Thread: Does this sound right!!
05-05-2008, 09:15 AM #1
Does this sound right!!
I took out the rxt after adding a 4" rear intake, GH waterbox, Jims plate with skeggs - holes not filled yet, 160# thermostat, and i added 2mm to the 14/17r prop...still have the XS IC/injectors and Greenwheel to get..
didnt get good speed numbers due to the GPS was acting funny, but rpms were 8050/8100 and the one run i did get before the gps went out was 69.4 before the end of the run in slight chop, I was getting a constant 68 at 8150 before I added these, Shouldn't i be faster than I am??
boost number really didnt change at all, I thought the rear air would give me some extra...
riva 3" to rear 4" should equal about 100 rpms
waterbox should be a +100/150 over the riva thru hull
I dont know how much Jims plate would add..
Im confused and dissapointed..I thought it would be faster than it is...
05-05-2008, 09:26 AM #2
- Join Date
- Jul 2006
You kind of answered your own question... It does not take much chop to destroy your top speed #'s.. I can run 80+ all day then hit some chop and can not get over 75-76 mph.. Don't get frustrated, you should see the lake Riva test on, Glass and private, We all chase there #'s and what most don"t know is that there posted speeds are the best in perfect conditions with "Dr.'s of speed close by"
Keep trying, the speed will come!
05-05-2008, 10:13 AM #3
With your previous run, was it in colder air and water temps vs what you ran after the mods I know that the colder the water/air the faster you go. Perhaps that may be a factor. Could you please post pics of your rear air set up on your rxt. Thanks!
05-18-2008, 06:26 PM #4
finally got to test the RXT in some flat water..
with the addition of the 14/17 +2, greenbox, jims plate w/skeggs holes not filled in, and 4" rear intake..
the best i could get was 8040 and 69.9 with a full tank..before is listed in my sig
almost broke the 70 mark..
is this about right or am i missing some?? +1.2mph sounds low to me...
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