Hey Jawamaster thanks for the addition of info. Have been involved in racing and engines for many years. Just wondering how the F.I. makes the engine that much faster if a carb is set up right. I understand the F.I. controller sets the Fuel -air ratio at a optimum amount designed to fit the injectors. The computer also controls the pulse length but the timing also has to be altered to compensate for the fuel changes. This requires a very complex controller like a Power Commander for a Harley with a lap top to remap it all the time and a lot of dyno time to see which maps work best under what conditions. This also requires a climate controlled environment so you can change all the variables, humidity, bar pressure, temp, altitude very complex. What I have found on the Harleys is mainly a small increase in the throttle response not in overall performance. That's why Nascar engines didn't increase in power when they shifted to F.I. just a little bit quicker on and off throttle input. Iam not much of a computer genius so a carb is the way for me. To the 450 people, You Guys astound me you talk about expense of the Jawa then go right into making all these custom parts for the 450. Lets look at what you are saying first 2,000 engine, custom crank, custom rod, custom cams, custom cases, custom pistons. Plus look at all the work involved. Every rebuild will be a lot of custom parts too, not cheap either. the Jawas longevity should be very because the 889 model 90mm bore and 77.6mm stroke. That's a very short stroke for that bore and makes its power at 8,500-9,000.Thats a very tolerable range for the longevity of a racing thoroughbred engine. Hope everyone had a merry Christmas.
