TomZ - How do you like the XE274 Cam?
06-24-2002, 08:00 AM
#1
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TomZ - How do you like the XE274 Cam?
Have you gotten the chance to put any hours on it? I'm almost ready to put my 406 back in the boat, and I've got the itch to add some power. I ran the comp cams 262 last year, it's pretty mild. Would love to go roller but that's not in the budget.
06-24-2002, 04:24 PM
#2
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So far it's been great!
The idle speed is a little higher than I'd like but I think I can work with the tune a little more to get it down some. I raised the idle a bit this last trip out so that it wouldn's stall when switching between forward and reverse. I think part of that problem could have to do with the flexplate that I'm using. I might switch back to a flywheel to counteract that issue as well.
Power is great with this cam, though I have yet to really run at full tilt. The prop that I have sucks and is limiting me to 43-4400 RPM trimmed out. At slow engine speeds it is really responsive though and I can run about 35 MPH at 3k RPM. I have gotten about 50 MPH on GPS but I'm short about 1000 RPM on the top end. I'm going to switch over to old pulling prop (Mirgae 17P) and see how it responds. I'll lose some speed on the top end I'm sure but I'm also sure that it'll go faster than it's going now. I can also tell the the engine really wants to get up and go as it will come up on that limited RPM really quick while making strong headway. It goes from a cruising speed (I don't holeshot it... the drive won't handle it) to top-end very quickly. Again, I think the design of the prop is what is holding everything back. I think that the biggest power gains will be seen above 4500 RPM (peak power with this cam is 5500).
I'd go for it especially if you have a light boat. You might want to watch for reversion though. I have not seen any signs of it since I've had it out on the water, though it was sucking some water while on the trailer (I was using low pressure from the tap, but my driveway points the trailer downhill some and may have hurt the water drainage some).
All-in-all I like it! It also sounds sweet at the dock.
The idle speed is a little higher than I'd like but I think I can work with the tune a little more to get it down some. I raised the idle a bit this last trip out so that it wouldn's stall when switching between forward and reverse. I think part of that problem could have to do with the flexplate that I'm using. I might switch back to a flywheel to counteract that issue as well.
Power is great with this cam, though I have yet to really run at full tilt. The prop that I have sucks and is limiting me to 43-4400 RPM trimmed out. At slow engine speeds it is really responsive though and I can run about 35 MPH at 3k RPM. I have gotten about 50 MPH on GPS but I'm short about 1000 RPM on the top end. I'm going to switch over to old pulling prop (Mirgae 17P) and see how it responds. I'll lose some speed on the top end I'm sure but I'm also sure that it'll go faster than it's going now. I can also tell the the engine really wants to get up and go as it will come up on that limited RPM really quick while making strong headway. It goes from a cruising speed (I don't holeshot it... the drive won't handle it) to top-end very quickly. Again, I think the design of the prop is what is holding everything back. I think that the biggest power gains will be seen above 4500 RPM (peak power with this cam is 5500).
I'd go for it especially if you have a light boat. You might want to watch for reversion though. I have not seen any signs of it since I've had it out on the water, though it was sucking some water while on the trailer (I was using low pressure from the tap, but my driveway points the trailer downhill some and may have hurt the water drainage some).
All-in-all I like it! It also sounds sweet at the dock.
