new 2003 and looking for power

armymike33 · 10-18-2009, 8:43 AM

I just bought my first rc51 its a 2003. Im looking to make inbetween 150 to 180 hp at the rear wheel any segustions. I do not want to do a turbo or nos I have a power comder3 and santo exaust what next?

roland5color · 10-18-2009, 9:43 AM

150-180 hp at the rear wheel out of a RC51

. Your going to need lots of cash and your own HRC team to keep it running.

Even if you can get that much HP out of RC51 I don't think it will last long before it needs a rebuild. Good luck hope someone can help you out with your quest for HP.

beadrunner · 10-19-2009, 1:02 PM

Trade it for a cbr1000rr

armymike33 · 10-19-2009, 1:11 PM

if i wanted a cbr i would have bought one smart as* thanks for waisting my time

jeffro17 · 10-19-2009, 2:58 PM

JohnnySpeed954 · 10-19-2009, 3:51 PM

Quote:

Originally Posted by armymike33

I just bought my first rc51 its a 2003. Im looking to make inbetween 150 to 180 hp at the rear wheel any segustions. I do not want to do a turbo or nos I have a power comder3 and santo exaust what next?

1) You're looking for a TON of power out a TWIN ... prolly not going to get that much out of it. I mean you are looking for inline 4 power from a massive 2 cylinder bike. Thats not even counting the fat big nature of the RC51!

2) Contact KWS motors. They have a lot of different motor packages to beef up just about any bike. Prices are pretty good too. If you want REAL RC51 performance though ... get in touch with Dan Kyle in California ... he's the best of the best on an RC51!!

3) If you do go with KWS or anyone else for that matter for a big engine project like this a previous statement made still holds true. 100% fully ecpect to be doing engine tear down and refresh at LEAST once a season if not more.

In my personal opinion if you are looking for that kind of solid RWHP you should getting an inline 4 liter bike.

Good luck!

Fluffycat · 10-19-2009, 4:47 PM

Quote:

Originally Posted by JohnnySpeed954

1)

In my personal opinion if you are looking for that kind of solid RWHP you should getting an inline 4 liter bike.

Good luck!

Be careful dude you may be wasting his time

JohnnySpeed954 · 10-19-2009, 4:54 PM

Quote:

Originally Posted by Fluffycat

Be careful dude you may be wasting his time

You're prolly right ... can I have the 1 min 30 sec. of my life that it took to write that informative post back please?

No I don't have a reciept!!

Twincam · 10-19-2009, 6:20 PM

Have you had her on a dyno and got the correct map for the exhaust? Is it a full system or just the cans?

KDA · 10-19-2009, 6:46 PM

It seems RC's make maybe 125 hp so 150 I would think is possible without too much headache. 180 is probably another story. I think I remember reading that HRC offered some performance parts such as higher compression pistons, cams etc to help get some more power from the RC. I would guess Dan Kyle at Kyle Racing - Roadracing Motorcycles may be a good source. I'm sure he can tell you what combinations will yield what power and can give you some idea of what is possible within reason. Mine is fast enough for me stock other than slip-ons and PC. But if you want to hang with newer 1000's I'm sure some amount of money can get you closer.

Twincam · 10-19-2009, 6:52 PM

How much money have you to spend on your bike?

If you want to go far, you will have to do some serious engine work... The simplest and cheapest will be to get a turbo.

jrivas · 10-20-2009, 3:07 PM

now now people, the man just asked for some legitimate help, hey and if you have the money, hell i would be asking the same question!! look at mr cbr400, the man more than likely has the money, and it shows!! good luck armymike, and keep us posted

Twincam · 10-20-2009, 5:10 PM

Quote:

Originally Posted by jrivas

now now people, the man just asked for some legitimate help, hey and if you have the money, hell i would be asking the same question!! look at mr cbr400, the man more than likely has the money, and it shows!! good luck armymike, and keep us posted

I still think going down the turbo route would be the best option for you, its less messy and is probably a cheaper option (depending if money is no object for you)

jrivas · 10-20-2009, 7:33 PM

im with twin!! ( again )

Maholli · 10-20-2009, 8:24 PM

Check out CBR400RR's RC51 it's probally the baddest one I seen on this site and it probally the most modded out and he has done extensive engine work and his rwhp is around 140.. It might give u some ideas..

My 2004 Honda RC51

nicknitro71 · 10-21-2009, 9:20 AM

You seem to fail to understand that HP is a virtual measure. To get that much HP you need to have the engine spin way past 10.5K...and to get a twin to spin 14-16K well, good luck and let us know the outcome.

Riding a twin is not about HP, it's about usable torque, it seems you bought the wrong bike.

beadrunner · 10-21-2009, 1:15 PM

Quote:

Originally Posted by beadrunner

Trade it for a cbr1000rr

I wasn't trying to be a smartass (well ok I was) It was just an easy way of saying it will be hard. If you take your engine ( and a blank check or a envelope with $5000 to $10,000) to a good engine builder. I'm sure 180 is possible

KDA · 10-21-2009, 2:23 PM

Quote:

Originally Posted by nicknitro71

You seem to fail to understand that HP is a virtual measure. To get that much HP you need to have the engine spin way past 10.5K...and to get a twin to spin 14-16K well, good luck and let us know the outcome.

Riding a twin is not about HP, it's about usable torque, it seems you bought the wrong bike.

Doen't need to spin that fast if you produce enough torque at high enough rpm. 75 foot lbs at 10,500 rpm equals 150hp. Need to move the torque curve up the rpm range a lot.

roland5color · 10-21-2009, 3:31 PM

Quote:

Originally Posted by beadrunner

I wasn't trying to be a smartass (well ok I was) It was just an easy way of saying it will be hard. If you take your engine ( and a blank check or a envelope with $5000 to $10,000) to a good engine builder. I'm sure 180 is possible

Then he will need a another envelope to rebuild it when it grenades. When the RC51 was being raced I believe it made around 175-180hp and had to be rebuilt after every race. 180hp on all motor out of a RC51 is not going to last. I dont care who builds it. Unless he rides it like a scooter then maybe it will have a chance.

Twincam · 10-21-2009, 4:05 PM

The higher the power range you take your engine into, the less reliability you will have.

That being said, an extra 10BHP shouldn't really hurt (you may have to run the turbo at a smaller boost level or you could start breaking things)

DeathsStalker · 10-21-2009, 6:12 PM

Quote:

Originally Posted by Twincam

The higher the power range you take your engine into, the less reliability you will have.

That being said, an extra 10BHP shouldn't really hurt (you may have to run the turbo at a smaller boost level or you could start breaking things)

True, My RS250 would spin up to 13,600 and would use up parts like crazy. When we dyno'ed (they were rare back then 1989...I'm old) we found it made the most HP at 12,200 I shifted at 12,500 to keep it in the power band (didn't have power shifters either) and the piston etc lasted a lot longer.

I seem to remember from my Honda Racing days the RC engine etc kit was around $50,000.00 and those were not the "factory" kits that you couldn't buy. Sorry I can't remember the detail being a GP guy I tuned out when the guys started talking about hopped up street bikes. (then I go buy one lol)

zerogara · 10-22-2009, 5:52 PM

It is funny some of us 2smokers get to meet in weird places

Were you getting about 60hp out of the RS back then? Did it weigh more than 250lb?
I have still my RG500, looks like a mid-90s sport bike, weighs about 365lb ready to cruise (not for very far) with the jetting and piping, but I couldn't care less about hp any more, or where it is hiding and when to shift. This diesel RC thing is fun too.

roland5color · 10-22-2009, 6:48 PM

Quote:

Originally Posted by Twincam

The higher the power range you take your engine into, the less reliability you will have.

That being said, an extra 10BHP shouldn't really hurt (you may have to run the turbo at a smaller boost level or you could start breaking things)

He said he didnt want to use a turbo though.

Twincam · 10-22-2009, 6:57 PM

Quote:

Originally Posted by roland5color

He said he didnt want to use a turbo though.

Yup, but without spending big bucks I'm not sure what will achieve the goal he wishes to reach apart from a Turbo.

SubSailor · 10-22-2009, 7:26 PM

Quote:

Originally Posted by armymike33

I just bought my first rc51 its a 2003. Im looking to make inbetween 150 to 180 hp at the rear wheel any segustions. I do not want to do a turbo or nos I have a power comder3 and santo exaust what next?

The quick and dirty answer is, you won't get that kind of reliable power from an RC51.
The WSBK RC51's had 185 HP at the rear wheel and needed engine rebuilds every 3500 Km (they turned to 12K RPM for one reason why).
The Ducati's were also turning to 13K RPM's and needed their own rebuilds.
I'd say you might be able to get 145 HP reliably from the engine.

About the only twins that get that kind of street HP are Ducati 1198r and KTM RC8R. And be prepared to spend about $45K+ for those. Sorry.
Otherwise a 1000cc I-4 is your economic best bet.

jrivas · 10-22-2009, 8:48 PM

yo armymike......tell us what you think, whats the plan after this?? kinda curious..............holler back

beadrunner · 10-22-2009, 10:26 PM

Niromethane How about a top fuel rc

DeathsStalker · 10-22-2009, 10:30 PM

Quote:

Originally Posted by zerogara

It is funny some of us 2smokers get to meet in weird places

Were you getting about 60hp out of the RS back then? Did it weigh more than 250lb?
I have still my RG500, looks like a mid-90s sport bike, weighs about 365lb ready to cruise (not for very far) with the jetting and piping, but I couldn't care less about hp any more, or where it is hiding and when to shift. This diesel RC thing is fun too.

We got 57 hp (rear Wheel) on a very tired engine, with pump gas at the end of the season. I had a bunch of parts so my RS weighed in at around 230 pounds, too bad I was 6' 200 pound but with my HRC engine nobody ever passed me on a straight. I watched some video of me racing and I was pulling 10 bike lengths on long straights on everyone else. (it must have soo sucked for the faster guys when I got a great start since it would take about 10 laps to pass me)
I had a RG500 too...My RS250 was needed less work lol. I was always working on those carb to stop them from over flowing and filling my belly pan with gas!

I have to admit I've had 750, 1000 and VFR Interceptors, RG etc and the RC51 is the only diesel that comes close to my RS for shear fun...... I think its a keeper.

roland5color · 10-23-2009, 9:41 AM

Quote:

Originally Posted by SubSailor

The quick and dirty answer is, you won't get that kind of reliable power from an RC51.
The WSBK RC51's had 185 HP at the rear wheel and needed engine rebuilds every 3500 Km (they turned to 12K RPM for one reason why).
The Ducati's were also turning to 13K RPM's and needed their own rebuilds.
I'd say you might be able to get 145 HP reliably from the engine.

About the only twins that get that kind of street HP are Ducati 1198r and KTM RC8R. And be prepared to spend about $45K+ for those. Sorry.
Otherwise a 1000cc I-4 is your economic best bet.

This is what I have been saying since this thread started.

zerogara · 10-23-2009, 9:57 AM

I wonder why you guys even bother with this! The initial request for a single answer could have told you enough! Like if there is a cheap kit or additive that gives 25% power increase to something that is already very high tech!

Then the second and last post to this is the following:

Quote:

Originally Posted by armymike33

if i wanted a cbr i would have bought one smart as* thanks for waisting my time

So, people, stop WAISTing his time!