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would a stock b20vtec take about 8 pounds of boost? going to like 7600k

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Old Oct 29, 2004 | 09:02 AM
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Default would a stock b20vtec take about 8 pounds of boost? going to like 7600k

i was wondering if a stock crvtec woudl take about 8 pounds of boost? or will it just fall on its face on me. only going to about 7600-7800 rpms...
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Old Oct 29, 2004 | 12:12 PM
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Default Re: would a stock b20vtec take about 8 pounds of boost? going to like 7600k (kinkbmx159)

Probably not with those kind of RPM. Likely a rod or rod bolt failure in it's future...
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Old Oct 29, 2004 | 12:22 PM
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didn't you already make a thread about this? don't worry about how high you're going to rev. worry about how much power you're going to make, and how reliable your setup is going to be.

cheap. reliable. fast.
pick two.
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Old Oct 29, 2004 | 12:31 PM
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Default Re: (MugenDude)

The way things have been with me lately, I've picked none.
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Old Oct 29, 2004 | 01:07 PM
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Default Re: (drdisco69)

umm the last post was about nos this one is about boost. cuz my friend cant choose one.
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Old Oct 29, 2004 | 01:31 PM
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i've heard that ~6 psi is all you're going to want to put on a stock b20 if you want it to stay reliable. all the info you need is in past threads.
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Old Oct 29, 2004 | 07:26 PM
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Default Re: (MugenDude)

thanks man
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Old Oct 29, 2004 | 07:53 PM
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Default Re: would a stock b20vtec take about 8 pounds of boost? going to like 7600k (Cynical 1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cynical 1 &raquo;</TD></TR><TR><TD CLASS="quote">Probably not with those kind of RPM. Likely a rod or rod bolt failure in it's future...</TD></TR></TABLE>more like the sleeves...
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Old Oct 29, 2004 | 08:02 PM
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Default Re: would a stock b20vtec take about 8 pounds of boost? going to like 7600k (DEVIOUS_EF*)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DEVIOUS_EF* &raquo;</TD></TR><TR><TD CLASS="quote">more like the sleeves... </TD></TR></TABLE>

More like the stock sleeves are good for a lot more than people give them credit for.

https://honda-tech.com/zerothread?id=992923
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Old Oct 30, 2004 | 01:02 AM
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Default Re: would a stock b20vtec take about 8 pounds of boost? going to like 7600k (Cynical 1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Cynical 1 &raquo;</TD></TR><TR><TD CLASS="quote">Probably not with those kind of RPM. Likely a rod or rod bolt failure in it's future...</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DEVIOUS_EF* &raquo;</TD></TR><TR><TD CLASS="quote">more like the sleeves... </TD></TR></TABLE>

The stock valvetrain is usually one of the first things to go when the RPMs get too high. The stock valvesprings are too weak for high RPMs. Why? Because the rocker arms, which are connected to the valves/valvesprings, will start to jump off of the cam lobes (valve float), kinda like riding a skateboard off of a ramp. Therefore, the valves aren't following the cam specs, the 4-stroke cycle is thrown off, and **** breaks. BAM! NOOOO!

This is just one of the many things you have to consider when you want to rev high.


Modified by MugenDude at 5:33 AM 10/30/2004
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Old Oct 30, 2004 | 05:51 AM
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Default Re: would a stock b20vtec take about 8 pounds of boost? going to like 7600k (MugenDude)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MugenDude &raquo;</TD></TR><TR><TD CLASS="quote">

The stock valvetrain is usually one of the first things to go when the RPMs get too high. The stock valvesprings are too weak for high RPMs. Why? Because the rocker arms, which are connected to the valves/valvesprings, will start to jump off of the cam lobes (valve float), kinda like riding a skateboard off of a ramp. Therefore, the valves aren't following the cam specs, the 4-stroke cycle is thrown off, and **** breaks. BAM! NOOOO!

This is just one of the many things you have to consider when you want to rev high.


Modified by MugenDude at 5:33 AM 10/30/2004</TD></TR></TABLE>

The stock vtec valvesprings are fine at 7,600 rpms, its the sleeves that would take the hit. Especially with the boost. Also the rods and bolts are another weak link when combing boost with high rpms.
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Old Oct 30, 2004 | 10:07 AM
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Default Re: would a stock b20vtec take about 8 pounds of boost? going to like 7600k (Used2beAb16)

keep it coming guys. learning alot
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Old Oct 30, 2004 | 10:58 AM
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Default Re: would a stock b20vtec take about 8 pounds of boost? going to like 7600k (kinkbmx159)

thats the setup i'm running right now... stock b20b bottom (new rings), gsr head, with greddy kit for gsr.. right now it hits about 7-7.5 psi. I haven't run it hard yet because i'm thinking the 310cc injectors might be a tad bit small.. so I'm saving for some 370cc which should be good for that about (7-7.5 psi)... also i'm running the blue box that everyone loves to hate on, but i've had nothing but good luck with it... once i start running it hard i've planned on shifting around 7-7.5 rpms to be some what safe...

mods: b20b,gsr head w/ portflow springs & retainers, apexi n-1 cat back, act clutch and prolite flywheel, unothrodox 3- piece pulleys, greddy gsr kit, and every thing else is pretty much stock..
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Old Oct 30, 2004 | 04:59 PM
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Default Re: would a stock b20vtec take about 8 pounds of boost? going to like 7600k (black98gsr-t)

nice setup man good info
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Old Oct 30, 2004 | 06:01 PM
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Default Re: would a stock b20vtec take about 8 pounds of boost? going to like 7600k (kinkbmx159)

mmmm....there is a bunch of ''think they know it all'' posting here...
the durability of the sleeves; wich is why people diss b20's; is going to depend in your tuning.
there is people running lots of power on stock sleeves and there is also people that their sleeves cracked with..well not a lot of power.

For added insurance you should look into posting the block.
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Old Oct 31, 2004 | 08:11 AM
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Default Re: would a stock b20vtec take about 8 pounds of boost? going to like 7600k (mmuller)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mmuller &raquo;</TD></TR><TR><TD CLASS="quote">mmmm....there is a bunch of ''think they know it all'' posting here...
the durability of the sleeves; wich is why people diss b20's; is going to depend in your tuning.
there is people running lots of power on stock sleeves and there is also people that their sleeves cracked with..well not a lot of power.

For added insurance you should look into posting the block.</TD></TR></TABLE>

I agree, Ive seen b20 sleeves crack on all motor setups from inadequete tuning, so throwing boost in there can just multiply the likelyhood/severity of this event.
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