Results 1 to 10 of 10
  1. #1
    RXP 260 X Short Course Veteran RXP244's Avatar
    Join Date
    May 2007
    Location
    Auckland, New Zealand, New Zealand
    Posts
    1,287
    +1
    112

    Rxp/Rxt 300 Prop running in 260

    I have just installed a untouched OEM RXT/RXP 300 prop into my 260.

    Was running 81mph with a Skat 14/18 3 blade at 9000rpm. Have been running that prop for a long time. It was pulling 8800rpm when it had ET68/137 + 4 and a Cam. It now has a ET70/146 and is pulling just over 9k. But now with the 14/18 it's just spinning the prop under acceleration and not going any faster top end.

    Given that a stock Rxt/Rxp 300 is pitched at 13.5/24 I should get pretty good acceleration and in theory a higher top speed at lower rpm. Provided it can spin it.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	20200519_144258.jpg 
Views:	63 
Size:	51.6 KB 
ID:	461890   Click image for larger version. 

Name:	20200519_144214.jpg 
Views:	62 
Size:	71.6 KB 
ID:	461891   Click image for larger version. 

Name:	20200519_144200.jpg 
Views:	54 
Size:	75.6 KB 
ID:	461892  

  2. #2
    RXP 260 X Short Course Veteran RXP244's Avatar
    Join Date
    May 2007
    Location
    Auckland, New Zealand, New Zealand
    Posts
    1,287
    +1
    112
    Anyone spun the stock 300 prop in an rxp up to 9000rpm?

  3. #3
    RXP 260 X Short Course Veteran RXP244's Avatar
    Join Date
    May 2007
    Location
    Auckland, New Zealand, New Zealand
    Posts
    1,287
    +1
    112
    First ride out with the oem 300 prop in my 260 and it's way to tall. Great acceleration, from a standstill start it launches out of the water like a little ski, even with the trim down. That's cool.

    But top end rpm down to around 8250rpm and speed down to about 75 mph. That's not cool.

    Will depitch the trailing edge and try again.

  4. #4
    RXP 260 X Short Course Veteran RXP244's Avatar
    Join Date
    May 2007
    Location
    Auckland, New Zealand, New Zealand
    Posts
    1,287
    +1
    112
    Took 4.5mm out of the trailing edge and pulled the rpm back upto 8750-8800. Accel is still awesome and it grunts out of hard corners. Top speed is back. Rolling acceleration is insane.

  5. #5
    Kosh's Avatar
    Join Date
    Sep 2007
    Location
    Australia
    Posts
    1,562
    +1
    92
    Great information, would seem this is a possible upgrade for most high power 1500cc versions.

  6. #6
    ptscon's Avatar
    Join Date
    Jul 2013
    Location
    Toronto
    Posts
    4,319
    +1
    926
    Quote Originally Posted by RXP244 View Post
    Took 4.5mm out of the trailing edge and pulled the rpm back upto 8750-8800. Accel is still awesome and it grunts out of hard corners. Top speed is back. Rolling acceleration is insane.

    What speed are you seeing at that RPM -4.5 mm?

  7. #7

    Join Date
    May 2010
    Location
    Jax,FL
    Posts
    4,877
    +1
    995
    Quote Originally Posted by ptscon View Post
    What speed are you seeing at that RPM -4.5 mm?
    for reference I see 82-83 dash at 8750rpm, full tank gas, bone stock impeller. Im done about 100rpm and I suspect the next time I ride Ill be down another 100rpm...damn FL heat

  8. #8
    RXP 260 X Short Course Veteran RXP244's Avatar
    Join Date
    May 2007
    Location
    Auckland, New Zealand, New Zealand
    Posts
    1,287
    +1
    112
    Quote Originally Posted by ptscon View Post
    What speed are you seeing at that RPM -4.5 mm?
    Back to 80-81mph. Wasn't the top speed I was chasing really. Just wanted the 300 acceleration with out spinning the 159 prop out of the hole. Pretty happy with it. Mid range acceleration is amazing. But I am running a 70-146et charger.

  9. #9
    RXP 260 X Short Course Veteran RXP244's Avatar
    Join Date
    May 2007
    Location
    Auckland, New Zealand, New Zealand
    Posts
    1,287
    +1
    112
    When I rode a 2019 300 Rxp I was amazed at the stock performance and had a feeling I could make a 300 prop work.

  10. #10
    RXP 260 X Short Course Veteran RXP244's Avatar
    Join Date
    May 2007
    Location
    Auckland, New Zealand, New Zealand
    Posts
    1,287
    +1
    112
    Quote Originally Posted by Kosh View Post
    Great information, would seem this is a possible upgrade for most high power 1500cc versions.
    I thought so.


Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. RXT-X 300 Intercooler for RXP-X 260
    By russ_young in forum 4-Tec Performance
    Replies: 7
    Last Post: 04-15-2017, 08:01 AM
  2. Replies: 68
    Last Post: 09-10-2016, 05:15 AM
  3. Anyone try 300 prop in a 260 yet?
    By Robert 2000 in forum 4-Tec Performance
    Replies: 11
    Last Post: 04-25-2016, 10:35 PM
  4. oem rxt 260 prop on rxpx 260?
    By alan1967 in forum 4-Tec Performance
    Replies: 1
    Last Post: 06-09-2014, 10:58 AM
  5. Fzr/Rxt-x as 260-Rxp 255-Ultra 300
    By WaterCowboy in forum Open Discussion
    Replies: 8
    Last Post: 08-20-2011, 03:13 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •