317 or 823
317 or 823 I have been doing some looking and it's just making my head spin so its time to ask lol.
I have everything to use 317 or 823 head on my lc8, from what I understand it's like an lq4 but with gen 4 rods and the 823 heads with different valves and seat for cng.
I'm not sure what heads I want to run. Both need some work. 317 needs to be milled a little to clean up some scratches. And the 823 dropped a valve damaging the seat. So I'm not sure if I want to the the 317s shaved a little or 823. If I do 823 then the next question would be when is it worth to put lighter intake valves in.
When the build is all said and done it will have a turbo, and i have a 231/234 cam for it. Its mostly street use track every now and then.
Thanks
I have everything to use 317 or 823 head on my lc8, from what I understand it's like an lq4 but with gen 4 rods and the 823 heads with different valves and seat for cng.
I'm not sure what heads I want to run. Both need some work. 317 needs to be milled a little to clean up some scratches. And the 823 dropped a valve damaging the seat. So I'm not sure if I want to the the 317s shaved a little or 823. If I do 823 then the next question would be when is it worth to put lighter intake valves in.
When the build is all said and done it will have a turbo, and i have a 231/234 cam for it. Its mostly street use track every now and then.
Thanks
If your going turbo then the 317's will be fine.
I would personally find another set of 823's if the budget allows and use them, not only are they better heads but the intake is also better.
I also wouldnt go with a cam quite that big if doing a turbo, not that it wont work but its just not needed.
I would personally find another set of 823's if the budget allows and use them, not only are they better heads but the intake is also better.
I also wouldnt go with a cam quite that big if doing a turbo, not that it wont work but its just not needed.
That's one reason I was thinking about the 823, better intake. But what concerns me is the intake valve size/weight and some say the casting is not very good and doesn't like boost. I think I can put a new seat and valve in and they will be fine.
I went with the larger of the 2 cams I was looking at few reason
To do be a little different.
My truck is front heavy so giving up a little down low maybe a good thing for traction, and the exhaust valve opening time should help spool the turbo a little better.
All of that could be wrong but I'm willing to try it.
I went with the larger of the 2 cams I was looking at few reason
To do be a little different.
My truck is front heavy so giving up a little down low maybe a good thing for traction, and the exhaust valve opening time should help spool the turbo a little better.
All of that could be wrong but I'm willing to try it.
Last edited by dmaxs10; Aug 27, 2020 at 11:32 AM.
That's one reason I was thinking about the 823, better intake. But what concerns me is the intake valve size/weight and some say the casting is not very good and doesn't like boost. I think I can put a new seat and valve in and they will be fine.
I went with the larger of the 2 cams I was looking at few reason
To do be a little different.
My truck is front heavy so giving up a little down low maybe a good thing for traction, and the exhaust valve opening time should help spool the turbo a little better.
All of that could be wrong but I'm willing to try it.
I went with the larger of the 2 cams I was looking at few reason
To do be a little different.
My truck is front heavy so giving up a little down low maybe a good thing for traction, and the exhaust valve opening time should help spool the turbo a little better.
All of that could be wrong but I'm willing to try it.
224/236 (Dr Bumpstick DR-122413)
Just a s10 so it wont be towing. Mostly street some 1/4 stuff. I have been pageing through older threads, my searching must of to specific, looks like the general consensus is the 823 work best with a 400+ ci. So I'm leaning to the 317s, doing some port work to then, and putting the 823 on the shelf for future use.
Just a s10 so it wont be towing. Mostly street some 1/4 stuff. I have been pageing through older threads, my searching must of to specific, looks like the general consensus is the 823 work best with a 400+ ci. So I'm leaning to the 317s, doing some port work to then, and putting the 823 on the shelf for future use.
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That is true for making more power, that's why I'm going to keep them around. If I put them on I want to put lighter intake valves in it to take some stress off the valve train and that's not going to fit in my budget this time around.
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