Ahem...."Direct Ignition", not "Direct Injection". No need for the flamethrower; just be nice.

 

I'm still trying to get used to this noise. Small price to pay for great power. I still love my car.

 

Sorry it has taken me so long for an update....my wife took her '07 GS350 in about 2 weeks ago & they installed "direct injection insulators" from an LS. I never drive the car but she says it's about 25% quieter. I have the part#'s on the work sheet & will advise tomorrow.

 

12605-38010 cover sub assy
12606-38010 cover sub assy

 

Thanks for the info leonsup!
These parts are only $12.00 each so I will be ordering today.

 

What on earth is involved in installing these things?

 

Direct Ignition is not the same thing. Most Toyota products have had direct ignition for years. That means you do not have a distributor. Direct Injection has to do with fuel application. Direct Ignition has to do with the firing of the Spark Plugs at precise intervals and order.

 

Who's talking about direct ignition here?

 

Please let us know whats involved for the install.

 

Will do.
I didn't find a diagram or parts fiche on the site that I ordered from but thought for only $12.00 I would give it a shot.

 

The guy who was confused about the direct injection and had it quoted from the manual for the Honda S2000. He was referring about direct injection, when in fact he was talking about direct ignition. Read the other quotes, before making a comment. I was just trying to let the guy with the S2000 know that he was mistaken.

 

Thats the spirit

 

12605 and 12606 in the diagram. Just looks like a piece of plastic to me.

 

We just got out GS last week too. I just listened to the service tech telling me how normal it is too. FWIW, www.lexuspartsnow.com has these for $10.52 each. Just so I'm clear, we would need 2 of each of these, right? One per rail?

 

I thought the whole concept behind direct injection was to spray the gas directly under high pressure into the cylinder and not into the intake manifold as is done with previous types of fuel injection technologies.

The high cost around direct injection is due to the super rugged material and construction needed for the direct injector to withstand the combustion pressure within the cylinder.

maybe I misunderstood what I read but given that wouldnt there be 6 direct injectors on a 6cyl engine?

Straight from lexus website:

Direct Injection
By injecting gasoline directly into the combustion chamber, the direct injection system results in a more effective mixture of air and fuel. Not only does this boost overall power, but with the extra control over the air/fuel ratio, mileage is also significantly improved.



Also from Lexus:


All petrol engines rely on a mix of air and fuel. The difference with the Direct Injection V6 is that the petrol is injected directly into the cylinder after the air is compressed – most modern petrol engines inject the fuel before the air is compressed.

Direct Injection is a more advanced and efficient way to burn fuel because it allows the engine to operate at a higher compression ratio than a conventional fuel-injected engine. With conventional petrol engines, the compression ratio is restricted to prevent the fuel/air mix from exploding too early while it is being compressed. Direct Injection obviates this since only air is compressed in the cylinder. The mix ignites only when the fuel is injected, which happens at the precise moment when the engine is timed to fire.

The result is an engine that produces more power, uses less fuel and emits fewer harmful gases, especially when the car also uses the intelligent intake and exhaust valve timing control afforded by Dual VVT-i.