Cylinder head dimpling NASCAR BANNED - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 07-12-2013, 11:45 AM   #1
Registered Member
 
Join Date: Jul 2013
Posts: 5
Country: United States
Cylinder head dimpling NASCAR BANNED

Hi All,

I dont know if anyone has ever heard of this but there's a "FREE" way to increase combustion efficiency onsteel headed engines with something called "dimpling"

NASCAR actually banned this in the 80's because as usual if they cant control it (AKA Bloomberg and My Big Gulp) they wont allow it.

What it simply is, is a series of high points (usually done with a very small chisel) to create "HOT SPOTS" within the combustion chamber. The further the dimples are from the spark plug the better. What happens is that during flame propagation the high spots create additional hot spots to aid in combustion efficiency. What this basically means is that you make much more power throughout the entire RPM band with the same amount of fuel. So what that means is that you dont need as much throttle to get you down the road.

As far as aluminum heads go it doesnt work. The high spots burn away and it actually works against you.

Post back for more info......

Cheers.
__________________

dynovalvefrank is offline   Reply With Quote
Old 07-13-2013, 06:33 AM   #2
Registered Member
 
Join Date: Jul 2013
Posts: 5
Country: United States
Dimpling Mistake

Sorry I mis-spoke about aluminum before, It does work on aluminum but not long term. NASCAR Race engines usually dont see more than one race, so by the time the aluminum high spots fully burned away the engine was already one destined for the scrapper.

Also pre-ignition is a major issue, this method requires a precise pattern of dimples that follows the "combustion swirl" It was easy to figure out on my old steel headed LT1 engine and there was no noticeable detonation. It also allowed me to "retard" my timing a few degree's with LT1 Edit Software.
__________________

dynovalvefrank is offline   Reply With Quote
Old 07-22-2013, 08:38 AM   #3
Registered Member
 
tradosaurus's Avatar
 
Join Date: Jan 2011
Posts: 258
Country: United States
Quote:
Originally Posted by dynovalvefrank View Post
Sorry I mis-spoke about aluminum before, It does work on aluminum but not long term. NASCAR Race engines usually dont see more than one race, so by the time the aluminum high spots fully burned away the engine was already one destined for the scrapper.

Also pre-ignition is a major issue, this method requires a precise pattern of dimples that follows the "combustion swirl" It was easy to figure out on my old steel headed LT1 engine and there was no noticeable detonation. It also allowed me to "retard" my timing a few degree's with LT1 Edit Software.
Crap!

Too late. Now I've got dimples I didn't need. LOL
tradosaurus is offline   Reply With Quote
Old 07-03-2014, 08:37 PM   #4
Registered Member
 
Join Date: Jul 2014
Posts: 7
Country: United States
Location: forest park. IL
all that LT1 junk is a big inconsistent hot spot to begin with due to those 2 poorly placed exhaust ports offset in the center. this is why they fixed the bad head design on the LS motors.

there is no performance to be had by creating hot spots in the chamber. hot spots cause detonation and require less timing, richer mixture, and lower compression ratios to eliminate. all of which rob power. if you really believe anything you just wrote you need to take a better look at physics and reality. why on earth anybody would create a problem and then compensate for it by reducing performance by pulling timing is beyond me. if you want to fill a forum with your bad information, i suggest you find a different one.
rob342 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel Additives... Strongbad General Fuel Topics 7 08-09-2011 02:05 PM
WANTED 1987-1992 Honda CRX HF, Texas TheTheft Wanted to Buy 3 07-11-2008 10:44 PM
Family Carpooling BumblingB General Discussion (Off-Topic) 2 06-07-2008 01:37 PM
Socal Yaris driver In N Out Introduce Yourself - New member Welcome 6 04-11-2008 06:22 PM
GM to produce a plug in?! budomove General Discussion (Off-Topic) 8 01-10-2007 05:40 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 03:40 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.