I have posted this before put never got a good answer from anyone, cam may be too new. I wonder if you kindly folks could respone to this, I would greatly appreicate it. Has anyone installed this cam in thier BONE STOCK RAPTOR? How is the performance and did you get 9-13 Hp increase? Any problems? Thanks folks!

 

Okay, mine is not bone stock, but I did install it in my Raptor. And I believe it is more like 9-13% more torque, not horsepower. That HP gain is impossible!

Just thought I would throw that out...

 

I agree TOID! Either you (PULL) read HotCams claim incorrectly or they are blowing smoke up your AZZ! If they do claim this, maybe they are in Kahoots with CT. haha

Even a 13% increase in torque is ALOT to ask for with just a cam!

 

This may be of interest to you. Its an email I wrote to and recieved from Hotcams.


Hi David,

Our cams have only been tested with stock machines. We want to be able to drop the cams in and go with as little effort and hassle as possible. The Raptor Stage 2 cam is the exception to the rule, requiring a spring kit and possible machine work to the top of the center intake valve guide.

You can expect between 10% and 13% gain in midrange performance. The Stage 1 cam works better everywhere but is biased more toward the middle rpm range, 2500-6000 rpm, where most trail riders spend their time. The reason you have spread in power gains is because it depends on how well maintained your engine is. The one thing I would STRONGLY suggest is to make sure the rocker arm wear pads have absolutely no wear. If you can see a line in the rockers' wear pads, get new rocker arms.

As far as fuel goes, 91-93 octane fuel is OK but, we'd like to see you use a little better fuel to get the most out of the cam as possible. Always use a station that sales a lot of fuel to get the freshest fuel possible. And, please, stay away from oxygenated fuels if possible. Don't use fuels with higher than 105 octane levels, unless you're going to a higher compression ratio.

Thank you for considering Hot Cams.

Tony Tice
(515) 402 - 8000 Ext 104
-----Original Message-----
From: Wshrdskin@aol.com [mailto:Wshrdskin@aol.com]
Sent: Monday, July 22, 2002 7:12 PM
To: support@hotcamsinc.com
Subject: Your Raptor Cams


Are your Raptor cams designed to work with the Raptors stock piston? If so, what kind of gains could be expected? What type fuel is required to run with it? If not, what types pistons do you reccomend? What types fuel etc.

Thanks, David

 

Hey guys this is a E-mail I received from HOTCAMS Inc: NOTICE Hp gain!!
Hi Joe,

We would like to oblige you on your request to give out a power curve but, we don't do that because if you get something different than we do, and believe me you will because no two dynos are set-up exactly alike, I can't give you the power numbers.

I can give you a percentage of increase though and the approximate rpm they will be of greatest effect. We do all our testing on strictly stock machines, with no other mods. The Raptor stage 1 Camshaft gave approx. a 11-13 percent increase in torque and hp from 2500 rpm to 6500 rpm and 9-11 percent above 6500 rpm to 9000 rpm. And all this is going to vary on how the machine is set-up and the dyno you are using. We happen to use a SuperFlow and it sometimes reads much lower than say a Dyno Jet or some of the others.

To summarize, the YFM660R cams, both Stage 1 and 2, work excellently with good power spread and delivery. These are "Billet" camshafts, meaning new cams from cast blanks. These are not hard welds or reground cams, and no core charge is necessary. They come coated with a dry phosphate covering to assist during the break-in period. And they come with all the appropriate openings for the auto decompressor.

Thank you for considering Hot Cams.

Tony Tice
(515) 402 - 8000 Ext 104

 

Thats still not a 9-13 hp gain as you previously posted. Its 3.85-4.55 hp gain figuring a stock Raptor is at 35 HP to start with. Thats 35x11%=3.85 gain etc.

Which IMO, for the money its worth it for a 4hp gain.

 

WE have seen a 2 hp gain with a cam only. This was on a dyno-jet.

 

i heard they ont last very long.

You likely heard that from someone that stood to profit from your not purchasing one.

I'd like to hear the reasoning - they are no different than an OEM cam --- in fact, if I remember right, I believe they are the OEM camshaft maker for some of the manufacturers.

If I were an aftermarket cam grinder that's been overcharging for years for reground cams, I'd be nervous too.

 

1986,

You hit the nail on the head. When you can buy a 350 Chevy cam for $80.00 and ATV Cam for $200.00 something is way wrong. Please don't talk to me about scale, units, all the other crap. I already know about it. Yes you won't sale as many ATV as small block chevy's but the cost of the cam grinder is fixed, the material is less, the time on machine is less, everythng is less.

Smitty

 

The hard face welded and reground cams generaly will out last even an OEM cam. I have no problem with them and even for cars there are a lot of them out there. The prices are too high for ATV cams but you have to face it, volume is the big factor and demand. What percentage of the atv owners ever put in an after market cam with the exception of people on this forum? The numbers are not that great as a whole. Hot cams look like they have some good specs on their cams and I plan on trying one in the future after I talk to Hot Cams. I want to see what the resoning is behind their recomendation for stock engines.