Harey

I think the T67 is a fantastic turbo but needs an external wastegate and really should have an aftermarket exhaust manifold compared to the 3076 which does not need either so puts it really in the next category up.

Geeze you must have done a lot of searching cause thats probably the most popular thread topic on here! Basically a Hypergear turbo will bolt straight to your manifold and dump pipe. I assume you already have a metal intake pipe, if not you will need one on whatever turbo you choose. The SS1PU is looking like a great street turbo to have, and if you want more power then the ATR43G3. Then there is the GT3071/3076 options which are very common. They will need a different dump pipe as its different to the standard nissan 6 bolt. There are also the Kando turbos. Do you have enough fuel capacity to flow a larger turbo? I would be doing a lot of reading if I were you. On the first 1-2 pages there is a thread about Hypergear turbos, a thread about Kando turbos and at least 2 threads about Garrett turbos. Not to mention the rb25 dyno results thread which should answer all your questions.

BAHAHAHAHA LOVE IT!

You talking about my old intercooler Stao? Didnt know it was that bad? Anyway I changed to an ARC return flow when I changed to the SS1 turbo. So unfortunately cant directly see the difference, except Trent said after 15+ dyno runs the temps were excellent.

Bit of an oil noob but where could we see a list of all of the API SN oils?

Yeah true I just dont like the feeling of torque dropping off. Hmmm havent heard of that?? Any more details? We tried all the studs to reduce the size of the wastegate path to hopefully increase boost up top but couldnt do it. I think my intercooler could have been restrictive. Yeah talking about the PU high flow. Sorry your right Stao made 295rwkw on 18psi and 305rwkw on ~21psi.

See how my boost is dropping to 15.5psi. No matter what I did to raise the boost it would drop back to 15.5psi. So no point in increasing it for it then to drop off up top.

Nope, Stao made 305rwkw with the exact same turbo I had and was only running 18psi also.

Yup can see the improvement there. Also the hit of boost is slightly smoother so would give the tyres a bit more chance of holding on with the FNT. Interesting to see that he could only make similar ~280rwkw as well whereas on your car and others it has made 300rwkw+. Wonder what is/was holding them back.

Sounds awesome but this statement should mean an instant ban!

Ethanol fuels are fantastic for turbos that are maxxed out on 98. On my rb25 with hks gtrs size turbo so ~245rwkw on 98 fuel maxxed out, then I changed to the caltex eflex fuel and made 280rwkw with even more response! Ethanol fuels work very well on the smaller turbos that appear to be maxxed out on 98. Go for it!

i really dont think you need an expensive boost controller. As Rolls said do some research on wastegates and boost control. An expensive boost controller will not magically allow you to run any boost pressure you want. If you are getting the right boost pressure with your current boost controller on minimum then basically it isnt doing anything and you should simply remove it and run the hose directly to the wastegate. The only real advantage of expensive electronic boost controllers is that you can built boost more aggressively, have multiple boost settings (all above wastegate setting which you currently said is 0.9 bar) and sometimes they can help hold boost at high rpm. A turbotech boost tee has been proven time and time again to control boost very very well. I personally run without a boost controller and have excellent boost control just using the wastegate.

Thats cool too, its a great turbo. As long as you understand what sort of turbo it is then go for it. I just know from my own history that I was not aware what came along with the great top end power/torque.

I also disagree, the G3 compared to the SS1 makes it a completely different car. With the G3 I would have to prepare to give it some. When I was in the twistys I had to keep it on the boil so changing down gears and revving it hard while just trying to enjoy some nice roads. With the SS1, instead of being in 2nd gear revving really high I can be in 3rd with nice linear torque as I drive through the corners. But at the same time on the track you want the max revs so the G3 would be far better. The SS1 is seriously standard turbo response. It is always right there and then has a really nice mid range. To the other question yes 250kw does feel much faster to the std turbo 200kw. The largest I would go for a street car would be an SS1PU or 2835 Pro S (normally 260-280kw).

Yeah I have to agree with the ATR43G3 being a bad turbo for mostly a daily driven street car. It will be annoying as you will go to accelerate to change lanes etc and you will be waiting for boost for too long. Its completely different on a track car where you will keep the turbo on song as the car will always be above 4000rpm anyway.

Yeah I am running the SS1 but I could only make 245rwkw on 98 on 20psi dropping to 18psi. The exact same turbo on Tao's car made 265rwkw but a few more psi starting at 23psi. Then I put it on E85 and made 280rwkw with even better response, its a pretty dam good street setup but if you can make 260-280rwkw with the same response with an SS1PU then sounds good to me. Regarding intercoolers I upgraded my crappy intercooler to an ARC turnflow. It improved my response by 2-300rpm and Trent said the temps did not rise after 7+ runs and it is ready for some track work. On smaller engined turbo cars I think a responsive efficient intercooler is really important. Whereas larger engined turbo cars like XR6 turbos its not as important as an extra 1-200rpm of lag is not a big issue as long as the air is cool.

Just reading through the thread now, going from 280 to 300 was just due to tomei poncams. Doesnt mention changing the turbo exhaust housing. Although his first dyno is with the standard R34 GTT turbo and without touching the tune it made 219rwkw which I have never heard of before so maybe the dyno is a little happy compared with other ones we have seen.

Just a quick correction but Matt uses a 0.63 internal gate housing not 0.82. Yes it is very impressive. I would love to see it back to back without the poncams, I wonder how much they are adding??

I was running Motul turbolight 4100 and didnt notice anything weird the in the drained oil but I didnt do an oil analysis or anything. After reading some of these threads I freaked out and dropped $100 on a bottle of royal purple as it is confirmed to work with E85. Until another cheaper option is confirmed then I will move to that.

i remember reading on the xr6 turbo forums that the siemens injectors require some different tuning paramaters to most factory injectors. my memory says injector pulse width?? whatever it was, once the parameters are set correctly they idle very well.

Yup agreed, I would also like to see some more SS1PU results. I can only seem to get 10-20rwkw less than Stao's results for whatever reason so it would be good to see if people can match the ~280rwkw he made with awesome response.

Thats interesting about the octane limit. I know Stao was talking about putting an aftermarket manifold to see if that was the limit but 99% of his customers are using the standard manifold so not sure how much it would help sales. 320-330rwkw on 98 is about 360-370rwkw on E85 which is more than enough really! Agree about the interesting thread, it is definitely my favourite thread on this site.

550s will be fine on 98 but will struggle on E85.

Regarding the SS3, do you think you have a restriction around 320-330rwkw in your setup somewhere? As the SS2 made 320rwkw with a lot more response. It looks like the SS3 should go on to make more. Also what turbo does ABE run that is making 359rwkw on E85? Is that an SS2?

Hi Tao, wondering what the differences are between the SS1 and SS1PU? How much would it cost to make my SS1 into an SS1PU? Is the SS2 a completely different turbo?