Edelbrock E-Force for LLT

[scrming]

Originally Posted by GretchenGotGrowl

Exactly. Only thing is we run higher CR than you guys do. Other than that, very similar design.

Trying to find that dang magazine article... you know the GM High Tech Performance one... that was a good write up on the LLT....

And yeah, the higher CR... which is why I said "sensible" boost!

found the article:

http://www.gmhightechperformance.com...v6_engine.html

[Turbo99]

Aluminum-intensive construction extends to the pistons, which are manufactured as cast aluminum polymer coated oil cooled pistons, with a fully floating wristpin, and these pistons are considerably lighter than conventional pistons. Less weight means less reciprocating mass in the engine, which in turn means less inertia and greater operating efficiency. Moreover, the V-6 VVT pistons are crafted with a number of features that enhance durability and reduce noise and harshness, including a high-tech polymer coating and floating wrist pins. The V-6 VVT engine family was developed with pressure-actuated oil squirters in all applications. Three jet assemblies in the block hold a pair of oil-squirting nozzles that drench the underside of each piston and the surrounding cylinder wall with an extra layer of cooling, friction-reducing oil. The jets reduce piston temperature, which in turn allows the engine to produce more power without reducing long-term durability. The extra layer of oil on the cylinder walls and wristpin further dampens noise emanating from the pistons.


I think the bold will be your down fall. Cast will fail on an extended run of boost. Maybe not the first time but it will kill the ring landings.

[GretchenGotGrowl]

Originally Posted by Turbo99

Aluminum-intensive construction extends to the pistons, which are manufactured as cast aluminum polymer coated oil cooled pistons, with a fully floating wristpin, and these pistons are considerably lighter than conventional pistons. Less weight means less reciprocating mass in the engine, which in turn means less inertia and greater operating efficiency. Moreover, the V-6 VVT pistons are crafted with a number of features that enhance durability and reduce noise and harshness, including a high-tech polymer coating and floating wrist pins. The V-6 VVT engine family was developed with pressure-actuated oil squirters in all applications. Three jet assemblies in the block hold a pair of oil-squirting nozzles that drench the underside of each piston and the surrounding cylinder wall with an extra layer of cooling, friction-reducing oil. The jets reduce piston temperature, which in turn allows the engine to produce more power without reducing long-term durability. The extra layer of oil on the cylinder walls and wristpin further dampens noise emanating from the pistons.


I think the bold will be your down fall. Cast will fail on an extended run of boost. Maybe not the first time but it will kill the ring landings.

Agreed. We are still waiting on forged pistons. Evidently they are not easy to make for a DI motor. We also have to worry about the crank. While it is forged, it has a very small diameter. We are going to need to go with some stronger material if we continue to up the power.

[scrming]

Originally Posted by Turbo99

Aluminum-intensive construction extends to the pistons, which are manufactured as cast aluminum polymer coated oil cooled pistons, with a fully floating wristpin, and these pistons are considerably lighter than conventional pistons. Less weight means less reciprocating mass in the engine, which in turn means less inertia and greater operating efficiency. Moreover, the V-6 VVT pistons are crafted with a number of features that enhance durability and reduce noise and harshness, including a high-tech polymer coating and floating wrist pins. The V-6 VVT engine family was developed with pressure-actuated oil squirters in all applications. Three jet assemblies in the block hold a pair of oil-squirting nozzles that drench the underside of each piston and the surrounding cylinder wall with an extra layer of cooling, friction-reducing oil. The jets reduce piston temperature, which in turn allows the engine to produce more power without reducing long-term durability. The extra layer of oil on the cylinder walls and wristpin further dampens noise emanating from the pistons.


I think the bold will be your down fall. Cast will fail on an extended run of boost. Maybe not the first time but it will kill the ring landings.

Another point the LLT has in common with the EcoBoost... The EcoBoost has cast piston!

"High-temperature cast aluminum alloy with lowfriction coated skirts, lowtension rings with direct injection bowl"

Yes, the EB has a lower CR (10.0:1)... but again that's why i said SENSIBLE boost!

[scrming]

Originally Posted by GretchenGotGrowl

Agreed. We are still waiting on forged pistons. Evidently they are not easy to make for a DI motor. We also have to worry about the crank. While it is forged, it has a very small diameter. We are going to need to go with some stronger material if we continue to up the power.

Livernois is now offering forged piston for the EB 3.5... However seriously labor intensive to install! Probably a couple thousand when all is said and done!

Forged on the left, stock cast on the right:

[Amarr014]

twin screw system should be a reality in the future

[lscamaro]

Hey sleez did you ever meet with the company who might be willing to create this? Can never have too many options

[blackTT600]

Hey Gretchen, Scrming, & Turbo99 my buddy is a GM ACEP graduate, a GM mechanic, and is in school for automotive, and mechanical engineering. Anyways he said that the forged pistons available on the market for some of the Ecotec family may work. Someone who knows a little more want to chime in?

[Amarr014]

a top-mount twin screw supercharger?

Originally Posted by lscamaro

Hey sleez did you ever meet with the company who might be willing to create this? Can never have too many options

[Sleez]

we have had a few telecons, and are going to meet up soon after some initial measurements are taken, we need to decide if there is enough room physically for the compressor he uses now, if not, we'll have to do some research to find a low enough profile compressor to work with the stock hoods.

otherwise an aftermarket hood would be required, and many people may not be up for that!?!?

i am going to do what i can to make this happen!!

i wish i had a bunch of cash to ease it along, but i will survive!!!

may have to sell a motorcycle or two, but hey!!

[gahammerle]

Originally Posted by Sleez

we have had a few telecons, and are going to meet up soon after some initial measurements are taken, we need to decide if there is enough room physically for the compressor he uses now, if not, we'll have to do some research to find a low enough profile compressor to work with the stock hoods.

otherwise an aftermarket hood would be required, and many people may not be up for that!?!?

Or go old school and just cut a hole in the stock hood.

[Amarr014]

Originally Posted by SC2150

May need the aftermarket hood!

We have the car commited and are ressurecting it shortley.

[Macrackie]

Mad max blower sticking thru the hood sounds great.

[Amarr014]

Originally Posted by Macrackie

Mad max blower sticking thru the hood sounds great.

seeing as im the doner car n that doesnt bother me... possibilities if it doesnt fit