High Feature?

[ericjon262]

What do we know about the new high feature motors?

I'd like to compile some info on these motors, as I would like to use on in my next motor swap, from what I have seen they look more compact than the 3.4 TDC.

-262


The Known tricky parts:
Mounts (always a bit tricky to get custom mounts right)
Engine management
wiring harness
Throttle actuation (DBW)

Transmission options:

Saab F40 6 speed (only transverse manual available...) (thanks Caffeine)

Direct injection:

LF1, LFW, alfa 3.2, LLT, LCS, LFX.

Integrated exhaust manifolds:

LFX

[caffeine]

If you want a manual transaxle I think the only one that bolts up is an F40 out of a Saab

[ericjon262]

Thanks!

[robertisaar]

http://en.wikipedia.org/wiki/GM_High_Feature_engine

that answers a bit of it for you:

direct injection = LF1, LFW, alfa 3.2, LLT, LCS, LFX.

[ericjon262]

I just have trust issues with wikipeidia...



Note the highlighted edits I made to prove a point on fiero.nl...

[caffeine]

The local dyno shop says the direct injection PCMs are almost untunable. They did have a stock 5th gen Camaro V6 dyno at around 260 to the wheels with an auto though.

[TurboGTU]

I can see it now, Cummins ecm swap

[ericjon262]

I can see it now, Cummins ecm swap

too bad there's no spark control...

[TurboGTU]

Nothing MSD or home brewed stand alone ignition can't handle. The Cummins ecm was more of a joke. But if its injectors are the same as diesel common rail like the late Cummins, duramax, Isuzu, then its not far fetched. But one thing to remember, this type of injector can fail catastrophic. Any dust particles or rust can ruin a injector and their not cheap. They can go by missifing or having high return where you can't even start it. Then there's when they stick open and inject all the time and wash off a cylinder or hydro lock. I work on diesels like those all day.
I'd stick with port injection but if money is not an issue the by all means.

[ericjon262]

bringing this back, anyone know of performance parts for these?

[Will'sFiero]

The transmission is from the '09+ Saab 9-3 with 2.8 turbo.

Trifecta claims to be able to set up a stock computer for swap use.

Rcheee is using DBW V8's in Fieros, so you know the pedal sensor can't be hard.

It is much more compact and lighter than the TDC.

Obviously custom headers aren't going to work well on the LFX.

[ericjon262]

The transmission is from the '09+ Saab 9-3 with 2.8 turbo.

Trifecta claims to be able to set up a stock computer for swap use.

Rcheee is using DBW V8's in Fieros, so you know the pedal sensor can't be hard.

It is much more compact and lighter than the TDC.

Obviously custom headers aren't going to work well on the LFX.

do you have weight specs on the HF engines? I'm curious as to just how heavy they are.

[caffeine]

Probably slightly heavier than a 3500. I can't imagine the VCT system adding more than 15-20 lbs.

[Will'sFiero]

do you have weight specs on the HF engines? I'm curious as to just how heavy they are.

They're pretty darn light.
I've weighed a Northstar long block at 310 lbs... I'd expect a HF engine to be lighter than that.

[timg]

Tuning has been added to HPTuners for these, but I would probably go with an aftermarket ECM instead if you use a manual transmission.

Tim