I plan to use this car as a teaching tool to teach my Godchildren how to race. (Autocross, 1/8 mile drags, open road racing) I do not need or want a high rpm engine. With an AOD, 3.25:1 limited slip rear and 26.5" tires, 100 mph is only 2885rpm. 170 mph is only 4990 rpm (assuming no slippage in the trans, etc.) So I really don't need or want to spin the engine real high. Basically the only reason for getting the larger Mas-air meter and throttle body now is that I don't already have these parts, and while not causing a gain on this engine, they should also not hurt. The BBK instake is designed for a 75mm throttle body. The Mas-air meter could be downsize to a slightly smaller size, I agree. When I build a new engine in a couple of years, I will already have some of the parts that I will need for the engine that I will build. The next iteration will be a 331 stroker with a Rotrex supercharger, a custom cam and a different transmission. This one will be built for mid to upper rpm power primarily aimed at the Silver State Classic open road race. The point of the original question was simply to ask if I could trust the information indicated by the Desktop Dyno software. Thanks for all the replies. There was some good information in there and every point of view is appreciated.
Sorry Jay you got more than you were looking for but you know how these things go. I would comment on one more thing about air meters and throtle body sizes. The size does control airflow speed into the cylinders. This is throttle response affecting. While the HP may not be affected to much, the engine response to throttle application become slower with slower air speeds in the intake tract. Much the same as to large a carburator slows air speed to drawing fuel out of the nozzles from the fuel bowl. This is the real reason not to size to large for general use over a wide rpm band. Lastly, don't travel at speed to far over 100 mph on the road. These cars get to much air under them and become very lite on their feet. Good luck.
Believe me, I know how light they get. I was clocked at 147mph in a stock body 72 Comet GT in 1985. It must have taken me almost a week to retieve my seat cushion. Planing to lower the car dramatically, build a custom front airdam, smooth the grill out, etc. for better aerodynamics before trying to go faster than about 100 for any distance. Also planning to make all those parts as bolt-ons so I can have the stock Maverick look 99% of the time. I will be using the entire RRS suspension and steering setup so will have a fair amount of adjustability with the ride height. After reading your message this morning, I called BBK, gave them the specs on engine / driveline and intended use. They recommended that I use a 70mm throttle body even though the intake is designed for a 75mm. They also suggested a matching mas-air meter. Thanks for the good information.
