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| Author: | ry57pont [ Sun Feb 17, 2008 8:04 pm ] |
| Post subject: | gi vs gxi? |
besides horsepower, what is the difference between the 5.7 gi and the 5.7gxi. ? |
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| Author: | millhaven_nice_guy [ Sun Feb 17, 2008 9:52 pm ] |
| Post subject: | Re: gi vs gxi? |
I think the gxi has a rollerized drive train. This gives it a higher WOT. |
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| Author: | 230 Mike [ Sun Feb 17, 2008 10:05 pm ] |
| Post subject: | Re: gi vs gxi? |
Right, and slightly different ECM programming. |
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| Author: | John12 [ Mon Feb 18, 2008 11:41 am ] |
| Post subject: | Re: gi vs gxi? |
does this apply for a 2000 VP 5.0L Gi 250hp and a 2002 VP 5.0L Gxi 270Hp ?. John. |
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| Author: | 230 Mike [ Mon Feb 18, 2008 12:06 pm ] |
| Post subject: | Re: gi vs gxi? |
Hmm, good question. I would think so, but I'm not sure. |
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| Author: | impulse [ Wed Feb 20, 2008 4:52 pm ] |
| Post subject: | Re: gi vs gxi? |
I asked the mechanic who gave us our test ride while we were deciding on four winns boat purchase this very question. He said the gxi is a "hotter" cam if you will. He also mentioned limited or no performance gains between the two. |
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| Author: | 230 Mike [ Wed Feb 20, 2008 5:14 pm ] |
| Post subject: | Re: gi vs gxi? |
That depends on the two specific engines you compare. Marine standards say that any engine can be within +/- 10% of it's published HP and still be "within spec." So the GXi can be anywhere from significantly hotter than a Gi, down to even less than a Gi, depending on the specimens. I'm not convinced that the cam is actually different. Although, it might be. I can tell you that when the GXi is running on muffs at home, the rumble is enough to bring all the neighbors outside  .
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| Author: | ry57pont [ Fri Feb 22, 2008 12:54 pm ] |
| Post subject: | Re: gi vs gxi? |
are both in 02 fuel injected? (5.7) |
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| Author: | Graham R [ Fri Feb 22, 2008 1:13 pm ] |
| Post subject: | Re: gi vs gxi? |
The 5.7GXi I have now has a significantly louder exhaust than the previous 5.7GSi I had; I put this down to the earlier engine having an exhaust hose connected to both the transom and outdrive, whereas the GXi has that short stub rubber exhaust hose connected to the transom only. It gets significantly louder as the drive is trimmed out, exposing the outlet more. I also suspect the ESP is magnifying the sound ( I must be getting old, I preferred the quieter exhaust !) I don't actually notice much difference in performance; if anything, the old 225 with the GSi was slightly faster on top end than the 245 with the GXi. That might just be down to a higher weight ( not mine!) Regards, Graham |
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| Author: | 230 Mike [ Fri Feb 22, 2008 3:04 pm ] |
| Post subject: | Re: gi vs gxi? |
Graham R wrote: The 5.7GXi I have now has a significantly louder exhaust than the previous 5.7GSi I had; I put this down to the earlier engine having an exhaust hose connected to both the transom and outdrive, whereas the GXi has that short stub rubber exhaust hose connected to the transom only. That's probably right. There's nothing inherently different between the two engines that would cause one to be louder. |
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| Author: | St. Louis Dave [ Mon Mar 03, 2008 5:43 pm ] |
| Post subject: | Re: gi vs gxi? |
How about GSI? According to FW, I have a 7.4L GSi/DP - It produces 385 HP compared to the 8.1L GI/DP which only produces 375 HP. What makes the GSI produce more HP? |
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| Author: | 230 Mike [ Mon Mar 03, 2008 7:28 pm ] |
| Post subject: | Re: gi vs gxi? |
The same marketing department that decided last year's 280hp Gi is now 300hp, and last year's 320hp GXi is now 330hp   
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