max rpm's on stock bottom end
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yeah i know where the rev limit is i guess what i mean is if i had a head that would flow in the upper 8k and above range would the stock bottom hold up? and where is its limit?
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Im sure its a possibility, but I would not try it. If youre planning on doing that why dont you at least get some valvesprings and retainers? They're not that expensive and they will give you that added safety.
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Yes bottom end is actually good for 10000rpms. Now the head will be in question and IMO I think it will be good for 9000 but no more than that and 9000is pushing it. I woudl say 8500 for safety. Now if you had a built head I would say 10000. Your block wouldnt be questionable it would be your head.
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#9
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Originally Posted by SKILMATIC
Yes bottom end is actually good for 10000rpms. Now the head will be in question and IMO I think it will be good for 9000 but no more than that and 9000is pushing it. I woudl say 8500 for safety. Now if you had a built head I would say 10000. Your block wouldnt be questionable it would be your head.
For the sake of your motor and wallet, don't take it much past 7800.
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Caleb Cornelius (Mar 7, 2021)
#14
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Originally Posted by .MM
your fine to take it to about 8400 rpms
after that, upgrade your valves and rods
after that, upgrade your valves and rods
Many of the guys with aftermarket turbos are pushing the stock motor to 8k, some even to 8.5k w/o issues. That's not to say that it is SAFE. Stick with <8k if you don't want to compromise reliability.
Last edited by anjapower; Mar 3, 2006 at 08:24 AM.
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OMG could ONE of you peeps at least give some FACTS about why this or why that? So far it's 10K, 8.5K, someone said don't go past 7800 (that's what they said about sound barrier too , someone started talking about the head...when it's the bottom end that is the question....yadda, yadda, yadda...
With the amound of BS floating around here from young'ins *KNOWING* they must be right - give some freaken FACTS please!
If you have hearsay or have never tried it yourself, or don't live and breath these engines (and at least qualify yourself) then pipe down please.
For instance I would qualify my knowledge that the SR20DE bottom end can go past 8K rpm because I've done it (yeah, big deal), crank is balanced/counterweighted, cross bracing on bottom of block, windage tray for oil, etc - little doodads that make it happen.
I really would like to know if I can do 8K rpm on the stock block, for less than 60 seconds, after upgrading the head with the right bits - on the 06.
With the amound of BS floating around here from young'ins *KNOWING* they must be right - give some freaken FACTS please!
If you have hearsay or have never tried it yourself, or don't live and breath these engines (and at least qualify yourself) then pipe down please.
For instance I would qualify my knowledge that the SR20DE bottom end can go past 8K rpm because I've done it (yeah, big deal), crank is balanced/counterweighted, cross bracing on bottom of block, windage tray for oil, etc - little doodads that make it happen.
I really would like to know if I can do 8K rpm on the stock block, for less than 60 seconds, after upgrading the head with the right bits - on the 06.