Author Topic: turbo 1300 to turbo 2300 conversion  (Read 80761 times)

0 Members and 3 Guests are viewing this topic.

Offline dsrace

  • VIP
  • *
  • Posts: 8581
  • my one true weakness
Re: turbo 1300 to turbo 2300 conversion
« Reply #30 on: December 05, 2016, 08:50:53 PM »
well here are some better pics... i hope.... to see if i made a rookie mistake and not saying i didn't as this is my first attemp....hence the spare head lol this is the intake side.   does the same principal apply for the exh port just under valve seat?
Don't never argue with an Idiot!
Because he will drag you down to his level and beat you with experience

Offline fabr

  • Administrator
  • *
  • Posts: 93126
Re: turbo 1300 to turbo 2300 conversion
« Reply #31 on: December 05, 2016, 09:05:33 PM »
Pics aren't good enough for me to say.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline dsrace

  • VIP
  • *
  • Posts: 8581
  • my one true weakness
Re: turbo 1300 to turbo 2300 conversion
« Reply #32 on: December 05, 2016, 09:06:29 PM »
and exh side
Don't never argue with an Idiot!
Because he will drag you down to his level and beat you with experience

Offline fabr

  • Administrator
  • *
  • Posts: 93126
Re: turbo 1300 to turbo 2300 conversion
« Reply #33 on: December 05, 2016, 09:09:56 PM »
and what are your thoughts on the poss effect, cutting the round exh port into a slight D shape like the turbo manifold inlet port i bought?
Just port match it or at least have no portion of the header hanging into the ex port area. It really isn't too important.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline dsrace

  • VIP
  • *
  • Posts: 8581
  • my one true weakness
Re: turbo 1300 to turbo 2300 conversion
« Reply #34 on: December 05, 2016, 09:13:54 PM »
gotcha and re read what you said about intake port. the top side right under the valve seat should have about a 60* angle vs the rest heading down. if i understand that correctly.
Don't never argue with an Idiot!
Because he will drag you down to his level and beat you with experience

Offline fabr

  • Administrator
  • *
  • Posts: 93126
Re: turbo 1300 to turbo 2300 conversion
« Reply #35 on: December 05, 2016, 09:30:45 PM »
well here are some better pics... i hope.... to see if i made a rookie mistake and not saying i didn't as this is my first attemp....hence the spare head lol this is the intake side.   does the same principal apply for the exh port just under valve seat?
Pretty much so.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline fabr

  • Administrator
  • *
  • Posts: 93126
Re: turbo 1300 to turbo 2300 conversion
« Reply #36 on: December 05, 2016, 09:32:19 PM »
gotcha and re read what you said about intake port. the top side right under the valve seat should have about a 60* angle vs the rest heading down. if i understand that correctly.
Yes. I actually do it in more of a big radius ,blending one angle into the next.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline dsrace

  • VIP
  • *
  • Posts: 8581
  • my one true weakness
Re: turbo 1300 to turbo 2300 conversion
« Reply #37 on: December 05, 2016, 09:38:43 PM »
i went and looked at the unmolested factory head. i see exactly what your talking about now. that angle on the factory head extends below the valve seat about 1/4" to 5/16" and only is found on the back side directing the stream into the middle of the combustion chamber. i learned something today!! i cannot take a good pic that will show it as i tried but ........ anyway the majority of that angle is still there but i did blend into it but not by much basically took the sharp angle off of it. i can see it and feel it with my finger. now the exh port is a diff story where it is still mostly there i did take more out on the exh side. the exh port coming out of the head is still slightly smaller than the header inlet port, i didn't want to open it to the full size.
Don't never argue with an Idiot!
Because he will drag you down to his level and beat you with experience

Offline fabr

  • Administrator
  • *
  • Posts: 93126
Re: turbo 1300 to turbo 2300 conversion
« Reply #38 on: December 05, 2016, 09:40:03 PM »
Most 5 angle valve jobs run something like this,15/30/45/60/75,top to bottom. Blending angle into angle makes for happy airflow. The seat should be a true 45 of around .060-.100 wide. Turbo use ,I'd like to see it near the .100. A wider seat helps cool the valve. On the intake side .040-.060 wide.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline fabr

  • Administrator
  • *
  • Posts: 93126
Re: turbo 1300 to turbo 2300 conversion
« Reply #39 on: December 05, 2016, 09:43:07 PM »
i went and looked at the unmolested factory head. i see exactly what your talking about now. that angle on the factory head extends below the valve seat about 1/4" to 5/16" and only is found on the back side directing the stream into the middle of the combustion chamber. i learned something today!! i cannot take a good pic that will show it as i tried but ........ anyway the majority of that angle is still there but i did blend into it but not by much basically took the sharp angle off of it. i can see it and feel it with my finger. now the exh port is a diff story where it is still mostly there i did take more out on the exh side. the exh port coming out of the head is still slightly smaller than the header inlet port, i didn't want to open it to the full size.
Perfectly fine and opening it up would not help . That mismatch helps minimize exhaust gasses reversion.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline dsrace

  • VIP
  • *
  • Posts: 8581
  • my one true weakness
Re: turbo 1300 to turbo 2300 conversion
« Reply #40 on: December 05, 2016, 10:58:11 PM »
Most 5 angle valve jobs run something like this,15/30/45/60/75,top to bottom. Blending angle into angle makes for happy airflow. The seat should be a true 45 of around .060-.100 wide. Turbo use ,I'd like to see it near the .100. A wider seat helps cool the valve. On the intake side .040-.060 wide.

funny you mention this because i was discussing this with the machine shop that is going to do the bore and valve work. he suggested a 4 angle or 5 angle. he was explaining it to me but all i really got from it is that air loves short edges lol  i will have pay attention more now.
Don't never argue with an Idiot!
Because he will drag you down to his level and beat you with experience

Offline BDKW1

  • Hero Member
  • ****
  • Posts: 896
Re: turbo 1300 to turbo 2300 conversion
« Reply #41 on: December 06, 2016, 02:31:39 AM »
The word of the day is "boundary layer"....... Well, 2 words......
Skip the 5 angle on the exhaust side and go full radius.

Offline fastcorvairs

  • Lifetime VIP
  • *
  • Posts: 2892
  • If it is worth doing!!!!!! Do it in the sand
Re: turbo 1300 to turbo 2300 conversion
« Reply #42 on: December 06, 2016, 05:22:44 AM »
The word of the day is "boundary layer"....... Well, 2 words......
Skip the 5 angle on the exhaust side and go full radius.

This leaves no margin of heat transfer. You are not going to gain that much more HP and we are not talking cutting seconds from a quarter mile time. 

If I believe I cannot do something it makes me incapable of doing it. But when I believe that I can, then I acquire the ability to do it , even if I didn't have it at the beginning.

Offline fabr

  • Administrator
  • *
  • Posts: 93126
Re: turbo 1300 to turbo 2300 conversion
« Reply #43 on: December 06, 2016, 05:58:45 AM »
This leaves no margin of heat transfer. You are not going to gain that much more HP and we are not talking cutting seconds from a quarter mile time.
CORRECT! On a turbo engine especially,a slightly wider than usual seat is a necessity.
"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline fastcorvairs

  • Lifetime VIP
  • *
  • Posts: 2892
  • If it is worth doing!!!!!! Do it in the sand
Re: turbo 1300 to turbo 2300 conversion
« Reply #44 on: December 06, 2016, 09:15:03 AM »
CORRECT! On a turbo engine especially,a slightly wider than usual seat is a necessity.

Correct.  The seat is where the heat in the valve is extracted.  With a full radius seat there would only be a thin line where the valve will contact the seat.  There would be no heat transfer from the valve.  This arrangement is suited for and engine that will be taken down after a couple of races and freshened up.  There is no reason for a special vale seat grinding for a turbo engine.  For a turbo engine boosting 25/30 psi that kind of pressure don't care what the valve seat configuration is, It is going into the cylinder via any route it can find. 
« Last Edit: December 06, 2016, 09:20:53 AM by fastcorvairs »

If I believe I cannot do something it makes me incapable of doing it. But when I believe that I can, then I acquire the ability to do it , even if I didn't have it at the beginning.

 

SimplePortal 2.3.7 © 2008-2024, SimplePortal