Should i mill my head?

[2StrokeBlaster]

if i mill my head, do i have to p/p? because i do not have enough money for that. my blaster is bored .10 or .20 over i cant really remember right now along with the mods in my signature. if i do get it milled how much should i mill it? another question is what kind of gas should i run with it after it is milled?

 

[Ready2rev]

no you dont need to p/p. if you want to run pump gas you will want .035 milled off no bigger than that unless you want to buy race gas. i run 93 oct on my .025 head with no problems.

 

[gonzo]

ready to rev is spot on

 

[370]

spend teh extra $$ and have the head done correctly a simple milling of the gasket surface only takes away squish clearance.. and if the squish is too tight.. your actually hurting your performance. a blaster combustion chamber isn't exactly an "ideal" design anyway..

 

[blasterboy91]

http://www.blasterforum.com/engine-13/head-milling-what-does-you-2070/

 

[2StrokeBlaster]

spend teh extra $$ and have the head done correctly a simple milling of the gasket surface only takes away squish clearance.. and if the squish is too tight.. your actually hurting your performance. a blaster combustion chamber isn't exactly an "ideal" design anyway..

what do you mean by get it done correctly? its not like ima mill my head myself. ima get done professionally.

explain more on that please?

 

[mopar1rules]

spend teh extra $$ and have the head done correctly a simple milling of the gasket surface only takes away squish clearance.. and if the squish is too tight.. your actually hurting your performance. a blaster combustion chamber isn't exactly an "ideal" design anyway..

simple milling of the gasket surface, doesn't only take away squish clearance....it also raises the compression, trapped compression, and it will also raise the squish velocity, which is something that is important. of course changing the entire head geometry would be the ideal thing, but please don't make it sound like milling the gasket surface is not worth the time/$.

 

[2StrokeBlaster]

ohh alright. thanks alot mopar, because i wasnt sure if he was saying its bad for the proformance or whatt

 

[370]

simple milling of the gasket surface, doesn't only take away squish clearance....it also raises the compression, trapped compression, and it will also raise the squish velocity, which is something that is important. of course changing the entire head geometry would be the ideal thing, but please don't make it sound like milling the gasket surface is not worth the time/$.

for the extra $ involved have it done THE RIGHT WAY. it's not worth the $ to mill it.. the chamber isn't shaped right to begin with.. we can split hairs if you want but the bottom line is milling the gasket surface of a blaster head is not an IDEAL setup by any means. just becuase you read the info that came with youir TSR software doesn't mean your "all knowing".. your taking away from the squish clearance.. mill that f*cker to .030 squish clearance and see how much the "added squish velocity" helps ya.. the chamber is incorrectly shaped.. and all the squish velocity in the world ain't gonna change that..

 

[370]

simple milling of the gasket surface, doesn't only take away squish clearance....it also raises the compression, trapped compression, and it will also raise the squish velocity, which is something that is important. of course changing the entire head geometry would be the ideal thing, but please don't make it sound like milling the gasket surface is not worth the time/$.

and "raising" the compression is good to a point.. but get the compression up too high and watch the over rev suffer. an ill designed head is more prone to detonation and power loss.. most people work aroudn this by more octane and more timing advance.. 2 things that can be pulled back with a CORRECTLY designed combustion chamber

 

[ClimbAnyHill]

For the mods you have yes.. good idea to mill it, these stock heads suck.. Blaster domes are tall and plenty of room to shave down!
Quick cheap mod & won't hurt a thing.. I'd go for a custom rechamber if going with portwork and really beefing up the motor!

 

[370]

For the mods you have yes.. good idea to mill it, these stock heads suck.. Blaster domes are tall and plenty of room to shave down!
Quick cheap mod & won't hurt a thing.. I'd go for a custom rechamber if going with portwork and really beefing up the motor!

you can rechamber the head first.. why bother with milling it when you can spend an extra $40-$45 and have it done correctly.. you get the performance gain, less timing, less heat, and most time can use less octane... youi obviously been misinformed

 

[Kennedy_Power]

Yes the stock OEM clearance is almost .125"
You can cut the gasket surface, but head has several other issues of interest
I spent much time getting the right head design and porting to work correctly on these air cooled engines.
Sure has been fun doing R and D on these engines....

 

[mopar1rules]

for the extra $ involved have it done THE RIGHT WAY. it's not worth the $ to mill it.. the chamber isn't shaped right to begin with.. we can split hairs if you want but the bottom line is milling the gasket surface of a blaster head is not an IDEAL setup by any means. just becuase you read the info that came with youir TSR software doesn't mean your "all knowing".. your taking away from the squish clearance.. mill that f*cker to .030 squish clearance and see how much the "added squish velocity" helps ya.. the chamber is incorrectly shaped.. and all the squish velocity in the world ain't gonna change that..

i never said anything about milling the head enough, to get the squish clearance down to .030". i also never did say that just milling the gasket surface was the IDEAL setup. read my previous posts.

 

[mopar1rules]

and "raising" the compression is good to a point.. but get the compression up too high and watch the over rev suffer. an ill designed head is more prone to detonation and power loss.. most people work aroudn this by more octane and more timing advance.. 2 things that can be pulled back with a CORRECTLY designed combustion chamber

i know that there is a limit to where the high compression ratio starts to hurt you, but the OEM trapped comp ratio is lower than what the service manual says, and is very low to begin with, so simple milling of the gasket surface helps to get the trapped comp ratio where the manual says it is.

 

[mopar1rules]

you can rechamber the head first.. why bother with milling it when you can spend an extra $40-$45 and have it done correctly.. you get the performance gain, less timing, less heat, and most time can use less octane... youi obviously been misinformed

i work in a machine shop (machinist) and would be able to cut the gasket surface in like 15min, so for me and others looking for a quick little bang for the buck, a simple quick face off the head works.

 

[ClimbAnyHill]

you can rechamber the head first.. why bother with milling it when you can spend an extra $40-$45 and have it done correctly.. you get the performance gain, less timing, less heat, and most time can use less octane... youi obviously been misinformed

You act like you've never ran decked heads without rechambered domes & you've never suggested head milling?? Cmon now.
Yeah I agree certain heads need to be redesigned, in this case the Blaster...
This kid is asking about milling the head.. that piped and air filtered Blaster will be fine and gain performance from shaving it.

 

[gonzo]

climb any hill thats a good answer, a tighter squish will make the motor run cooler, and lets be real a blaster engine in general is not a good performance based motor, a balancer shaft? are you kidding me, I never had one in my YZ, I believe Kennedy is working alot to get close to 50 a real lot, which is good a stock YZ 250 over 50 horse so any little bit helps and cutting the mating surface will help a bunch, eliminate some of the width of the squish to maybe 10 mm and you'll be ok

 

[370]

you live and you learn.. i still have a few banshee heads around here that are milled and not rechambered.. as your knowledge and skills progress so does your thinking.. on a banshee your talking a larger difference in prce for a rechaber for a blaster you looking at $40-$45 extra... why even f*ck around for $40-$45 just get it done correctly.. hell these guys are saying mill it .035.. angus says the clearence stock is around .125.. so even after teh milling your clearance will still be .090 which is not even close to correct to begin with..

 

[370]

You act like you've never ran decked heads without rechambered domes & you've never suggested head milling?? Cmon now.
Yeah I agree certain heads need to be redesigned, in this case the Blaster...
This kid is asking about milling the head.. that piped and air filtered Blaster will be fine and gain performance from shaving it.

i guess your still stuck in 2006?