I know its only an additional 500 rpms, but how strong do you think the valve train is in this new k20z3? Like how much more will it stress the valvetrain going that little bit higher. I'm refereing to the raised redline from the hondata reflash.

 

Well, here is what I have been told my the race mechanics that work on my car.

The Honda K20 motor is 90% over engineered. That means 90% of the parts can handle the added rev's no problem. 10% of the parts cannot. That is not saying something will break, but saying more it will cause premature wear that "could" result in a failure much sooner than expected.

It's like slapping a Turbo or Supercharger on the motor, 90% of the engine can take the added power, but 10% of the parts "should" be upgraded before or during the install.

Unfortunately, one of the parts he mentioned was piston rings.

Anyway, it's a risk anyway you go. If your engine breaks at ANY rpm in excess of the factory set rev limit in the ECU, your warranty is toast.

As for myself, I will probably get the reflash once a Header/Cat combo comes out. With that said, I will probably not ever take the revs over 8,000. I want the reflash more for the V-tec reset to 4,500. Once a proven Turbo or Supercharger is released, I will plan on having the 10% of parts upgraded (including the upper camshaft) when I have the turbo/supercharger installed.

Just some food for thought

 

if your gonna go turbo, then why spend hella money NOW on header/exhaust/reflash? the reflash isn't for turbo, only NA

but to the OP, sorry, i have no clue :shrugs:

 

not rute as teh reflash has nothing to do with fuel yeah maybe a little timing but that can be solved and by the time a decent turbo kit comes out there will be some type of reflash for it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hellzcivic &raquo;</TD></TR><TR><TD CLASS="quote">Well, here is what I have been told my the race mechanics that work on my car.

The Honda K20 motor is 90% over engineered. That means 90% of the parts can handle the added rev's no problem. 10% of the parts cannot. That is not saying something will break, but saying more it will cause premature wear that "could" result in a failure much sooner than expected.

It's like slapping a Turbo or Supercharger on the motor, 90% of the engine can take the added power, but 10% of the parts "should" be upgraded before or during the install.

Unfortunately, one of the parts he mentioned was piston rings.

Anyway, it's a risk anyway you go. If your engine breaks at ANY rpm in excess of the factory set rev limit in the ECU, your warranty is toast.

As for myself, I will probably get the reflash once a Header/Cat combo comes out. With that said, I will probably not ever take the revs over 8,000. I want the reflash more for the V-tec reset to 4,500. Once a proven Turbo or Supercharger is released, I will plan on having the 10% of parts upgraded (including the upper camshaft) when I have the turbo/supercharger installed.

Just some food for thought
</TD></TR></TABLE>


From what i understand, piston rings will fail with a supercharger/turbo b/c of the additional positive pressure in the motor. As for an extra 500 rpms i dont think the piston rings would fail nor have anything to do with the rings. I was more less concerned with the valve springs / retainers....considering this is normally what you upgrade when you want to raise your rev limit and / or go with bigger cams. So my main question is ... on a scale of 1-10 how good are our stock springs / retainers for revs?....or in this case adding 500rpms?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SeanJohn1802 &raquo;</TD></TR><TR><TD CLASS="quote">if your gonna go turbo, then why spend hella money NOW on header/exhaust/reflash? the reflash isn't for turbo, only NA

but to the OP, sorry, i have no clue :shrugs:</TD></TR></TABLE>

For under $1500 (with the right prices), you could have the headers/ exhaust and reflash added. The gains are signifigant, especially midrange. To me well worth it. Just waiting for more options on headers and the exhaust will be added later this year. Reflash soon after that.

If you add the turbo or supercharger after that is done, you are looking at some really nice HP/torque gains overall.

 

back to topic please...

 

Seems like nobody has any knowledge on this topic...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hellzcivic &raquo;</TD></TR><TR><TD CLASS="quote"> Unfortunately, one of the parts he mentioned was piston rings.</TD></TR></TABLE>

I sure hope you mean for the boost part of your post.

...Because revving an engine 600 RPM higher won't do anything to the piston rings.

 

Just Be careful..
I don't want to compare a Ford with a Honda.. (and SI). but I had a Taurus before, and with 300rpm + the "red-line" I lost my engine..

 

Honda engines are FAR better engineered than Ford Taurus engines.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D-Rob &raquo;</TD></TR><TR><TD CLASS="quote">Honda engines are FAR better engineered than Ford Taurus engines. </TD></TR></TABLE>

x2

There is no comparison between the 2.

 

x3

 

Hondata told me that the stock tach in the car what is about 300rpm off from what the real rpm is as a safety method. So really, we're just achieving what we were meant to. That was at least true for the rsx. Put an aftermarket tach on the car and it reads different than the tach on the dash.

 

Finally some decent info...thanks for adding to the post.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SpoolnG2 &raquo;</TD></TR><TR><TD CLASS="quote">Finally some decent info...thanks for adding to the post.</TD></TR></TABLE>
well don't go bouncing off 9000 thinking your only hitting 8700, its still more stress than the factory intended and it will break. It's not safe, but its tolerable.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SpoolnG2 &raquo;</TD></TR><TR><TD CLASS="quote">Seems like nobody has any knowledge on this topic...</TD></TR></TABLE>

Kowledge.....

To my Knowledge the car doesnt make much if any power past its redline, so why toy with it?

Honda engineers have designed the motor with a power curve to meet its current redline. Toying with the redline isnt going to improve results unless your building the motor.

 

I obviously know all of the stuff you guys have just said. I said obviously nobody has any knowledge b/c people were making vague statements such as "honda engineered a good motor"...then people would post x2...x3...etc. Ive been around the honda industry and built turbo charged motors etc long enough to know all this. I was just curious if anyone had any info on the durability of the specific springs / retainers that were in this motor, since it is new.

 

I'm no expert, but the only difference between the K20Z3 vs. K20A2(rsx-s) is the intake manifold and e-throttle, isn't it? I would assume 8600 rpm is safe, since the rsx people have been running this high for a while.

 

exactly what i was looking for...thanks

 

dunno if the z3's internals are any diff from the a2 but mine blew at 9100rpm according to acura ..id be careful with it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SpoolnG2 &raquo;</TD></TR><TR><TD CLASS="quote">Seems like nobody has any knowledge on this topic...</TD></TR></TABLE>

posted it in wrong section thats why...the z3 can handle 8600...but if it were up to me..i would get some ips cams and eibach valve springs...and take her to 9000...

 

Thanks for the info....btw, i love your name

As for cams and such...we barely have any headers or exhausts to accomodate those cams...let alone a way to tune them. Thanks for your knowledge though.

 

if you want an affordable upgrade to valve springs btw, you can use the s2k's valve springs as they drop right in and with some nice cams you can bounce off 9k all day long Think they run around $60 if you know where to look too!

 

I'm not really looking to do anything like that, I was just curious since the motor is new, what kinda revs it could handle stock. Also since the hondata reflash raises the revs to 8600.