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Sorry for my confusion, Jim. The only tangent reference I know of with regard to radar is the relationship of the in-phase and quadrature parts of the signal, used to calculate signal to noise ratio and I doubt that many radar gun owners would need to know or bother with that. Straight toward...

I think you'll find that the error is a cosine angle factor rather than a tangent. I've had a Stalker ATS with STATS for years. Always accurate and reliable. Regards, Doug

The pressure nipple is a straight one, not plugged and I can see the tank top bow out slightly as I jazz the throttle. I don't think there's any problem with pressure. I have several props in the X460-465 range that I can try it out with. Mark Sholund made me an X465 that has a diameter of 63mm...

Ran it on the hose just now and I think it's going to be OK. For the first time, I can run with the ground off low speed needle and it will run at 1/3 throttle. With the BVM set at about 2 1/4 turns out, when I blip full throttle it will hesitate for a second, then clears itself out and the...

Hi Joe, I just went out and took the motor out of the boat and removed the rear cover. As the disc fell out again, I was ready for it and caught it so I could put it back the same way it came out. Looks like it was backwards! When it fell out before, the way I checked it with my other motor was...

Yeah, I did pull the head and it looks fine in there. The O-ring for the water jacket is in good shape. The piston looks good as well as the bore. I just thought of something although I don't think it's an issue. When I first got the engine, I removed the rear housing that the carb attaches to...

Well, I finally got a chance to try the boat this weekend and unfortunately it still won't run. Here's what I did: 1. Cut off the idle needle taper just beyond the threads so there is no taper that gets inserted into the spray bar at any time. I screwed the idle needle in so that it's O-ring...

Thanks, Joe. My God, you have a lot of boats! What's your opinion on the 101 versus the 91? I guess I might also ask what your opinion is about the 91 versus my stock 90 Gold Head from the mid 1990's. How about single versus dual plug heads? I have both, but am starting out with the single.

I should have been more clear. The shaft centerline is in fact 3/8" ABOVE the bottom of the sponsons, which makes the bottom of the strut exactly flat on the table with no angle, just as you have indicated it should be. I had adjusted the strut height by doing exactly what you said. The fact...

OK. That's what I'll do then. I'll cut the taper off the idle needle and screw it all the way in. That takes it completely out of the barrel. The straight fuel inlet protrudes the same distance into the barrel as the very end of the pictured needled, notched inlet does. That's fine then. I...

So you're talking about cutting off the whole tapered part of the needles beyond the threads. I get that. One thing that I guess I haven't explained properly is that in place of the main needle and fuel inlet piece on the carb, I have installed a straight fuel inlet that was designed to be used...

Hi Bob, The difference is that we're dealing with high frequencies here. A straight piece of wire looks like a short circuit to DC and low frequencies, but as frequencies increase, the wire now starts to increase in effective resistance. At certain frequencies, depending on it's length, it will...

Hi Joe, The original high speed needle/fuel inlet had a notch in the end where the new non-needle fuel inlet has no notch. Attached is a picture of the original stock fuel inlet and needle that shows the notch. The fuel inlet that I replaced it with has the fuel inlet going straight in where...

Thanks, guys. I don't think any water is getting in the carb at launch as the cowl protects it very well. I'll check that, however. I've resolved myself to the fact that there's probably a Boris Mazur flow meter in my future at some time, but I also suspect that this thing can be made to run...

I just put a 90 CMB Gold Head and a BVM needle in my 19 year old Sprint Cat 80/90. I bought the motor used and just broken in from Allan Yuen, and thanks also to Stu Barr for the CMB pipe, header and remote needle fuel inlet, Walt Barney for the tank and needle, John Otto for the 40% nitro fuel...

Actually, it was 8 EFI's. They were based on the 2 liter blocks rather than the 2.4's so that the boat could come in under the 16 liter Class 1 rules at the time. Ultimately, the boat ran only one race to qualify for an attempt on the Kilo SAW record, which he got. He may have actually used...

The Winne speed limit isn't really enforced out in the big part of the lake (the Broads, as they call it) and they usually ignore people who aren't making a lot of noise close to shore or driving dangerously. The OL has never seen Winne, only salt water. I did get nailed on Winne with the...

The motor that's in it now is a Moki 90. I have no idea what kind of power it makes and there's virtually no information on it anywhere. I was convinced to get the engine by a hobby shop dealer who was a Moki dealer. It's an ABC, but there's no real way to shim the head since there is no...

Greetings to everyone from up here in New Hampshire. Just joined this board. Here is my Eliminator Scorpion with the 2.5 EFI OS. About 106 on a good day. Also, the Outer Limits 42 with 1025 Sterlings, good for about 115. And the reason I joined; resurrecting the 19 year old Sprint Cat 90 that...