max rpm
04-04-2011, 07:06 PM
#1
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max rpm
Okay, To get things out of the way, I've tried searching on multipul occassions and never found exactly what I was looking for
So to get on to it, I'm curious as to wat a safe max rpm Is for the LSJ, I know we could bennifit from the higher rpms, since its a supercharger And we have to use gearing to our advantage ( shifting from one gear to the next will return the rpms to max tourque kinda like a honda)
I've seen options of 7000-7400 on zzp But I'm more curious about reliability. If i recall correctly I think GMS2 is 7000? And GMS3 is adjustable But not sure what to.
Another quick question, If valve springs were upgraded new max rpm would be? That's if the stock oil pump can take it ( my focus would need a new pump to run must past stock )
So to get on to it, I'm curious as to wat a safe max rpm Is for the LSJ, I know we could bennifit from the higher rpms, since its a supercharger And we have to use gearing to our advantage ( shifting from one gear to the next will return the rpms to max tourque kinda like a honda)
I've seen options of 7000-7400 on zzp But I'm more curious about reliability. If i recall correctly I think GMS2 is 7000? And GMS3 is adjustable But not sure what to.
Another quick question, If valve springs were upgraded new max rpm would be? That's if the stock oil pump can take it ( my focus would need a new pump to run must past stock )
04-04-2011, 07:18 PM
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most people stick around 6500 to 7200 on the max rpm. you can go higher with valves and cams. there is a thread on here with ryan at zzp takes his car to 8000 redline but he is fully built and turboed.
04-04-2011, 10:31 PM
#4
max rpm on the LSJ pcm is 8125. to rev that high you need a valvetrain that will support it, and either neutral balance shafts or in my case my whole engine is balanced and i run balance shaft deletes. my cams are also capable of making power to 9000+ stock cams arent good for any sort of power benifits at these rpms.
04-04-2011, 11:27 PM
#8
max rpm on the LSJ pcm is 8125. to rev that high you need a valvetrain that will support it, and either neutral balance shafts or in my case my whole engine is balanced and i run balance shaft deletes. my cams are also capable of making power to 9000+ stock cams arent good for any sort of power benifits at these rpms.
stock long block not recommended for anything over 7500. Also not recommended to stay at that high an rpm more than long enough to touch it before a shift. However, if you want to play it safe, 7200 and you wont have to worry about it. To safely run higher RPMs its recommended to get either Neutral Balance Shafts, or a Balance Shaft Delete Kit, and at least 78lb valve springs and you can rev til the pcm limits if you want. A full valve train is never a bad idea though if you are going to be revving that high, esp often.
Last edited by RooTBeeR; 04-04-2011 at 11:35 PM.
04-05-2011, 12:18 AM
#11
I have always reved to 7250 rpm. Well, that's my limiter. I usually shift around 7100 rpm to avoid bumping it.
Although many have done it w/o issue, I wouldnt recommend reving much past 7250 rpm on the stock valve springs. I may be going the route of building up my valvetrain & engine components to handle higher rpms (78lb springs & NB shafts) in the near future.
Although many have done it w/o issue, I wouldnt recommend reving much past 7250 rpm on the stock valve springs. I may be going the route of building up my valvetrain & engine components to handle higher rpms (78lb springs & NB shafts) in the near future.
Last edited by Staged07SS; 04-05-2011 at 07:01 AM.
04-05-2011, 08:04 AM
#12
actually its 8192RPM
stock long block not recommended for anything over 7500. Also not recommended to stay at that high an rpm more than long enough to touch it before a shift. However, if you want to play it safe, 7200 and you wont have to worry about it. To safely run higher RPMs its recommended to get either Neutral Balance Shafts, or a Balance Shaft Delete Kit, and at least 78lb valve springs and you can rev til the pcm limits if you want. A full valve train is never a bad idea though if you are going to be revving that high, esp often.
stock long block not recommended for anything over 7500. Also not recommended to stay at that high an rpm more than long enough to touch it before a shift. However, if you want to play it safe, 7200 and you wont have to worry about it. To safely run higher RPMs its recommended to get either Neutral Balance Shafts, or a Balance Shaft Delete Kit, and at least 78lb valve springs and you can rev til the pcm limits if you want. A full valve train is never a bad idea though if you are going to be revving that high, esp often.
04-05-2011, 08:52 AM
#14
I have always reved to 7250 rpm. Well, that's my limiter. I usually shift around 7100 rpm to avoid bumping it.
Although many have done it w/o issue, I wouldnt recommend reving much past 7250 rpm on the stock valve springs. I may be going the route of building up my valvetrain & engine components to handle higher rpms (78lb springs & NB shafts) in the near future.
Although many have done it w/o issue, I wouldnt recommend reving much past 7250 rpm on the stock valve springs. I may be going the route of building up my valvetrain & engine components to handle higher rpms (78lb springs & NB shafts) in the near future.
12-29-2012, 08:30 AM
#25
how so i figured since the lash adjuster acts as a cushion it would absorb some of the cams lift...
with solids u only have lets say .008-.010 of lift loss cuz of the clearence u need there.
thats the way i see it lol
with solids u only have lets say .008-.010 of lift loss cuz of the clearence u need there.
thats the way i see it lol