RXP C5 Monster Charger

[sikes101]

I have a stage 1 RXP and I am considering putting on the following parts

Shorty water box
Rear Exhaust
OPAS block off
Riva power cooler
R&D C5 monster charger
and 48lbs injectors

Can i run this setup with a stock ecu? get 42lbs injectors? what other parts would you recommend?

[caliburst]

I have a stage 1 RXP and I am considering putting on the following parts

Shorty water box
Rear Exhaust
OPAS block off
Riva power cooler
R&D C5 monster charger
and 48lbs injectors

Can i run this setup with a stock ecu? get 42lbs injectors? what other parts would you recommend?

I dont know anything about that particular SC.. but you can run up to 11psi or so on a stock ecu with 42# injectors and an RRFPR.

48s are good for up to 14psi or so on a stock ecu but at that point you will need to pull out fuel at idle and will have to go to a dual FPR setup.

I hope this helps...

[sikes101]

Thanks just the advice I needed, the charger kit runs about 11psi at 8000rpm and 13 at 8500, I live on an island so even with the stage one my RPM is only about 7900 tops. With this setup a RRFPR is a good idea?

[caliburst]

What are you trying to do? In other words- whats your goal?

IMO the best stock ecu setup in terms of price, performance and reliability is as follows:

4" intake, oem Rxp-x SC, XS intercooler, 15/20 prop, Riva exhaust, Riva grate and wedge, RE OPAS Block offs, 42# injectors, RRFPR, stock engine and ECU, rideplate holes filled.


We did this setup on my significant other's ski. Shes running a solid 76mph and the ski has plenty of acceleration. We did the build for around 1500 bucks give-or-take. the ski was already stage one when I bought it so.. 1500 beyond that, that is. The ski is probably making around 9psi.

[caliburst]

Thanks just the advice I needed, the charger kit runs about 11psi at 8000rpm and 13 at 8500, I live on an island so even with the stage one my RPM is only about 7900 tops. With this setup a RRFPR is a good idea?

that sounds similar to rude1. I ran 78.4 with a similar setup (11psi).

I built my rrfpr myself. You can PM me and I will give you all the details on it. An rrfpr is a MUST.

[sikes101]

I just want a good, fast setup out of the ski... and im bored and want something to work on :P

I will give you a PM then cause I dont know much about RRFPR

[caliburst]

Did you buy the SC yet? An X charger is a good inexpensive way to make power and its upgradable! Just something to think about.

The rrfpr (rising-rate fuel pressure regulator) is a must. Ill be glad to help you with it. Just PM me when youre ready.

[sikes101]

Havent purchased anything yet and PM sent

[dduck1628]

I have a stage 1 RXP and I am considering putting on the following parts

Shorty water box
Rear Exhaust
OPAS block off
Riva power cooler
R&D C5 monster charger
and 48lbs injectors

Can i run this setup with a stock ecu? get 42lbs injectors? what other parts would you recommend?

You may want to consider the X-Charger, it will perform the same as the C5 except you will have all the 08 SC internals and cost just a little more that the C5. Don't get me wrong, I ran the C5 last summer and loved it. But add the cost of the metal washers and a rebuild kit. The X-charger is a no brainer. Also if you decide to upgrade later you can get the mini rude kit. If cost is an issue, take a look at the Fizzle IC kit also. It's performs very well and the cost is much lower. I agree with the 42s and RRFPR. Set base fuel pressure to 60psi to start with. You will also need a 15/20 impeller. This will put you speed in the upper 70s. IMO this is a great combination.

[caliburst]

Yes. I didnt see that either the first time around. Buy an XS intercooler. Save a TON of money.

Like I said, the ski was stage1 when I bought it and the additional parts I posted above cost about $1500 give-or-take and we are running a strong 76 mph on that ski with a stock rideplate.
That setup will NOT disappoint you. And as we both said- you can upgrade to either the mini-rude or the ET-137 from engine-tech. If you go that route, you can keep the 42lb injectors- just repitch your prop and then dial in your fuel again and youre good-to-go.
The mini-rude will require 48s and at that point you may have to go with a dual regulator setup or your idle may be rough. *This is on a stock ecu that is.

Add a rideplate mod to the above setup and youll pick up another 1-1.5mph but you will lose your handling in the chop.