Technical > Matt Shaff's Engine Shop

Cam help and info.

<< < (2/3) > >>

Chuck466:
Yes pistons are already flattops so can't do much there, heads I have now are 55cc so the new set I'm looking at will be 65cc or they have a 70cc and much better flow just new technology..

Paul New:
The cam looks like a typical blown alcohol SBC cam that I have run maybe a little small on the lift from mine but everything else is in line.  I have run up to 12.5-1 with a blower just have to be careful you have smalller tuning windows but it will work.
My current cam
Duration at .050     283          298
Lobe Lift           .4800        .4600
Separation     113.             OP     CL         OP     CL
Timing Events @.050       32.5     70.5     86     32

Duration @.020       317          340
Gross Valve lift    .720         .690
Rocker Ratio         1.5         1.5
Valve Lash          .018         .029

Degree Intake Lobe to  109
50mm

But I am using 1.7 ratio

Chuck466:
Right on thanks Paul for the info.

wideopen231:
You can buy pistons for any compression ratio. Maybe not off the shelf. I buy them in 10 sets(2 spares because custom) specify stroke , custom rod length and compression deired with combustion chamber cc's in head.

Another option and cheapest,well in one way of looking at it. Any machine shop should be able to open chambers 10 cc's. Open around intake and exhuast valve to most you can or till get the desired cc's. Heck with some time and caution you can do it with die grinder and cc'ing equipment.  As I have been called on another site,being a broke dyck I would do it myself. Will take cpl hours but trading sleep for performance is cheap.LOL

wideopen231:
Stupid question. Have you checked actual cc's in combo? Actual not advertised. They rarely are the same. Not trying to be insulting just know how much difference there can be.

Navigation

[0] Message Index

[#] Next page

[*] Previous page