270kw (360 hp) is really low for an 8374 and not using it for what it's for.

The Doctor is claiming 450kw (600hp) at the wheels. Which is would be awesome, and at the same time seems too good to be true which is why we are asking for so much supporting detail.

 

It would be really sad if the turbos are awesome, but due to the poor salesmanship of THE DOCTOR, nobody who can be said to be independent will ever try them.

 

well this thread is under Time Slips and Dyno
you posted your interpretation of the dyno figures and all the technical "advantages".
Any time slips available?

 

As mentioned, it was just a comparison at the same lowish boost for all - and I wouldn't get very caught up in DD figures either. If the full capability of the 8374 was exploited, you'd never be able to complete a green flag 1hr race, especially up there. Car reliability trumps everything really on track, with heat rejection and EGTs a problem, desire to minimise emap, then driveline life, etc, coming into the equation. The car used for the odd highway blat is an entirely different proposition and you'll often find street cars are more powerful.

 

have you had an efr8374 at the track? Sounds like you got enough experience....
provide some insight.. have you tried both? Or what have you tried?

 

I get excited every time this thread get bumped, it is always entertaining.

I wonder if there is just some kind of cultural difference going on with this guy? Everyone is saying post proof with multiple shops and multiple dynos, aka show us the data... and he keeps saying the data is out there call these people to get it for yourselves the specs i provide should make these sell...

The true irony in this is what if his turbos are really that much better?

 

We've had a 8374 sitting in a box for a bit over a year if that counts, lol, still an old tech single in use! Twins and uprated twins both sequential and non-sequential have been used, ditched and reinstated in the past - after multiple changes, clarifications and backtracking on competition rules.. Been associated with people who ran the original SP turbos, 20 odd years ago - until the original supply was exhausted or spirited out the back door of Mazda Au, ha. Have my doubts you'll get long life out of any high boost twins or the engine, the people who were experimenting with these had bulk resources and could buy Sasha several times over...and they gave it away.

There shouldn't be any doubt they're the twins that will put out the most power though.

With your location, I noticed rx72c(??) did a tuning trip to Cyprus in recent weeks for some GCG twins . There was another "highest twins powered world record rx7" attempt over there, eff me!!.....I think that didn't go to plan either.

 

It didnt go to plan either because i suppose the owner was not using the sasha SP twins? I dont know who rx72c is. But what was the outcome? I dont live in cyprus so i dont know. I do visit Cyprus once a year


i have learned one thing.. it doesnt matter what the dyno says. Trap speed is the real judge.
since you are not really giving me any insight of your experience, do i dare to ask sasha's trap speed when he went at the track?

 

Raceonly is rx72c on here. If you trawl through that facebook page for the last few weeks, should be a mention when they boosted those turbos up....and the result.

Sasha and the other previous amigo were promising times probably 10 years ago when they first tried to sell them. Don't really follow the hype intently, last I heard, blown diff off the line maybe a year or more ago when he tried his luck for the first time - heard zip since, but hardly my area of interest to know if he's tried again.

 

I in no way know this guy or even who he is, but as a fellow Aussie, i can confidently say its not a cultural thing.

 

https://cimg7.ibsrv.net/gimg/www.rx7...c64544848d.png
Mainline dyno doesn’t lie 400kw at the wheels from hitachi sp sequential twins .
https://cimg8.ibsrv.net/gimg/www.rx7...66fdbfbbf.jpeg
These are standard compressor covers like the ones BNR sells in his hi flow Garrett cores .
https://cimg0.ibsrv.net/gimg/www.rx7...8ef8d3ea5.jpeg
These are the Bathurst sp compressor covers one of the many components that makes the twins produce the flow it needs to make 400kw at wheels at 23.5psi , and there still got lot more in them .

 

Do you have anything that overlays the torque on that HP chart?

 

The torque for the above dyno chart at peak HP is 1,484.9 FtLbs.

This is beccause the chart clearly shows 537.2 HP at 1,900 RPM.

 

That's why I asked. I think you pointed out this issue on the very first page of this thread. Everything looks fine and believable except when you include RPM and Torque.

What is the RPM on the chart actually showing. Is that the RPM of the roller on the dyno or wheels? It doesn't look like engine RPM.

 

It's also encouraging if this is the car with the tiny SMIC intercooler that it can handle such high boost coming out of the twins without super high intake temps and produce such good power.

Does this have meth injection or race gas? 20+psi is pretty high boost on pump gas.

 

Well, the Mainline Dyno calculates HP based off of torque applied to the rollers and rpm of the rollers.

https://www.google.com/url?sa=t&sour...=1583875055374

So, you can make it show any HP you want by incorrectly synching engone RPM and roller RPM.

Someone with access to the software should be able to figure out pretty close to the correct HP (and torque) of the supplied charts by the RPM and HP on them and plausable engine RPM ranges/sequential switchover.

For how long the sequential switchover is on that chart engine RPMs were likely a much more limited window than one would first imagine (not a full 2,000 RPM to 8,000 RPM sweep).

Would be great to get some data from a user. Maybe we could try Ric Shaw?

 

Ok. We need someone to make a new option. How about sequential twin EFR 6758. 90lbs per min. Handles high boost efficiently. Dual ball bearing, and lightweight shaft and turbine wheel. Built in BOV, wastegates, and boost control solenoids.

 

sounds like a plan , now you just need to make it happen .

But for now Bathurst sp twins are king .

 

Sure they are. 532 whp at 1900 rpm. Must be unreal.

 

ha , what happen to posting BNRS turbos power graph , you say there the best ???

I’m still waiting ,maybe you need more than water meth, try a big shot of nitrous in those little tiny bnrs , Maybe you’ll come close to Bathurst sp twins 537hp at 1900rpm shaft hub rpm .

USD $$ very good
Bathurst sp twins brand new
made in Japan
$3900 USD

 

As I said before. I don't own BNR twins, there are plenty of dyno graphs that show believable results in this very forum section.

You are the one posting highly skewed looking dyno charts without RPM and Torq, and when someone does the math it's clear that the numbers are not real.

I'm not going to post a BNR dyno as I didn't make one myself. Again, I'm looking to purchase upgraded twins. I was hoping you'd post something believable because your claims show higher performance. But you don't have the data or professional behavior to justify the premium you are asking.

I'm not telling people to buy BnR and not yours. If you could give us confidence in your power claims then I would actually prefer to purchase yours. But I'm not paying a premium for power goals that will never happen.

 

how can you say they it will never happen when it’s already has , these claims of yours are not facts .

Your on the fence I see not a good place , do you think borgwarner/Garrett did testing on the turbo rotary engine themselves , it took someone to buy and Test and then the rest of them followed.

And turbo Suppiers are still improving there there products.

Have a go and you will see everyone converting to twins again .
the performance up 537hp and still more in them is crazy and response a killer ,u get the best all rounder simple bolt ons , street , drag and circuit .

only for $3900 usd .
you want regret , money back guarantee.

twins pass cooler kit oem fitment
$1500usd
Oem brand new hi flowed oem fitment injectors
primary 1150cc
secondary 1500cc

and also a full map with all setting for apexi ecu , just need to go over fuel map .
safe timing map developed for sp twins
should take advantages of strong USA dollar

 

Comparing your situation to both Warner or Garrett is miles apart.

The have produced better and better products for years,at scale. They provide technical data and compressor charts to educate the consumer. It's reasonable to believe that with their experience, R&D, and testing, that a new iteration will yield improvement. Which gives the initial consumers enough confidence to take the plunge.

You offer no real data and your horsepower claim has been questioned due to the torque and rpm discrepancy since the very first page of this years old thread. But you refuse to address it with updated data and trying to highlight the HP number saying buy it, buy it, without even responding to the issue.

Post a normal looking dyno chart, there are several examples in this section of the forum, that clearly show RPM, HP, Torque, AFR, and Boost level.

This is 2020, taking a video of a dyno tune as it's happening is not difficult.

If you can't do that simple thing, you can't expect people to pay you such a premium.

 

Bathurst sp twins now only $3700USD

 

I'll give you $2500 shipped.