2002WRXSTi said:
OK what do you consider a High end standalone unit then
It really doesn't get better than a Motec.
I wanna see such a thing on pump gas. I had a S2000 and it will not do such a thing on pump gas period.
I will admit that I have no link to provide for this, as it was something I saw in real life, and not ont he internet, but you are welcome however to verify that an S2000 running a 6 psi turbo kit on it's stock compression makes more power than your C-Spec engine does. Go to any S2000 forum you want. Stock compression, pump gas, more power.
Obviously because you have the magic key to making all this power on pump gas while the manufactures can't.
The "magic key" is increased volumetric efficiency, instead of running a billion pounds of boost.
So every book and place including Gale Banks or Lingenfelter to name names you may understand do not increase the CR when they are building a boosted engine.
Depends on the engine. Lingenfelter has built many high compression boosted engines.
Oh I still don't see how thats a handicap you say? Why are they putting dished low CR pistons in and not domed or flat tops then?
Because of the limitations of the application that force them to run extremely high boost pressure, bringing on the handicap of decreased adiabatic efficiency.
Fine you know of people that are making lot of HP with 10 to 1 but they are tuned to the edge and a bad tank of gas will detonate the engine and then what are ya gonna do.
A bad tank of gas will destroy a high pressure engine far faster than a low pressure engine, unless the compression is at like 11.0:1 or above.
Oh claim but low compression is old school my super computer ECU can change physics. That simple, if you are building anything for hi boost you go lower compression period.
Yeah, if you actually need high boost to make big power.
All you keep talking about is this stock and that with boost. That and a diesel uses glow plugs to make for easier starting the compression is directly related to the engines efficiency but I will not get into that debate here.
Any diesel would get along just fine with 15:1-18:1 compression. That 25:1 stuff is to make sure the sucker can start. Glow plugs have been around for a while, and diesels still have a hard time starting in the freezing cold. Diesels don't need compression lowered when running boost for ANY reason related to combustion. It is because of engine durability. The military had diesels that ran 50:1 compression off of used motor oil and other raw products, and the only drawback they encountered was that they needed an engine just as big as the engine just to start it because of the insane compression.
You think you have built more boosted engines than me. Probably but where I worked and I wont bring there name onto a board ever, has built more super stock engines than you and are among the top 3 builders in the world. They have been contacted by the auto manufacture to help design the cam profiles. One side that left is running Pro Stock and the other is running Pro 5.0. They are both certified on High End Standalones and all will say High Compression is a handicap with a boosted applications. This is a link to what you CR will be with Boost
KB Performance Pistons and it comes out that a 10 to 1 CR with 10psi boost will come out to 16.8 compression ratio depending on cam specifics. Sure you can do this on pump gas but why would anyone want to? A tank of bad gas and broken ring land, push out a head gasket to name a few. It is a Handicap running on the ragged edge for a street engine!
How funny. Never encountered any of these problems.
I have people saying the same thing I am arguing with you because I run 31.5psi on pump gas but I do not hit that boost very often. Do to my 8 to 1 compression it lets it live on pump gas. These pistons are forged and were put in not because the Manufacture uses a bad tune but because the lower the CR the more fuel and air can be put into the cylinder therefore more power. A higher CR is great for naturally aspirated engines but you cannot get as much air and fuel into the cylinder. Handicap!! This is how I can say it's a handicap. How can you say it is not??
The factory put in a tiny little turbo, and a pathetic intercooling system. Don't even tell me that any SUbaru has ever rolled off the assembly line with an intercooling system that was anything but poor. That is why your engine has low compression.
RUF and Porsche don't seem to have a problem making loads of turbo power on 9.4:1. Wonder what the difference might be?
