Bravo XR Capabilities?
#52
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Thanks to all that responded so far!
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I have not heard of a single SCX upper gearset failure so far. it may have happened, but it has not been posted on here. There have been guys running well over 1000hp through them for many hours without failure. Your 700hp isnt going to hurt it much unless you like getting air and bouncing it off the limiter before reentry.
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And for $30k a side!!! for just the outdrive, they should look great.
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At the moment, I'd say the best overall alternative would be NXT's, followed by Konrad, and then Arneson. You simply cannot channel Top Fuel horsepower through Kia transmissions.
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#59
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FYI... XR's have a problem with the upper drivshaft. Not the gears themself. THe upper drivehaft "sits" in the niddle bearing. This bearing was changed some time ago to "more" spindles and smaller"..thus makes a grove into the driveshaft. It starts to "wobble" (even miniscule amount) and poof.
Older Bravos had niddle bearing with larger "spindles" (I'm not sure on this) but I think Imco and others use hardened or "stronger" upper drivshafts, and going back to the "larger" size spindled niddle bearing. Mercs. XR's has a bit better upper driveshaft then the STD Bravos. I think they have "some" hardening, but the niddle bearing (or is it called pin gear?)... still digs into them.
The bad thing is that Merc. just won't admit it and comes up with all type of excuses for failures. Now..
I'm not saying this upper driveshaft is the case ALL the time... but waaaay too often.
Older Bravos had niddle bearing with larger "spindles" (I'm not sure on this) but I think Imco and others use hardened or "stronger" upper drivshafts, and going back to the "larger" size spindled niddle bearing. Mercs. XR's has a bit better upper driveshaft then the STD Bravos. I think they have "some" hardening, but the niddle bearing (or is it called pin gear?)... still digs into them.
The bad thing is that Merc. just won't admit it and comes up with all type of excuses for failures. Now..
I'm not saying this upper driveshaft is the case ALL the time... but waaaay too often.
#60
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