Thread: Riva 2008 Rxp-x 255 Stage II Kit
06-24-2008, 01:11 PM #1
Riva 2008 Rxp-x 255 Stage II KitRIVA 2008 RXP-X 255 STAGE II KIT
Kit Part # RS-RPM-RXPX-2
Stock 68 MPH @ 8,000RPM
Description Quantity Part No.
RIVA Performance Power Filter Kit 1
OEM Intercooler Upgrade Kit 1
OEM Intake Manifold Upgrade Kit 1
Rear Exhaust Kit 1
Fuel Injector Kit (50lb) 1
Valve Train Upgrade Kit 1
Thermostat Kit 1
RIVA Top-Loader Intake Grate 1
RIVA 2 Pump Wedge 1
RIVA VTS Extension Rod 1
RIVA Pro-Series Reduction Nozzle 1
Riva Sponson Kit 1 RS26050
Last edited by tottii; 06-24-2008 at 03:37 PM.
06-24-2008, 01:40 PM #2
06-24-2008, 02:05 PM #3
Well if there is going to be a new ECU, I am going to have to guess and say it's going to be fast haha. I have no clue, maybe low 80s? People are seeing 74-75 with mild stage 1's.
06-24-2008, 02:44 PM #4
I wonder what is the OEM Intercooler Upgrade Kit? Will be nice to see the results. 80+??????
06-24-2008, 02:48 PM #5
06-24-2008, 03:02 PM #6
Last edited by phoenixcustoms; 06-24-2008 at 03:04 PM.
06-24-2008, 03:04 PM #7
- Join Date
- Mar 2008
If you look at the Riva forum, they say the kit is ready, but waiting to resolve overstuffing.
06-24-2008, 03:10 PM #8
ok I take some of that back......
Quote RIVA forums
We appreciate the support and interest. Out Stage II Kit for the RXP-X is basically ready. However, we are not ready to release it yet. This is due to the pump overstuff phenomenon that occurs at speeds at or above 77mph (RXP-X only). The rear of the craft lifts suddenly causing it to turn sharply and violently. We're close to a resolution and hope to be able to release our kit soon.
In the meantime you can safely and confidently install our Stage I Kit as well as the Optional Upgrades listed at the end of the web page outlining the kit.
At Mud Bug (last weekend) our Stage I RXP-X ran a solid 75.6mph with the following additions:
Pro-Series Power Filter Kit
Intake Manifold Upgrade Kit
Pro-Series OPAS Block-off Kit
Pro-Series Sponson Kit
Intercooler Updgrade Kit (coming soon!)
Welcome to our forums mr F! I can't say exactly what top speed you can expect as our RXP-X had one additional part I forgot list initially, but have since added to the list. We haven't tested without the Intercooler Upgrade Kit. If I had to guess I'd say you can expect to be within 1~2mph of our RXP-X at sea level.
Everything above except for the Pro-Series Power Filter Kit will be part of Stage II as well as a few other items. Stage II will retain the Performance Power Filter Kit and require a different pump impeller from the Stage I Kit 15/22R.
Once the kit is nailed down I will post a list of the parts as well as performance data.
06-24-2008, 03:29 PM #9
most if these items are available now
instead of some items such as
OEM Intercooler Upgrade Kit
Impeller should different size or brand than solas
only these things are not available
06-24-2008, 04:13 PM #10
OEM Intercooler upgrade kit?
I hope this is a new intercooler setup instead of just a relocation kit. Would love to know more info on this OEM intercooler upgrade kit.
I hope Riva is going to release something like Bruce is using for the GPR-SHO conversion but for the RXP-X.(see picture below)----A manifold intercooler kit for the RXP like this would rock.
Please release something like this soon
Last edited by Enufpwr; 06-24-2008 at 04:24 PM.
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