Air Flow Research (AFR) has created the modular design, single-plane Titon TXR Race (P/N 4801) and Titon TXS Street/Strip (P/N 4802) lightweight composite intake manifolds for small-block Chevrolet engines, including those equipped with most of the popular aftermarket aluminum cylinder heads. AFR notes that these new manifolds are worth 15-plus-hp and a 15% gain in torque at lower rpm levels.
According to AFR President Rick Sperling, “At 5.5 inches in height, the longer runner Titon TXR (with square bore Holley 4150 carburetor base) works well on mild to moderate Chevrolet 350 small-blocks in the 500-hp range, just as well as it does on larger displacement SBC engines (in the 650-hp range) with big heads and an appetite for plenty of air. AFR also offers 1-inch composite spacers in either four hole or open clover leaf design to fit the product line.
“At 4.58 inches in height, the Titon TXS (with square bore Holley 4150 base) was designed for folks looking for the performance benefits a single-plane intake offers, but who don’t necessarily have adequate hood clearance to facilitate the use of the slightly 1-plus-inch taller TXR.”
The lightweight composite material used in the construction of both Titon manifolds offers a weight savings of 9-10.5 pounds (depending on model) compared to an average cast-aluminum SBC intake weighing around 24 pounds. Titon’s common base plate (using Viton gaskets) is user friendly, offering the ability to change intake runners without removing the distributor or breaking the water seal. It also runs 30% cooler than a cast-aluminum, single-plane intake, providing a denser air/fuel charge, hence the 15-plus increase in horsepower, not to mention being a big plus for crucial cool down periods between rounds. The Titon also features about 5% less carburetor vibration. The universal base plate also features dual distributor hold downs (clamp included), cast-in N2O bosses, and comes complete with 12-point 3/8-inch bolts and washers. These manifolds are affordably priced at $599 F.O.B. Valencia, California, and are available through participating AFR retailers.
AFR also offers the dual-plane Titon SBC composite intake for applications where max torque and low-end horsepower is required. A Dominator-style Titon model will also be available later this year for maximum horsepower with larger displacement/higher rpm engines. A Titon big-block Chevrolet composite intake manifold application is also in the planning stages, but is not yet available at this writing..
Anyone into nitrous racing knows who Nitrous Supply’s Mike Thermos is. With AFR’s recent release of the Titon TXR composite intake, Thermos and company developed a nitrous kit for this application using a pair of NS 400-hp N2O solenoids (depending on jet size, 200-500 hp is a realistic figure), a pair of 100-psi NS fuel solenoids, 3/16-inch electro-polished stainless steel hard lines, -3 AN nuts and -3 AN compression fittings, four NS distribution blocks, a set of NS new stainless-steel eXtreme flo 90-degree discharge N2O fogger nozzles, -6 and -4 inlet fittings, an assortment of CNC-machined jets, two braided-stainless -4 hoses and 1-Y-fitting.
Depending upon your requirements, Nitrous Supply will sell you a complete kit, including either a 10- or 15-pound N2O bottle from $1,000-1,300 F.O.B. Huntington Beach, California. Plumbing starts at around $400, which includes drilling, tapping, installing nozzles, bending tubing, installing all fittings, jets, filters and solenoids and test flow for leaks and proper operation. There’s very little difference between plumbing a composite small-block Chevrolet manifold from a cast-aluminum version. But if you screw it up, you can’t reweld plastic! Upon completion, the finished product weighs a scant 15.05 pounds, so it’s obvious that the weight-saving and performance advantages of the N2O-equipped Titon TXR more than justify the overall expense.
Air Flow Research
Nitrous Supply, Inc.
An AFR pre-production Titon TXR composite manifold, this flyweight was designed to fit the small-block Chevrolet family of engines and weighs only 10.5 pounds.
A magnetic angle finder or protractor is used to set up the Titon TXR at zero degrees in order to drill a series of ¼-inch holes dead center in the N2O bosses.
A standard ¼-inch (.250) drill bit is used to drill out the N20 bosses.
Next, a 1/16-inch NPT pipe tap is used to thread the holes to accept the set of NS eXtreme flo 90-degree discharge fogger nozzles.
With drilling and tapping completed, the NS eXtreme flo 90-degree discharge fogger nozzles are ready for installation.
This port angle photo shows the NS eXtreme flo 90-degree discharge fogger nozzles located dead center in the TXR composite intake runner.
NS uses 3/16-inch electro-polished stainless-steel hard lines with pre-flared tips for this installation. It’s necessary to use a high quality tubing bender to produce smooth radii and avoid kinking.
With -3 AN black “B” nut installed at the flared end, the outside leg hard lines are fabricated. A measurement of 2 ½ inches is arrived at from the seat of the jet to where it begins its 90-degree, 4-inch run to the N2O/fuel distribution block.
Jets can be changed for more or less horsepower as well as rich and lean conditions per cylinder. In this application, a .028 jet for the nitrous and a .024 jet for the fuel are installed.
Here are the CNC-machined N2O/fuel distribution block, four of which are used in this application.
The outside leg of the N2O lines are completed, and the inside leg or fuel lines are being fabricated.
Compression fittings and chrome-plated -3 AN nuts are used to secure all lines to the N2O/fuel distribution blocks.
The installation of the 90-degree N2O fitting onto the inside N2O distribution block makes sure that it’s thoroughly seated to avoid leaks.
Show-quality chrome NS solenoids are selected for this installation. On the right is the gasoline or fuel solenoid, flow rated at 100 psi. The nitrous solenoids are capable of 400 hp each.
Here is the installation of the fuel solenoid onto the lower side of the fuel distribution block.
With the nitrous solenoid hooked up, the 90-degree blue (for N2O) fitting is securely tightened.
Both sides are fully plumbed. The -4 braided stainless steel N2O hoses running to the solenoids are installed.
This is the -6 Y-fitting that joins the two N2O lines to become one common nitrous feed line exiting from the tank.
Talk about a flyweight contender! We have a total system of just 15.05 pounds.
Nitrous Supply offers either 10- or 15-pound N2O bottles in a variety of colors or polished aluminum.
Text and Photos by Bob McClurg