I am about to start an all motor D series build up and came across an issue. I currently have a D16Y7 and I'm going to do the mini me with a D16Z6 head and am going to include a cam with the usual valve train upgrades. I hear the the y series have issues with oiling. Mainly low pressure due to a weak oil pump that leads to spun bearings. Would it be possible to swap the Z6 oil pump onto my motor and avoid the spun bearing issue all together. ??
Thanks in advance!

 

ive never herd of that

 

http://www.d-series.org/viewtopic.php?t=7824

Scroll down to the post by Moose..
I dont know if its entirely true either but I'd rather be safe than sorry.

 

Bump!

 

im curious too . but this is the first ive ever herd of this

 

I can vouch for oiling issues...I have spun the #4 bearing on mine, but only after it was worn pretty well.

I don't see the need for shimming, the y7/y8 pumps still provide a good amount of pressure, but the oil passage mod is not a bad idea

Chris

 

D16A6 Oil pump flows 46.4 qt/min@6250rpm
D16Z6 Oil pump flows 47.6 qt/min@6000rpm
D16Y8 Oil pump flows 35.3 qt/min@6800rpm

 

yes some people shim the oil pump for more pressure. I have 2 honda performance books and they talk about shimming the oil pump, but most people just leave it alone, and some do it for extra precaution. There are a lot of civic race cars pushing high hp that don't have theirs shimmed. You should be fine leaving it the way it is but if it bothers you that much stick a shim in there.

 

i haven't had any oil pump issues with my turbo y7 over the past 5 years and 80k miles.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by infinatenexus &raquo;</TD></TR><TR><TD CLASS="quote">D16A6 Oil pump flows 46.4 qt/min@6250rpm
D16Z6 Oil pump flows 47.6 qt/min@6000rpm
D16Y8 Oil pump flows 35.3 qt/min@6800rpm
</TD></TR></TABLE>

Thanks for the info, infinatenexus

That explains ALOT on this issue....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by infinatenexus &raquo;</TD></TR><TR><TD CLASS="quote">D16A6 Oil pump flows 46.4 qt/min@6250rpm
D16Z6 Oil pump flows 47.6 qt/min@6000rpm
D16Y8 Oil pump flows 35.3 qt/min@6800rpm
</TD></TR></TABLE>

That's nice and all, but who's the source? Also, those numbers don't really mean too much since they're at different RPM

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by maztur &raquo;</TD></TR><TR><TD CLASS="quote">Also, those numbers don't really mean too much since they're at different RPM</TD></TR></TABLE>

it sure means something for the y8 pump now doesn't it?

 

So is it possible to swap the Z6 oil pump onto a Y7/Y8??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic-4-ges &raquo;</TD></TR><TR><TD CLASS="quote">

it sure means something for the y8 pump now doesn't it?</TD></TR></TABLE>

Exact-a-mundo!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic-4-ges &raquo;</TD></TR><TR><TD CLASS="quote">

it sure means something for the y8 pump now doesn't it?</TD></TR></TABLE>

Not really because the Y8 was done at 6800rpm and not 6000rpm like the Z6. At redline the flow rate may go down on the pump as the demand for oil gets higher. The Y8 might flow the same at 6000rpm as the Z6.

I have looked at those specs before and realized they are useless since they are not tested at the same rpm. They can be found here.

http://www.geocities.com/motor....html

 

As long as their is a constant supply of oil, there should not be much drop in pressure

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic-4-ges &raquo;</TD></TR><TR><TD CLASS="quote">As long as their is a constant supply of oil, there should not be much drop in pressure</TD></TR></TABLE>

No, that is not true at all. You can't come to that kind of conclusion without seeing a flow chart. Ever seen a fuel pump flow chart? As the pressure and demand get higher, the flow will drop off.

There are more variables other than just the supply of oil. Such as oil pump inlet could be too small on both the Z6 and Y8 to keep up with what the pump could actually flow at high rpm. The pressure increase as rpm increases could cause more backpressure on the pump causing it to flow less is also a possibility.

 

Good points Ryan - in the strictest interpretation of the data shown there is no way of knowing which flows more.

In making assumptions about the data though, why even list a number for flow rate unless it is the max? I don't see why this would be listed if it wasn't the max - it tells you nothing otherwise, as you pointed out.

I know, I know...when you ***-u-me.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">

Not really because the Y8 was done at 6800rpm and not 6000rpm like the Z6. At redline the flow rate may go down on the pump as the demand for oil gets higher. The Y8 might flow the same at 6000rpm as the Z6.

I have looked at those specs before and realized they are useless since they are not tested at the same rpm. They can be found here.
</TD></TR></TABLE>

Yea, but when I said that no one gives me credit

 

http://www.theoldone.com/artic..._tips/

 

there's some REALLY cheap oil pump mods to gain you 10 psi in vtec.....not sure if I want to post yet tho

 

what about putting a z6 pump on the y8 , anybody have comparasons of the 2?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hella_JDM &raquo;</TD></TR><TR><TD CLASS="quote">what about putting a z6 pump on the y8 , anybody have comparasons of the 2?</TD></TR></TABLE>

Werd!

 

also the weight of the oil is also a major factor with oil pressure. Thicker oil meaning oil with a higher viscosity such as 10w40, 15w40, and 20w50 will give you higher oil pressure.

 

higher pressure but less velosity , meaning less flow.