cool.. It has a really nice velocity profile as well.CamKing wrote:Thanks, I just stapled it to the wall, above my desk.
PS.. It comes in iron also!
Moderator: Team
cool.. It has a really nice velocity profile as well.CamKing wrote:Thanks, I just stapled it to the wall, above my desk.
Chad,cspeier wrote: Here is a pdf of a set I just did last week. Just a valve job and a little blending.
http://www.speierracingheads.com/v2.72_flow.pdf
it's probably wrong.. But in my defense, I "know" how it effects the numbers.. Different sized stems and such...Stan Weiss wrote:Chad,cspeier wrote: Here is a pdf of a set I just did last week. Just a valve job and a little blending.
http://www.speierracingheads.com/v2.72_flow.pdf
I have to ask because I see many people do it this way. Why when you calculate the throat velocity do you not remove the valve stem csa?
Stan
Chad,cspeier wrote:it's probably wrong.. But in my defense, I "know" how it effects the numbers.. Different sized stems and such...Stan Weiss wrote:Chad,cspeier wrote: Here is a pdf of a set I just did last week. Just a valve job and a little blending.
http://www.speierracingheads.com/v2.72_flow.pdf
I have to ask because I see many people do it this way. Why when you calculate the throat velocity do you not remove the valve stem csa?
Stan
I should probably rework my spreadsheet. I'm just not smart enough to do it. Do you wanna? I'd pay you..
Of course it all makes sense,great getting up to speed and feeling better all the time about getting what I'm looking for.Once all the parts are here polished,clearanced,balanced and assembled it will be a joy dailing it in.Finding this forum hearing what you guys are saying sure takes the pressure off.Guess it's time to arcive my old books since thay are just a little outdated.cspeier wrote:Yea, you've been away too long! The port will only flow what is let through the minimum CSA, wherever that might be. I agree, it should be the seat ring. A 85% seat is really small. Even my street heads are 90%+..
Been away from it too long I guess.Always was led to believe that a port will only flow what is let through the seat,and was taught the 85% rule.Make the seat opening at least 85% of the valve diameter,always figured that the pinch area was not a big deal.Obviously I do not play with a flow bench,sure would like to! Honestly the flow numbers are interesting and I will always enjoy talking about technical side,bottom line is I need a topend that will give me the big number or very close to it and on street gas.Because this motor will be in a motorcycle torque is not a big deal.Will insist on instant throttle response don't we all.
i saw one mag article of a 434 , 18 degree heads , small roller , 252/260 on a 110 ,, it got over 700 hp on pump gasbigjoe1 wrote:The alu block is NOT a good idea, I have had several really BAD results. Just get a Dart iron block, 434 crank assembly, some AFR 245 heads, and you can make 750 HP on pump gas. On serious race builds, I am seeing very close to 900 HP with the same AFR 245 heads and a lot of trick parts to go along with them. Do not waste your money on the alu block.
JOE SHERMAN RACING ENGINES
Sure would like to know more about this one,just to get some ideas.levisnteeshirt wrote:i saw one mag article of a 434 , 18 degree heads , small roller , 252/260 on a 110 ,, it got over 700 hp on pump gasbigjoe1 wrote:The alu block is NOT a good idea, I have had several really BAD results. Just get a Dart iron block, 434 crank assembly, some AFR 245 heads, and you can make 750 HP on pump gas. On serious race builds, I am seeing very close to 900 HP with the same AFR 245 heads and a lot of trick parts to go along with them. Do not waste your money on the alu block.
JOE SHERMAN RACING ENGINES
Chad, you are welcome.cspeier wrote:Want to thank Stan for hooking me up with an updated spreadsheet! Very cool of him!
THANKS
Exactly why I for one am using a site like this.Been building engines most all my adult life, since the 60's.An aweful lot of old school still lurking around the grey matter which by the way has served me very well.Getting these motors into the 1.8 to 2.0 or more hp per ci be streetable and reliable,makes the need to know more a requirement.Mike RossStan Weiss wrote:Chad, you are welcome.cspeier wrote:Want to thank Stan for hooking me up with an updated spreadsheet! Very cool of him!
THANKS
I would like to believe that why most of us are here is to share knowledge and help others out when we can.
Stan
What issues have you had with aluminum blocks????TBbigjoe1 wrote:The alu block is NOT a good idea, I have had several really BAD results. Just get a Dart iron block, 434 crank assembly, some AFR 245 heads, and you can make 750 HP on pump gas. On serious race builds, I am seeing very close to 900 HP with the same AFR 245 heads and a lot of trick parts to go along with them. Do not waste your money on the alu block.
JOE SHERMAN RACING ENGINES