are p29 pistons gonna work in a d16y8? i know they will fit the only thing im worried about is valve clearance. does anyone have this setup please post oppinions

 

It will work fine.

 

work? Like, will it fit and clear the valves??- yes

Not too streetable tho. I had p29's in my D16Z6 with .020 off the head and it was some pretty high compression. I'd recommend some PM6's, especially with the smaller cc of the Y8 head

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Evs-One &raquo;</TD></TR><TR><TD CLASS="quote">work? Like, will it fit and clear the valves??- yes

Not too streetable tho. I had p29's in my D16Z6 with .020 off the head and it was some pretty high compression. I'd recommend some PM6's, especially with the smaller cc of the Y8 head</TD></TR></TABLE>

Plenty streetable. http://www.d-series.org, and ask Agentjam or builthatch how streetable their cars are.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlacoy82 &raquo;</TD></TR><TR><TD CLASS="quote">

Plenty streetable. http://www.d-series.org, and ask Agentjam or builthatch how streetable their cars are. </TD></TR></TABLE>

Why? I ran the setup. Yeah it's streetable, but not as easy as throw new pistons in. You need a bigger cam and fuel management and tuning for it to be right

 

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

Why? I ran the setup. Yeah it's streetable, but not as easy as throw new pistons in. You need a bigger cam and fuel management and tuning for it to be right</TD></TR></TABLE>

Well, exactly.

 

what kind of cam do you suggest? and what fuel managment?

 

if you wanted to lower compression a little you could always get a thicker head gasket too.

 

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

Why? I ran the setup. Yeah it's streetable, but not as easy as throw new pistons in. You need a bigger cam and fuel management and tuning for it to be right</TD></TR></TABLE>

Interesting....

p29 pistons in d16y8

11.5:1 C/R
Stock P28, or P2P in winter

Daily driven, reliably

What would make it un-streetable now?

 

Where in the hell are you guys getting such low CR values for P29 slugs in a D16Y8 engine?

Check this link for the values to put in:

http://www.muller.net/sonny/cr...t.gif

Now put the values into this calculator:

http://www.c-speedracing.com/h...c.php

Depending on what piston-to-deck clearance value you input, you get no LESS than 12.5:1 CR - put in the value for the D16Y8 engine and you get 13:1CR.

Again how do you get only 11.5:1? I have 11:1CR with my P29 slugs in a D16A6, which has much larger combustion chambers.

With my stock head and cam, and stock PM6 ECU it did try to detonate in the hot summers, so I pulled some timing and it went away. Again I'm only running 11:1CR.

I'd not recommend P29 slugs in a D16Y8 to everyone - it'll take really good management and tuning IMO to make it work.

Not to mention the valve reliefs don't match up and require some claying to determine what cam is safe to run...

 

its all in the headgasket
And .045 piston to deck (mic'd)


and this calculator works much better
http://www.knology.net/~jediklc/dcalc.htm

 

Why would you want a thicker head gasket when you can have a lower domed piston?

I'd rather have flatter topped pistons and the stock metal head gasket. Don't the higher domes impede flow a bit more than flatter topped pistons?

I thought it was a general rule that you'd rather gain CR with combustion chamber shape/size versus piston domes.

 

Thick headgasket is only till I get ready to tune, once ready to tune, everything goes in, as will a much thinner headgasket

Impede flow, possible, but probably not to an extend that I will ever notice

 

A lot of people, myself included, like to stay on the cautious side of things.

Having said that I'm not one for pulling a head off and swapping head gaskets for tuning purposes, and honestly I don't think the extra CR is worth nearly as much as a good flowing head and cam.

Unless someone already has a maxed out cylinder head, cam, etc. I'd focus more on those and less on the max CR on cast OE pistons.

I'd stay at 11:1ish CR and get a nice cam and a good headjob, but then again I'm a cautious baby.

BTW:

Even if I decide to build a crazy B series N?A monster I'm still not going over 11.5:1CR - I've seen far too many tuned 12.5:1CR engines still not making much more, if any, whp than engines built the same with less CR.

Different strokes for different folks I guess...

 

i was figuring on having a 12 to 1 cc. but if it is more im not going to complain. i really need to know what a good cam would be though im wanting to purchase that now to so it all gets broke around the same time. does anyone have any suggestions? i heard jun made one but i havnt been able to find it.

 

Crower stage 3.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jlacoy82 &raquo;</TD></TR><TR><TD CLASS="quote">Crower stage 3. </TD></TR></TABLE>
i second that. look on d-series.org and acouple guys have that cam.

 

I still say PM6 pistons with headwork AND most importantly...GEARING

 

tuning is the most important thing you will have to do.

 

im really wanting to make this a daily driver what about a zex cam they are in my budget, im also thinking im gonna need a lil bit more fuel im thinking bigger injectors like 330's what do you guys think

 

i just ran the numbers at http://www.knology.net/~jediklc/D.htm and got 13.128963812527295 C/R for the Y8 with P29 pistons.

 

crunk bump !

 

late night bump

 

please note with a 13:1 cr, you will probably not be able to run on pump gas, except I think Racetrack still carries 100 octane. Just thought Id mention that about high comp motors. Don't forget about your octane and your spark plug heat range.

 

pg6bs(30mm ch,1.5cc dome) are a good choice also,no clereance issues with the crower stage 2