Compression, Cylinder Size Discussion - PowerStrokeNation : Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 89 (permalink) Old 04-10-2010, 03:16 AM Thread Starter
The Unseen Mod
 
RescueF250's Avatar
 
Join Date: Jul 2007
Location: NOVA, Virginia
Posts: 4,126
Send a message via AIM to RescueF250
Post Compression, Cylinder Size Discussion

Well I know we all see the same post how about starting a good discussion.

Lowering Compression on a 6.0 opinions and thoughts How much to lower,

How about working the bowl sizing ? .020, .030, .040 over good and bads for each, Whats good for daily driving vs racing.

03 Rescue is Dead

08 Rescue - No Limit Fab, MPD, Rescue Diesel, Barder Turbo, Fuel Lab, H&S products.
RescueF250 is offline  
Sponsored Links
Advertisement
 
post #2 of 89 (permalink) Old 04-10-2010, 12:35 PM
<<< just like that......
 
SootRoller's Avatar
 
Join Date: Dec 2008
Location: Lafayette, LA
Posts: 810
Re: Compression, Cylinder Size Discussion

/ derail, where in the heck have you been?

~I shoot the early bird, that's how I get the worm~Weezy
SootRoller is offline  
post #3 of 89 (permalink) Old 04-10-2010, 01:21 PM Thread Starter
The Unseen Mod
 
RescueF250's Avatar
 
Join Date: Jul 2007
Location: NOVA, Virginia
Posts: 4,126
Send a message via AIM to RescueF250
Re: Compression, Cylinder Size Discussion

I've been here I only reply to question that require experience or indepth stuff. So I decided to start a discussion for the veterans to pick our brains.

03 Rescue is Dead

08 Rescue - No Limit Fab, MPD, Rescue Diesel, Barder Turbo, Fuel Lab, H&S products.
RescueF250 is offline  
 
post #4 of 89 (permalink) Old 04-10-2010, 07:09 PM
PSN Local
 
HiVoltage's Avatar
 
Join Date: Aug 2007
Posts: 166
Re: Compression, Cylinder Size Discussion

Subscribed!

2004 F250 King Ranch 6.0L
Swamps 190's,compounds,stage 2 fuel system,Spearco,ported heads,Suncoast, Bored out .020, some top secret things that I can neither confirm nor deny.
Live tuned by Jonathan & Cassie from BDP
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
HiVoltage is offline  
post #5 of 89 (permalink) Old 04-10-2010, 07:21 PM
Captain Negativity!
 
PSDPlayer's Avatar
 
Join Date: Jul 2007
Location: Ft Lauderdale, FL
Posts: 3,109
Send a message via AIM to PSDPlayer
Re: Compression, Cylinder Size Discussion

Ok fine. I'll take the first position. .010, .020, 0.30, 0.40 isn't going to have much variance in them. Now if you said .120 over, then you would be talking about cramming a 6.4L sized piston in there. Step up into the over 4" crowd and now you are getting somewhere. We have the equivalent of a small block ford.

Dropping compression. There are some SAE white papers about them in relation to power output along with emissions. One of them went into detail about going from 13.5 to 20:1 and after a certain point going up there were no more increases in power, but only emissions. But there is a whole extra side to this. Rod ratio. This will determine the speed of the piston going up and then coming back down. Change rod ratio and leave the piston dwelling at TDC too long and you will melt that thing.

Port the heads. Equal out the air distribution. Take away the crazy drive pressure. Then you will see this thing wake up. And of course, biggest bore physically possible.

Email:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Phone:954-275-6801 Leave me a message. I can't always answer.
05 CC LB DRW Lariat 4x2 Dropped 3/6.
PSDPlayer is offline  
post #6 of 89 (permalink) Old 04-10-2010, 07:55 PM Thread Starter
The Unseen Mod
 
RescueF250's Avatar
 
Join Date: Jul 2007
Location: NOVA, Virginia
Posts: 4,126
Send a message via AIM to RescueF250
Re: Compression, Cylinder Size Discussion

Was waiting for you to chime in lmao. So bore to .120 over how does that affect the block ? Strength wise ? Wouldn't it weaken the block itsself ? Throwing 6.4 pistons heck why not Duramax piston , different style or work done to them.

Dropping compression isn't always that good either right, what gains can be made, what other troubles come with lowering compression. Drive pressures now what does this affect turbo ? Having pressure to spin

03 Rescue is Dead

08 Rescue - No Limit Fab, MPD, Rescue Diesel, Barder Turbo, Fuel Lab, H&S products.
RescueF250 is offline  
post #7 of 89 (permalink) Old 04-10-2010, 08:06 PM
Captain Negativity!
 
PSDPlayer's Avatar
 
Join Date: Jul 2007
Location: Ft Lauderdale, FL
Posts: 3,109
Send a message via AIM to PSDPlayer
Re: Compression, Cylinder Size Discussion

Quote:
Originally Posted by RescueF250 View Post
Was waiting for you to chime in lmao. So bore to .120 over how does that affect the block ? Strength wise ? Wouldn't it weaken the block itsself ? Throwing 6.4 pistons heck why not Duramax piston , different style or work done to them.

Dropping compression isn't always that good either right, what gains can be made, what other troubles come with lowering compression. Drive pressures now what does this affect turbo ? Having pressure to spin
Where ever did you get that idea from? And the block wouldn't be any weaker. It's what international did to make the 6.4L.

Email:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Phone:954-275-6801 Leave me a message. I can't always answer.
05 CC LB DRW Lariat 4x2 Dropped 3/6.
PSDPlayer is offline  
post #8 of 89 (permalink) Old 04-10-2010, 09:11 PM
PSN Veteran
 
lubeowner's Avatar
 
Join Date: Jul 2007
Location: Platteville, WI 53818
Posts: 1,606
Re: Compression, Cylinder Size Discussion

Do some research about the correlation to valve to cylinder wall clearance and air flow. May engine builder that I have talked to will tell you that if air flow is your key you should get the bore as big as possible and even shorten the stroke if you have to.

The 5.9 Cummins has a bore of 4.02"
The 6.6 Duramax has a bore of 4.06"
The 7.3 Powerstroke bore is 4.11"
The 6.4 Powerstroke bore is 3.86"
the 6.0 Powerstroke bore is 3.74"

Jeremy Johnson
Search "lubeowner" on youtube for many truck pulling videos.
dieseldr.net
We build Powerstroke pulling trucks.
lubeowner is offline  
post #9 of 89 (permalink) Old 04-10-2010, 09:27 PM
Captain Negativity!
 
PSDPlayer's Avatar
 
Join Date: Jul 2007
Location: Ft Lauderdale, FL
Posts: 3,109
Send a message via AIM to PSDPlayer
Re: Compression, Cylinder Size Discussion

Quote:
Originally Posted by lubeowner View Post
Do some research about the correlation to valve to cylinder wall clearance and air flow. May engine builder that I have talked to will tell you that if air flow is your key you should get the bore as big as possible and even shorten the stroke if you have to.

The 5.9 Cummins has a bore of 4.02"
The 6.6 Duramax has a bore of 4.06"
The 7.3 Powerstroke bore is 4.11"
The 6.4 Powerstroke bore is 3.86"
the 6.0 Powerstroke bore is 3.74"
And which one of them had the pin closest to the rings again?

Email:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Phone:954-275-6801 Leave me a message. I can't always answer.
05 CC LB DRW Lariat 4x2 Dropped 3/6.
PSDPlayer is offline  
post #10 of 89 (permalink) Old 04-10-2010, 09:34 PM Thread Starter
The Unseen Mod
 
RescueF250's Avatar
 
Join Date: Jul 2007
Location: NOVA, Virginia
Posts: 4,126
Send a message via AIM to RescueF250
Re: Compression, Cylinder Size Discussion

Nice now its getting interseting

03 Rescue is Dead

08 Rescue - No Limit Fab, MPD, Rescue Diesel, Barder Turbo, Fuel Lab, H&S products.
RescueF250 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the PowerStrokeNation : Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome