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Author Topic:   vortech heads
NORACIN
Dirt Newbie

Total posts: 3
posted December 04, 2005 09:08 PM  
will the vortech head work on a .100 dome speed pro piston.

Eljojo
Dirt Forum Champ
Total posts: 991
posted December 05, 2005 04:12 AM  
Nope

dirttrackin94
Dirt Maniac

Total posts: 110
posted December 07, 2005 12:27 PM  
why will the vortec not work on this application?even with a 5.7 rod??

leapinlizard
Dirt Freak

Total posts: 425
posted December 07, 2005 12:30 PM  
Rod lenght isn't the issue. The dome hitting the head is.

MetricMonte
Dirt Maniac

Total posts: 118
posted December 07, 2005 01:00 PM  
I would think it would depend on how the dome is made.

MetricMonte
Dirt Maniac

Total posts: 118
posted December 07, 2005 01:04 PM  
I know this isnt SpeedPro but if you can get a SpeedPro made like this it should work.
http://www.kb-silvolite.com/feature.php?action=read&F_id=16

dirttrackin94
Dirt Maniac

Total posts: 110
posted December 07, 2005 03:01 PM  
how are the vortecs different from any other head?i thought 23* heads were all the same.the speed pro .100 dome pistons i have look like the kb's in the picture,someone please give me some insite as i never new the vortecs called for a special piston.thanks

MetricMonte
Dirt Maniac

Total posts: 118
posted December 07, 2005 04:17 PM  
I think it all comes down to where the plug is in the chamber design on the vortecs. If it was a dome without that little cut out (which alot dont have the cut out) the plug or where the plug sets in the chamber would hit the dome.

Mark Wakefeld
Dirt Roller

Total posts: 19
posted December 07, 2005 05:38 PM  
vortecs have a completely different combustion chamber, thats where a lot of their power is made due to its efficiency.


leapinlizard
Dirt Freak

Total posts: 425
posted December 08, 2005 07:56 AM  
They use a fast burn heart or kidney shaped chamber rather than a wedge shape.

dirttrackin94
Dirt Maniac

Total posts: 110
posted December 08, 2005 09:13 AM  
i see..thanks

engineman
Dirt Full Roller

Total posts: 59
posted December 08, 2005 06:58 PM  
speed pros will work just fine if you modify the dome , or the head, or both just a little. I run the H617 (.275 dome) Speed pro with vortec heads all the time. you have to notch the dome for the plug and grind the corners off the square pad in the head under the spark plug, but it works just fine.

Now I know some of you are biting your tongue (or typing fingers) to tell me that these domes are inefficient in vortec heads, but the fact of the matter is ALL domes are inefficient in ALL heads, so if you need the compression for say...an alcohol engine, and want to do it cheap for say...a claimer engine, the good ole durable Speed-pro dome is great for this application!
I also had a guy on here tell me that grinding the square pad off vortec heads killed the swirl, so I tested his theory and found that this is simply NOT TRUE. Swirl did not change....in fact it got a little better.

Now with that being said, I personally think if you want the compression without all the hassles,weight and inefficiency of the domes....just angle mill them and run a flat top. you will make a lot more power this way,it just cost a little more. JMHO

------------------
Mark's Racing Engines
(903)883-0196
www.northtexasracing.com
engineman@northtexasracing.com

[This message has been edited by engineman (edited December 08, 2005).]

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