs belong on the likes of a GTR EVO Supra RX7, not some shit box R33 GTSt lol

[hypergear]

There has been quite few upgrades to SS2 since your one was built. When sending the manifold to Havoc, send your turbo down in I will have a look to see what updates can be applied to the existing housings.

[Dose Pipe Sutututu]

There has been quite few upgrades to SS2 since your one was built. When sending the manifold to Havoc, please send your turbo down in I will have a look to see what updates can be applied to the existing housings.

Havoc has my manifold already, but I haven't taken off the turbo yet as I still need the car for an upcoming track day.

Note that I will need a new rear housing as discussed as I'm currently running a scotty mod housing

[CEF33Y]

Is that last graph comparing normal 3 inch dump, to your dump with the "screamer" pictured??

So by the graph, you picked up ~45rwkw by doing the vent mod?

Is this right Stao, or am I reading it wrong?

[kingtube69]

No 45SAT

I'm happy with the lag of the SS2, anymore and I might as well just have a dyno queen that's absolutely useless for the track.

A little more power would be great and maybe more response..

I do like the looks of the new SS2, would be perfect for track use. 4k worth of rpm to use!

I can confirm the lag on the 45 is quite high (posted my dyno graph in here somewhere earlier). I don't mind it but then again, it's not a track car. Maybe one day I'll get sick of it and go SS2 or something of the sorts.

[Dose Pipe Sutututu]

I can confirm the lag on the 45 is quite high (posted my dyno graph in here somewhere earlier). I don't mind it but then again, it's not a track car. Maybe one day I'll get sick of it and go SS2 or something of the sorts.

I don't think your RPM vs. KM/h has been derived properly thus it looks a little more laggy than it is... Also should go E85 ASAP, with the added exhaust gas produced, you'll get the turbo on noise quicker.. look at the result posted here:

http://www.sau.com.au/forums/topic/55845-rb25-turbo-upgrade-all-dyno-results/page-53#entry7637416

It's all in at 4500rpm and makes a silly 365kW

[hypergear]

Is this right Stao, or am I reading it wrong?

Depending on the turbo is working with. That reading is out of an ATR45SAT model. Yes it have made a big difference with exhaust ventilation, its almost as driving with no exhaust at WOT.

On a Rb25det Neo motor the ATR45SAT's making 20psi by 4000RPM, check to see if VCT is active, preload the actuator by an extra 2mms and see if that makes any differences.

[kingtube69]

Thanks Stao, I'll give it a go - Car has RB25DET non neo not sure that they had VCT (maybe I'm wrong)

From the dyno and driving I find that it's on full boost around 4500RPM

[iruvyouskyrine]

You are incorrect. All R33 and R34 RB25's have VCT turbo or not.

[Dose Pipe Sutututu]

Thanks Stao, I'll give it a go - Car has RB25DET non neo not sure that they had VCT (maybe I'm wrong)

From the dyno and driving I find that it's on full boost around 4500RPM

a little naughty, but drop your cat and run the car dump/down pipe to atmosphere (as a test) and see if it comes on earlier.. chances are your exhaust system is restrictive.