The Bullet SR20 to suit Nissan SR20 applications has been proven in World Time Attack applications including 2016 & 2017 winner The MCA Hammerhead.
The Bullet SR20 to suit Nissan SR20 applications has been proven in World Time Attack applications including 2016 winner The MCA Hammerhead. In dry-deck drag racing applications it has been proven at outputs exceeding 1800hp.
This product has vastly improved block rigidity and improved deck thickness over the stock unit. Combined with increased head stud diameter this product delivers exceptional head sealing qualities. Distortion of cylinder bores and crank tunnel is dramatically reduced through design improvements and a Bullet 4 bolt main cap system. The standard cast alloy unit suffers from high distortion which is eliminated with the Bullet product.
The Bullet SR20 comes in 3 models, Wet or Dry Deck (open or closed deck) with water jackets & a Solid Drag only version.
So Street-Strip-Circuit-Bullet has you covered!
| Name of product | SR20 Billet Block (Nissan SR20 rear wheel drive applications) |
|---|---|
| Actual Weight | 34kg |
| Block Material | 6061 aircraft grade billet aluminium. |
| Design improvements | 4 bolt mains, increased block deck and cylinder wall thickness. Performance sleeves fitted |
| Studs included | ARP 8740 1/2” Head and 7/16” Main studs. |
| Modifications required to fit | Remote Oil Filter, external oil pump & Electric Water pump |
| Modifications to head required | Drill out head stud holes to 14mm |
| HP rating | 1700* |
| Significant benefits | Significantly increased rigidity and durability. May be bored to 90mm |
| Finish | Raw machined |
| Options available | Bullet Fire Ring Head Sealing System Wet or Dry Deck available |
| Stock block weight in comparison | 31kg |
The optional Bullet Fire Ring head sealing system uses a metallic gasket with grooved brass rings for the cylinders that provide exceptional head sealing under ultra high loads.
Increased deck thickness increases rigidity and stability for better head gasket sealing.
Bullet supply premium studs and block plugs with all billet blocks.
Our blocks are machined from 6061 aircraft-grade billet aluminium, so they are much lighter than cast iron alternatives. Typical weight savings are more than 20kg.
Our unique design incorporates siamese bores, dry sleeves and a one-piece cradle resulting in maximum rigidity. Cylinders stay round and piston rings seal better under high load resulting in more power.
Four bolt, billet one piece main cradle improves bottom and rigidity to reduce main tunnel deflection under extreme load. The cradle is made from the same material to ensure equal expansion rates and maintain a round bearing housing at different temperatures.
Bullet’s registered designs are developed to identify and eliminte structural weaknesses in OEM blocks. They are built to exceptionally precise tolerances for exceptional results.
Cooling system design improvements and efficient fluid paths are a significant feature of the Bullet block.
