Zafira B VXR

Zafira B VXR

The Zafira B VXR engine (Z20LEH) is a development of the Zafira A GSi Z20LET power unit. Rather than simply diving straight in with remaps, we stripped an engine down to component form to examine its internals and get a real feel for what has been done. One of the main differences is the block has been equipped with oil spray jets. These jets cool the pistons by spraying oil at the underside of the piston. These oil spray jets were added for manufacturer's durability reasons because the LEH engine produces 240PS as standard (where the LET engine only produced 200PS), and not because, contrary to internet myth, the factory Z20LEH engine runs lean. In fact the Z20LER engine used in Zafira B 2.0 Turbo SRi runs at the same target lambda value from the factory as the Z20LEH engine, and the Z20LER engine does not have under piston cooling.

The Z20LEH pistons themselves are high yield forged items with the skirts Teflon coated to reduce noise and wear. Gone are the Z20LET’s counter rotating balancer shafts. This sharpens response whilst helping the engine rev much more quickly. At the top end the inlet manifold is revised however this revision is across the whole of the MK5 engine range, the VXR though getting new larger injectors. The turbo charger is a hybrid item, equipped with a better A/R ratio and stronger bearings. The manifold it has been built into is cast in a higher yield of material making it less prone to cracking. This turbo unit has been available for a while now from Vauxhall and we have already used many times on the Zafira A, Astra G and the VX220 with good results.

Once we had established the above we then under took mapping our first VXR. The results are very good, however we could not take the car any further than this on the standard intercooler. So extensive cooling modifications were investigated and developed for the next level of power, to ensure the longevity of the engine and surrounding components.

Please Note: Plugs are listed individually.The Best Plugs to use for 1.6 Turbo (Z16LEx/A16LEx/B16LER..
£9.00
Ex Tax: £7.50
Genuine OE Vauxhall/Opel Valve Stem Oil Seal.Vauxhall/Opel Part Number: 90410741For the Z20LEx famil..
£1.50
Ex Tax: £1.25
Shim for M32 Late Type End Case.To ensure correct shimming of the gearbox when fitting the later end..
£2.40
Ex Tax: £2.00
Uprated Exhaust Mount manufactured from a high temperature polyurethane material in red with a Shore..
£10.80
Ex Tax: £9.00
Laser Iridium NGK manufactured Spark Plugs for 2.0 Turbo A20NFT[LHU] A..
£14.40
Ex Tax: £12.00
NGK BKR7EIX Iridium Spark Plugs. Offer an enhanced spark over the standard items, and are 'cooler..
£9.00
Ex Tax: £7.50
VX220 Astra Vectra Z22SE Genuine Vauxhall Opel Oil Pump assembly, Part Number 93166701Fits:VX220&nbs..
£240.00
Ex Tax: £200.00
Genuine Vauxhall/Opel Corsa E Drop Link ( Damper to Anti Roll Bar)For ALL Corsa E Models Suppli..
£24.00
Ex Tax: £20.00
Gates Cambelt Kit for Z20LET engines. This kit contains a cambelt, pullies, & water pump wi..
£161.40
Ex Tax: £134.50
Genuine GM Big End Bearing Kit, Contains standard size bearing for 4 cond rods. Fits:  &nb..
£38.40
Ex Tax: £32.00
Genuine GM Main Bearing Kit that includes 5 Standard size bearings one of which is the guide/ thrust..
£43.80
Ex Tax: £36.50
10x Genuine GM Cylinder Head Bolts.Fits Models Astra J GTC VXR A2.0NFT (LHU) Astra J GTC V..
£20.88
Ex Tax: £17.40