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 1434 Posts Member #: 8466 Post Whore Mansfield |
1st Jun, 2013 at 05:38:17pm
Sorry max power at 6180prm Class C 3rd Place Avon 2011 14.18 @101mph |
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 6745 Posts Member #: 828 Post Whore uranus |
1st Jun, 2013 at 05:41:10pm
On 1st Jun, 2013 alaskanow0 said:
That's the thing it's as 90ft/lb at 2.5k through to 5k, then falls off. I guess the 7 port head helps it hold power later. I don't plan to rev past 5.5k with normal driving between 2-5k Do you think MD246 will gain more bottom end over SW5. Also where do you see the MD274 power band then. yes that makes sense matt . i think as i said, i was focussing on the 2 to 5k usage band ,so trying to build up the 1k to 3k area as muh as possible , so it effectively drives like a supercharged engine as much as possible . i cannot compare the cams until i am really comfy with those sw5 numbers , as i said , it seems very very short on duration in the specs. its really much more usefull to have th 0.050''(or 1mm) lift numbers to compare for all these cams , it may be that swift have ground a really fast ramp on it , but it would be what ,226d at 50 thou normal ,so ramps would be 244-226=182=9degr which is just not feasable , 22d ramp is really pushing it . Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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6745 Posts Member #: 828 Post Whore uranus |
1st Jun, 2013 at 05:45:52pm
m att , can you ask the dyno chap if there is an unsmoothed graph available? that one has a very smooth shape which may be because it has been averaged to make it smoother , a lot of the latest dynos do this ,and it tekes away a lot of the engineering design info . its normally an options box on the software .i like the least smoothing .i can show you some examples if you like . Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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1434 Posts Member #: 8466 Post Whore Mansfield |
1st Jun, 2013 at 07:30:47pm
From my knowledge of the SW5 cam I know it as a very fast ramp. So much so, cams don't last very long, especially with higher lift rockers. In all my engines with the SW5, they have been really Tappetty, the main reason I bought the 274.
Class C 3rd Place Avon 2011 14.18 @101mph |
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6745 Posts Member #: 828 Post Whore uranus |
1st Jun, 2013 at 11:23:25pm
kent 948 looks ok too , bit flatter trq curve. Edited by robert on 3rd Jun, 2013. Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM |
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10 Posts Member #: 11981 Member |
28th Oct, 2024 at 09:44:39pm
Old thread resurrection. I am doing exactly the same as the OP. What camshaft please for 7 port at low boost high compression. Preferably to run a 2.9
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