Checking Squish
- Thread starter OConnor Racing
- Start date
Great video as usual. I did check mine yesterday by the way. This will surely help those who send you topends to insure you get theres on the money.
I now understand all the reasoning behind all the measurements you asked for and I am pulling the jugg of today to get the rest of the dimensions. It was funny that you explained to me yesterday how to do this and i see you made a vid allready.
You gave me a whole new understanding of why this is needed over the phone, at first i was stumped but now that i know what your shooting for i understand 100 percent. Thanx I:I
I now understand all the reasoning behind all the measurements you asked for and I am pulling the jugg of today to get the rest of the dimensions. It was funny that you explained to me yesterday how to do this and i see you made a vid allready.
You gave me a whole new understanding of why this is needed over the phone, at first i was stumped but now that i know what your shooting for i understand 100 percent. Thanx I:I
what should squish be in a hi comp blaster motor?
In our mini quad motors we likes it right around .021
can you tell me where to be to get around 185psi
In our mini quad motors we likes it right around .021
can you tell me where to be to get around 185psi
I know when we milled the head from .031 squish on the solder down to .021 the psi jumped
Would you please explain what works best. Again I am new to blaster motors. Trying to relate what we know from the mini quad scooter motors. I understand what squish band means for a cleaner more centered burn was referring to the solder trick. Appreciate any info and you can pm it if ya want.
Would you please explain what works best. Again I am new to blaster motors. Trying to relate what we know from the mini quad scooter motors. I understand what squish band means for a cleaner more centered burn was referring to the solder trick. Appreciate any info and you can pm it if ya want.
You called the "Quench", squish.....
Actually any time you alter the quench you do affect the engines compression ratio unless you alter it a fashion to where the quench becomes the same as when you first started.
To my knowledge there are only 4 way to alter the Quench and those are by changing
1) the stroke
2) the deck height
3) using a thinner/thicker head gasket
4) piston CH (compression Height) which is the distance from wrist pin to the top of the piston
Quench (squish) is the distance from the top of the piston in relation to the bottom of the head. You can do all the head work you want (shaving) and you will never change the quench but its when you start moving those 4 things I listed and it effects it greatly.
so when you say
I thought this was an engine builder 101...., when you use a thinner head gasket you lower (compress) your quench and raise the engines compression and the opposite the other way around, by using a thicker head gasket you raise the quench and lower the compression ratio.
Its all a numbers game and usually operates in the 0.001" range so if your not good with math, numbers, calipers or the basic functions of an internal combustion engine then I would leave it to the pro's.
Noth'n says lov'n like a shattered piston/cracked head I:I
but what do I know:-/
Actually any time you alter the quench you do affect the engines compression ratio unless you alter it a fashion to where the quench becomes the same as when you first started.
To my knowledge there are only 4 way to alter the Quench and those are by changing
1) the stroke
2) the deck height
3) using a thinner/thicker head gasket
4) piston CH (compression Height) which is the distance from wrist pin to the top of the piston
Quench (squish) is the distance from the top of the piston in relation to the bottom of the head. You can do all the head work you want (shaving) and you will never change the quench but its when you start moving those 4 things I listed and it effects it greatly.
so when you say
it is a false statement.
I thought this was an engine builder 101...., when you use a thinner head gasket you lower (compress) your quench and raise the engines compression and the opposite the other way around, by using a thicker head gasket you raise the quench and lower the compression ratio.
Its all a numbers game and usually operates in the 0.001" range so if your not good with math, numbers, calipers or the basic functions of an internal combustion engine then I would leave it to the pro's.
Noth'n says lov'n like a shattered piston/cracked head I:I
but what do I know:-/
Uhhhhhh. Did you read the question? He asked me where to put his squish to attain a certain compression. Most of your variables are correct but you left out the exhaust port height. Two identical engines with different export port heights will yield different different readings. So why don't you fathom an answer for him? So what squish do you run to attain his requested compression?
When you jump into the lake ( I hope you're holding your nose) and say I can do all of the shaving I want and not affect squish you could never be farther from the truth. Do some research Boss before you come in here and flap your feathers with your one post.
ok not here to start a battle with anyone. I want to build my son a blaster to race mx in a supercross style track setup mainly.
I thought "squish" the thickness of the squished solder being thinner meant the head was closer to the piston effectively increasing compression.
On your video you showed the thickness being around .047 outer edge, what was the compression on that build?
If my outer edge solder measurement was .031ish can you tell me where that would be comp wise?
In my mini engines, the piston came up above the cylinder slightly and we measured .021 was our target. We changed base gaskets as well to affect this, we decked the cylinder and lastly milled the head.
I know when we measured .031 it was around 175psi and when we hit .021 it was between 200-210 and that is where we ran our "scooter" motors in all of our kids mini quads. I know we were the only ones doing it and ours were fast. Everyone else was 160-185psi. Again those were small taiwanese mini quads DRR & Apex motors.
I dont know everything and dont mean to come across that way. I thought I could get good info on here and cant afford to pay someone to do it all. Sucks being on a budget but such is life. I spent all my money on suspension.
Elka stage 4 shocks and custom built +4+1 arms & wider axle. I am not trying to make an engine to run with a professionally built airsol firebreather or ct kit. I believe you make a faster rider with great suspension than a quad with crap suspension and a bad azz motor. I will be buying an airsol 200 kit in a few months, but for now we have a month before 1st race of season.
I appreciate any help or advice
I thought "squish" the thickness of the squished solder being thinner meant the head was closer to the piston effectively increasing compression.
On your video you showed the thickness being around .047 outer edge, what was the compression on that build?
If my outer edge solder measurement was .031ish can you tell me where that would be comp wise?
In my mini engines, the piston came up above the cylinder slightly and we measured .021 was our target. We changed base gaskets as well to affect this, we decked the cylinder and lastly milled the head.
I know when we measured .031 it was around 175psi and when we hit .021 it was between 200-210 and that is where we ran our "scooter" motors in all of our kids mini quads. I know we were the only ones doing it and ours were fast. Everyone else was 160-185psi. Again those were small taiwanese mini quads DRR & Apex motors.
I dont know everything and dont mean to come across that way. I thought I could get good info on here and cant afford to pay someone to do it all. Sucks being on a budget but such is life. I spent all my money on suspension.
Elka stage 4 shocks and custom built +4+1 arms & wider axle. I am not trying to make an engine to run with a professionally built airsol firebreather or ct kit. I believe you make a faster rider with great suspension than a quad with crap suspension and a bad azz motor. I will be buying an airsol 200 kit in a few months, but for now we have a month before 1st race of season.
I appreciate any help or advice
Quench is the combined values of your deck clearance (top of piston to top of deck @ TDC) and your compressed head gasket thickness. In this case a pieces of solder is being used to check it, which may give you a rough estimate but is no where accurate for wanting to run tight tolerances, but yeah, the closer you bring the head to the piston, the greater the compression ratio the more power you make but also run the risk of detonation or removing too much material and having the piston hit the spark plug.
Just the head gasket alone is .031" thick installed and thats not including how far down in the hole your piston is. Just for an example if your piston is sitting .009" down in the cylinder @ TDC and you add that number to you head gaskets thickness value you would have a quench of .040" (.031 + .009 =.040) but from your post I think you already know most of it but I believe you should be able to find a compression calculator somewhere on the Internet, you will just need to know all the "fine details", down to deck height, piston comp height, stroke, cc's of the head.....etc.
Just the head gasket alone is .031" thick installed and thats not including how far down in the hole your piston is. Just for an example if your piston is sitting .009" down in the cylinder @ TDC and you add that number to you head gaskets thickness value you would have a quench of .040" (.031 + .009 =.040) but from your post I think you already know most of it but I believe you should be able to find a compression calculator somewhere on the Internet, you will just need to know all the "fine details", down to deck height, piston comp height, stroke, cc's of the head.....etc.
it's 2 different ways of doing things, most of the time it seems like they call it squish in the 2 stroke world, and quench everywhere else. I'd say calling it squish comes from the part of the head that they call the "squish" band.
Calculating the quench/squish would be the preferred way IMO but most people don't have the proper tools to measure it, this solder trick will do it for 90 percent of the builds that would happen on here
Calculating the quench/squish would be the preferred way IMO but most people don't have the proper tools to measure it, this solder trick will do it for 90 percent of the builds that would happen on here
quench this, squish that, and fug them both and anyone on here that questions what ken says or does, bring anything you have to my trails, and i'll be waiting for you at the next turn in the trail, cause my ken oconnor built motor absolutely, fuggin arm wrenching, rips sh*t up !!!!!!!!!!!!!!
alot of his videos (which have all been phenominal) are explained in laymans terms, that he knows most of us will understand, or at least the one who asked the question will, so take your wikipedia terminology somewhere else, the regulars on here know what he meant, come on here and try to change the terminology from squish to quench, baaaaaaaahahahahaaa, get back to reading bro, and stay outta this
and if anyone else, riders or builders, are gonna rip ken for posting videos, that no one else dare too, then go get the camera out and let us see what you have ????? my guess is way too much time to read, period.
alot of his videos (which have all been phenominal) are explained in laymans terms, that he knows most of us will understand, or at least the one who asked the question will, so take your wikipedia terminology somewhere else, the regulars on here know what he meant, come on here and try to change the terminology from squish to quench, baaaaaaaahahahahaaa, get back to reading bro, and stay outta this
and if anyone else, riders or builders, are gonna rip ken for posting videos, that no one else dare too, then go get the camera out and let us see what you have ????? my guess is way too much time to read, period.
lol omg, leave the poor guy alone haha i didnt get the impression he was talking sh*t at all. geeeeezus christ guys......
You called the "Quench", squish.....
so if your not good with math, numbers, calipers or the basic functions of an internal combustion engine then I would leave it to the pro's
and ....................
so when you say
Quote:Originally Posted by OConnor Racing
Squish is not a function of compression.
it is a false statement.
I thought this was an engine builder 101 <<<< especially this sh*t
/\/\/\ that all smells like sh*t on his breath to me
to even question like he did,
(engine building 101, and leave it to the pro's)
he's gotta be smokin crack !!!!!!!
trying to down play what ken has done for this site, and has been doing for his local riders,< who have the championships and trophy's to prove his engine building knowledge, plus come on here and share what he knows freely, with videos, unlike ANY other builder out there, who think they know some big secrets about these motors
this just doesn't float with me
i have personally been to kens shop, and seen with my own eyes, the precision, calculations and professional work with my own eyes,
and also sat his ported cylinders side by side with "ALL" others,
"yeah he has one by ALL the others",
trust me, there is no comparison to kens work, not even close !!!!!
dont make me break out the pictures
not to mention the arm ripping power his work has provided me
ken has forgotten more than this "quench" asswipe will ever know
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yeh lol, but i am gunna listen to ken over a guy with 4 posts, not saying he dont know what he is talking about, but ken is a blaster god lol
sorry gridlock, it would have went a little better if u had introduced yourself to us and maybe explained what u do, not just come in here saying stuff my sister could copy and paste of wiki
how bout u start an intro thread and maybe show us some more pics of your bike
