Griggs' next trick induction idea is to run the Trick Flow Track Heat upper intake on a Street Heat lower, along with a thick spacer with the transitions blended and radiused, not tapered. The idea is to have more plenum area and plenty of velocity, although Bruce notes it takes a good valve bowl to accelerate the air in such a combination. Unfortunately we didn't get to try this combination during our testing (ours had a straight Street intake). Bruce also noted that even with matched upper and lower intakes, there is a fair amount of port mismatch on these parts, so port matching is always part of the job.
Yeah, there's an engine somewhere in this EFI dyno wiring mess. Just what wires each engine has depends on the customer as ignition choices vary. Plug wires are typically from FRPP because they're inexpensive, they fit, and they're numbered, which helps at the track when things get hectic. Bruce prefers Champion spark plugs, while main engine main Dodge Reidy, seen here making an adjustment, has a penchant for NGKs.
On the fuel and engine-management side, there's nothing exceptional in the intake tract-far from it, due to the horsepower limitations. An off-the-shelf BBK 70mm throttle body and intake tube are the norm. The injectors were 30-lb/hr FRPP units on the test engine (Griggs aims for as much FRPP and Trick Flow gear as possible to aid commonality and reduce ser-vicing headaches). The fuel rails are most often stock. Griggs nominally supplies its engine with valve covers, but often the customer already has a preferred set. The important point is to increase breather area to compensate for the extra 30 ci of displacement. Typically, stock covers with additional breathers welded on are the Griggs solution.
Restricting top-end power is a fact of American Iron life. Griggs prefers the stock air-filter box because it breathes cool air and doesn't cost any money. He often covers half or more of the inlet to restrict horsepower.
Headers are not normally part of the Griggs engine package and are supplied by the car owner. On his cars, Bruce uses BBK exhaust parts because they fit, and BBK is an American Iron series sponsor (Bruce is an unashamed American Iron booster). Griggs' dyno headers are these old 1 5/8-inch MACs that were lying around the shop.