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View Full Version : 455 does 67@4900RPM's GPS is better acuracy



Eric455
06-01-2002, 05:33 PM
okay guys, i'm realy sorry to me so stoburn and keep saying that i was doing 80 @ 4500 rpms i was using and indash speedomoter. and it was false. so i went to the lake with my boat and my friends HTM SS 24 and he has gps along with indash speedomoter. and i found out that i was doing 60 instead of 80 hey i took all of you guy's words's and took it out for another test so it reall goes 60 mph @4500 rpms, pushed it to 4900 and did 67. what do you guys think. thanx -Eric

Jungle Boy
06-01-2002, 06:05 PM
That sounds better. Like was stated in a earlier post. Lots of guys think they are ripping up the water untill they are holding a GPS. 67 mph still ain't too bad for a heavy Olds motor.

searssears1
06-01-2002, 07:31 PM
Cool.

lakesmodified
06-01-2002, 07:40 PM
"it really goes 60 mph @4500 rpms, pushed it to 4900 and did 67. what do you guys think. thanx" -Eric [/B][/QUOTE]
Eric, 67 MPH from a basically stock 455 is damn good! My last jet boat, a 1978 19FT Bahner with a Lew Larson BUILT LS-6 454, tunnel ram, dual 750 DP Holleys, MSD ignition, Berkley JC and place diverter would only do 74 MPH (approx 5200-5500RPM)on GPS. So I would be really proud of a stock Olds 455 pulling 67...

Eric455
06-02-2002, 12:01 AM
yea i know i was still surprised at 67 so i tried it again and still got 67 almost 68 but didnt push it. you knwo i dont want to turn another rod! hahaha. yea it does good for an olds. i dont want to spend anymore money on the engine man i've spend like 2300 dollors on this engine and man i want a new boat to work on now.

lakecrazy
06-02-2002, 04:14 AM
On another jetboat forum, One of the members has a good name for the gps. He calls it "The Humbler"

Moomawnster
06-02-2002, 05:02 AM
Yeah ! I got "Humbled" last year , speedo said 65mph at 4k gps said 59 , stock 350 will be upgraded next summer ! I want 70 !

Wet Dream
06-02-2002, 05:15 AM
Those numbers sound a little more realistic.

77charger
06-02-2002, 01:28 PM
we have honesty.sounds better.

Blown Sleek
06-03-2002, 03:25 PM
So how bout a little honesty from you mr I forgot my G.P.S!! (77 Charger) Maybe you'r boat was going so fast cause the floor flying to? Just kidding it is river time!! Lets go!!

77charger
06-03-2002, 04:23 PM
Originally posted by Blown Sleek:
So how bout a little honesty from you mr I forgot my G.P.S!! (77 Charger) Maybe you'r boat was going so fast cause the floor flying to? Just kidding it is river time!! Lets go!! i thought you taped the gps to my boat and removed it before i saw it.My boat is a sled you saw it its only a 429 ford to top it off oh and single 750 vac secondary carb too.