chunk t
Well-Known Member
- Joined
- Apr 1, 2002
- Messages
- 249
All you Engine guys... Compression questions.
I measured my 3.5 K&B and come up with a compression ratio of 12.4:1.
First... did I figure the ratio correctly.
Second, what compression ratios can I get away with on a Piped 3.5 K&B o/b?
I know that changing compression, different plug, different percentage nitro will affect detination. How do I factor these in, to find optimal compression so detination doesn't occur too early?
Bore - .65
Stroke - .635
= swept volume of .2107
Head clearance - .02
Head shim - n/a
= deck volume of .0066
dome diameter - .425
dome depth - .125
= head volume of .0118
BDC volume/TDC volume = 12.4:1
thanks,
chunk t
I measured my 3.5 K&B and come up with a compression ratio of 12.4:1.
First... did I figure the ratio correctly.
Second, what compression ratios can I get away with on a Piped 3.5 K&B o/b?
I know that changing compression, different plug, different percentage nitro will affect detination. How do I factor these in, to find optimal compression so detination doesn't occur too early?
Bore - .65
Stroke - .635
= swept volume of .2107
Head clearance - .02
Head shim - n/a
= deck volume of .0066
dome diameter - .425
dome depth - .125
= head volume of .0118
BDC volume/TDC volume = 12.4:1
thanks,
chunk t