Ls4???

[Steve91T]

My brother brought this to my attention.

LS4

5.3 L LS4 V8 in a 2006 Chevrolet Impala SS
LS4 can also refer to a 454 CID Chevrolet Big-Block engine of the 1970s
The LS4 is a 5,328 cc (5.328 L; 325.1 cu in) version of the Generation IV block. Though it has the same displacement as the Vortec 5300 LH6, it features an aluminium block instead of iron, and it uses the same cylinder head as the Generation III LS6 engine. The bellhousing bolt pattern differs from the rear wheel drive blocks.
This engine is adapted for transverse front-wheel drive applications. According to GM, "The crankshaft is shortened 13 mm – 3 mm at the flywheel end and 10 mm at the accessory drive end – to reduce the length of the engine compared to the 6.0L. All accessories are driven by a single serpentine belt to save space. The water pump is mounted remotely with an elongated pump manifold that connects it to the coolant passages. Revised oil pan baffles, or windage trays, are incorporated into the LS4 to ensure that the oil sump stays loaded during high-g cornering."[6] Active Fuel Management is also used. Output of this version is 303 hp (226 kW)/300 hp on LaCrosse Super and 323 lb·ft (438 N·m). The standalone engine weight of the LS4 is reported at 478 lb, exclusive of any accessory pumps.

Read more: Specifications for the LS4 454 Engine | eHow.com http://www.ehow.com/list_7432813_specifications-ls4-454-engine.html#ixzz1EMCT6ANuApplications:
2006–2009 Chevrolet Impala SS
2006–2007 Chevrolet Monte Carlo SS
2005–2008 Pontiac Grand Prix GXP
2008 Buick LaCrosse Super

[Kalstar]

I am using a 5.3 in my GTM. They can hold increadible hp/tq for very short $$

[Wayne Presley]

Were you thinking about this to the new FFR or the GTM?
My brother brought this to my attention.

LS4

5.3 L LS4 V8 in a 2006 Chevrolet Impala SS
LS4 can also refer to a 454 CID Chevrolet Big-Block engine of the 1970s
The LS4 is a 5,328 cc (5.328 L; 325.1 cu in) version of the Generation IV block. Though it has the same displacement as the Vortec 5300 LH6, it features an aluminium block instead of iron, and it uses the same cylinder head as the Generation III LS6 engine. The bellhousing bolt pattern differs from the rear wheel drive blocks.
This engine is adapted for transverse front-wheel drive applications. According to GM, "The crankshaft is shortened 13 mm – 3 mm at the flywheel end and 10 mm at the accessory drive end – to reduce the length of the engine compared to the 6.0L. All accessories are driven by a single serpentine belt to save space. The water pump is mounted remotely with an elongated pump manifold that connects it to the coolant passages. Revised oil pan baffles, or windage trays, are incorporated into the LS4 to ensure that the oil sump stays loaded during high-g cornering."[6] Active Fuel Management is also used. Output of this version is 303 hp (226 kW)/300 hp on LaCrosse Super and 323 lb·ft (438 N·m). The standalone engine weight of the LS4 is reported at 478 lb, exclusive of any accessory pumps.

Read more: Specifications for the LS4 454 Engine | eHow.com http://www.ehow.com/list_7432813_specifications-ls4-454-engine.html#ixzz1EMCT6ANuApplications:
2006–2009 Chevrolet Impala SS
2006–2007 Chevrolet Monte Carlo SS
2005–2008 Pontiac Grand Prix GXP
2008 Buick LaCrosse Super

[Steve91T]

For the new FFR. I don't know what the size or weight difference is though.

Steve

[Kasmodean]

Factory Five has already decided on using the Subaru as its donor vehicle. The H4 engine w/ transmission and the LS4 engine w/ transaxle with have radically different layout and motor mount locations. It is unlikely a engine bay designed for the H4 will fit the LS4 engine and transaxle without significant modification. But just as with the roadster, people will find a way to put what ever engine they want into the engine bay.

The subaru donor vehicle is more readily available throughout the world, and FFR wants this new kit to be a "World Car."

[thebeerbaron]

I may be completely off base here, but my quick impression is that none of these engines came with a manual transmission. I haven't looked into it very far, but apparently swapping in a manual is not exactly plug-and-play. The GTM uses a longitudinal layout instead of the transverse that would probably be needed in the new car (which is how the LS4 was mounted originally).

I'd guess that you could get similar levels of power out of a Subaru engine. The stock STi engine is supposed to be around 300hp.

I wonder how many people really have a concept of what 300hp in a 1800lb car would feel like.

[Steve91T]

I agree....I didn't know much about the LS4, just thought I'd throw it out there.

Steve

[pressley311]

The EJ257 also makes 300 crank HP , and can easily make around 370hp and 400+ Ib ft with a bell mouth DP, intake, one stage colder plugs and s good tune (with stock turbo injctors etc...)

[wjfawb0]

I'm not sure how many here have experience driving both large displacement engines and turbo charged four cylinders, but they are very different experiences to me. On the street I would take a roots/screw type supercharged car or larger displacement over a turbo charged car anyday. The 818 design is so light that it will probably already be a 'driver's car' with just a tuned up WRX drivetrain. I still prefer a nice linear throttle response on a car I'm going to put a lot of street miles on.

[Twinspool]

I'm not sure how many here have experience driving both large displacement engines and turbo charged four cylinders, but they are very different experiences to me. On the street I would take a roots/screw type supercharged car or larger displacement over a turbo charged car anyday. The 818 design is so light that it will probably already be a 'driver's car' with just a tuned up WRX drivetrain. I still prefer a nice linear throttle response on a car I'm going to put a lot of street miles on.

The generalization police are on their way. ;)

Anyone who's point of reference for a turbocharged powertrain is an Porsche 930, Dodge 2.2, a Lima Ford 2.3 or heaven help you a Starion/Conquest is in for a shock. Some of y'all make it sound like it's a miracle all these WRX/STI/EVO drivers are even able to drive on the street without the help of a roots blower to get moving with that peaky laggy power delivery.

4 valve heads, higher CR and better turbine/compressor matching make driving a turbo-4 from the last 15 years a vastly different thing than before.

I was wondering how long it would be before someone suggested a SBC. :confused:

[el_jefe]

I love me some LS motor, but it's not happening in the 818 without completely rebuilding the back half of the chassis. The LS4 also came with an auto, so unless that's your thing, it's really not gonna work.

Although I'll admit to laughing hysterically at the folks that compared an EJ to a LS motor in terms of horsepower. Just stop.

[Xusia]

Everyone has their favorite. It doesn't make anyone right or wrong...

[Smitty911]

The generalization police are on their way. ;)

Anyone who's point of reference for a turbocharged powertrain is an Porsche 930, Dodge 2.2, a Lima Ford 2.3 or heaven help you a Starion/Conquest is in for a shock. Some of y'all make it sound like it's a miracle all these WRX/STI/EVO drivers are even able to drive on the street without the help of a roots blower to get moving with that peaky laggy power delivery.

4 valve heads, higher CR and better turbine/compressor matching make driving a turbo-4 from the last 15 years a vastly different thing than before.

I was wondering how long it would be before someone suggested a SBC. :confused:

Hey, Easy now, what's wrong with a Omni GLH TURBO (torque Steer anyone?), Shelby Daytona 2.2 Intercooled Turbo, Porsche 924 Turbo, or Conquest? Although I did when $100 bucks in a Zero to 35mph race aginst a Conquest Turbo, I was in a Dodge Diplomat (318 carbed), HA.

No doubt the performance of todays turbos are easier to drive and modified (as evident from all the front end damaged Subarus), but some people don't like turbos. I'm one, I'll take just a nice linear torque powerband that doesn't Pffssttt at me between shifts. :D

Smitty

[wjfawb0]

The generalization police are on their way. ;)

Anyone who's point of reference for a turbocharged powertrain is an Porsche 930, Dodge 2.2, a Lima Ford 2.3 or heaven help you a Starion/Conquest is in for a shock. Some of y'all make it sound like it's a miracle all these WRX/STI/EVO drivers are even able to drive on the street without the help of a roots blower to get moving with that peaky laggy power delivery.

4 valve heads, higher CR and better turbine/compressor matching make driving a turbo-4 from the last 15 years a vastly different thing than before.

I was wondering how long it would be before someone suggested a SBC. :confused:

What's funny is I've never driven an 'old' turbo car. All my car experience comes from the two 2005 STIs I had, a 4.6L 2V GT Mustang, a 2003 Cobra Mustang, and a 94 NB Miata. I was slightly irritated by Jorge at P&L in Chicago when I took my first 05 STI to him in Chicago for a stage 2 dyno tune and he insisted on giving me a pep talk about not wrecking it on the first test drive. I had just sold my 03 Cobra a few months earlier, so I was accustom to not acting stupid on public roads. In his defense, he had a bad experience with another customer and didn't know me well. I just smiled and waited for him to finish. :) All that being said, I can't wait for Factory Five to start turning out 818 kits for customers to play with. :D

[jimgood]

So, Steve, you were thinking the LS4 because it can mate up to transverse transmissions? You should DO it! That would be a fun project.

[NewFatMike]

I may be completely off base here, but my quick impression is that none of these engines came with a manual transmission. I haven't looked into it very far, but apparently swapping in a manual is not exactly plug-and-play. The GTM uses a longitudinal layout instead of the transverse that would probably be needed in the new car (which is how the LS4 was mounted originally).

I'd guess that you could get similar levels of power out of a Subaru engine. The stock STi engine is supposed to be around 300hp.

I wonder how many people really have a concept of what 300hp in a 1800lb car would feel like.

I'm expecting it to be something like this:

The rumble. When you have one cigarette too many, or you're out on a run, and you have the rumble. Memories of what you ate for dinner last night are flooding back to your memory and you need to evacuate yourself now. NOW. You can try to ignore it, but sooner or later you're going to have to find a receptacle to empty yourself into.

The entire time you drive. Except pants-****ting in a good-riding-the-line-of-holy-****-one-wrong-sneeze-and-I-die-but-this-is-the-most-fun-I've-ever-had-in-a-car.

[leetfade]

There are highly efficient turbos like the new GTX2867r from Garrett that hits full spool ~3k RPMs and can put out 400ish WHP with a very linear curve. The Subarus have an odd mounting plate, though. Makes for less bolt-on upgrade turbo options for those not looking to fab up anything.

But, as has been said, it's all a matter of preference.

One question I have is about height clearance, though. Dependent on final bay lay-out, a traditional V style motor may not clear. I'm guessing they won't be making it that tight, however, if for nothing more than air circulation. I have to imagine that an H motor is smaller in overall height versus a V.

Having said that, I think I recall seeing the TMIC on the go-kart pics so that would negate that point. :P

[BipDBo]

The 818 would need substantial modification in its chassis and possibly the body to accomodate a V8, even in transverse orientation. You might be able to shoehorn in a 2.8 liter Hartley V8 might fit if you really have the time and the know-how. The 818 was designed aound the boxer 4. It just doesn't have the room for a V8. Fortunately, Factory Five already has a fix for this issue. It's called the GTM.

[Etos]

It could be doable. Don't forget FFR is planning a diesel 4cyl. So if it can fit a 4cyl transverse, it might have the room to fit a v8.