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Speed inc SI5 cam

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Old 06-09-2012, 03:27 AM
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Default Speed inc SI5 cam

Finally cammed. SI5 231 237 .589 .595 112, ls6 intake, kooks 1 7/8, ory, loudmouth. Put down 402hp 390tq and the only other thing i needed was a new fuel pump and I went with the aeromotive 340 stealth one. A month later the fuel pump died but it was all taken care of and i can enjoy it more once we figure out this o2 problem.



Last edited by MR WESST 02; 06-09-2012 at 04:52 AM.
Old 06-09-2012, 03:45 AM
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hell yea!
Old 06-09-2012, 04:54 AM
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Nice!!!...track times needed now!!
Old 06-10-2012, 03:26 AM
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Thanks and ill have some track times after I get my ls7 clutch
Old 06-10-2012, 05:40 AM
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Originally Posted by MR WESST 02
Thanks and ill have some track times after I get my ls7 clutch
Too heavy IMO. Look at aftermarket with light flywheel.
Old 06-10-2012, 09:54 AM
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Good numbers. Do you have underdrive pulley or ported tb? any chance of a graph?
Old 06-12-2012, 12:52 PM
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Sounds really well! Impressive numbers as well
Old 06-12-2012, 02:12 PM
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SI5 is a nice cam - I like mine
Old 06-12-2012, 03:01 PM
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what springs are you running? 7.4 rods? i was looking at the Si5 or the V2
Old 06-12-2012, 04:09 PM
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Sounds great at idle, have almost the same setup with a TRex. I am ditching the LM setup though, way to nasty on the move and is starting to draw too much attention.
Old 06-13-2012, 05:54 AM
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Originally Posted by 03Sssnake
Sounds great at idle, have almost the same setup with a TRex. I am ditching the LM setup though, way to nasty on the move and is starting to draw too much attention.
Ya think? lol. You'd probably like the Borla stingers. They seem to muffle it down a bit more than the loudmouths but sound wicked WOT. Sorry to hijack thread.
Old 06-13-2012, 02:20 PM
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I looked into the SI5 and SI6. A lot of good numbers on them. I ended up with the Tsunami (235/240)
Old 06-15-2012, 01:32 AM
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Originally Posted by 03Sssnake
Sounds great at idle, have almost the same setup with a TRex. I am ditching the LM setup though, way to nasty on the move and is starting to draw too much attention.
Thats a good point lol. When i first got full exhaust i loved it, but now i can't get up to the speed limit semi-quick without being loud as ***** and ehaust wrapping and echoing off everything nearby. I still love going through tunnels and scaring people with it though I was thinking about some stingers as well too..maybe next year.
@ldyzluvdis06 Yeah im running speed inc's 5/16" 7.4 rods. PAC beehives .625 lift, ngk copper plugs, msd sc wires, trunion upgrade, slp heavy duty oil pump, Gen III double timing chain, and a aeromotive 340 fuel pump.

p.s. here's the graph.
Old 06-15-2012, 10:18 AM
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If you want a new muffler look at the Magnaflow Race muffler or Borla XR1. Both sound awesome on cammed cars but not annoying like the lM1
Old 06-15-2012, 11:18 AM
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Graph not working. And i don't know if I missed it somewhere but underdrive pulley or tb?
Old 06-16-2012, 05:24 AM
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Originally Posted by ds98formula
Graph not working. And i don't know if I missed it somewhere but underdrive pulley or tb?
My bad but no underdrive pulley and its the stock tb no porting or anything either, but i definitely thought the torque was 390 but its 381. I want to just break 400tq with some small stuff. This graph should work though lol.

Old 06-16-2012, 08:41 AM
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Nice numbers and nice curve. 400tq cam only is tough to get
I have the same cam got it fished 2 weeks ago. I really need to get a real y pipe and maybe some bigger headers. I have a home mad y pipe and it has sharp bends I think it is holding my power back. I will post my graph in a wile

Last edited by ds98formula; 06-16-2012 at 08:59 AM.
Old 06-16-2012, 09:43 AM
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Here is my graph. I hope once I get a real Y pipe and underdrive pulley my horespower is closer to yours.
Old 06-16-2012, 09:54 AM
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Sounds good man. Thanks for the memories, same everything except headers. Reminds me of when I use to start mine in the morning. Let her warm up a few mins and go to work.lol
Now I've got B+B triflows which toned it down a bit. 2 reasons why I switched was neighbors(my decision) oh, and Illinois state trooper one day after work.lmfao
Old 06-16-2012, 02:49 PM
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how is the drivability? my car is a DD but i am thinking about going with it. would you guys suggest against it? also, why a double chain instead of just a single, any reason particularly?


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