Does retarded WR timing really do anything good?
Posted March 11, 2003 - 09:13 AM
That said there is a very simple reason we compare our 520's to your little 450's, aside from the ISDE the two machines will almost always be raced against one another! Why shoot yourself in the foot twice once by buying a450 and one more time with a blue one! As far as that goes isn't the most common defense of that dog WR that it is so smooth and user friendly? If so then the KTM 450 much be a lot better in most of your books!
I'm sorry (not really) to disappoint you all but the new WR450's are dogs as far as drag race type power is concerned. I witnessed first hand one being out ran by a 02 YZ250f on multiple occasions! That is sad! I wish we would have run it against the 03 250f that was present to see how bad it would smoke it. Darrins 99 had no problem at all running with this 450 and edged it out a few times. 520 was in a different zip code by the time they got into 3rd gear! Not even a fair race looked like a geo metro facing off with a LS1 vette! I do agree with the WR's power being user friendly at least as long as the user doesn't want a trophy! Sorry that is just the facts of life!
Posted March 11, 2003 - 09:19 AM
Posted March 11, 2003 - 09:47 AM
With 3 posts, dont be suprised if someone steps in and declares you on the edge of trolldom. (Defination of a Troll - One that comes in a particular thread just to bash and harass)
BUT! - There is a lot of merit to what Karl has said, no one should put you in that category yet. So before everyone jumps up and starts pounding their keybord like a madman, keep in mind that I did stay even (with the 450) and like Karl said, even nudge out the WR450 on a couple of occassions. This is on a 5 year old 400!
We both weigh the same, got the same start and went through the gears at the same pace and never got more than a nats pecker away from each other.
Hey mabye it was the Wheel Collar Mod that done it for me!!! (minus the wheel collar of course )
The 450 is definatly a great ride but with 6 years under their belt on this bike, I would think Yamaha would have fared better.
Posted March 11, 2003 - 09:59 AM
I gotta say, this is putting a big smile on my face! I THOUGHT that my old 400 was as fast, if not a little quicker, than the two stocker 426's that I have ridden. Nothing that I could prove, but my bike 'felt' faster.
On another note, drag races, while fun, mean little.
(Except when I win, then they mean a lot! My buddies on XR250's FEAR ME! I bought them BajaDesigns headlight grills for Christmas so I would not feel bad about throwing rocks at them!)
Posted March 11, 2003 - 10:24 AM
The only fire I ever fought was when I had hemmoroids once.
Posted March 11, 2003 - 11:36 AM
Valve overlap and associated changes thereof does not drastically affect the RPM wherein a motor makes its power it does however have an effect on the amount of peak power and the breadth of the torque curve. In the case of the Yamahas, wr timing does in fact reduce the amount of power available at ALL rpm ranges and throttle openings. Show me a dyno report that shows differently and I'll eat my words!
Why is the burden of proof on us? Why don't YOU show us a dyno chart that proves your theory (because that is what it is, a theory, you don't know this to be the case).
I find it curious that you argue from the point of authority when you do not own either of these bikes. Has it ever occurred to you that the YZ has too much overlap? According to your theory more overlap is always better. That is silly.
Anyway, overlap is not all you have changed, the timing has changed also, and your theory fails to address this. But thanks for the insight all the same.
Posted March 11, 2003 - 12:25 PM
Oh yeah 3 posts and I think they have all been in this form, WR envy, looks like a bad case!
Posted March 11, 2003 - 12:36 PM
Posted March 11, 2003 - 01:02 PM
Sorry if I peaved any one outside of the realm of good hearted fun. I only wanted to help answer this question that I have heard asked a thousand times I dont have dyno data to back up my "theory" but I also dont look at my statement as a "Theory" I back it up with years of wasting my time finding these things out the hard way!
I appreciated your answer, it was insightful, if a little incomplete, and it made me think of some things I hadn't considered before.
But your statement is a theory, your years of experience are lost on us. This is the internet, and unless you have had the YZ and WR cams on a cam doctor or something you can only theorize about the amount of overlap that gives best output. And that is a fact.
Even if you did have a cam doctor you would have to make a lot of assumptions about the motor and valvetrain before you decided what cam profile was best. That is as much a black art as anything.
I'm not going to be seduced into believing that something as sloppy as changing the timing by an entire cam tooth is the path to nirvana and includes nothing in the way of a tradeoff. The best setup is probably somewhere between the YZ and WR spec. I had adjustable wheels on my YZ and w/ some help from a few guys here IMO I was able to improve upon them both.
Posted March 11, 2003 - 01:30 PM
Posted March 11, 2003 - 02:41 PM
As for Blackstar I have not been there. The wine business if fairly new around here but they are all over the place. Alot of well to do retiries from the big cities move to the area and start a winery. Couple of years ago the money was good in grapes but they may have overplanted. Pretty soon you will be able to pick up a winery cheap. Maybe put in a daily fee Motocross track.
Posted March 11, 2003 - 05:03 PM
Posted March 11, 2003 - 05:44 PM
as you say improved on the stock cam timing with adjustable sprockets you should have all the dyno data in the world so please enlighten us all and list your results.
What makes you think I have access to a dyno?
Further, what makes you think I care what any dyno says? The dyno isn't riding the bike, and dyno numbers matter very little for dirt bikes IMO. If RC's tuner knows a certain setup makes more power, but RC turns slower laps with this setup, is he going to argue with RC? Not if he wants to keep his job.
You were the one that brought dynos into this. I've tried different cam timing (exhaust and intake) on the 426, you have not. That doesn't mean I'm right and you are wrong, it just means I have more credibility.
Before you flame me I'll acknowledge that my credibility on the internet isn't going to help me at the races.
My only concern in this whole thing is to help my friends go faster.
Then forget about what any dyno says. My "long wheelie method" is a more robust means of determining what will make Moo go faster than any dyno.
Posted March 11, 2003 - 06:23 PM
Actually Im kinda enjoying it.
As long as it dosent get out of hand it joys me to see 2 gearheads go at it head to head. I wish I could chime in, but you guys are WAAAAAAAAAAAAY over my head.
If you wanna talk seal savers, or favorite tires or what goggle lens to wear for fogging, them Im your man! But all that tech talk about cams, and teeth, and backpressure and whatnot, I'll leave to you 2. Just keep it up, its very entertaining.
Now, on to the subject I have been avoiding.
Lord knows I still love my 400 to death. It has always been and still is a great ride. But this past weekend, I cheated on her and rode another. And I have to tell you, it felt gooood. The 520 worked for me very well, I just cant say enough about it.
OK, SO I LIKE THE 520!!!!
That dosent mean Im leaving the 400, ok?
Posted March 11, 2003 - 08:05 PM
You've worn out your welcome. Now, run along like a good little boy and annoy your teammates over on the orange message board.
Maybe they ride dynos and drag race and drink enough beer that you can convince them. It doesn't seem to be working very well here.
Your friend (as long as you leave),
Posted March 12, 2003 - 08:37 AM
As far as the whole dyno debate goes, I am fully aware that we don't race dynos, but if you want to measure the performance of an engine that is the only way to get accurate data. Way to many variables in the seat of my britches. Add to that someones preconcieved notions of what has changed and you have a recipe for inaccurate "feelings"
I might also add that drag racing is a good way to see the differences in an engines WOT output! That said I don't think I have had to drag race any one after the first turn in years, but that doesn't make the first turn unimportant!