Looking to raise TRS drives on a Formula 302LS

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01-07-2014 | 07:57 PM

#11

carcrazy167

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Joined: Sep 2007

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Quote:

Originally Posted by MILD THUNDER

Like lil red said, what is your current x dimension.

I can tell you, a friend of mine did this on a 1979 30FT Scarab hull with TRS when he did a new transom. With a pair of 540's, the boat ran 92mph and was very stable with the raised drive height.

I'd really like to know more about that set up. I have the identical rig (minus raising the X-dimension). What was the X-dimension he started with and what was it after he raised it? What prop is he using? And how did changing the X-dimension affect getting up on plane? Any chance I could talk to your friend about it?

01-08-2014 | 08:00 AM

#12

MILD THUNDER

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Joined: Jul 2004

Posts: 11,332

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From: chicago

Quote:

Originally Posted by carcrazy167

Shoot me a PM, and I will put you in touch with him. He doesn't post on here much.

I know he was running a 26P Hydromotive quad IV-X rounded tip 4 blade, spinning them to around 6k RPM. His 540's were solid roller, Dart heads, made a tad over 700hp each. He had good luck with the TRS staying together on that setup. I think the key was letting the engines rev to get the load off the drives.

02-11-2014 | 01:27 AM

#13

Hang Time 27

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Joined: Nov 2003

Posts: 190

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From: Annapolis, Md

Quote:

Originally Posted by MILD THUNDER

His 540's were solid roller, Dart heads, made a tad over 700hp each. He had good luck with the TRS staying together on that setup. I think the key was letting the engines rev to get the load off the drives.

I made the mistake of not doing that - 540 w/ just less than 600hp spinning only 5,200... blew 5 TRS's in 5 years.