Our 2001 IG 32 has the 315/330 Cummins in her. Have the same question as to why original owner opted for it. Not any additional speed over a friend's IG 32 that had the 210 and we have a turbo and aftercooler to maintain and be concerned about.
Our 2001 IG 32 has the 315/330 Cummins in her. Have the same question as to why original owner opted for it. Not any additional speed over a friend's IG 32 that had the 210 and we have a turbo and aftercooler to maintain and be concerned about.
I don`t know Eric. Posts seemed to imply the 210 was NA.I`m happy with NA Lehmans, but Cummins have a great reputation. Still, the IG32 can`t use the 315hp. Cross reference this thread: http://www.trawlerforum.com/forums/s3/engine-size-vs-hull-speed-30230.html#post520593Bruce is'nt the na Cummins engine 115hp?
You're right about the I.G having an SD hull but my old boat, SeaHorse II, had a Cummins 330B in it and still would not get on plane! It did make all the published numbers so it wasn't over or under propped.I don't think the I.G were full displacement hull, rather semi so the extra HP may get it on plane, maybe a slow plane. Don't know.
I`d expect high fuel usage for little gain. The IG SD hull is more D than S imho. I still say the IG 32 has no real use for 315hp, 210 hp would be plenty.You're right about the I.G having an SD hull but my old boat, SeaHorse II, had a Cummins 330B in it and still would not get on plane! It did make all the published numbers so it wasn't over or under propped.
I don't know much about Cummins. But I do know there is a 115hp Cummins 6 cyl engine. Must be NA too.
And I think a 120hp increase in power should definitely make an IG go faster. It has the flat and straight run aft to allow that to happen .. all other things being fairly normal.
I don't think the I.G were full displacement hull, rather semi so the extra HP may get it on plane, maybe a slow plane. Don't know.
You're right about the I.G having an SD hull but my old boat, SeaHorse II, had a Cummins 330B in it and still would not get on plane! It did make all the published numbers so it wasn't over or under propped.
I`d expect high fuel usage for little gain. The IG SD hull is more D than S imho. I still say the IG 32 has no real use for 315hp, 210 hp would be plenty.
The IG and Cal hulls are SD but much closer to planing than displacement.
The think that keeps them acting like SD is weight and at least in the case of the IG .. a big draggy keel. Maybe the Cal has that too but I don't remember. Comparing the four a GB and a NT are much closer to FD than the IG and Cal.
So with more power an IG should step out and go faster. If the bottom to transom edge is quite rounded and not sharp .. that would prevent planing or a little faster speeds. The roundness of that edge would suck the stern down and back.
Al yes 500hp and 23 knots on a Cal is what I'd think would happen. Anyone have 500hp in an IG?