How many hp can a TRS take without going kablooey?

If they are set up correctly, they can handle about 500 hp before the lower right hand pinion gear goes away.

I swapped out my TRS drives for a pair of Konrad 540's. They are the answer for all the TRS boats out there. I could not be happier with the Konrad product.

check 'em out www.konradmarine.com

Kurt

In my experience the right hand TRS will handle more HP (I'm running over 600 with no prob. but I've cryo-treated my stuff) cause the prop shaft gear is loaded against the nose of the gearcase, unlike the left hand unit which loads the p.s. gear against the rear bearing carrier. If you decide to go for the Konrad (which I've heard nothing but good about but can't afford) Keep me in mind as a home for a good, used, fresh water TRS. I would certainly be interested in a spare at a reasonable price. --- JP

On Bam web site he claims up to 550hp

http://www.go-fast.com/trs_drive_gear_failures.htm


good luck,

Jack

thought it was the other way around. port drive was stronger that starboard.

My experiences with TRS's are that the right-side lower is the weak link. I went through four right-side lower pinion sets this year alone, and three of the failures took out trannies with them. Ouch! I'm running HP500's, at 5000rpm for 45 minutes in race conditions.

I'm with Biggus, the Konrad 540 PRS program is the only way to go if you have any power more than the 330's or 420's the TRS's were designed for. After switching to the Konrad setup, I have been able to hammer them mercilessly and not worry about popping gear sets. I've got three races on them, and 7-8 test sessions without a hitch. Using my past TRS calculations, I should be on my tenth gear set with 8 tranny rebuilds.

Life is Good.

Brian

So it is safe to say that 700 hp on a heavy boat driving in race like conditions in snotty water is gonna grenade a pair in no time?



can you mix and match a ssm lower to a TRS upper and gain any better results??? or is this impossible? and Konrad the only route to go??

Well, "no time" might be overstating things a bit, but I think you can count on them lasting just a short time.

I've not tried a SSM lower on a TRS upper, but I've also never seen anyone suggesting that it can be done. There are some pretty saavy guys on this board, and if it could be done, someone would be talking about it.

The attractive part about the Konrad setup, aside from them being seriously beefy and that they're running in Navy applications for literally 1000's of hours, is that they just bolt right up. A SSM setup will require glass work, and a Bravo-like (IMCO, Teague, B-Max) setup requires relocating your motors, as well as some transom work.

In my opinion, yes it's the only route to go.

Brian

With the right abuse combination (enough rapid advance on the throttle, load out of the hole with a big enough prop that she is hooking up quickly ) even 400 HP will momentarily seperate the pinion (left one) gears and cause the ultimate grind down and then melt down and lock up and blow a drive plate within 5-20 minutes after the fact.

Every day running without shoving the sticks to the wall and jumping it out of the water, they will last a long time. The cleaver props with a little blow out are good for these drives. 4 and 5 blades that give you a great bite will eat em up!

thanks for all the advise guys.