Porting Heads. Suggestions Welcome
- Thread starter bbptech
- Start date
blowfishRus6
New member
hope you didnt knick any of the valve seats.
if you knick it to much the valve wont seal to the head when closed and cause you issuies.
if you knick it to much the valve wont seal to the head when closed and cause you issuies.
TheOtherNick
The mod from over yonder
If you dont have the valves reseated after you port your heads you are stupid.
Bio248
DUI BABY
this.
almost all of the gains are in the valve job, valve cutting, and bowl work. you can work for ever and not see ANY gains if you don't know what you're doing. the only way to know how you've done is with a flow bench...which you haven't.
polishing the chamber with sanding rolls will reduce knock. otherwise the pics are a little too blurry to see your bowl work.
polishing the chamber with sanding rolls will reduce knock. otherwise the pics are a little too blurry to see your bowl work.
bbptech
New member
ya well sorry i dont have that great of a camera. These arent going to be perfect for my first time, that i know. Im just looking to see how good i can do. if they get screwed up. start on another set.
id like to get them on a flowbench but we dont have one here. i went in there 6 months ago to see if they could port some heads for me and they cut me off and said no because they didnt have a flow bench.
id like to get them on a flowbench but we dont have one here. i went in there 6 months ago to see if they could port some heads for me and they cut me off and said no because they didnt have a flow bench.
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blowfishRus6
New member
yea, i guess. there is no gains in hitting that area tho. if your not going bigger valves your just spending more money at the machine shop then neccecry. just clean off the carbon with solution.
no need to call people stupid.... there is more than one way to port some heads, not everybody hits the seats. if its not broke, dont fix it.....
TheOtherNick
The mod from over yonder
Did you check to see if the valves are seated correctly? Do you have to tools necessary to even check that? I have reseated my own valves before it sucks takes too much time. I would just pay a machine shop to grind the valves and seat them. To you get gains from it no. Does is keep the edge of your valve from hanging over the seat getting too hot a breaking apart yes. I guess its up to you but $100 valve job is cheaper than a $300-500 short block.
blowfishRus6
New member
you dont have to have the necessary tools when you know people 
you have a point tho, have i seen alot of broken valves, no, but for peice of mind, why not.
im just not a beliver of getting to crazy in that area (the bowls mainly) they kinda determine the flow dynamics of the head and i wouldent want to jeperdise those dynamics.
logan was kind of on the right path. alot of people when they talk about head work talk about smoothing and blending of the bowls, not so much porting/hoging things out.
just like the case of a hoged out supercharger, take to much away from the dynamics of the flow and you lessen the output. it was made that way for a reason.
but everybody has there diffrent ideas on it, cant really say **** with out a flow bench....
you have a point tho, have i seen alot of broken valves, no, but for peice of mind, why not.
im just not a beliver of getting to crazy in that area (the bowls mainly) they kinda determine the flow dynamics of the head and i wouldent want to jeperdise those dynamics.
logan was kind of on the right path. alot of people when they talk about head work talk about smoothing and blending of the bowls, not so much porting/hoging things out.
just like the case of a hoged out supercharger, take to much away from the dynamics of the flow and you lessen the output. it was made that way for a reason.
but everybody has there diffrent ideas on it, cant really say **** with out a flow bench....
minichopper6hp
Banned - Busted For Scamming
Get a book on making power. The only reason why they ported heads on the 3800 camaro on the club gp thread is because it was naturally aspirated. The forced induction motor does not suffer from VE losses in the same way.
blueguy
The Blue One
Somewhere along the way you read VERY wrong. So your telling me putting ported/polished heads on a FI car isn't going to make a difference?
Get real.
blowfishRus6
New member
ive seen plenty of turbo lsx guys polish/port there heads and get gains.
its flowing more air in/out of the cylenders. if its not a hack job there is gains to be had n/a or forced induction
its flowing more air in/out of the cylenders. if its not a hack job there is gains to be had n/a or forced induction
minichopper6hp
Banned - Busted For Scamming
Im saying the gains arent worth the trouble.. and if you go too far even slightly you decrease power. Overall, even porting the heads a little will net you worse mpg and off WOT power. Yes it does give you more overall flow but sometimes that isnt the best thing. Like i said before, smoothing the inlet and polishing the exhaust runners/ combustion chamber is the farthest i would go.
minichopper6hp
Banned - Busted For Scamming
Show me where 30 whp has been gained by just porting the heads.
