Search
Search titles only
By:
Search titles only
By:
Forums
New posts
Search forums
Members
Registered members
Member Map
Current visitors
New profile posts
Search profile posts
What's new
New posts
All posts
Trending
Latest activity
New media
New Events
New review items
New Users & BDays
New User Announcements
Birthday Announcements
New classified ads
New showcase items
New classified comments
New showcase comments
Classifieds
New ads
New comments
Latest content
Latest feedback
Latest questions
Advertiser list
Search classifieds
Media
New media
New comments
Search media
Events
New events
Donate
My CCF
Toolbox
Mailing Lists
My Shop
Reviews
New items
Latest content
Latest reviews
Latest questions
Brands
Search reviews
Showcase
New items
New comments
Latest content
Latest updates
Latest reviews
Author list
Series list
Search showcase
Log in
Register
Search
Search titles only
By:
Search titles only
By:
New posts
Search forums
Members
Registered members
Member Map
Current visitors
New profile posts
Search profile posts
Menu
Install the app
Install
Reply to thread
Corvette
Corvette Performance
Forged 427 vs Forged 416
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="Manny@Dasilva" data-source="post: 16737" data-attributes="member: 78"><p>Answer your question:</p><p></p><p> A "shorter" stroke will let you have a longer rod in the same block. By reducing the stroke, enlarging the bore and making the rods longer you benifit from a number of things. A larger bore means larger valves, less shrouding of the valves and more air flow and air flow is what is going to make hp and torque. Now there are limitations to the maximum length of the rod for any application. As the rod gets longer it has to move up into the piston further, which moves the pin further up into the ring pack. More air flow , lower compression = monster blower application</p><p> </p><p> By lengthening the rods you have change the geometry of the rod angles in relation to the crank during the rotation of the crank. The longer rod is going to mean that the piston hangs around TDC longer making the combustion more effecient. This will mean more force on the rod/crank and more torque. Also since the combustion is more efficient it reduces detonation, which means you can run a higher compression ratio, which adds yet more hp/torque. </p><p></p><p>The one exception that I've read to all of this is a turbo/blower motor where it might be better to "not" have the piston dwell at TDC. Also blower motors make power way further down the piston stroke than a non-blown motor will as there is a lot more air/fuel burning and providing power.</p></blockquote><p></p>
[QUOTE="Manny@Dasilva, post: 16737, member: 78"] Answer your question: A "shorter" stroke will let you have a longer rod in the same block. By reducing the stroke, enlarging the bore and making the rods longer you benifit from a number of things. A larger bore means larger valves, less shrouding of the valves and more air flow and air flow is what is going to make hp and torque. Now there are limitations to the maximum length of the rod for any application. As the rod gets longer it has to move up into the piston further, which moves the pin further up into the ring pack. More air flow , lower compression = monster blower application By lengthening the rods you have change the geometry of the rod angles in relation to the crank during the rotation of the crank. The longer rod is going to mean that the piston hangs around TDC longer making the combustion more effecient. This will mean more force on the rod/crank and more torque. Also since the combustion is more efficient it reduces detonation, which means you can run a higher compression ratio, which adds yet more hp/torque. The one exception that I've read to all of this is a turbo/blower motor where it might be better to "not" have the piston dwell at TDC. Also blower motors make power way further down the piston stroke than a non-blown motor will as there is a lot more air/fuel burning and providing power. [/QUOTE]
Insert quotes…
Verification
Post reply
Corvette
Corvette Performance
Forged 427 vs Forged 416
Top
Bottom
You're browsing as a
Guest
. Please register to receive all manner of go-faster benefits on CCF. Click
HERE
to login or register.