ls_bitik

I was wondering if an lsvtec can handle 9000 rpm? Its rebuilt with arp rod bolts and itr headbolts. 13.82 compression

HyperX

does you cams even make power that high?

ls_bitik

I have stage one. I didn't get it tuned yet.

accordin 2 me

nope, it sure cant not unless you would like a piston thru your block, the only downside to ls/vtec is the fact that its still an ls bottom end, its not meant to be rev'd that high...my best friend spend 9 grand on his ls/vtec to be fully built from the rooter to the tooter and i warned him not to have the redline set past 8, he set it at 86 and 2 weeks later a nice wiseco was saying hello to the radiator.

Dunc

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by accordin 2 me &raquo;</TD></TR><TR><TD CLASS="quote">nope, it sure cant not unless you would like a piston thru your block, the only downside to ls/vtec is the fact that its still an ls bottom end, its not meant to be rev'd that high...my best friend spend 9 grand on his ls/vtec to be fully built from the rooter to the tooter and i warned him not to have the redline set past 8, he set it at 86 and 2 weeks later a nice wiseco was saying hello to the radiator.</TD></TR></TABLE>
Way too many variables in your friends story. Was it tuned? Define "built". Was it just wiseco pistons? Or was it rods/pistons/block girdle/etc? Having it blow a mere 2 weeks later is screaming something wasn't right to me. Whether it was the building process or the tuning (I opt for the later).

With a properly built engine and a well tuned engine then it is completely fine to rev to 9000rpm on an ls/vtec provided it's even worth while (making power). My ls/vtec is my 24/7/365 daily driver. It has 460whp on 17psi and has been running for 3 years on this setup revving to 8500-9000rpm (depending on when I shift haha). I voluntarily rebuilt the engine because I felt like it 3 years ago haha. It had been running for an additional 2 years prior to that at 9000-9200rpm. So yes, it can do it and still live.

thevtecnician

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dunc &raquo;</TD></TR><TR><TD CLASS="quote">Way too many variables in your friends story. Was it tuned? Define "built". Was it just wiseco pistons? Or was it rods/pistons/block girdle/etc? Having it blow a mere 2 weeks later is screaming something wasn't right to me. Whether it was the building process or the tuning (I opt for the later).

With a properly built engine and a well tuned engine then it is completely fine to rev to 9000rpm on an ls/vtec provided it's even worth while (making power). My ls/vtec is my 24/7/365 daily driver. It has 460whp on 17psi and has been running for 3 years on this setup revving to 8500-9000rpm (depending on when I shift haha). I voluntarily rebuilt the engine because I felt like it 3 years ago haha. It had been running for an additional 2 years prior to that at 9000-9200rpm. So yes, it can do it and still live. </TD></TR></TABLE>

X2

it depends on the way it was built, and you shouldn't rev it that high on stock rods. And if yur untuned you really shouldn't be revving that high anyway. If you lean out at that rpm you're done for

ls_bitik

i was just curious... i have p30 piston and .40 shaved head.

VTEC_PRODUCTION

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ls_bitik &raquo;</TD></TR><TR><TD CLASS="quote">i was just curious... i have p30 piston and .40 shaved head.</TD></TR></TABLE>

how are you achieving that type of compression then?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ls_bitik &raquo;</TD></TR><TR><TD CLASS="quote">I was wondering if an lsvtec can handle 9000 rpm? Its rebuilt with arp rod bolts and itr headbolts. 13.82 compression</TD></TR></TABLE>

I AM WEASEL

iTrader: (1)

I think that you mean your head has been milled .040 not .40 and my compression calculator gives this setup about 13.5cr so 13.82 is possible

VTEC_PRODUCTION

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by -DC4- &raquo;</TD></TR><TR><TD CLASS="quote">I think that you mean your head has been milled .040 not .40 and my compression calculator gives this setup about 13.5cr so 13.82 is possible</TD></TR></TABLE>

so i take this wont be a DD huh?

ls_bitik

its my only car! 24/7 365 daily car!! hehe

I AM WEASEL

iTrader: (1)

for it being a dd, it is possible with a good tune(but who knows what his setup is as there are way to many viriables). as for 9000 now, I highly doubt that a set of stage ones will make power that high so it would be pointless to do so - just hurting the motor.

ls_bitik

like what is the best rpm to shift??

DA_9

8200 at the latest. I had a LSVTEC wit 11.1 compression pistons blow on me at 9200 RPM. So unless ur sleeving it and building the head and dumping a **** load of cash into it, dont go past 8,200 rpm. Trust me wit ur compression pistons it will be good enough to get some good power. U won't make power to 9k anyway. Ud need like a built head, go to TODA and get their package for like 2 grand with valves retainers and ****. Then go sleeve your block by eagle, get some JE pistons, and ARP rods and rod bolts (4 grand) Turbo it and hit 9k all day every day.

dc2-slow

dudong

I AM WEASEL

iTrader: (1)

you need to do a lot more research before you dump any money into your motor, your route seems that it wont last very long and you will just be wasting money. Find out what parts work well together and build accordingly.

SkaiWu

how will a usdm gsr engine w/ a increased redline run? mine was increased 2-4kmaybe?

so 8.3k stock and its now its somewhere between 8.3-9k i dont wanna check the limit to find out either

yjischoking

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SkaiWu &raquo;</TD></TR><TR><TD CLASS="quote">how will a usdm gsr engine w/ a increased redline run? mine was increased 2-4kmaybe?

so 8.3k stock and its now its somewhere between 8.3-9k i dont wanna check the limit to find out either</TD></TR></TABLE>

your car redlines stock at 8100 not 8300. and increasing the redline doesnt do jack when your car is stock except blow your motor quicker.

Dunc

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ls_bitik &raquo;</TD></TR><TR><TD CLASS="quote">like what is the best rpm to shift??</TD></TR></TABLE>
^^^Well if DA_9 was answering this question in his/her reply then you might really want to read the next paragraph as well. Short answer is that 8200 is taking a wild stab in the dark at where the best rpm to shift is for you. It's impossible for DA_9 to give you an exact answer like that because there is no provided dyno graph. That's the only thing you should listen to. Graphs don't lie (assuming setup right haha) and people make assumptions. Get it dynoed and then you'll know the best rpm in which to shift.

Well here's some food for thought:
Apparently others in here believe 9000 is unachieveable for an ls/vtec. I said it is <U>if</U> built and tuned properly....that doesn't mean built to the sky and back. A simple setup such as rods/pistons and a valvetrain is plenty to run your 9000rpm. Sleeves are not needed to run 9000rpm. Sleeves aren't even needed to run 400hp so for your wallet's sake, please run from the people who tell you that you have to sleeve the motor.
What I find funny is that people are just arbitarily throwing figures out saying it shouldn't go over XXXXrpm. Why do I think it's strange? Well because we don't know if your engine is built well enough or if your intentions are to build it. So how can someone honestly give an rpm figure when they don't have all the facts about your setup? Hmmmm how convienent

ls_bitik

tanks for the good input... ill prolly just get it dynoed to get the most of it.. and add 2 step. hehe

numberone

iTrader: (2)

Better get some real head bolts.

ls_bitik

i already got itr head bolts... do i need a better one?

DA_9

yeah a 2 step will help u launch, and depending on where ur vtec line is (mine is set at 4,900 RPMS) you can do some good damage. There's a thread going about a 2step if u want more info.

https://honda-tech.com/zerothread?id=2241131