Hi,

I'm looking into tuning a ZC DOHC......or as it's known in the UK a D16A9. I realise the B series has more tuning potential.......but due to the class of racing (hillclimbing) I'm wanting to enter..........the D series is the better option due to weight etc.
The engine has to be n/a and wondered what sort of power figures these engines had achieved??

Thanks

 

Problably better off swapping in an Intregra LS motor. You'ss have more trq for the hillclimb.

 

if you gotta go NA, run a k20 with 13:1 pistons

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">if you gotta go NA, run a k20 with 13:1 pistons </TD></TR></TABLE>wtf does that have to do with a ZC

I would also like to see what kind of numbers people have got from a zc

 

it was a joke.....Ive seen ZC's NA up to about 330 whp and 285 ft lbs of torque, id have to find the dyno sheets, got em round here somewhere... They have good potential, but the biggest downside of these motors is the weak valvetrain and shitty stock rod bearings...but if you can take care of that, their great motors

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">Ive seen ZC's NA up to about 330 whp and 285 ft lbs of torque, id have to find the dyno sheets, got em round here somewhere... </TD></TR></TABLE>

I'll believe that when I see it.

 

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

I'll believe that when I see it.</TD></TR></TABLE>


I wouldn't even believe it if I saw it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">it was a joke.....Ive seen ZC's NA up to about 330 whp and 285 ft lbs of torque, </TD></TR></TABLE>
...do you know what N/A stands for?

To the poster, PM jiliCRX, they have a great dual carb N/A DOHC ZC on theire site.

 

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


I wouldn't even believe it if I saw it.</TD></TR></TABLE>
You and me both

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">it was a joke.....Ive seen ZC's NA up to about 330 whp and 285 ft lbs of torque, id have to find the dyno sheets, got em round here somewhere... They have good potential, but the biggest downside of these motors is the weak valvetrain and shitty stock rod bearings...but if you can take care of that, their great motors</TD></TR></TABLE>
sure dick I think you mean ^^this post was a joke

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">it was a joke.....Ive seen ZC's NA up to about 330 whp and 285 ft lbs of torque, </TD></TR></TABLE>

No you haven't.

 

The best N/A DOHC ZC setup I've ever seen...
http://www.zcspeed.com/racecar.htm

I'd trade my Turbo setup for it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Autoworks &raquo;</TD></TR><TR><TD CLASS="quote">The best N/A DOHC ZC setup I've ever seen</TD></TR></TABLE>

I'd seen their site and the car.......but again wondered what sort of power was being produced.

The Weber 45s are used quite regularly over here.

I'd ideally like to be in the region of 180-190bhp (flywheel) to compete with the class leaders. How easy and costly (for the people that have tuned the ZC) would it be to get to somewhere near that figure??

People in the UK say its not possible to get past about 170ish and it would be very costly as the parts for this engine simply aren't available.

 

our DOHC ZC is basically stock except for the camshafts and the carbs - it only puts out around 150whp corrected to sea level and at the altitude that we run at (around 5000ft) it only puts out about 125whp - i think with a lot of experimenting and working with it, you could get close to 200whp NA, but that would take a lot of time and money to find the right combination - 180-185whp is probably in the realm of possibility, but still would take a lot of experimenting - 170 wouldn't be that hard to get - the stock DOHC ZC is rated at around 130hp, which is the same as a D16Z6, but if you look at actual dyno charts for both engines you will see that the D16Z6 puts out about 110whp and the DOHC ZC puts out about 120whp - obviously they can't be the same

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">it was a joke.....Ive seen ZC's NA up to about 330 whp and 285 ft lbs of torque, id have to find the dyno sheets, got em round here somewhere... They have good potential, but the biggest downside of these motors is the weak valvetrain and shitty stock rod bearings...but if you can take care of that, their great motors</TD></TR></TABLE>

what did you smoke right before you wrote that?

maybe if someone mated two of them and made an 8 cyl zc......BBwhahahahahahahahahahahahahha

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlicrx &raquo;</TD></TR><TR><TD CLASS="quote">180-185whp is probably in the realm of possibility, but still would take a lot of experimenting - 170 wouldn't be that hard to get </TD></TR></TABLE>

Sorry to sound stupid...........but I take it by "whp" you mean wheel horse power, power at the wheels?? If that's the case.......do you work on approx 20% transmission loss to work out power at the flywheel??

I've read a few times that the flowrate of the standard ZC head is very bad. So if head was flowed........with decent cams........and Weber 45s were fitted......would you suggest that the power at the flywheel (engine) would be somewhere in the region of 180bhp??

What cams did you use in your engine and what sort of lift were they producing??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote"> but the biggest downside of these motors is the weak valvetrain and shitty stock rod bearings...but if you can take care of that, their great motors</TD></TR></TABLE>
ok the valve train is weak but can be upgraded but why the hell are the stock rod bearings weak?!?!? you are a tool!!!!!OEM honda bearings are 100% reliable for any series motor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pug206 &raquo;</TD></TR><TR><TD CLASS="quote">
I've read a few times that the flowrate of the standard ZC head is very bad. </TD></TR></TABLE>

Based on comments I remember reading by Larry @ Endyn the ZC head requires very little work.

 

wow, what a post to come back to, talk about gettin your *** chewed out.... Ok, I guess no one has ever come close to the motor that me and my friends put together. It can be done, Ill try and find the dyno sheet tonight. It was an N/A ZC and by no means was it even anywhere close to stock. We took the block to my work and bored it .040 over, called out to my buddy in So Cal and custom made us some forged domed pistons, which put us at 13.5:1 cr. Then I milled the head and block down .020 each. We ran ITBs on it, DC 4-2-1 header, ran Probe I-beam lightweight rods, 8.5 lbs flywheel. Ported and polished the head a **** LOAD before it looked good on the flowbench. JG Dual valve springs and sent em the cams for a big regrind. Portmatched everything up. Then we decided to send out the pistons to Calico to go thru the CT3. Ran a 2 layer head gasket. Thats the basics of it, but a lot more work than that went into the motor. But we ran it on the dyno and tuned it with hondata. We ran it on 104 octane and it was a pretty cool dry day, we got up over 300 i know, i forget the exact number, but ill post it when i find it... I told the guy we did the car for before hand it would have been much much MUCH cheaper and easier to go turbo, but he was detirmened to go N/A, so we did what he wanted, cost a pretty penny tho

 

so i was a few horsepower off but still thats pretty close

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">wow, what a post to come back to, talk about gettin your *** chewed out.... Ok, I guess no one has ever come close to the motor that me and my friends put together. It can be done, Ill try and find the dyno sheet tonight. It was an N/A ZC and by no means was it even anywhere close to stock. We took the block to my work and bored it .040 over, called out to my buddy in So Cal and custom made us some forged domed pistons, which put us at 13.5:1 cr. Then I milled the head and block down .020 each. We ran ITBs on it, DC 4-2-1 header, ran Probe I-beam lightweight rods, 8.5 lbs flywheel. Ported and polished the head a **** LOAD before it looked good on the flowbench. JG Dual valve springs and sent em the cams for a big regrind. Portmatched everything up. Then we decided to send out the pistons to Calico to go thru the CT3. Ran a 2 layer head gasket. Thats the basics of it, but a lot more work than that went into the motor. But we ran it on the dyno and tuned it with hondata. We ran it on 104 octane and it was a pretty cool dry day, we got up over 300 i know, i forget the exact number, but ill post it when i find it... I told the guy we did the car for before hand it would have been much much MUCH cheaper and easier to go turbo, but he was detirmened to go N/A, so we did what he wanted, cost a pretty penny tho</TD></TR></TABLE>
doesn't seem possible when most b series with serious builds are struggling to make 300whp.

 

There's no way in hell a ZC made 300whp and 291tq N/A.
You won't make up 200WHP N/A. I'm sorry.
Post pics of the actual motor, not a graph.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">wow, what a post to come back to, talk about gettin your *** chewed out.... Ok, I guess no one has ever come close to the motor that me and my friends put together. It can be done, Ill try and find the dyno sheet tonight. It was an N/A ZC and by no means was it even anywhere close to stock. We took the block to my work and bored it .040 over, called out to my buddy in So Cal and custom made us some forged domed pistons, which put us at 13.5:1 cr. Then I milled the head and block down .020 each. We ran ITBs on it, <U>DC 4-2-1 header</U>, ran Probe I-beam lightweight rods, 8.5 lbs flywheel. Ported and polished the head a **** LOAD before it looked good on the flowbench. JG Dual valve springs and sent em the cams for a big regrind. Portmatched everything up. Then we decided to send out the pistons to Calico to go thru the CT3. Ran a 2 layer head gasket. Thats the basics of it, but a lot more work than that went into the motor. But we ran it on the dyno and tuned it with hondata. We ran it on 104 octane and it was a pretty cool dry day, we got up over 300 i know, i forget the exact number, but ill post it when i find it... I told the guy we did the car for before hand it would have been much much MUCH cheaper and easier to go turbo, but he was detirmened to go N/A, so we did what he wanted, cost a pretty penny tho</TD></TR></TABLE>
now I know your smoking crack and talking out of your ***

 

wheres this car at now?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nappyroots827 &raquo;</TD></TR><TR><TD CLASS="quote">

so i was a few horsepower off but still thats pretty close</TD></TR></TABLE>

that doesnt look anything like a 4cyl NA powerband you dumb expletive.