| Author | Message | ||
     Hogs |
Okay guys I`m thinking this means 3 angles on the valves and two angles on the seats is this correct and the best bang for performance, and what are these angles if so..Thanks | ||
| Buellistic |
It is nice to have money !!! | ||
| Blake |
That's a new one for me too. But I'm pretty ignorant on the subject. My understanding was that a typical valve job like that included three facets each on the valves and on the seats. I bet they are talking about five facets on each, darn near a "blended" job it seems to me. Not 100% for sure, but I think most stage-3 valve jobs include blending where the stage two are a three facet (three angle) job. I could be wrong though. Pammy or Brian will know for sure. | ||
| Sarodude |
I know of some folks who have radiused cutters. Sortof an infinite angle valve job - with the exception being the 45 degree valve sealing surface. -Saro | ||
| Pammy |
Some people will call it a 5 angle valve job when in fact they will do 3 angles on the seat and 2 angles on the valve. Our 5 angle valve jobs are 5 angles on the seat. An intake port likes several sharp angles on the seat and the exhaust likes a soft radius on the seat. The valve angles depend on what the port requires. No need to guess any longer. Comparing apples to apples is paramount. | ||
| Revperf |
Yeah. What she said. | ||
| Hogs |
Okay..I always thought the guys I seen do valve jobs on the top fuelers Harleys That I worked along side with, did the 45 on the valves and seats where the valves and seat contact approx:,and also back cut the valves to 33 and 60 these figures are just approx: not sure on the exact back cuts as well as the two back cuts on the seats..! Lets the flow in and out smooth & fast, may be different on the top fuelers but wd. be the same principal I wd. Think...Maybe you guys mis understood what I meant... My buddy is down the Bahamas for a few months so I can`t pick their brains .:-) | ||
| Pammy |
Hogs, there is not one answer to the question on the valve angles. I was just replying to the meaning of '5 angle' valve job. The angles vary between porters. I know our cutters are proprietary. The 45 is the main cut(most common),then you have top cuts, above the 45 blending into the chamber, and bottom cuts below the 45 blending into the throat. In most race applications, a 50 or 55 is more common. So you see it depends on which brain you pick as to what the answer would be. (Message edited by pammy on February 15, 2006) | ||
| Pammy |
If I was the least bit computer saavy, I could post a photo of a typical cutter that we use. Our machine cuts multiple angles at one time. It took a lot of research to come up with the cutters we use. They are our own design and are made to our specifications. So what is typical for Cycle Rama, would not be typical for another porter. You notice I said they...we don't use the same one for every application. | ||
| Buellistic |
"RIGHT ON Pammy !!!" | ||
| Pammy |
An example of a high performance cutter for a hot rod car would be a 40/45/60/75/82. The 45 would be the main cut. Above the 45 would be the 40 transitioning into the chamber. Below the 45 would be the 60, followed by the 75, followed by the 82, transitioning into the throat. You see...5 cuts with one bit. Now this particular bit works well for this particular car guy in gaining his objective regarding flow in this particular head. As far as our bits...well if I told you, I'd have to kill you...it's like that.  As far as back cutting the valves. It helps low lift flow (in the intake). Every port design likes something different. For example, something that works great on a Buell/Sportster head, wouldn't necessarily work well on an S&S superstock head. Also, every head porter has his own technique and requirement.(I probably didn't word that right) (Message edited by pammy on February 15, 2006) | ||
| Buellistic |
If Pammy & Wes thats the way it is, it's good to go !!! | ||
| Blake |
Multi-faceted stuff.  | ||
| Hogs |
Hi Pammy, YEs I agree with ya 200 PERCENT on all that... Thats what I was getting at ,and like you said all use different angles for what they seem fit or have R&D... I was not sure what those angles were or what most use out there on the Buell heads...I know when we did em we have different angle cutters for each cut on the seats, and while the valves are done on a valve machine, maintaining the proper seating width..Guess this info falls into the Top Secert area only for those that have to know we all have to make $$$$ And I Sure don`T want ya to kill me LoL.. Thanks for all the input... | ||
| M1combat |
Would the cut on the valve seat be the 45 in that application mentioned above or would you cut it at say 43-44 or 46-47 to get a sharp point of seal? If so, I assume you would want that point of contact to be closer to the chamber as opposed to closer to the port (which would put it a few degrees above 45). Or does cutting both the valve and seat at 45 (in that application) make the best seal? BTW... That X1 at the dyno shootout sounded BRILLIANT. It made my nipples hard... I swear  . I know, I know... TMI. (Message edited by M1Combat on March 16, 2006) |
