Since the bottom end is complete and the cylinder head is ready to go Javier said he will pretune the car so it will only take one dyno run on the final test day to make the power he predicted. One key part that helps out the cylinder head porting is the custom intake manifold that is specifically designed to increase the CFM out of this cylinder head.
| R&D DYNO |
| CYLINDER HEAD SPECS |
| Cylinder head model | GSR |
| Valve Manufacturer | Super Tech |
| Valve Material | Stainless steel & black nitrided coating |
| Intake Valve size | 1mm over stock |
| Exhaust Valve size | 1mm over stock |
| Valve Spring Manufacturer | Super Tech |
| Retainer Manufacturer | Super Tech |
| Cam Manufacturer | Crower Cams & Equipment |
| Sprocket Manufacturer | Crower Cams & Equipment |
| Intake port modifications | CNC ported with modification |
| on the guides and upper ports |
| Intake Port finish | CNC cut finish |
| Exhaust port modification | CNC ported with guides modified and ports polished |
| Exhaust Port finish | CNC cut finish |
| Combustion chamber modifications | New seats for the bigger valves |
| Combustion chamber finish | Polished |
| Number of angles on valve job | 3 angle |
R&D DynoWhen we last left R&D we were surprised to find that the big boss, Darren San Angelo, wanted to stick with the smallest stroke, the 87.2mm, that comes standard on the B18C. All the builders seem to agree that the engine will produce a good peak horsepower level but that the trick is to make some good mid-range power. According to R&D, it will be the CNC cylinder head and cam selections that will make the mid-range come alive.
The B18C cylinder head will be ported and loaded with a Super Tech lineup starting with a set of stainless steel valves coated with a black nitride, stiffer valve springs and titanium retainers. While it would be easy to just setup a full race head, Darrin decided to stick with a setup offered for his street engines, even with the rules we stated. He stated: "This engine has every part that I have found to work great. Also CNC porting offers consistency from one head to another."
Unfortunately at the time of this shoot, the head was still in its beginning stages of porting. We were able to shoot one of the B16 heads that has the same type of finish and exhaust port as the B18C he will use. All of the R&D cylinder heads are measured for flow on the Super Flow flow bench, which is Darren's proving ground for power. Come to think of it, we were surprised to find a Super Flow at each of the tuner's facilities. It's almost like it's the Dynojet in the cylinder head world. Never the less, it the best way to find out if what was added or removed on the cylinder head works. And in R&D's case, they have found what works best for them and have since loaded their formula for power in a CNC mill to accurately repeat the results each time. R&D is one of two companies that are using CNC porting in the competition.