About The EJ Engines
EJ engines in general have some basic advantages:- good crank mechanism geometry, contributes to high rev capability.
- good heat transfer characteristics.
- light total weight.
Nevertheless those engines where designed to handle a certain output value. Increasing it by tens or hundreds percents will require a few issues to be dealt with:
Internal components - in most of our versions we use our designed piston ,conrods and cranks, taking care of all engine characteristics, such as:
Compression ratios ,fuel type , cylinder diameter, etc. These and other parameters determine the amount of force applied on the cylinder head. The critical point in the thermodynamic cycle is the one between the heat investment and expansion process which called the work stroke. Most of the Subaru standard engines operate with 8:1 C.R and 1bar to 1.3 bar gauge pressure.
So force occurs due to chamber pressure at that critical point is 32000N to 39000N. Standard head bolts and standard multy layer steel gasket can handle this. Taking the standard platform out of its boundaries: higher boost, higher C.R, bigger cylinder bore, higher chamber temperature will probably result in a head gasket failure. ITS developed a chamber seal for high pressure.
- machined steel ring
- c.n.c milling to block deck
- cooper sheet metal
- o-rings for water and oil galleries
- M14 head studs
The ITS chamber seal can handle pressure, producing more than 55000N. The chamber seal is available for 92.5mm bore only, and can be applied on all EJ20 closed deck versions.
