Supposedly power will peak around 9.2K on my build so I want to rev up to at least 9.5k safely on a daily basis. What is the revving limit of a stock type-r block (B18C6)? Is it safe to rev it to 9.5K? If not, what should be replaced at a minimum? How about ARP rod bolts? How much does that increase the revving limit? Can I use ARP bolts with stock rods at all? Any input on this would be much appreciated, thx.

 

what is your head set up? its not stock like your block is???

 

Plans for the head:

ported and milled ~11.5 cr
RM M22x cams + RM SL valvetrain

Bolt-ons I already have:

Comptech Icebox + K&N filter
IB Spec ported type-r IM
Rage V1 header
SMSP 2.5" exhaust
P28 + CROME management

 

find out where power will peak at first. then rev accordingly.

but to answer your question, there are guy's in the type r forum who rev to 9-9.5k on internally stock b18c5's. they dont do it often, but they've done it.

 

on a stock head??? is any power being made up there??? if there was wouldnt honda have used better internals to take advangtage of that extra power?

 

https://honda-tech.com/zerothread?id=1820688

there are other reasons to rev that high, as george knighton explains

 

i want to know as well. can a 100% stock jdm itr block rev to 9500 occasionally without a KABOOM? hehe

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CXtypeR &raquo;</TD></TR><TR><TD CLASS="quote">i want to know as well. can a 100% stock jdm itr block rev to 9500 occasionally without a KABOOM? hehe</TD></TR></TABLE>

read the link

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr_henrik &raquo;</TD></TR><TR><TD CLASS="quote">
RM M22x cams + RM SL valvetrain
IB Spec ported type-r IM
</TD></TR></TABLE>
No reason to rev your setup that high. Those cams and that intake manifold will peak around 8,200. You shold make some very good power though


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr_henrik &raquo;</TD></TR><TR><TD CLASS="quote">Supposedly power will peak around 9.2K on my build so I want to rev up to at least 9.5k safely on a daily basis. </TD></TR></TABLE>

 

You sure about that? My stock motor peaks at around 8200 with that header and manifold. Also Aquafina told me with the cams it would peak at 9200. I see yours peak at 8200 with M22 but do you have a headwork done? I think at this point it all comes down to the quality of the headwork where the power will peak. Because the cams have the potential to make power up to 9200. But I may be wrong.

Also if it won't peak at 9200 just at say 8800, it's still reasonable to rev up to 9K+.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BABY NSX &raquo;</TD></TR><TR><TD CLASS="quote">
If you are using cams that peak at 8500RMP then its completely legitimate to ask if the engine will be strong enough to go to 9500RMP, because if you want to be accelerating as quickly as possible then your going to want to spin the engine well above where it makes peak power.</TD></TR></TABLE>

 

Reading through other threads it seems that 9300-9500 MAY be safe. Does it make sense to change the stock rod bolts to stronger ARPs for a greater safety?

 

You are too focused on revving your motor to the sky and not finding out where your power band is going to be at. B19COUPE posted a graph of basically what your building. Even if Moses ports your head its still no need to rev it to 9500, you sound rev happy my friend. Your bearings will thank you for it later.

 

agree goforbroke your bearings will say goodbye to you in a couple of revs. hey, dont make the same mistake my brother in law did to his LS-VTEC he thorn the motor apart and just throw in some new bearings and JDM ITR pistons and thought he could rev it to 10,000 and KABOOOOOMMM!!! he just locked and busted his bearings.

 

Finding out where my power band is going to be, that's what I'm trying to do here. And that graph unfortunately doesn't show us what happens after 8500, so it's not too informative. BTW, power doesn't seem to drop at all at 8.5K...

 

Sorry, but this is no LS/VTEC this is a type-r. I wouldn't compare stock LS rods to type-r rods but maybe that's just me.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr_henrik &raquo;</TD></TR><TR><TD CLASS="quote">And that graph unfortunately doesn't show us what happens after 8500, so it's not too informative.</TD></TR></TABLE>
It peaks at 8250 or so. Look at the torque graph and take a wild guess what the power does after 8,500. That motor had a head ported by Rocket. My own motor peaks at 8,250 or so with an IB ported ITR intake manifold and Skunk Pro 2's. With a JG sheetmetal intake manifold and running an SMSP 4-1 header (open header) the same motor (mine)peaks at ~ 9,000. If you are dead set on taking the motor to 9,500, get an intake manifold that will make power at that RPM. Otherwise you are just spinning your wheels.

 

No, you get me wrong I'm not dead set on taking the motor to 9,500. It's just that I was told it will peak around 9,2K and that's why I wanted to rev to 9.5K. I'd me more than happy if it would peak around 8.2K so I wouldn't have to to touch the block at all.

 

i get what this guy is saying. i think like that too.

if the motor peaks at 9200, i also would want to spin it higher to 9500. why? because the higher you rev the engine, the higher you will end up in the powerband when you shift. higher in the powerband = more power

 

11,233rpms

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itr_henrik &raquo;</TD></TR><TR><TD CLASS="quote"> It's just that I was told it will peak around 9,2K </TD></TR></TABLE>
Hmmm-you might want to find another source of information
This is a graph of my personal motor. No matter what cams or intakes I use, the intake manifolds seem to dictate the location of the peak power. Trust me when I say that I have spent a great deal of time on the dyno. Look at the peaks.



Here is a purpose built B-series race motor on Methanol:

Not mine
It peaks at 8,500.



Modified by b19coupe at 5:18 PM 11/27/2006

 

mr b19coupe

m22x were used on the 1st sheet with the jg vs ib?

 

My motor was running Skunk Pro 2's.

 

ive heard some people running m22x on a bone stock b18c5 having peak at around 88-9200

if a stock itr im can do that, i dont see why a ported one will change it so much to limit the peak

 

Show me some graphs-not what you have heard. The stock ITR and Ported ITR manifolds peak at about the same rpm. Cams, headers, exhausts, and head porting can all affect the peak-but when all else is dialed the limiting factor is the intake manifold.

 

My personal experience running stock B18C5 block on track/road race, shifting at 8600rpm with occasional 9000rpm for 10 lap race (bout 56km) with no problem. But tried once on consistent 9200rpm for 10 lap race and the wear and tear was severe!!

Did another endurance track race with consistent shifting at 8300rpm for 8 hours and no engine problem.

So my experience tells me, stock B18C5, consistent rev to 8500rpm everyday should be very safe and occassional 9000rpm is ok.

Anything above 9000rpm you are looking for trouble with severe wear on your bearings and piston rings.