Brian Hoss

Yup. Like some mad scientist at RHS sat around and laughed an evil laugh creating this monster.

The new LT1 heads flow a ridiculous amount of air. They also are part of the direct injection set up that also creates an awesome amount of HP.

RHS released at SEMA their new Pro Elite heads to retrofit an LT1 designed head to an LS motor. Will use an LT1 intake and the gnarly high pressure fuel pump, injectors and lines. Talked to the Aeromotive folks who are making an LT1 pump and fuel set up that should be out first quarter. Couple this with the new MSD Air Force intake and you've got yourself a nasty little set up.

The only thing I'm trying to wrap my head around is the tuning side, but I don't think the fuel map will be that big an issue in HP Tuners.

Easily the coolest thing I saw at this years show. Some images of the mentioned products...

big hammer

sweet

01ssreda4

iTrader: (96)

How does an old computer control direct injection? and how does the cam now drive the fuel pump in the old block with no provision? Great idea I reckon for the bigger ci motors?? Seems anything 6.0 and down wouldn't benefit from any larger flowing heads then what already come stock/Gen4 (which most claim are lackluster in low rpms).

Paul Bell

iTrader: (9)

It'd be so very much stuff to change & fabricate and cost involved to get it to work you might as get a LT1 crate engine.

The only way I see of simplifying this down to a reasonably "do-able" job is to just find a wrecked truck with the LT1 engine and pull out everything-engine, transmission, harness, fuel system.

ULTIMATEORANGESS

iTrader: (4)

im guessing like everything else this is in the beginning stages of something ground breaking.

i hope anyway.

Majestic9C1

iTrader: (19)

its probably easier achieved on the LS2 and LS3 engines which run on more sophisticated ECU's

01ssreda4

iTrader: (96)

But still, can they control direct injection???

Majestic9C1

iTrader: (19)

I am guessing there are more pieces to that puzzle

Kory 88Iroc Lt1

iTrader: (7)

in for info
Kory

"MAC"

iTrader: (1)

Subscribed definitely wanna hear about how it all works.

Brian Hoss

I'm thinking this most accurately describes the situation. Comp should have the cam to drive the fuel pump, but I didn't see if in their new products literature at the show. Its the tuning side of things that will be the issue that should bring it all together. Subscribed to Comp, RHS, Aeromotive's press releases. Should start getting them all early in the week now that the show is over. Playing the waiting game till PRI....

joecar

If you're thinking of running direct injection, then fueling will be different

( and IFR characteristics of DI injectors is way different than manifold mounted injectors )

I'm thinking you will need an ECM from an LT1.

Brian Hoss

Oddly enough, GM had a nice display on LT1 stuff also.....

MuhThugga

It probably doesn't and you'll most likely need to upgrade to a newer computer or even an aftermarket unit.

I imagine the high pressure fuel pump will be belt driven or *gasp* driven off the nose of the cam like an Optispark.
Unless you will need a Gen III block and the lobe to drive the fuel pump is put in place of the cam position groove and the pump is driven through that hole and you need to relocate the cam sensor to the timing cover.
But then the valves would be way too big for the Gen III bores.

I guess we'll find out.

Jontall

I see no-need for direct injection, because I don't need or want variable valve timing/active fuel management. It just adds complexity and more failure points and GM did it to comply with the new EPA requirements.

Paul Bell

iTrader: (9)

Exactly.

MuhThugga

Some people find it fascinating to retrofit the system to a previous generation of engine. With all of that added complexity, the LT1 does make more power across the board over the LS3. I guess the big question will be whether or not all of that extra power will carry over through a conversion kit.

But I do agree in that I like to keep things simple and not add complexity.

KCS

iTrader: (20)

Doesn't seem worth it to me. Seems like you would be better off just getting a Gen V engine.

farmington

iTrader: (14)

not sure if DI is required. I think that they are just using those big, beautiful ports for more airflow.

RoyO

I may have missed something but, is it actually going to be a LT1 head or just based on one?