HOTTZU98

This may be a stupid question but how accurate have you found Gaffrig speedometers to be? Some people have told me they are pretty close to there GPS readings. I was just trying to see what others have found.

US1 Fountain

iTrader: (1)

Mine is right on up to about 50, then it gains a couple by top end, mid 70's.

Speedos are nothing but a pressure gauge. The quality supply of water, or lack of, to the pick up will have major effect to the accuracy of the gauge.

hillbilly24

they are pretty accurate in the mid range but not at slow speed ot top end. If you plan on doing any bragging you better have a GPS speed and preferbaly a picture using the tattle tale

Strip Poker 388

iTrader: (6)

Mine is good to 90 then the pickup is out of the water.

Now as far as the other gages . fuel pres,oil pres. there off

Harper220

My water pressure speedo (Eliminator gauge) which I believe is Gaffrig, never worked worth a dam on the Daytona. I think with the high X dimension that the pick-up on the drive is getting too much air to be the least bit accurate. It always read about 25-30 mph slow...

US1 Fountain said it right about the quality of water supply to the pick-up.

Harper220

In addition, I recently installed a Livorsi GPS speedo and took away all the guesswork, not to mention plugged pick-ups...

OldSchool

On my Bullet, the speedo is dead on until 60 mph, then it exagerate's like it's been drinking all day!!! About 4 mph over gps readings at top end.

HOTTZU98

My boat only goes about 60mph this year that is,after I get a 500 in it ,it should kick ass!!! So maybe it is accurate? I will have my gps installed this weekend.

Dave M

DITTO! I had a Gaffrig speedo prior to the GPS speedo. My pickup tubes kept getting bent. When the tube was new, the speedo read 5 MPH high. Then it would get bent backwards and read right on. Then it would get bent more and read low. So, with my boat it depended on the angle of the tube. When it was reading right on, I took the tube off and traced it on a piece of paper. I hoped that when it got bent again, I could bend it back to the ideal angle. No luck, they tend to break if you try to bend them back. Get a GPS speedo and be done.

Wobble

My speedo reads 80 at gps speed 73. I love it
spot on at 50. I just keep the gps speed readout in a small corner of my Garmin. Very useful for finding optimum trim setting.

Content to let my passengers believe the Speedo guage