2.2L L61 Performance Tech 16 valve 145 hp EcoTec with 155 lb-ft of torque

valve train

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Old Jan 7, 2009 | 11:32 AM
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bikeboyben14's Avatar
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From: owensboro ky
valve train

on a turbo setup how good is our factory valve train good to rev up to? or is it just way more benefical to go to a turbo cam
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Old Jan 7, 2009 | 03:50 PM
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well, the balance shafts and valve springs will kind of ,imit your max RPM to around 7000RPMs, maybe a little more. Your cam profile will also limit power gained to around 6800RPMs. power starts dropping off very fast after 6100RPMs with the stock cams
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Old Jan 8, 2009 | 03:29 AM
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so in order to rev up at all to make power at 7000 i need some headwork.... screw my 07
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Old Jan 8, 2009 | 03:51 AM
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^^ its not a honda dude... make your power down low like you're supposed to. ectocs are known for torque, not high revs
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Old Jan 8, 2009 | 10:23 AM
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The valve train is good till 7000rpm so upgrade the valve springs and all that. So if you keep it around 6800rpm it should be good. Neutral balance shafts will allow you to rev up to 8000rpm after you upgrade the valve train. You have an American car not Japanese. Our cars aren't making power like a Honda does at 8000rpm
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Old Jan 8, 2009 | 11:03 AM
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Mine is set to 7100 RPM Running like a champ!!

with no internals
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Old Jan 8, 2009 | 11:16 AM
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Originally Posted by copson20
Mine is set to 7100 RPM Running like a champ!!

with no internals
same here. have been for about 10k miles
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Old Jan 8, 2009 | 03:01 PM
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so really whats our factory cams good for, just 6100 rpms like mentioned above?
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Old Jan 8, 2009 | 03:08 PM
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i have the 272 regrind cams in my LSJ.... with supertech dual coil valve springs, and nuetral balance shafts from GM... my car is good at 8,000RPMs.... dont know if that helps you guys at all..
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Old Jan 8, 2009 | 03:17 PM
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ok lets say if i upgraded my valvesprings and put oversized valves in would it be good up to like 6500rpms on factory cams, im just trying to get as much flow as can with the turbo
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Old Jan 8, 2009 | 03:21 PM
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Originally Posted by bikeboyben14
ok lets say if i upgraded my valvesprings and put oversized valves in would it be good up to like 6500rpms on factory cams, im just trying to get as much flow as can with the turbo
have you talked to a shop about doing the head work for you cuz it gets expensive... i put my own valve springs in cuz a shop wanted over 300 just to put them in... but if you want to put over sized valves in your gonna have to pay them to bore out your ports
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Old Jan 8, 2009 | 03:28 PM
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my family owns a performance machine shop, not so much worried about that, ill prolly get a port and polish job done as well. the only thing id have to pay for would be is the bits if they break
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Old Jan 8, 2009 | 04:00 PM
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wow thats great.. go for it!
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Old Jan 8, 2009 | 04:27 PM
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You are thinking too much about parts and not enough about results. As mentioned, this isn't a honda.

Acceleration comes from torque, not horsepower. Yes, you make more horsepower at higher RPM's, but you should be caring about torque. The stock cam torque curve is between 3000-5500 RPM, so if you are staying with stock cams, your don't have to do a damn thing to your valve train. Now if you change cams, your have to consider the new torque curve for those cams, and then plan accordingly.
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