|
Post by jasonp on May 9, 2013 22:27:04 GMT -6
After much research on this and looking at raptor 250cc heads and talking to CT racing as they have done a lot of R and D in this head, the warrior head is not much different and can be taken pretty far. I've cut one apart to actually look at the ports and see how much can be taken out. It's crazy how much material is left. Most porters do not know this. The info I'm going to give is known by very few. You can actually take the both ports valve guides right down to the port wall and cut the valve guide back. On a stock warrior head you will find that the valve guides stick way down into the port.
I'm going to leave this until a later date where I can give more detail.
|
|
|
Post by Goody's Atv on May 9, 2013 23:04:34 GMT -6
Badass, I always though of how the raptor 250 could help us with warrior development since they use similar heads
|
|
|
Post by DuneRacerWeston on May 10, 2013 12:02:02 GMT -6
Interesting, are you gonna use this on your computer program?
|
|
|
Post by gen1pat on May 10, 2013 16:53:22 GMT -6
Pics!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
|
Post by Lycan on May 12, 2013 16:30:59 GMT -6
Very interesting, I have always thought it strange that there's so much talk about how Badass the Rap 250 can be and not the warrior or Rap 350. I really wish someone would take the initiative to do something with these engines as obviously Yamaha has no plan for an engine update in the 350 platform.
|
|
|
Post by wv98yfm350 on May 15, 2013 8:39:25 GMT -6
I see yamahas point of view though. Why mess with a proven motor that is virtually indestructible with proper maintenance and minimal repair with interchangable parts for 21-26 years. However, on the other hand, I also think this is a great thread and am very interested to see what R&D can be learned and applied from it. Cool post Jason!
|
|
|
Post by gen1pat on May 16, 2013 20:59:30 GMT -6
I still wanna see this cut away pic!
|
|
|
Post by fourstroketech on Jun 15, 2013 6:38:38 GMT -6
Big ports don't always mean more HP on a Warrior/Raptor 350. Most of you don't have a big motor from what I have seen on here so far,maybe a few 400cc ,but if you want to try something different start off with a 350 Big Bear head and put the Warrior valves in it. You can open up the intake port a little to match the 36mm manifold. You will have higher compression because of the smaller chamber and higher velocity in the smaller ports.
The biggest mistake I see on porting the Warrior heads is people hogging out the ports,but more so then that they screw up the ex port so it flows less then stock because they don't know where to take metal out and where not to touch. The Warriors have a few different casting and some of the ex ports are so far off you just about have to leave them along or you mess them up big time.
|
|
|
Post by MudBug on Jun 15, 2013 10:19:50 GMT -6
Big ports don't always mean more HP on a Warrior/Raptor 350. Most of you don't have a big motor from what I have seen on here so far,maybe a few 400cc ,but if you want to try something different start off with a 350 Big Bear head and put the Warrior valves in it. You can open up the intake port a little to match the 36mm manifold. You will have higher compression because of the smaller chamber and higher velocity in the smaller ports. The biggest mistake I see on porting the Warrior heads is people hogging out the ports,but more so then that they screw up the ex port so it flows less then stock because they don't know where to take metal out and where not to touch. The Warriors have a few different casting and some of the ex ports are so far off you just about have to leave them along or you mess them up big time. Mickey, How do they big bear heads compare to a warrior head done correctly? Are you saying that a stock big bear head not ported has better flow then a ported Warrior head? I'm just trying to follow you. I'm also in the market for a good head here in the near future so I'm trying to learn my option.
|
|
|
Post by fourstroketech on Jun 15, 2013 10:46:28 GMT -6
Big ports don't always mean more HP on a Warrior/Raptor 350. Most of you don't have a big motor from what I have seen on here so far,maybe a few 400cc ,but if you want to try something different start off with a 350 Big Bear head and put the Warrior valves in it. You can open up the intake port a little to match the 36mm manifold. You will have higher compression because of the smaller chamber and higher velocity in the smaller ports. The biggest mistake I see on porting the Warrior heads is people hogging out the ports,but more so then that they screw up the ex port so it flows less then stock because they don't know where to take metal out and where not to touch. The Warriors have a few different casting and some of the ex ports are so far off you just about have to leave them along or you mess them up big time. Mickey, How do they big bear heads compare to a warrior head done correctly? Are you saying that a stock big bear head not ported has better flow then a ported Warrior head? I'm just trying to follow you. I'm also in the market for a good head here in the near future so I'm trying to learn my option. I can make the Big Bear head flow as much as the Warrior ported head but with smaller ports for the guys that don't have 400 plus cc motors to get the higher velocity. For the guy with a .040 Wiseco 10.25:1 piston,which is more like 9.75:1 you can bump it up to 11:1 because of the smaller chamber. I did this for Steve Johnson that worked at Wiseco a few years back. He really liked it over another guys Warrior he did with just their piston in it. I told them back then that's why they should build a higher compression piston.His reply was "we do,it's a FST 11:1". Back then I had a 84.5 and a 85mm piston kit.
|
|
|
Post by MudBug on Jun 15, 2013 10:55:16 GMT -6
So find a big bear head and send it to you, and have you do a piston.
|
|
|
Post by jasonp on Jun 15, 2013 11:04:54 GMT -6
Mickey, How do they big bear heads compare to a warrior head done correctly? Are you saying that a stock big bear head not ported has better flow then a ported Warrior head? I'm just trying to follow you. I'm also in the market for a good head here in the near future so I'm trying to learn my option. I can make the Big Bear head flow as much as the Warrior ported head but with smaller ports for the guys that don't have 400 plus cc motors to get the higher velocity. For the guy with a .040 Wiseco 10.25:1 piston,which is more like 9.75:1 you can bump it up to 11:1 because of the smaller chamber. I did this for Steve Johnson that worked at Wiseco a few years back. He really liked it over another guys Warrior he did with just their piston in it. I told them back then that's why they should build a higher compression piston.His reply was "we do,it's a FST 11:1". Back then I had a 84.5 and a 85mm piston kit. Hi Mickey, Do you know the measured chamber volume compared to a warrior head?
|
|
|
Post by fourstroketech on Jun 15, 2013 12:52:08 GMT -6
So find a big bear head and send it to you, and have you do a piston. I don't build pistons for just bore in's anymore,only 446cc strokers.
|
|
|
Post by MudBug on Jun 15, 2013 12:53:37 GMT -6
So find a big bear head and send it to you, and have you do a piston. I don't build pistons for just bore in's anymore,only 446cc strokers. Well what the heck! Hahaha wiesco it is then.
|
|
|
Post by fourstroketech on Jun 15, 2013 12:54:32 GMT -6
I can make the Big Bear head flow as much as the Warrior ported head but with smaller ports for the guys that don't have 400 plus cc motors to get the higher velocity. For the guy with a .040 Wiseco 10.25:1 piston,which is more like 9.75:1 you can bump it up to 11:1 because of the smaller chamber. I did this for Steve Johnson that worked at Wiseco a few years back. He really liked it over another guys Warrior he did with just their piston in it. I told them back then that's why they should build a higher compression piston.His reply was "we do,it's a FST 11:1". Back then I had a 84.5 and a 85mm piston kit. Hi Mickey, Do you know the measured chamber volume compared to a warrior head? It was years ago that I did some,can't recall other then what Steve said his was right at 11:1 with the .040 Wiseco.
|
|