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More speed on a 2008 GTX 155
- Thread starter kellymit
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Kick-Asphalt
New Member
I was just wondering what the top speed is on your gtx 155?
Thanks
Thanks
Chris_cox
New Member
your motors are supercharged with an integrated intercooler in the intake manifold, so yes you have more power hence more speed, if you actually GPS your speed, you should see a reduction of 3-5 mph compared to what the speedo is reading
custompartsguy
Well-Known Member
Chris_cox
New Member
:rofl:i try:cheers:
I hear ya, but don't read too much into GPS technology, a little knowen fact is that all US GPS satellies have a goverment manditory error rate built into any reading you will see off of a commercial hand set.
It's an even lesser known fact that the "Selective Availability" feature that you are referring to was turned off in 2000.
(May 1st to be exact)
Chester
doclomlom
Member
Checked my speedo with a gps, and the speedo reads about 4 mph over when doing anything over about 40mph. So, my 60 is really 56.
I was re-reading this thread and it got me thinking again... the price break between a 155 and a 215 is about 2 grand, and sometimes less if you shop around.. My Riva stage II kit on my 215 was almost 3 grand not including the install. Your original post was about your 155, It would have been money well spent had you just picked the 215 over the 155 out of the gate if you were looking for a speed gain.
DC/Chicago
New Member
I have 2 2005 155 HP 4 tecs.They both go at about 50 MPH with about 450Lb crew(2 crew).I am about 200Lb and I can get up to 55-58 tops in flat water.My wife being much lighter is allways a bit faster .I am glad we all get about the same readings with stock engines
I just found this forum and this thread. I am glad I did. Bought a GTX 215 in July. Finally did the 10 hour break in opened her up. Only got 55 mph out of it with either me and wife, or just me on it. Top speed only 55. Called the dealer and he said it should only do 55-60 mph. Didn't believe him. Did a google on top speed which led me to this thread. I see here that I should be seeing at least 65 mph on the speedo which is what I thought. Thanks for the info.
I have a gps. Thought about checking it against speedo, but with everyone saying on their speedo they are seeing in the 65-70 mph range, I figure my speedo should be showing the same. I realize that actual speed with be a few mph slower on the gps, (2-5+?).
With 2/3 throttle all I get is 55. The last 1/3 of the throttle, there is no change. I will try to check it though.
With 2/3 throttle all I get is 55. The last 1/3 of the throttle, there is no change. I will try to check it though.
red2blue
New Member
At 2/3 throttle, you're seeing 8150?
No wonder you're not seeing any difference with the last 1/3 of your throttle....you're on the limiter, maybe.....the newer skis run higher I thought......Your oil level.....half way between the bends on a warmed up motor?....dealers are notorious for over-filling.
Now...how fast are you really going?.....I find it odd that your sc is slipping after only 10 hrs. You've checked your wear ring....prop.....pump....no debris?
No wonder you're not seeing any difference with the last 1/3 of your throttle....you're on the limiter, maybe.....the newer skis run higher I thought......Your oil level.....half way between the bends on a warmed up motor?....dealers are notorious for over-filling.
Now...how fast are you really going?.....I find it odd that your sc is slipping after only 10 hrs. You've checked your wear ring....prop.....pump....no debris?
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Impeller...
You could check out pump mods like a wedge or extension, along with an impeller upgrade. :cheers:
You could check out pump mods like a wedge or extension, along with an impeller upgrade. :cheers:
Do you have any links or companies I should check out first?
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