Thank You! We didn't count, and we will(now I'm far away). Other strange thing - our first ridings with solas 4x14X21 seems to go to 30mph on 4000 rpm, engine was not so powerfull. And now we have power, propeller merc spitfire 4x14x23, but speed seems less...
My guess is that you are way way over-proped
Yes, all You said is true. It's possible we have some err in speedometer, unfortunately on the last rides I compared with the GPS and it corresponds (american miles per hour, not knots). Here it is on around 3500
drive.google.com
drive.google.com
drive.google.com
No, this is original Glastron Carlson CV-27, sold in Germany. With ONE mercruiser 260 5.7L V8, and sterndrive should be MC1. I found same configuration in Swiss(even same paint). I see in magazines, CV-27 sold with twin Merc 260 from the beginning. Only few test boats made with one engine. I have no explanation for our single-engine. Tobias from Switzerland have no explanation for his CV-27 too. It can be some special order for the rivers and lakes, or, test boats sold in Europe. Twin-engine CV-27 should go to 110km/h, Tobias said - his single-engine CV-27 goes up to 80-90km/h. Two boats are from the 1979, which is the first year of production. I have no answer from Glastron Carlson, it seems old company ended. Here is the serial number https://drive.google.com/file/d/18ZtPur_ZxVMiO8kaYJCUFw0u9HqhHIN0/view?usp=sharing
Think I and a couple others said exactly that previously, perhaps. I think (but not certain) that your mc-1 would/should have been a 1.5. The 1.47 I think (but not certain) came along later in Alpha form. Someone will know better than I. Don’t know too much about the mc-1…other than having one about 25 years ago on a ‘79 fletcher 15ft with a mercruiser 140
Yes, You are right, but we have no original MC1, and the nearest Alpha is 1.47. Now we have 23" prop, which permits 5000rpms(and more) I am curious, if we put 25" prop - rpms should be reduced by 300 - 400, and we will be near to the rpm limit, not away. But is it good idea, to compensate reduction coefficient with the pitch of the propeller? In what limits?
Or the tach is off. Can't imagine that setup spinning at 5k with a 23p
Ayuh,..... Agreed,...... No way in 'ell a single 350 with a 1.50:1 drive, 'n a 23" prop is spinnin' over 5 grand,....
Yeah it’s definitely not anything near a 1.5 ratio for sure. It just be way lower.Sure, no way 1.5:1 drive & 14x23" 4blade prop, to permit engine such rpms. My question is: What can expect, if I put 25" prop, to compensate bigger reduction(probably 1.81) Sorry, I was not clear in prev. post - we have some Alpha 1 gen 1 with unknown ratio, it should be 1.47 for this engine, but I'm sure - it is not
Ayuh,...... It'll drop the rpms @ Wot,...... How much,..?? Donno,.... enough,..?? again, donno,.....Sure, no way 1.5:1 drive & 14x23" 4blade prop, to permit engine such rpms. My question is: What can expect, if I put 25" prop, to compensate bigger reduction(probably 1.81) Sorry, I was not clear in prev. post - we have some Alpha 1 gen 1 with unknown ratio, it should be 1.47 for this engine, but I'm sure - it is not
Very nice boat! Sure, our CV-27 can't be so fast, but I want to make it near to the specifications
I will start with the measuring of the current Z-drive ratio. Unfortunately, boat is not near, and for the moment I can't even measure
For the WOT - I'was afraid to stay on WOT, after the boat is on speed - engine seems can even more. Other strange thing is, that big ventures of the quadrajet carb was not linked, previous owner said - it is for the economy, You don't need them, engine is powerfull enough. But did they work or not - I'm not sure - I must look at them on WOT run.
