whats needed to raise the redline?
02-24-2008, 08:46 PM
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whats needed to raise the redline?
I know all you need to do is get hpt and increase it.... but what parts are needed to do it or is nothing needed at all?
02-24-2008, 08:47 PM
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How high you want to go? You can get to 7,500 on stock motor.
Anything above that your going to want Neutral Balance Shafts, Upgraded Valvesprings/Retainers, and probably better cams to shift the powerband.
Anything above that your going to want Neutral Balance Shafts, Upgraded Valvesprings/Retainers, and probably better cams to shift the powerband.
02-24-2008, 08:52 PM
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what he said minus the 7500 RPM stock.. i know people who have broken a rocker and toaster there head's trying to rev that high bone stock valvetrain. i say to keep her safe dont go above 7200.. but for sure if your gonna run to 8k get some cam's to shift the powerband. and of course the spring's/retainer's, neutral balance shaft's which IIRC is the same as removing them completly
02-24-2008, 08:56 PM
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02-24-2008, 09:00 PM
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so to get up to 7500 safely...
neautral balance shafts
valvesprings.... http://www.jbodyperformance.com/new/...catName=JP0923
retainers... http://www.jbodyperformance.com/new/...catName=JP0930
and cams... http://www.jbodyperformance.com/new/...catName=JP0990
the ones I posted in the link is that fine?
neautral balance shafts
valvesprings.... http://www.jbodyperformance.com/new/...catName=JP0923
retainers... http://www.jbodyperformance.com/new/...catName=JP0930
and cams... http://www.jbodyperformance.com/new/...catName=JP0990
the ones I posted in the link is that fine?
02-24-2008, 09:07 PM
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Do you plan on boosting the LE5 at all?
Could make a tough decision with cams.
Personally I hate JBP products, some of the stuff isn't even theirs anyway. You could go with a custom regrind suited for your plans.
Also don't forget, longer stroke motors do not like being rev'd as high as square motors (such as the LSJ).
Could make a tough decision with cams.
Personally I hate JBP products, some of the stuff isn't even theirs anyway. You could go with a custom regrind suited for your plans.
Also don't forget, longer stroke motors do not like being rev'd as high as square motors (such as the LSJ).
02-24-2008, 09:16 PM
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Yes, I forgot to add the exhaust part. Wouldn't be bad if he can get his hands on a set cheap if he plans on using a Turbo.
If you plan on going N/A, I would get a regrind from Crower. Also, since your head will be coming off for the valve spring install, you might as well drop in higher compression pistons.
If you plan on going N/A, I would get a regrind from Crower. Also, since your head will be coming off for the valve spring install, you might as well drop in higher compression pistons.
02-24-2008, 09:20 PM
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Do you plan on boosting the LE5 at all?
Could make a tough decision with cams.
Personally I hate JBP products, some of the stuff isn't even theirs anyway. You could go with a custom regrind suited for your plans.
Also don't forget, longer stroke motors do not like being rev'd as high as square motors (such as the LSJ).
Could make a tough decision with cams.
Personally I hate JBP products, some of the stuff isn't even theirs anyway. You could go with a custom regrind suited for your plans.
Also don't forget, longer stroke motors do not like being rev'd as high as square motors (such as the LSJ).
Yes, I forgot to add the exhaust part. Wouldn't be bad if he can get his hands on a set cheap if he plans on using a Turbo.
If you plan on going N/A, I would get a regrind from Crower. Also, since your head will be coming off for the valve spring install, you might as well drop in higher compression pistons.
If you plan on going N/A, I would get a regrind from Crower. Also, since your head will be coming off for the valve spring install, you might as well drop in higher compression pistons.
Last edited by Dragonsfire12345; 02-24-2008 at 09:20 PM. Reason: Automerged Doublepost
02-24-2008, 09:21 PM
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7000 rpm is fine mechanically stock.
up to 7500 the valve springs should be upgraded with aftermarket pieces.
up to 8000 the balance shafts should be replaced with neutrals.
Obviously, cams, headwork and fueling are issues that need to be addressed to actually make the change in max engine speed useful, but above are the recommended limits according to GM's Ecotec build book.
up to 7500 the valve springs should be upgraded with aftermarket pieces.
up to 8000 the balance shafts should be replaced with neutrals.
Obviously, cams, headwork and fueling are issues that need to be addressed to actually make the change in max engine speed useful, but above are the recommended limits according to GM's Ecotec build book.
02-24-2008, 09:22 PM
#22
You can get a custom one off from diamond
You are teh smartest
Seriously.
7000 rpm is fine mechanically stock.
up to 7500 the valve springs should be upgraded with aftermarket pieces.
up to 8000 the balance shafts should be replaced with neutrals.
Obviously, cams, headwork and fueling are issues that need to be addressed to actually make the change in max engine speed useful, but above are the recommended limits according to GM's Ecotec build book.
up to 7500 the valve springs should be upgraded with aftermarket pieces.
up to 8000 the balance shafts should be replaced with neutrals.
Obviously, cams, headwork and fueling are issues that need to be addressed to actually make the change in max engine speed useful, but above are the recommended limits according to GM's Ecotec build book.
Seriously.
Last edited by steddy2112; 02-24-2008 at 09:22 PM. Reason: Automerged Doublepost
02-24-2008, 09:28 PM
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