Riva s3 vs. Rude

[ARNYGOLLOTT3]

Obviously we all know the Rude is much better, I would like to know what boost each supercharger ypically puts out at 8100 rpm....with riva rear air and xs intercooler...I realize that an ECU is needed to gain their full potential but I am curious about 8100 rpm boost...could 80 mph be acheived without an ECU?

[Alex13]

Obviously we all know the Rude is much better, I would like to know what boost each supercharger ypically puts out at 8100 rpm....with riva rear air and xs intercooler...I realize that an ECU is needed to gain their full potential but I am curious about 8100 rpm boost...could 80 mph be acheived without an ECU?

That's funny! I played hell to get my RXP to 80 with all the goodies. 80 is a big # without being able to hit the higher RPM's!!

[The Bandit]

could 80 mph be acheived without an ECU?

With a Rude and cool air, it would be real close.

[engineermike]

...could 80 mph be acheived without an ECU?

Your answer lies here:

http://www.greenhulk.net/forums/showthread.php?t=32383

RXP244 went 79.7 with the stock ECU.

I'm trying to see how fast you can go with the stock intercooler, ECM, and injectors. . . 74.0 so far.

I'd personally like to know how much boost all of them make at 8100 rpm, including the Les Cooke wheels, Rude charger, Riva S2 and S3, and Rotax variants.

Mike

[Green Hulk]

The fastest i have ever gone with a stock ECU was 78.8
That was with a B kit SC

engineermike, here are some approx figures for you

On an engine running 8100 RPM's
stock SC 6.5
Riva Vortech 8
Rotax Racing 9+
Les Cooke A kit 9+
Green Charger 9+
Riva stage 3 11
Rude Charger 12.5++

hope that helps!

[sleeplessnMS]

Just go ahead & break out the plastic!!!

Ya need
~Rude charger~
~Rotax Racing ECU~
~Riva valve train kit~
~15/20 4 blade otb~
JUST DO IT!!!!!!!!!!!!!

[RXP-REX]

The fastest i have ever gone with a stock ECU was 78.8
That was with a B kit SC

engineermike, here are some approx figures for you

On an engine running 8100 RPM's
stock SC 6.5
Riva Vortech 8
Rotax Racing 9+
Les Cooke A kit 9+
Green Charger 9+
Riva stage 3 11
Rude Charger 12.5++

hope that helps!

Really Jerry, I thought the Riva S3 SC put out 11+ psi with an AM ECU? This is at 8100 though? Damn, that is pretty close to the Rude. For the price difference I think I may go S3 SC next year then.

[engineermike]

On an engine running 8100 RPM's
stock SC 6.5
Riva Vortech 8
Rotax Racing 9+
Les Cooke A kit 9+
Green Charger 9+
Riva stage 3 11
Rude Charger 12.5++

That's great info!

Where do the B-kit and the new RR/spacer fall out?

From searching and some math, I'm getting that the RR/spacer is about 11 and the B-kit about 11 also?

Mike

[gtxscrider]

If the stage 3 sc puts out 11psi at 8100rpm what do you think it will put out my gtx rev limit of 7600rpm?

[ARNYGOLLOTT3]

Yes, where do the B kit and new RR 'spacer' wheel fit in at 8100 RPMs