AntiochOG

I have a 95 cx with a d16a6 running off the stock cx ecu. I'd like to change my ecu because I don't like having a redline at 5700 and I'd also like to run a 4 wire o2 sensor instead of the 1 wire I have.
I believe the right ecu to run is a p06 (let me know if thats wrong), however the redline on the p06 is 6800, and the d16a6 was built to redline at 6200. I'm guessing honda knew what they were doing and the engine shouldn't be run above 6200, but rather than spending money to limit the ecu to 6200 if I could make the car safely rev to 6800 that would be better.
What is needed to safely rev to 6800, I'm guessing valve springs, what else?

(and if I got anything wrong like what ecu to run or redlines or whatever let me know)

Thanks

4DRmafia

actually my old a6 motor i had in my ef hatch and it was running a pm6 si ecu if i am correct for odb0 and it redline at 7200.

Minglor

dont.

Why do you want to rev to 6800?

Are you another honda boi that thinks the higher you rev the more power you make?

4DRmafia

well the stock rev limit on a a6 is 7200

AntiochOG

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

Why do you want to rev to 6800?

Are you another honda boi that thinks the higher you rev the more power you make?</TD></TR></TABLE>

No. I want to rev to 6800 safely because I want the rev limit of the ecu and the ability of the engine match up so I don't break anything.
But admitedly reving at 5700 is no fun, and guy who dynoed my car said that my powerband was still climbing steeply at redline and if I raised the redline to 6200 I would probably make about 10 more hp.
And the last reason is the with my really long cx gear ratios the higher rpm I can shift at the better because right now when I shift from the top of 1st into 2nd I'm at about 2500 rpm and that means I have no power. (Yes I know a different transmission would be a good idea, but I do love my gas mileage.)

AntiochOG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SkipMic2006 &raquo;</TD></TR><TR><TD CLASS="quote">well the stock rev limit on a a6 is 7200</TD></TR></TABLE>

Thanks, I made the mistake of looking at the RPM where peak hp was made and assuming that was the redline. So I guess problem solved.

sol2hatch

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

Why do you want to rev to 6800?

Are you another honda boi that thinks the higher you rev the more power you make?</TD></TR></TABLE>

ummmm, most honda engines make peak power at above 7000rpm. I cant speak for his particular case, but he didnt make an absurd suggestion. get off his back.

silly noob

OP: you can chip your ECU, or buy one that has been chipped already. I know there is some sponsors on this site that offer that service. Look into that. It will let you set your engine to the settings you choose, redline and all.

EG2Driver

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AntiochOG &raquo;</TD></TR><TR><TD CLASS="quote">
But admitedly reving at 5700 is no fun, and guy who dynoed my car said that my powerband was still climbing steeply at redline and if I raised the redline to 6200 I would probably make about 10 more hp.
</TD></TR></TABLE>

bullshit. Honda would have made its redline higher if it still made power, wouldn't they? Hondas are built the way they are for a reason, unlike American cars...they have redlines for a reason. Don't fiddle with it.

4DRmafia

yeah 7200 like i said

sol2hatch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DeadEnd9009 &raquo;</TD></TR><TR><TD CLASS="quote">

bullshit. Honda would have made its redline higher if it still made power, wouldn't they? Hondas are built the way they are for a reason, unlike American cars...they have redlines for a reason. Don't fiddle with it.</TD></TR></TABLE>

did you read the whole original post? he just wants to raise the redline to the engines capability. He just needs to get a new ecu to run the engine he has. His ECU is an econo ECU for the d15b7 (or 8, i dont remember), and his engine now is a d16a6, which has a higher rev limit. There is no problem with what he is proposing, unless I missed something

AntiochOG

Thanks SkipMic2006. That definately makes want to switch out my ecu knowing I've got another 1500 rpm I can safely use.

4DRmafia

yeah no plm i love my old a6 i had. strongest block i hear.

hondmywrld

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

Why do you want to rev to 6800?

Are you another honda boi that thinks the higher you rev the more power you make?</TD></TR></TABLE>

Are u suggesting that at higher rpm u don't get more power, which is some case u need?

how about when u want to pass someone u drop down a gear or two and the extra gain in rpm or &lt;u pressed the gas so much u downshifted(4 autos)&gt;, don't give u an extra push and even feel a little more power?

Syndacate

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DeadEnd9009 &raquo;</TD></TR><TR><TD CLASS="quote">

bullshit. Honda would have made its redline higher if it still made power, wouldn't they? Hondas are built the way they are for a reason, unlike American cars...they have redlines for a reason. Don't fiddle with it.</TD></TR></TABLE>

Not necessarily. It becomes the cost of revving harder opposed to what it would cost per unit to up the internals in the eyes of the manufacturer. On one hand sometimes there's no use in revving up to a certain RPM due to the power band dropping off, on the other hand sometimes the power band can continue, but it would cost more to extract a certain number of HP to raise the peak and then they have to ask the question: "Is using X internals instead of Y to safely change the redline worth it for the extra Z amount of HP?"

My boss's Viper has a pretty steep pitch on the dyno chart at 6k. Though it's also a supercharged hennessy, so it's kinda comparing apples to oranges, but the idea still applies.

ley

instead of trying to raise your redline just buy an ap1 s2000, redlines at 9300 , and no honda makes a more impressive sound in vtec than the s2000

AntiochOG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DeadEnd9009 &raquo;</TD></TR><TR><TD CLASS="quote">bullshit. Honda would have made its redline higher if it still made power, wouldn't they? Hondas are built the way they are for a reason, unlike American cars...they have redlines for a reason. Don't fiddle with it.</TD></TR></TABLE>

Here's a picture of my dyno graph. You can see that there is no sign of the hp starting to drop off when the fuel cutoff happens.

4DRmafia

yep 7200 should take u around 108hp at least for a a6

Syndacate

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

Here's a picture of my dyno graph. You can see that there is no sign of the hp starting to drop off when the fuel cutoff happens. </TD></TR></TABLE>

I've never seen somebody get a stock CX w/ a stock A6 getting dyno pulled.

Can I ask why? Do you just have money to waste? How much did that little trip to the dynometer cost? 200, 300 bucks?

Hybrid96EK

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sol2hatch &raquo;</TD></TR><TR><TD CLASS="quote">

ummmm, most honda engines make peak power at above 7000rpm. I cant speak for his particular case, but he didnt make an absurd suggestion. get off his back.

silly noob

OP: you can chip your ECU, or buy one that has been chipped already. I know there is some sponsors on this site that offer that service. Look into that. It will let you set your engine to the settings you choose, redline and all. </TD></TR></TABLE>

Incorrect. Most Hondas make peak power below this point. The torqueless wonder commonly known of as the B16 is the exception. The only other ones that make dick for power this high are the R series engines and the S2k.

AntiochOG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Syndacate &raquo;</TD></TR><TR><TD CLASS="quote">I've never seen somebody get a stock CX w/ a stock A6 getting dyno pulled.

Can I ask why? Do you just have money to waste? How much did that little trip to the dynometer cost? 200, 300 bucks?</TD></TR></TABLE>

I got my car dynoed mainly because I thought it was running rich, so I wanted to see if that was the case, and how bad it was. Plus I had just bought the car and was curious to see what it would make. And it gives me a good baseline so I can see what kind of improvements I have made later on.

And it cost $75 at Torque Freaks in Portland, Or.


Modified by AntiochOG at 12:46 PM 1/10/2007

sol2hatch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hybrid93Eg &raquo;</TD></TR><TR><TD CLASS="quote">

Incorrect. Most Hondas make peak power below this point. The torqueless wonder commonly known of as the B16 is the exception. The only other ones that make dick for power this high are the R series engines and the S2k.</TD></TR></TABLE>

ok, so not above 7000, my mistake, but what, 6200-6800, still above 5700.