compression for these cams

[dadawg]

what is max and min compression for these cams .
SE 251
SE 204
ANDREWS 54
ANDREWS 37
WOODS TW-5
WOODS TW-408-44

thansk for the help.

[Faast Ed]

I run my 54's at 10.4:1, but that is pushing the limit. 10.2:1 is safer.
Ran my 204's at just under 10:1 but I had a little hot start.  9.8:1 is about the max for 204's.

Can't tell you about the others.

[dadawg]

I run my 54's at 10.4:1, but that is pushing the limit. 10.2:1 is safer.
Ran my 204's at just under 10:1 but I had a little hot start.  9.8:1 is about the max for 204's.

Can't tell you about the others.

thanks
im considfering the 54's along with the 103 ci SE cast 10-1 flat tops  and the cometic gaskets .

[Faast Ed]

Here's one running at 10.4:1 (54's 103" Flat tops)

[dadawg]

Here's one running at 10.4:1 (54's 103" Flat tops)

nice curve starting about 2700 . how much headwork ?

[Faast Ed]

Just a mild street port. Added 1.9 intake valve, stock exhaust valve.
If I recall, the larger valve didn't help me much, if any.
WFO Larry did the heads.

Oh, and they have the detonation grooves in them. Pretty sure thats why I got away with 10.4:1.

[djl]

204s at 9.8 but would ping in summer heat (south Texas) if I had to tank up on corn fuel.

[mayor]

the max and min compression for particular cams is a subjective number.  The suitable compression range is determined from the intake close on the cam. Generally 9:1 corrected compression is recomended, with 9.5:1 corrected being pushed from time to time.  In the Tech Tips section is a calculator for determining corrected compression.  It's generally best to plug in actual measured volumes for the head chambers and piston volume since the published data can be wrong or misleading.

http://harleytechtalk.net/htt/index.php?topic=439.0