Turbo manifold

[EAGLE5]

Originally Posted by King Tut

Appearances can be deceiving and their kit definitely doesn't spool as well as the AVO or a smaller T3 based turbo kit.

How do you know? Not disagreeing. It's just that their dynos show a fantastic spool, much better than everyone else as far as I can tell.

Myself, I'm waiting for CARB approval of the Innovate, preferably with an intercooler, though we'll see if maybe e85 will be almost as good without as it is with.

[King Tut]

Originally Posted by jsimon7777

How do you know? Not disagreeing. It's just that their dynos show a fantastic spool, much better than everyone else as far as I can tell.

How are you defining spool? If you think a GT30 turbo and the OEM exhuast manifold are the quickest to spool, that is fine, but I know that is not the case. A 5th gear dyno plot on a load control dyno does not tell the entire story.

[jamesm]

Originally Posted by jsimon7777

How do you know? Not disagreeing. It's just that their dynos show a fantastic spool, much better than everyone else as far as I can tell.

Myself, I'm waiting for CARB approval of the Innovate, preferably with an intercooler, though we'll see if maybe e85 will be almost as good without as it is with.

it's simply impossible for a gt30r to spool faster than the little turbo that comes with the avo kit. if you were to dyno an avo kit under the same conditions it would spool much, much faster.

load dynos can make anything look like it spools quick. in the real world it's no quite the same.

[EAGLE5]

I guess we'll need to see dynos from people who purchase the kit. OEMs can get turbos spinning meaningful boost at 1200rpm in the real world, turbos that spin up to 300HP or more. I don't think there's any magic. It's impossible to compare apples to apples without kits in the hands of people.

[AVOturboworld]

OEM turbo's can reach peak boost by 2400rpm on a 2.0-liter, yes. But in that particular case, it was a 2.0-liter EJ series Subaru Legacy with a tiny, and I mean *tiny*, twinscroll turbocharger with the entire system gone through with a billion dollar budget to get it to perform like that. It also ran out of steam around 5800rpm, and the 300hp was crank, not wheel. No current car manufacturer would be putting a GT30r size turbo on a 2.0-liter motor, and if they did, they wouldn't be expecting to get full boost by 2500-3000rpm.

[crook]

It's back to the same old "horses for courses" line.
But can't see a 30r spooling faster than a 25/28 or smaller... It's all relevant

[ptuning]

Looks like we're late to join in on the conversation, but here's some info to consider:

I know we've mentioned this before, but the RPM's that a turbo can build full boost at alone doesn't tell the whole story. How efficient the complete turbo set-up is overall will determine how much power and torque the engine will make throughout the power band.

Below is the popular Greddy T518Z-10cm2 turbo system compared to our much larger PTUNING GT3076R turbo system w/0.82 AR turbine housing too. Both were installed and tuned on a 2.2L AP2 S2000 running 93 pump gas. The Greddy kit was running WMI too. As you can see, there is a bit more boost during spoolup, but we make way more torque off idle to full boost. Above and beyond that our MUCH larger turbo allows us to run more boost efficiently, thereby making 422whp all day everyday on 93 pump gas. We have S2000's running the GTX3076R making upwards of 460whp on pump gas on our Dyno Dynamics Dyno. The only reason we didn't run more boost with the Greddy system is that it would have likely made no more power, even if we yanked off the WG boost line. The turbo is too small in our opinion. BTW, this is in no way knocking Greddy, it's just a case of IF you can make a larger turbo work with your turbo system, then go for it. There are many benefits to doing so. Running a tiny turbo just for "quick spoolup" is sometimes overrated.

Again, there are many things to consider when choosing a turbo design. We opted for a low mount again with the FR-S "because downpipe". Our S2000 system pictured below likely has THE best overall powerband of any system on the market. We've tuned a lot of different turbo systems too. Part of why we produce a wide powerband is due to the near arrow-straight downpipe and very nearly equal length manifold.

Also, mounting the turbo down low and further back drastically shortens the distance between the turbine outlet and the tailpipe, this makes for a very responsive turbo (given the large size) that also makes great power on the top end too.

We're pretty confident that if we were to ever try a GT28 sized turbo or smaller, we'll have the same, if not better boost curve than a lot of other systems.