414hp and 378ftlbs from my 2.7 turbo setup - At the wheels.

[Pork Chops]

Subscribed

[skinnerd]

Can we get a video of the engine running?

[TopTuning]

Building a 3.0 9 bolt engine now, and switching to a 718 S VGT turbo which MoTec will control.

should be interesting! If I can make the same power with 600-1000rpm faster spool it will be amazing.

I'm making support parts for these amazing turbos, and may even make a stand alone controller for the VGT.

Big updates will be coming later this year

[75 911s]

did the 2.7 go kablooey? but seriously, interesting work and looking forward to the updates

[TopTuning]

Originally Posted by 75 911s

did the 2.7 go kablooey? but seriously, interesting work and looking forward to the updates

Nope, I needed to get a 9 bolt to complete my clutch / flywheel setup for the NA 996 / 997 6 speed swap kits. So it's a lovely business expense to upgrade to the later engine

I'll be rebuilding / restoring the 2.7 and probably sell it with my full MoTec NA ITB package, or use it in my other 911 chassis (1980 Carrera) Was thinking about building a super lightweight NA car, so the mag block is an advantage there.

[Rosco_NZ]

Wow! What do you make of this Henry Schmidt?

[unclebilly]

Awesome build. It will be very interesting to see how the mag case and stud threads survive this.

I was heavily criticized for building my 2.7 in my (then) track car with a stock 2.7 bottom end by a factory trained Porsche tech. 15 years later still going strong.

[Coultl]

So awesome of you to share the timing table and other details! I'm building a 3.2 turbo and this is amazing info.

Two questions:
- What is your compression ratio? Stock?
- Are you running twin plug or single?

Thank you!

[TopTuning]

Originally Posted by unclebilly

Awesome build. It will be very interesting to see how the mag case and stud threads survive this.

I was heavily criticized for building my 2.7 in my (then) track car with a stock 2.7 bottom end by a factory trained Porsche tech. 15 years later still going strong.

The engine seems to be still in great shape. I'll tear it down this winter. I've moved on from it for my 3.0, 9 bolt crank engine.

Originally Posted by Coultl

So awesome of you to share the timing table and other details! I'm building a 3.2 turbo and this is amazing info.

Two questions:
- What is your compression ratio? Stock?
- Are you running twin plug or single?

Thank you!

Stock compression ratio. (probably. never had the engine apart)

Single plug - There doesn't seem to be a significant advantage to run twin plug with coil on plug ignition. I've messed with this on the dyno, where I can turn the lower coils off just in the software. Basically no difference. Might help with a really high power turbo engine running e85 or e98 fuels?

[ant7]

Very impressive, and informative for those contemplating going down this road in the future, I suspect many here will be grateful to you for sharing your knowledge and experience on this, awesome!
Ant.

[mikedsilva]

Originally Posted by TopTuning

The engine seems to be still in great shape. I'll tear it down this winter. I've moved on from it for my 3.0, 9 bolt crank engine.





Stock compression ratio. (probably. never had the engine apart)

Single plug - There doesn't seem to be a significant advantage to run twin plug with coil on plug ignition. I've messed with this on the dyno, where I can turn the lower coils off just in the software. Basically no difference. Might help with a really high power turbo engine running e85 or e98 fuels?

Interesting on the single plug vs twin. Most folks seem to insist twin plug is mandatory but I'm also considering staying single plug when I rebuild my 3.0 to 3.5 turbo..

[PeteKz]

Yes, great info on the single vs. dual plug power. When Henry finishes his special project engine, with the welded peanut-shaped twin plug combustion chambers, I hope he will do the same.

[scarceller]

Only needed 22 deg ignition at 100KPA above 3000RPM? That made best power? I would have expected more timing would be needed but maybe the 2.7 small piston really helps here.

Nice work!

Originally Posted by TopTuning

91 ignition table

[scarceller]

As the bore size increases twin plug may help more.
The small bore size of the 2.7 may be why twin plug has less benefit?
Also under boost flame front speed increases, densely packed air/fuel will propagate flame front much quicker.

A bore size > 100mm will likely benefit from twin plugs.

Originally Posted by mikedsilva

Interesting on the single plug vs twin. Most folks seem to insist twin plug is mandatory but I'm also considering staying single plug when I rebuild my 3.0 to 3.5 turbo..

[TopTuning]

Originally Posted by scarceller

Only needed 22 deg ignition at 100KPA above 3000RPM? That made best power? I would have expected more timing would be needed but maybe the 2.7 small piston really helps here.

Nice work!

The best ignition timing isn't always what makes the best power. There might be a small advantage with another few degrees, but a much smaller safety range to knock threshold, much higher EGTs etc.

I usually shoot for 90-95% of available power with a safety margin that's double what it would be at 100% power.

Unless you are running EGT and O2 sensors on every cylinder, with individual cylinder corrections, this a much better point of tune. BTW - I have done this on a few engines! Flat six air cooled engines seem to need a bit of extra fuel and a bit less timing on cylinders 2 and 5, which makes perfect sense.