Offshoreonly.com - Bravo 1 vs XR / Speed vs Speed

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cocktails

12-19-2008 10:10 AM

Quote:

Originally Posted by jkelly (Post 2761409)

I have a 353 Fastech and went from Bravo 1's to XR's a year ago. I went from 81.9 MPH GPS to 78 MPH GPS. This has not changed in cool weather of hot.

?? Did you loose just top end or did your Midrange suffer the loss as well. Did you expext to loose MPH when you made the change. That is a big loss in speed to go to XR's. Why doesn't Merc own up to it. It pisses me off I can't get a straight answer form them.

Thanks for your response.

kevin

Mr Gadgets

12-19-2008 01:24 PM

Well there is the answer, from jkelly and griff. Sounds like you guys have had the experience, and the result is a loss! Next question, how much loss from XR to Bmax?

rbtnt

12-19-2008 04:46 PM

If the mph loss is caused by the gears, wouldn't there be a lot more heat in an XR?

QWKRN U

12-19-2008 09:46 PM

Quote:

Originally Posted by Mr Gadgets (Post 2762169)

Well there is the answer, from jkelly and griff. Sounds like you guys have had the experience, and the result is a loss! Next question, how much loss from XR to Bmax?

On my 25 daytona. No loss at all actually gained 1 mph. :ernaehrung004:

Mr Gadgets

12-20-2008 07:51 PM

rbtnt,
The XR's do run hotter, not that I have had a guage on each, but that is what is reported. I also see the powder coating in the interior of the XR's falling off, and indication of heat, I believe.

QW,
That stands to reason the Bmax uses a helical cut gear. I just assumed, because of it's size that there may be a loss..
Dick

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