Looking for someone to port and mill my 85 xr2 150.
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Looking for someone to port and mill my 85 xr2 150.
James Perry in Tennessee does exceptional work. He is usually booked out for quite a ways. I’m sure there are others as well. What are you looking to accomplish?
I want to run 70 in a 17' Tunnel/Cat Bass Boat. I don't know what the hull weighs, trailer and hull weigh 1620. Trailer has a spare mounted on a side bracket, but I can't imagine it weighs much more than 600 if even that much.Quote:
Originally Posted by rgsauger
If the little 150 runs now, I would leave it alone. Remove all the black boxes and maybe cut the heads to get your compression up around 140 to 145 psi. Then you have to run high octane in every single drop of fuel that goes through it. Have you run the boat yet? Most of your speed will be found in set up, not in tweaking on your motor.
If you are off by a couple Miles per hour, then motor modifications can get you there. Most of your gains will be found in props and engine height. If it were my boat, I would run it and play with it a little bit and see what’s going on. If you are way off, then you simply need a bigger motor like a 200.
Agreed…..don’t waste your time - find a 2.5
I loved my 2.0L if your not looking for breakneck speed its still a great mota. Lots of little things can be done to pep it up especially an XR2. You can go full extreme and do the champ port specs but you will lose bottom end. The motor will make around 200hp though. All that aside, a friend of mine took his basically stock XR2 powered Valero to 80mph by simply working the set up as mentioned above. He did this with a twice worked over 28p Lightning ET prop by DAH ( not sure what is happening there it was sold to new owners ) but the point of the story is save your money that you want to put to engine mods and buy a really kick ass prop and get your engine height sorted out you will not regret that money spent let me tell ya. Major gains to be had doing this. Might need a water pressure gauge though especially if you do not have a low water pick up.
For my 1992 2.0 150 I installed Boysen 2 stage reeds, added a G-Force Tuner and had the head CC's trued up to 32cc each and saw some pretty good performance gains and was able to run on 87 octane. I was thinking about dry stacking the exhaust but didn't want the noise. Also added a hydraulic jack and a modified prop.
Opinions will vary but I am in the camp of believers in buying a motor that already has the the rated power that you want. Modding is expensive and not to be taken lightly when it comes to jetting and gasoline quality, etc... The time to mod is if you are racing, and performing the class-legal mods you will need to be competitive.
If you are recreational boating (which is what I do), I take comfort in stockness.
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For the record, I have a 2.0/150 too. It's actually just about perfect for my uses. But the top two cylinders are down on compression and up on leakdown. Been that way since i bought it on ebay back in 2012. I have managed to tune it so it runs well, really well actually. But it bugs me that the top two cylinders are that way and this summer I found another motor in this form/weight factor, (a 2.4/200) that I will run while i bore and re-piston the top two holes on the 2.0/150.
-Peter