Lithium

That's pretty impressive, all things considered! The actual 7685 will make things rather interesting

What did you make with the "7675" again?

A mate is going to be trying a Gen2 GTX3076R with 1.01a/r hotside and a G-series turbo for comparisons sake, not 100% sure which but it seems like it could end up being a G30-770 with .83a/r hotside (most similar flow rating to the 1.01 GT30) on a built SR20VE. That should be a relatively interesting comparison.

Even though the more data etc I've seen it turns out there is a heap of misinfo on this (I'd been sucked in, too), it seems very much this isn't like that at all. The overspeed data is all to do with the compressor, nothing to do with the turbine - if people have spat turbines then they have REALLY overdone it, probably due to some other issue. Some cases I've seen have even turned out to be to do with oil starvation f**king the core and everything else being punished for it. I love the idea of the new G-series range but the fact that there are hopes that they will compete with the OG EFR range, and now there is a new series of EFRs which have really stepped it up there are some G-series which could possibly prove to be too little - too late. Look forward to seeing how they perform though as there are some really interesting units in the range, if they aren't a lot laggier than their wheel sizes would have you expect then they could mix things up a fair bit.

Only just spotted this, nice build and some cool data - been looking at the 61mm SX-E thinking that it would be a nice match to an RB30, doesn't look bad. Shame about the leak when it was tuned, it would obviously mess with the overlay a bit - both in terms of lag and power but clearly the EFR is a better turbo overall.

Double edged sword of course, if the boost reduces then the EMAP needs to drop even more to maintain the same IMAP/EMAP ratio. Anyway yeah, I agree overall with the sentiment and in this situation I'd just "feed it to it" in the midrange and bleed off boost up high and have a low revving torque monster.

Looks like the G30s are coming, now.... https://www.garrettmotion.com/racing-and-performance/performance-catalog/turbo/g-series-g30-770/

Awesome, nice work - that is REAL promising Pretty amazing you could get to 470kw at around 114,000rpm with a leak like that - not to mention the spool not sounding that bad considering. Also if it was able to do that with that kind of leak it makes it seem like the hotside will not be any real restriction, if all the air that's being moved actually gets into the engine then the hotside will have to work WAY less. You'll probably get significant gains everywhere, even psi for psi. This is going to be a beast, good luck for next week!

Any updates?

Nitto do a standard stroke full counter crank, may as well do that if you want to swing that way. They have 75.7mm as an option as well

Cool, good luck - that 700whp target should get royally smashed if you end up spinning the turbo as hard as you were with the leak, hopefully a spool improvement too

Doesn't look like the bigger ones are going to be exactly bargain prices https://www.ebay.com.au/itm/Turbo-Charger-Garrett-G30-900-0-61a-r-62mm-55mm-Reverse-V-Band-V-Band-/323866714212 https://www.ebay.com.au/itm/Turbo-Charger-Garrett-G35-1050-0-61a-r-68mm-62mm-Reverse-V-Band-V-Band-/323866713916

That's great news! Just think how many people with similar issues could have ended up just moving on and thinking that is how the setup is meant to perform without realising it could perform overall much better? It happens a lot, shows the worth of having good data and paying attention to what it's saying nice work finding the issue ! Knowing the issue actually makes the result so far pretty impressive, this is probably going to be a different beast next time it meets the Dyno - when is that likely to happen?

Actually not quite sure on your angle here. Maybe I need to be more drunk for this to make sense? ?

And I'm assuming that's with a reasonably sensible base pressure? It is definitely adding up that the turbo is starting to work quite hard, like what the wheel speed is indicating. There is a pressure source on the EFR compressor housing, at the very least I'd try and find out what pressure is being hit there and if you're seeing a suspicious pressure drop between there and the intake manifold. Just for sport I'll bet 25 internet points that there is a significant discrepancy there. What does the power curve look like?

The tricky thing with hot intake temps is with some of the really good intercoolers these days I've actually seen people "off the map" and still have reasonable intake temperatures, so you can't actually be sure that is the issue.... pre-intercooler temps will tell a clearer story there. I'm betting that exhaust manifold pressure is going up big-time, and it's part of why I asked about the boost control. At the moment it seems a lot like either the engine isn't converting the airflow into power well, or the airflow is being lost somewhere - like a boost leak or something (as is a recurring theme in the line of questions). This is one of those cases when an airflow meter is handy haha, but with the wheel speeds being mentioned it seems a lot like the turbo is working hard. I suppose there are two other options which could cause this kind of thing, if there is an intake restriction pre- or post- turbo - like if someone left a rag in the intercooler or something when things were being changed over.... that would mean you wouldn't see a leak, but it would boost the pressure ratio across the turbo HEAPS but you wouldn't see that pressure at the intake manifold. Temperature and/or pressure at the compressor outlet may help build a better picture. I'd be wary of pushing it much harder without getting to the bottom of what is going on, as it seems like the turbo speed is probably configured right it means a lot like something isn't performing correctly and it's costing power, probably spool, and could compromise reliability too.

Something really doesn't sound right, are you going to the 4port due to having issues holding boost? If you are maintaining 23psi through the run and your wheel speed is 114,000rpm then the turbo is moving a LOT of air, like over 90lb/min.... but you are only making 70-75lb/min power levels: What kind of ECU are you using?

That's good to know! That will be some very interesting testing! Particularly the 8474 versus 9180 stuff, as the 8474 actually appears to have the edge on flow - it'll really clear up how much of a choke point the 74mm and 80mm turbines may or may not be. Hope the setup has lots of data and all the supporting systems, needed... you could end up with a pretty serious performer from this, not to mention have the kind a data a LOT of people would love to know about

I would be surprised if anyone would now. If you have the version I am thinking of they will need an adapter to connect to it - not sure if they are even made anymore. There is rugged old software which needs to be used to tune it. From memory these might not even use IAT correction, cold start and acceleration enrichment are done with a single magic number which no one really knows what exactly represents, and really they are basic as hell. With the level of modifications you are talking about I am not surprised that people would just say no, especially with the temperature range you deal with in Sydney. Realistically if you are spending a bunch of money and the money you are spending is not fixing the weakest link in your setup then it's the kind of thing that would raise alarm bells for a tuner - knowing that more often than not if something goes wrong they're going to be the ones blamed. I'm not saying that as a wind up, just giving some heads up what and why the reasons you may struggle to find anyone and possibly give insight as to why maybe you should take on board the fact you are having issues finding someone to tune it could be for your own good.

As comments above warned, it's not unusual for the stock BOV to leak.... trying the stock BOV wasn't necessarily going to rule it out. If anything, it could be argued that it proves that the other BOV may have been leaking as well if you didn't end up with worse turbine speed - as this is the reason people often blank off/replace the stock one. Fingers crossed it's either not an issue, or something else. Good luck with the rest of the tune!

Ahh. I would probably sooner run a blank on the EFR compressor housing than go back to the stock one if you have another BOV, I get the impression the stock ones are not great. Or this, if it's an option

Ffs watching it now - pretty sure this runs pump gas? Skyrocketing intake temps suggests that intercooler setup was way out of it's depth, so changing that alone would have justified a separate test... Drives you nuts when this kind of thing is done by someone trying to share data and doing it as an authority. If it makes significantly more and they conclude that it was because of the housing then a table flip is justified.

Random. Oh well fingers crossed it all goes relatively smoothly. Are these numbers on E85?

Again, verify that the turbine speed calculation is configured correctly - or that there are no boost leaks or anything. That rpm doesn't align with what it should be doing so it makes it seem like the calibration is wrong, or there is some other issue which will end up making performance fall short... though the power you are making at that low boost makes it seem like it's performing ok. The rpm would make a lot more sense if your ECU was configured for 12-blades when it SHOULD be set for 14... 700awhp should be well within it's capabilities

Between the big housing and big cams that extra lag isn't too surprising but the turbine speed is a little unexpected. What kind of Dyno is it being tuned in - and was this E85 or petrol? I have heard of people getting the blade count wrong (set to 12 instead of 14 blades), which would inflate the reported turbine speed. Looks like the 8474 is probably a 14-blade wheel so on the off chance your ECU is set to 12 blades you could actually be pushing 90000rpm or less. Either way cheers for the update and good luck with the rest of the tune, be keen to see a Dyno plot (with rpm) when it's done if you are able !