01 ZO6 Tsunami Cam results
02-26-2009, 06:19 AM
#27
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Thanks for the graph. STD numbers are a bit higher then SAE, but still great hp !! I am a little concerned with the torque curve ?? Dipping below 300 rwtq is a bit odd.
What is your compression SCR (10.5:1) and DCR ?? I love the HP especially up top, but that torque got me thinking she's weak down low compared to a lot of other cam only setups. Take away the aggressive zo6 gearing and it would only be worse.
What is your compression SCR (10.5:1) and DCR ?? I love the HP especially up top, but that torque got me thinking she's weak down low compared to a lot of other cam only setups. Take away the aggressive zo6 gearing and it would only be worse.
02-26-2009, 10:59 AM
#29
Thanks for the graph. STD numbers are a bit higher then SAE, but still great hp !! I am a little concerned with the torque curve ?? Dipping below 300 rwtq is a bit odd.
What is your compression SCR (10.5:1) and DCR ?? I love the HP especially up top, but that torque got me thinking she's weak down low compared to a lot of other cam only setups. Take away the aggressive zo6 gearing and it would only be worse.
What is your compression SCR (10.5:1) and DCR ?? I love the HP especially up top, but that torque got me thinking she's weak down low compared to a lot of other cam only setups. Take away the aggressive zo6 gearing and it would only be worse.
Yeah, she does feel a little lazy down low but this car felt almost the same way with the stock cam on the lower rpms but once you hit 3k she really pulls hard. I was thinking mabe some smaller runner heads and bump the compression up a bit might help?
02-26-2009, 11:11 AM
#30
Thanks for the graph. STD numbers are a bit higher then SAE, but still great hp !! I am a little concerned with the torque curve ?? Dipping below 300 rwtq is a bit odd.
What is your compression SCR (10.5:1) and DCR ?? I love the HP especially up top, but that torque got me thinking she's weak down low compared to a lot of other cam only setups. Take away the aggressive zo6 gearing and it would only be worse.
What is your compression SCR (10.5:1) and DCR ?? I love the HP especially up top, but that torque got me thinking she's weak down low compared to a lot of other cam only setups. Take away the aggressive zo6 gearing and it would only be worse.
If it's just a cruiser, though, then obviously this could be seen as a problem. But then again, if it's just a cruiser this probably wasn't the smartest choice for a cam, so that wouldn't make any sense.
But yeah, that torque curve is a bit disappointing considering this cam was advertised as big cam, high RPM power without sacrificing the lowend torque. Thoughts from TSP? Just curious.
Last edited by PewterScreaminMach; 02-26-2009 at 11:16 AM.
02-26-2009, 12:47 PM
#31
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That sub 300 rwtq dip has me concerned that stock SCR is not enough for this cam setup. I think some of the lowend torque issues could be solved with additional compression. Still haven't heard what your DCR is ??
02-26-2009, 01:11 PM
#32
Eh, that torque curve is funny down low...could be tune?? Hard to say without seeing A/F chart and tune though.
And of course it could use more compression...all cams with over 230º intake duration@.050" will want/need more than 10.2:1 SCR! A set of stock 5.3L heads with no port work or aftermarket valves/VJ would be better off just due to the bump in compression.
And of course it could use more compression...all cams with over 230º intake duration@.050" will want/need more than 10.2:1 SCR! A set of stock 5.3L heads with no port work or aftermarket valves/VJ would be better off just due to the bump in compression.
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02-26-2009, 01:36 PM
#34
We designed the cam with that in mind...."bigger" cam power, without a peak HP at 6500+ RPM. It's still big, but not as big as many cams that make similar power.
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02-26-2009, 02:05 PM
#35
I agree with this, the rest I have to think differently. That's why I didn't quote. At least we agreed on something.
That sub 300 rwtq dip has me concerned that stock SCR is not enough for this cam setup. I think some of the lowend torque issues could be solved with additional compression. Still haven't heard what your DCR is ??
That sub 300 rwtq dip has me concerned that stock SCR is not enough for this cam setup. I think some of the lowend torque issues could be solved with additional compression. Still haven't heard what your DCR is ??
Eh, that torque curve is funny down low...could be tune?? Hard to say without seeing A/F chart and tune though.
And of course it could use more compression...all cams with over 230º intake duration@.050" will want/need more than 10.2:1 SCR! A set of stock 5.3L heads with no port work or aftermarket valves/VJ would be better off just due to the bump in compression.
And of course it could use more compression...all cams with over 230º intake duration@.050" will want/need more than 10.2:1 SCR! A set of stock 5.3L heads with no port work or aftermarket valves/VJ would be better off just due to the bump in compression.
Matt, have you guys done any Tsunami cam / PRC LS6 2.5 heads combos yet on an Fbody? Gonna do a search but I didn't recall seeing anything like this.
02-26-2009, 02:08 PM
#36
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02-27-2009, 07:35 AM
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With that kind of tq curve, I would assume the dyno wasn't reading something right...there is no way that cam produces that wild of a tq curve...maybe a pack tac pick up???
