Would it be safe to rev a stock itr motor to 9400. This is a daily driven, the only time it would see it that high is at the track. I was just wondering if it would be safe or not.

 

There is a reason why the stock rev limiter is set at 8500.

 

Well yea, but this is going in a EG hatchback, so it would be obd1 running on a pr3 or chipped p28 not sure it.

 

I'd like to know the reason you would like to rev that high? If you have cams that actually make power that high, then im assuming you would have a motor built for it, So my answer to you is no.

 

well, my buddy had a motor built with a mugen ECU and it redlined 9500.

I just don't understand why you guys intend on reving so high when the power doesn't improve all that much.

 

i've taken my stock R motor to 9400 a few times. full bolt on and a nice header.

vafc peak rpm verified. not just 9400 indicated on the cluster. and that was years ago. motor still runs fine to this day.

prolly stopped makin power a tad before 9...but i was runnin on the freeway wasn't paying attention til i looked at the vafc was like

then did it quite a few more times.

lesson. dont rev that high it wont make u power

 

you are taking a big chance with valve overfloat.. an i believe the stock bottom end can't handle revs pass 9500rpms..
8700 rpms should be more then enough, except if you upgrade cams and valvetrain, then i believe you can do 9200 rpms all day long

 

only if you like doing motor rebuilds...

 

8k on the track is good enough sometimes a lil 8400.. and sometimes the cut off maybe, but 9400 with stock valve train is just retarded

 

My engine is fully built and im happy revin at 8000 rpms, even put a limiter in there, why go higher?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by TurboTeG4 &raquo;</TD></TR><TR><TD CLASS="quote">My engine is fully built and im happy revin at 8000 rpms, even put a limiter in there, why go higher?</TD></TR></TABLE>

That's what I like to hear! My valve train is aftermarket...my bottom end is aftermarket. Once the cams are in in the next couple weeks, I'll get it tuned and I can asure you, I'll be doing close to what your doing. I'll probably set my fuel cut off around 8300rpm and my rev limiter at 8400. I really don't see a need to go much higher considering it takes the engine much much more work to make any noticable, usable power.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rev2 9K &raquo;</TD></TR><TR><TD CLASS="quote">Would it be safe to rev a stock itr motor to 9400. This is a daily driven, the only time it would see it that high is at the track. I was just wondering if it would be safe or not.</TD></TR></TABLE>

Go ahead, rev it to 9400 rpm

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Haleiwa-Brando &raquo;</TD></TR><TR><TD CLASS="quote">That's what I like to hear!</TD></TR></TABLE>

I wasn't going to say anything, but he's got a boosted B18C1. Different story.

 

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

I wasn't going to say anything, but he's got a boosted B18C1. Different story.

</TD></TR></TABLE>

Still though...I'm so paranoid about breaking something I feel it's not even worth it to risk revving higher than stock settings. I daily drive this thing so I simply cannot take any chances...even if I happen to make 5hp more up top.

 

Best to wait until you can afford to blow it up again

Figure out what the sputtering/misfire was? Are you waiting for distributor parts?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris F &raquo;</TD></TR><TR><TD CLASS="quote">Best to wait until you can afford to blow it up again

Figure out what the sputtering/misfire was? Are you waiting for distributor parts?</TD></TR></TABLE>

I've narrowed it down to the ignition system. All my testing was yielded great numbers. I'll be replacing the cap and rotor here shortly along with letting the distributor sit in the sunlight to evaporate any moisture that may be in there.

 

i wouldnt rev it that high not just because it's unsafe and stock motor wont make power that high anyways

not worth the risk

 

I won't rev to 9400 on a stock ITR cam...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FutureITR &raquo;</TD></TR><TR><TD CLASS="quote">well, my buddy had a motor built with a mugen ECU and it redlined 9500.</TD></TR></TABLE>



Mugen ECU's have a revlimiter set at 9100 rpm.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FutureITR &raquo;</TD></TR><TR><TD CLASS="quote">I just don't understand why you guys intend on reving so high when the power doesn't improve all that much.</TD></TR></TABLE>

The power does not improve at all. It peaks at around 8000 or so and drops off.

 

you can set your rev limiter to whenever you want with a hondata chip ECU
screw that mugen ECU

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wayne99gsr &raquo;</TD></TR><TR><TD CLASS="quote">you can set your rev limiter to whenever you want with a hondata chip ECU</TD></TR></TABLE>

and?

I'm just correcting his misinformation, that's all. This thread isn't about ECU's.

 

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



Mugen ECU's have a revlimiter set at 9100 rpm.

The power does not improve at all. It peaks at around 8000 or so and drops off.</TD></TR></TABLE>

my bad, what was I thinking, I meant Hondata ECU LOL
and thanks for the info on the powerband. yeah, the power drops off around 8000 on the K20 also w/ reflash.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rev2 9K &raquo;</TD></TR><TR><TD CLASS="quote">Well yea, but this is going in a EG hatchback, so it would be obd1 running on a pr3 or chipped p28 not sure it.</TD></TR></TABLE>

Sorry, but this was too retarded to pass up.

Ok, so now that you've put your b18c5 in a civic, and you're running a different ecu, the valve train has been magically upgraded??

Do you put your pants on backwards sometimes?

 

If you want to be slower and break stuff so you can impress chicks with your mizzad rpm skillz then yes please rev it to 9,400rpms.

 

maybe occasional 9000-9100rpm, but even at that you're not making any hp.. don't see a point.