Thread: Helix SI/GPS at higher speeds

It depends on the turbulence coming off your boat and across the tx. Some transoms just won't allow a good mount to get a reading. You can also try angling the tx forward a few degrees for an improved 2D reading at high speed, but that would make the SI look funny when using it

15mph is better than what I'm getting.

SHOW US A PIC OF DUCER,U SHOULD BE ABLE TO GET GOOD 2D, I CAN STILL SEE DI AND SI AT THAT SPEED BUT NOT A GOOD PIC,DO HAVE DUCER ANGLE A LITTLE,DOES NOT AFFECT THE PIC ON SI,IT WOULD TAKE A LOT OF ANGLE TO AFFECT PIC,I GO BY BRIDGE PILLINGS AND THEY LOOK FINE

You can add an in hull transducer to solve your issue.

Originally Posted by crappielimits

You can add an in hull transducer to solve your issue.

Correct ... "If" he has a fiberglass hull ...

You would also need for a shoot thru application ...

Humminbird | XP 9 20

Humminbird | AS SIDB Y

Rickie

A lot of times your tranducer just needs adjustment. There is a fine line with the way it is mounted. Too deep and you get a big rooster tail, too shallow and you won't get a high speed reading. I have the same unit and I had to adjust the transducer several times before I got it just right.

Lowered. Mine 1/4inch reads top speed. Now 32 mph

Originally Posted by genec

SHOW US A PIC OF DUCER,U SHOULD BE ABLE TO GET GOOD 2D, I CAN STILL SEE DI AND SI AT THAT SPEED BUT NOT A GOOD PIC,DO HAVE DUCER ANGLE A LITTLE,DOES NOT AFFECT THE PIC ON SI,IT WOULD TAKE A LOT OF ANGLE TO AFFECT PIC,I GO BY BRIDGE PILLINGS AND THEY LOOK FINE

I've got mine angled down a bit.