Pg6 pistons in a d16z6 - D-series.org

justin7524 · 07-05-2009, 11:11 AM

i have a d16z6 and ive searched and i can't find a straight answer.
Will i have piston to valve clearance issues? i'm going to run a crower stage 2 cam btw.

i'm looking to build a 11:1 ish cr as a daily driver.

i'm sure someone has done this before. advise?

Hugo Boost · 07-05-2009, 11:14 AM

clay ??

justin7524 · 07-05-2009, 11:27 AM

i know claying the motor is the best way to find out. but i don't want to find out later that i need to enlarge the valve reliefs. i would rather go with a d16a6 piston then.

naterpatater77 · 07-05-2009, 02:45 PM

i have pm6's in my car with a .020 overbore and the block decked to zero the pistons itll yield 11 ish to 1 cr

i dont see y pg6's wouldnt work espically since guys have been doing p29's for years with no issues

alt · 07-05-2009, 03:05 PM

Quote:

Originally Posted by naterpatater77

i have pm6's in my car with a .020 overbore and the block decked to zero the pistons itll yield 11 ish to 1 cr

i dont see y pg6's wouldnt work espically since guys have been doing p29's for years with no issues

The answer that I've come up with from several places is that the PG6 pistons have their reliefs sized differently from the P29 pistons and the general consensus is that they need to be widened to make it work with the valve placement on the SOHC vtec head.

justin7524 · 07-05-2009, 09:28 PM

so i'm thinking of going pm6's since people have confirmed that there will be no issues. i'm going to mill the head 0.02" and a 2 layer d16y8 Head gasket. that according to the comp calculator gives me about 10.75:1cr. And if i find a d16y8 head then it will give me 11.2:1cr.

nater- are you running a stock cam?

danz · 07-06-2009, 12:06 AM

buy the PG6's and try it. if it doesnt work share the info

AMkrew_1 · 07-06-2009, 11:44 AM

I have 1mm oversize pg6b's in a z6 with .024" mill. I found that even without the gasket, I had .075" at overlap/tdc for one side(I or E, don't remember) and the other had about .100". This was done with the crower2na.

I did polish the tops of the piston, but minimal material was removed.

Your results may vary.

boost ben · 07-06-2009, 12:25 PM

http://d-series.org/forums/engine-bu...7-build-3.html

justin7524 · 07-06-2009, 08:31 PM

boost ben. seeing the claying pictures. do you think a stage 2 cam and vtec would survive ?

cervan · 07-06-2009, 09:00 PM

Quote:

Originally Posted by justin7524

boost ben. seeing the claying pictures. do you think a stage 2 cam and vtec would survive ?

uh... "

I have 1mm oversize pg6b's in a z6 with .024" mill. I found that even without the gasket, I had .075" at overlap/tdc for one side(I or E, don't remember) and the other had about .100". This was done with the crower2na.

I did polish the tops of the piston, but minimal material was removed.

Your results may vary."

boost ben · 07-07-2009, 05:14 AM

Quote:

Originally Posted by justin7524

boost ben. seeing the claying pictures. do you think a stage 2 cam and vtec would survive ?

It depends on what the max lift is in Vtec. The spec for the Delta 272 are,

Intake- .394" lift, 216* duration
Exhaust- .370" lift, 210* duration

I still had some room to play but not to much.

alt · 07-07-2009, 09:52 AM

If its the stage 2 crower cam my cam card pics are up on one of my threads in my sig.

boost ben · 07-09-2009, 02:16 PM

your cam has a much larger duration and slightly bigger lift. I'm going to take an educated guess and say...... maybe?

EDIT...

I read further down your cam card and saw that your measurements at .050" are only

intake 235* 270"
exhaust 223* 242"

So you actually have a much smaller lift and a slightly larger duration; you may still hit.

justin7524 · 07-16-2009, 08:01 PM

wow....maybe i should just be safe and rum pm6 with 0.02 head mill. 10.75cr is enough for a daily driver. thanks for the info!

boost ben · 07-17-2009, 05:03 AM

Give it a shoot, you maybe ok.

07-05-2009, 11:11 AM	#1 (permalink)
justin7524 n00b iTrader: (0) Join Date: Jul 2007 Posts: 6 Rep Power: 0	Pg6 pistons in a d16z6 i have a d16z6 and ive searched and i can't find a straight answer. Will i have piston to valve clearance issues? i'm going to run a crower stage 2 cam btw. i'm looking to build a 11:1 ish cr as a daily driver. i'm sure someone has done this before. advise?

07-05-2009, 11:14 AM	#2 (permalink)
Hugo Boost formerly Kit88 iTrader: (67) Join Date: Oct 2004 Location: McAllen,Tx. /Reynosa, MX Posts: 5,720 Rep Power: 19 View My Photo Gallery	clay ?? __________________ 11.07 at 118 mph Thanks to my sponsors: FJ Distributors, Special Project Motorsports (Kiwi) ,Performance Porting,Transzex, Alexracing, RSM motorsports, Go-Autoworks, D-series.org, SpeedFactory, Bisimoto

07-06-2009, 12:06 AM	#7 (permalink)
danz 6262 > Holset iTrader: (6) Join Date: Oct 2007 Location: Mission Raceway Posts: 7,831 Rep Power: 20	buy the PG6's and try it. if it doesnt work share the info __________________ my EJ6 build thread here! 2010 - 11.536@117.75mph - Z6 2009 - 10.912@127.33mph - A6 Special thanks to ColtCams.com and Go-Autoworks.com!

07-06-2009, 11:44 AM	#8 (permalink)
AMkrew_1 D-series soldier iTrader: (10) Join Date: Jan 2004 Location: Ridgecrest, CA Posts: 601 Rep Power: 7 View My Photo Gallery	I have 1mm oversize pg6b's in a z6 with .024" mill. I found that even without the gasket, I had .075" at overlap/tdc for one side(I or E, don't remember) and the other had about .100". This was done with the crower2na. I did polish the tops of the piston, but minimal material was removed. Your results may vary. __________________

07-07-2009, 09:52 AM	#13 (permalink)
alt D-series lover iTrader: (0) Join Date: Jul 2008 Location: Carroll County MD Posts: 187 Rep Power: 3	If its the stage 2 crower cam my cam card pics are up on one of my threads in my sig. __________________ '00 Camaro SS Convertible - 440rwhp/525rwtq 89CRX Under Construction Motor Build

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07-05-2009, 11:27 AM	#3 (permalink)
justin7524 n00b iTrader: (0) Join Date: Jul 2007 Posts: 6 Rep Power: 0	i know claying the motor is the best way to find out. but i don't want to find out later that i need to enlarge the valve reliefs. i would rather go with a d16a6 piston then.

07-05-2009, 02:45 PM	#4 (permalink)
naterpatater77 D-series lover iTrader: (3) Join Date: Oct 2005 Location: Wisconsin Posts: 244 Rep Power: 5	i have pm6's in my car with a .020 overbore and the block decked to zero the pistons itll yield 11 ish to 1 cr i dont see y pg6's wouldnt work espically since guys have been doing p29's for years with no issues

07-05-2009, 09:28 PM	#6 (permalink)
justin7524 n00b iTrader: (0) Join Date: Jul 2007 Posts: 6 Rep Power: 0	so i'm thinking of going pm6's since people have confirmed that there will be no issues. i'm going to mill the head 0.02" and a 2 layer d16y8 Head gasket. that according to the comp calculator gives me about 10.75:1cr. And if i find a d16y8 head then it will give me 11.2:1cr. nater- are you running a stock cam?

07-06-2009, 12:25 PM	#9 (permalink)
boost ben D-series soldier iTrader: (4) Join Date: Dec 2008 Location: Ottawa, Canada Posts: 850 Rep Power: 3 View My Photo Gallery	http://d-series.org/forums/engine-bu...7-build-3.html

07-06-2009, 08:31 PM	#10 (permalink)
justin7524 n00b iTrader: (0) Join Date: Jul 2007 Posts: 6 Rep Power: 0	boost ben. seeing the claying pictures. do you think a stage 2 cam and vtec would survive ?

07-09-2009, 02:16 PM	#14 (permalink)
boost ben D-series soldier iTrader: (4) Join Date: Dec 2008 Location: Ottawa, Canada Posts: 850 Rep Power: 3 View My Photo Gallery	your cam has a much larger duration and slightly bigger lift. I'm going to take an educated guess and say...... maybe? EDIT... I read further down your cam card and saw that your measurements at .050" are only intake 235* 270" exhaust 223* 242" So you actually have a much smaller lift and a slightly larger duration; you may still hit. Last edited by boost ben; 07-09-2009 at 02:24 PM.

07-16-2009, 08:01 PM	#15 (permalink)
justin7524 n00b iTrader: (0) Join Date: Jul 2007 Posts: 6 Rep Power: 0	wow....maybe i should just be safe and rum pm6 with 0.02 head mill. 10.75cr is enough for a daily driver. thanks for the info!

07-17-2009, 05:03 AM	#16 (permalink)
boost ben D-series soldier iTrader: (4) Join Date: Dec 2008 Location: Ottawa, Canada Posts: 850 Rep Power: 3 View My Photo Gallery	Give it a shoot, you maybe ok.

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