SR20 (DE, DET, etc.) Note: If you have a SR16VE or SR20VE, SR20VET -- skip the section below discussing the girdle unless you plan on adding the factory girdle to your engine.
There are a number of options for the SR20 engine but the very first thing you must determine is whether your engine has a narrow or wide block.
The narrow block was designed first and is used in a number of applications. If the vehicle you obtained the engine from has AWD then it is almost certain you have a narrow block -- the narrow block allows greater room for the transaxle.
Here are some pictures to help you determine what block you have; click on the pictures to make them larger:
Below are some oil pan pictures. Do not pay attention to the lower steel part and do not expect your pan to look exactly like any of the pans -- look at the upper alloy section that bolts to the engine block itself. You can see that the one on the right is visibly narrower than the one in the middle and left:
Now, in both the narrow or wide engines, if you have a girdle, it is possible to have a louvered, directional-screened, windage tray that bolts into the girdle. (This part replaces the factory louvered pan baffle in the same area.)
Both layers nestle within the existing main bearing girdle and attach to the existing mounting points for the factory louvered pan baffles. The layer closest to the rotating assembly has two scraper louvers for each of the first three piston bays. They are chisel edged with the second larger louvers being relief cut so that it follows the contour of the factory rods and counterweights (other rods can simply be adjusted for by grinding). The louvers can be bent down or up to get very close tolerance fits. The last piston bay has a single louver that is bolted to the scraper. It is made to be removable so that it can be more easily adjusted.
This part costs $159.95. Please specify if you want the full tray (4 bay full coverage) or three bay and partial fourth bay coverage. Both versions include the aluminum plate to modify the upper sump, if desired.
Here are some pictures:
The picture below shows the scraper and tray from the interior of the girdle.
From the top ...
There is an option with the girdle scraper (mentioned above)...
The flow of air in the fourth piston bay is highly obstructed by a cylindrical indentation in the stock sump. This indentation is designed to allow access to torque converter bolts. It is highly desirable to remove this inward facing bulge if you are running a manual transmission. This means you will have to take the sump into a welding shop that is experienced with working on automobile parts this large.
Example of a removed bulge:
If you decide to do this modification we supply you with a pre-cut piece of aluminum that will assist the shop.
Here are pictures of the full fourth bay set:
Full coverage of the 4th bay
Screening installed; fasteners included
The version above shows the screening without the relieved openings for a pickup tube -- this is for a dry sump setup or for those variations of the engine that have the pickup support strut attached to the side of the girdle rather than the interior. If you are unsure where your pickup strut mounts then simply order the version with the relieved opening as it will work in either case.
The next option for the SR20 engines is again for both the wide and narrow versions. This option is designed to work with the girdle scraper and tray or you can install it by itself. The design does vary based on whether you have a narrow or wide block, however.
It is possible to get a steel scraper ($79.95) or a Teflon bladed scraper ($209.95) alone. These scrapers are ideal for the VE versions of the motor which have a wide block and no girdle. The scraper mounts between the girdle and caps or simply on the caps in the VE type. There are fully and partially counterweighted versions as well as designs for knife-edged cranks and stroked cranks (92mm, for example).
Steel scraper for wide block (fully counterweighted crankshaft version shown)
Partially counterweighted VE version
Partially counterweighted Teflon bladed version for a narrow block with or without girdle
Above scraper with girdle shown
Numerous variations available, of course. If you have any questions about your application -- please ask.