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Thread: Straightening a VE head?

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Posts: 1-9 of 9
2014-09-09 14:35:39
#1
Straightening a VE head?
Hello,

Is it a good idea and does it make a difference to straighten the head of a VE for a little more compression?
Is the VE head not design to chop for example 0,3milimeter of or is it possible? And if its possible, how much is there to chop off with a milling machine. (If thats the right word for the machine that does that )

I know that because you change the height of the complete head, you change the complete distance from crankshaft to camshaft but thats fixable by placing adjustabel camgear and measure them out. So that is not going to give extra problems. My only consurn is that the head is not made to chop a bit off.

I dont know whats and if theres a english word for but i hope you understand what i mean.
Thanks
2014-09-09 15:04:56
#2
if you mean shaving the head to bump compression, i believe the sr16ve n1 head had a fair bit shaved off it standard.

you could also achieve this buy putting new higher comp pistons in it too, and leave the head alone.
2014-09-09 17:57:42
#3
Yes i did mean shaving the head. Whats the max to shave off using the oem pistons? Whats a save number to shave off?

Offcourse i can change the pistons, this costs only about 8 times more than shaving of the head.
2014-09-09 19:30:37
#4
If you shave the head down and see any HP gains at all please let us know. The cost of doing this and the gains......if any...... are not worth your time or money. But feel free to give it a shot, seems to be a trend on this forum.....spending 1000$ per HP.
2014-09-09 19:44:00
#5
Hahahaha thanks for your consurn, but im rebuilding a VE so the costs of it will be not that really high. The idea was to rebuild it but why not upgrade it when thats also a possibility
2014-09-09 21:45:34
#6
Originally Posted by Stephen_Cube
Hahahaha thanks for your consurn, but im rebuilding a VE so the costs of it will be not that really high. The idea was to rebuild it but why not upgrade it when thats also a possibility


http://www.sr20-forum.com/classifieds-naturally-aspirated/74690-sr16ve-pistons.html

$160, notch the skirts to clear the oil squirters. thick metal head gasket. 12.5/13 to 1 comp.
2014-09-09 21:51:43
#7
Shaving the head just to bump compression is a not a good idea, in my opinion. Especially when there are much better options that will not affect cam timing, nor lead to a cyclinder head that is less serviceable in the future, as well as not making the head more prone to overheating and warpage. If you mill the head by 0.3 mm and it overheats, what will you do then? Take more off? Also, how much are you planning on taking off the short block? I don't know the exact numbersoff the top of my head but only taking 0.3mm off will not result in much of a compression bump. Certainly nothing worthwhile or noticeable with your foot.

Is this a standard SR20VE block? How much is the machine work and all the combined work going to cost you? Why not just get some used SR16VE pistons. They can be had for $150 shipped. They will give you a nice, cheap compression bump.
2014-09-10 14:21:16
#8
Originally Posted by Stephen_Cube
Hahahaha thanks for your consurn, but im rebuilding a VE so the costs of it will be not that really high. The idea was to rebuild it but why not upgrade it when thats also a possibility


Oh ok. Then see if you can get some 16ve pistons to install during the rebuild. They can be had for 150$ most of the time and they will improve performance.
2014-09-10 18:28:02
#9
I have sr-6 pistons amongst other things. I'd suggest that.
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