To bore or not to bore... that is the ?
#1
Honda-Tech Member
Thread Starter
Join Date: Feb 2002
Location: NC, USA
Posts: 713
Likes: 0
Received 0 Likes
on
0 Posts
To bore or not to bore... that is the ?
Some may have paid attention to my sleeving post recently.. anyways I am getting ready to have my b16 block sleeved. Most sleeves can be bored to 84-85 mm.. my question is the extra displacement worth the thinner walls? obviously im going to be pushing alot of boost (at least 18psi normally and 28-30psi track im hoping).
#2
Man U FTW
Boost in this case is irrelevant; however, if i was to spend the money necessary to get an engine sleeved, i would not start out with anything larger than an 83mm bore. You CAN start with something larger, but if it ever did come apart, you wouldnt have a lot of room to hone and rubuild.
#4
Honda-Tech Member
Re: (ShortbusEK)
stock bore on a b16 is all you need to start with, save that 82-84 untill you NEED it, no need to start with it and end up having to resleeve
i made 503 on stock sleevs on 21 psi with crower/weisco combo.. never had a problem, HG blew and it was time for a full build
i made 503 on stock sleevs on 21 psi with crower/weisco combo.. never had a problem, HG blew and it was time for a full build
#5
Honda-Tech Member
Thread Starter
Join Date: Feb 2002
Location: NC, USA
Posts: 713
Likes: 0
Received 0 Likes
on
0 Posts
Re: (turbociv910)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbociv910 »</TD></TR><TR><TD CLASS="quote">stock bore on a b16 is all you need to start with, save that 82-84 untill you NEED it, no need to start with it and end up having to resleeve
i made 503 on stock sleevs on 21 psi with crower/weisco combo.. never had a problem, HG blew and it was time for a full build</TD></TR></TABLE>
Who are you? i might know you? im in good ole wilmiwood myself
i made 503 on stock sleevs on 21 psi with crower/weisco combo.. never had a problem, HG blew and it was time for a full build</TD></TR></TABLE>
Who are you? i might know you? im in good ole wilmiwood myself
#6
Honda-Tech Member
Join Date: Nov 2002
Location: FONTANA, CA, UNITED STATES
Posts: 827
Likes: 0
Received 0 Likes
on
0 Posts
Re: To bore or not to bore... that is the ? (ShortbusEK)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ShortbusEK »</TD></TR><TR><TD CLASS="quote">Some may have paid attention to my sleeving post recently.. anyways I am getting ready to have my b16 block sleeved. Most sleeves can be bored to 84-85 mm.. my question is the extra displacement worth the thinner walls? obviously im going to be pushing alot of boost (at least 18psi normally and 28-30psi track im hoping). </TD></TR></TABLE>
Thats not that much boost. I've run 48PSI on a 84.50mm bore. You will be fine at 84mm and if you hurt the motor, you can go 84.5mm and so on.
Thats not that much boost. I've run 48PSI on a 84.50mm bore. You will be fine at 84mm and if you hurt the motor, you can go 84.5mm and so on.
#7
Honda-Tech Member
Thread Starter
Join Date: Feb 2002
Location: NC, USA
Posts: 713
Likes: 0
Received 0 Likes
on
0 Posts
Re: To bore or not to bore... that is the ? (PHDZINE)
ok so my ALOT of boost is not the same as you ALOT of boost but im also talking about a car im gonna be driving on a semi normal basis and I want it to last.. but say I did bore it out to 84mm thats 3mm off the thickness of the cylinder wall.. is the extra displacement worth weakening the cylinder walls for what we might as well call a DD.. what kind of HP/TQ gain am I looking at from the extra displacement?
Trending Topics
#8
Honda-Tech Member
Join Date: Nov 2002
Location: FONTANA, CA, UNITED STATES
Posts: 827
Likes: 0
Received 0 Likes
on
0 Posts
Re: To bore or not to bore... that is the ? (ShortbusEK)
I'm trying to tell you that if I can boost 48psi and your only going to boost 26psi, you'll be fine. When I drove my car <U>daily</U> on a Greddy T78 I was tuned for 19PSi on pump and 30 PSI on race gas, this was on 84mm pistons. I had no problems for 2 years and that was at least 60 miles a day. Aftermarket sleeves are alot stronger than you would think.
#9
Honda-Tech Member
Re: To bore or not to bore... that is the ? (PHDZINE)
We've run 60psi on 85mm bore with no problems. If you're going to sleeve, might as well take advantage of the displacement that can be gained, it makes a significant difference in power, torque, and spool. There is NO downside to bigger bore. I start all my motors at 84mm bore. You can blow it up 3 times before it's junk, and if you get to that point you really need to re-evaluate things because you shouldn't be blowing up that many motors. haha
#10
Honda-Tech Member
Join Date: Nov 2005
Location: Wouldnt you like to know
Posts: 1,421
Likes: 0
Received 0 Likes
on
0 Posts
Re: To bore or not to bore... that is the ? (tony1)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 »</TD></TR><TR><TD CLASS="quote">We've run 60psi on 85mm bore with no problems. If you're going to sleeve, might as well take advantage of the displacement that can be gained, it makes a significant difference in power, torque, and spool. There is NO downside to bigger bore. I start all my motors at 84mm bore. You can blow it up 3 times before it's junk, and if you get to that point you really need to re-evaluate things because you shouldn't be blowing up that many motors. haha</TD></TR></TABLE>
Is there any significant reason to go to 84 over 83mm? does that minimal amount make a difference?
Is there any significant reason to go to 84 over 83mm? does that minimal amount make a difference?
#11
Honda-Tech Member
iTrader: (2)
Join Date: Jan 2004
Location: DFW
Posts: 2,434
Likes: 0
Received 0 Likes
on
0 Posts
Re: To bore or not to bore... that is the ? (tony1)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 »</TD></TR><TR><TD CLASS="quote">We've run 60psi on 85mm bore with no problems. If you're going to sleeve, might as well take advantage of the displacement that can be gained, it makes a significant difference in power, torque, and spool. There is NO downside to bigger bore. I start all my motors at 84mm bore. You can blow it up 3 times before it's junk, and if you get to that point you really need to re-evaluate things because you shouldn't be blowing up that many motors. haha</TD></TR></TABLE>
True story
True story
#12
Honda-Tech Member
Thread Starter
Join Date: Feb 2002
Location: NC, USA
Posts: 713
Likes: 0
Received 0 Likes
on
0 Posts
Re: To bore or not to bore... that is the ? (red_crx)
point taken.. 84mm bore here i come.. does anyone know what the math is to calculate the extra displacement gained from the extra bore??
#13
Honda-Tech Member
Join Date: Dec 2003
Location: bumfuck egypt, SD, US
Posts: 920
Likes: 0
Received 0 Likes
on
0 Posts
3.14 x radius squared= area of a circle..x stroke = displacement of cylinder..x 4 cylinders= displacement of the motor..come on, I dropped out of high school and I know this..
Thread
Thread Starter
Forum
Replies
Last Post