What's the max

**Tony M** · 04-07-2009 09:17 AM

On a BARVO 1 WITH A 1" SHORTY , HP / TQ and still have longjevitty

**VetteLT193** · 04-07-2009 09:44 AM

how do you drive? if you don't air it out, shot gun it out of the hole, etc. it will take a lot more power.

If you ream the crap out of it, hammer the throttle, air it out, land at full throttle and put it away wet a mild small block will blow it.

**Geronimo36** · 04-07-2009 11:51 AM

Std. Bravo or XR?

In my experience 5-600 for a std. bravo seems to be about max and 700 for an XR. You can go more but longevity will suffer.

Naturally aspirated vs. supercharged and RPMS also make a difference.

**Tony M** · 04-07-2009 05:25 PM

Originally Posted by Geronimo36

Std. Bravo or XR?

In my experience 5-600 for a std. bravo seems to be about max and 700 for an XR. You can go more but longevity will suffer.

Naturally aspirated vs. supercharged and RPMS also make a difference.

rpm's about 5200 @ W.O.T MAX drive maped @5600

**MattBMiller** · 04-07-2009 05:30 PM

It's all going to depend on yoru right arm....

**MOBILEMERCMAN** · 04-07-2009 07:03 PM

Originally Posted by MattBMiller

It's all going to depend on yoru right arm....

I like that answer Matt

So true

**MERPerformance** · 04-07-2009 07:33 PM

We have up-graded alot of drives with Max Marine, shafts, treated gears, full towers, billet alloy top caps, have ran 900+HP with HI torque, what fails is the junk gears that you have to use, because of the way they are made. If you can keep the drive cool that helps alot, I block the water inlet and add a #8an to the left side of the drive and run the water to the top of the drive with a full plate drive shower that floods the upper with out having the water splash off the drive. The lowers hold up pretty well with a 1.250" prop shaft and a larger vertical shaft from Max, or Imco. I have seen the upper gears seperate from the cone clutch area of the gear, like you just twisted it off! Push out the spanner nut from the case, if it's not an alloy deep thread style from either Max or Imco. The upper gear back-lash settings on a good gear set, stay about right at .005 difference on total run-out of .010- .015 backlash others that are bad can be .008 on one side and 180 degrees be .018-.020. I would agree that 650-700 on an XR will hold up with out alot of hammering. Sorry, if that was to long.