My go at head porting...
03-07-2006, 05:10 PM
#11
1.0 BAR
Join Date: Feb 2003
Posts: 214
Re: My go at head porting...
so wait. Your telling me my doing a port job your turbo spools 1000 rpm sooner
?? Thats pretty impressive.. id idnt think it would do that much. Will it stay like that.. or will it go back up after you get carbon build up? I was thinking it would only give you liike 5 - 10 horsies... i know he said 5 psi. I guess i just underestimated a port and somewhat polish job.
?? Thats pretty impressive.. id idnt think it would do that much. Will it stay like that.. or will it go back up after you get carbon build up? I was thinking it would only give you liike 5 - 10 horsies... i know he said 5 psi. I guess i just underestimated a port and somewhat polish job. 
03-07-2006, 09:27 PM
#12
1.5 BAR
Join Date: May 2004
Location: Westminster,MD
Posts: 1,032
Re: My go at head porting...
Head flow is one of the main things one should look at when building an engine. When you start talking about how many horsepower it gives, you begin to sound ricey. PnP is basically the gateway to make big power..its all about the flow.
03-08-2006, 08:22 AM
#14
1.5 BAR
Thread Starter
Join Date: Sep 2004
Posts: 1,460
Re: My go at head porting...
i didnt just decide to do this one day, i read up and researched what i should do in my application. Certain areas you shouldnt touch with the die grinder are the valve seats, thats about it. Its just about a thousand rpm sooner, Its like 3800 as compared to 4500, but it builds low pressure (5psi or less) ALOT sooner. It makes 2-3 psi now at like 2500. It never used to see boost untill 3500. Im pretty happy with everthing, it cost me zero dollars and i definately didnt lose any power so its ok in my book
03-08-2006, 09:44 AM
#15
3.0 BAR
Join Date: Apr 2005
Posts: 1,521
Re: My go at head porting...
ya i read somewhere if you do it yourself you are just supposed to make intake and exhaust ports bigger, and smooth out any factory flaws from the cast or whatever. i believe him about his power gains/spool time. good job. 
03-08-2006, 09:58 AM
#17
1.5 BAR
Thread Starter
Join Date: Sep 2004
Posts: 1,460
Re: My go at head porting...
thanx major a hole 
With a turbo, your not really supposed to make the exhaust ports any bigger, just as shiny as you can get them to keep exhaust gas velocity high and carbon (from all of our untuned hmt setups) off the port walls. If you go too big on the exhaust ports, the turbo wont spool very well at all because you will loose all your exhaust gas velocity. Most of the gains were probably from smoothening out the valve bowls, thats the only area where the casting isnt so good.
With a turbo, your not really supposed to make the exhaust ports any bigger, just as shiny as you can get them to keep exhaust gas velocity high and carbon (from all of our untuned hmt setups) off the port walls. If you go too big on the exhaust ports, the turbo wont spool very well at all because you will loose all your exhaust gas velocity. Most of the gains were probably from smoothening out the valve bowls, thats the only area where the casting isnt so good.
