Stock 5s limit |
Stock 5s limit |
Jan 25, 2006 - 1:06 AM |
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Enthusiast Joined Nov 4, '02 From Hecho en la Republica Dominicana/Living in NJ Currently Offline Reputation: 0 (0%) |
Ok i can't seam to find what i was looking for ..
so my question is what is the highest reported boost before breakdown on a 5s with stock internals.. and also does anyone if there is a company that makes stronger valve spring for for the 5s ? -------------------- |
Jan 30, 2006 - 5:23 PM |
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Enthusiast Joined Oct 17, '04 From St Louis, MO Currently Offline Reputation: 0 (0%) |
i don't care much for xpsi
you can make 300hp @ 12psi or 200 hp @21psi alot of psi is more heat, and the possibility of lifting the head (since that psi gets multiplied up by compression) ... a ported and oversized valves and cammed 5sfe will make more hp @ lower psi...so if your goal is 20psi that doesn't quite make sense to me ... you can do that on a stock 5sfe with enough octane ...but that doesn't mean you'll make the power you think you'd be making... as far as valve springs...depending on what year 5sfe you're using ...either 3sgte, or 4age, or 2jzge valve springs will drop right in ...some years had smaller valve springs which are compatable with the 4age stuff...and other years had larger springs in which case the 3sgte/2jzge size would fit ...and it's definately an upgrade since all these motors have higher lift cams, and higher redlines... good luck with your project... -------------------- 2005 MB C200 Kompressor- K&N, Apexi WS2 Catback, DIY Voltage stabilizer, Intrax Springs, H&R RR swaybar, VDO Boost Gauge @ 6psi, Greddy L7 plugs, +0 Rear tires
To Do: E-manage Ultimate tuned up to 12psi |
Feb 2, 2006 - 2:02 AM |
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Enthusiast Joined Nov 4, '02 From Hecho en la Republica Dominicana/Living in NJ Currently Offline Reputation: 0 (0%) |
QUOTE(NuclearHappineS @ Jan 30, 2006 - 5:23 PM) [snapback]386526[/snapback] i don't care much for xpsi you can make 300hp @ 12psi or 200 hp @21psi alot of psi is more heat, and the possibility of lifting the head (since that psi gets multiplied up by compression) ... a ported and oversized valves and cammed 5sfe will make more hp @ lower psi...so if your goal is 20psi that doesn't quite make sense to me ... you can do that on a stock 5sfe with enough octane ...but that doesn't mean you'll make the power you think you'd be making... as far as valve springs...depending on what year 5sfe you're using ...either 3sgte, or 4age, or 2jzge valve springs will drop right in ...some years had smaller valve springs which are compatable with the 4age stuff...and other years had larger springs in which case the 3sgte/2jzge size would fit ...and it's definately an upgrade since all these motors have higher lift cams, and higher redlines... good luck with your project... thanks for the spring info.. as for the psi issue its really not for making high HP numbers at this time.. simply for testing out diffrent parts on a 5s .. basically we are looking to maked the engine fail once built a specific way .. and with the compresion rate of the pistions 20psi will well lets hope cause alot of damage .. -------------------- |
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