Quote:
Originally Posted by Shallow Runner
Winner, Winner!!! Which is exactly why they pull the restrictor plate before you leave. Now you have nothing to compare speeds to. Try buying one stock, running it, GPS you're speeds, than take it in and let them pull the restrictor. They might do it, but I doubt it. Take a fools advice from someone who has been down that road. Buy it stock. Tune you're boat. Meaning setup, weight distribution, jack plate, prop, etc. GPS you're speed as you make adjustments. Once you find you're optimum setting, than have at. Hop it up all you want. At least now you can see the HONEST results of what you've done right there on you're GPS. For speed to increase 15% power has to increase almost 50%. I haven't personally looked at the parts diagram between the 40 and 50. I do remember on the 40-D and 50-D tohatsu put out in the mid 90's it was about $1300 in parts to make it a 50. Same block, different carbs, intake, and exhaust. I can believe the electronics are different on today's motor, I would also take a look at the exhaust as well.
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I personally had a tldi 40 that I bought used. It did have the restrictor in the intake. Made a run one afternoon and gps'd it. While on the water, I removed the restrictor and gps'd it again. Picked up 2-3 mph and it accelerated noticeably stronger. This was comparing apples to apples (same day, body of water, load, etc.). I'm not saying it was as strong as a 50, but it was definitely stronger than it was when it had the restrictor in.