13:1 compression
12-26-2006, 06:54 AM
#2
Junior Member
Join Date: Apr 2006
Location: Gulf Breeze, Florida, USA
Posts: 368
Likes: 0
Received 0 Likes
on
0 Posts
Re: 13:1 compression (CXtypeR)
My friend is for the moment... lots of smoke... hes fixing it. lol. you should get an upgraded head at least! What are your mods?
12-26-2006, 08:15 AM
#3
Senior Member
Join Date: Jul 2005
Location: Armonk, NY, USA
Posts: 3,728
Likes: 0
Received 0 Likes
on
0 Posts
Re: 13:1 compression (type B16)
Are those Formula Atlantic motors? They don't use any production parts--the heads are different castings, the cranks are not factory, practically none of the parts in the motor are oem Toyota. I don't believe that there are 250 hp 4age builds running around with oem heads, blocks and cranks.
Running 13:1 on pump gas is stupid. Why do it? So you can say you have a 13:1 motor, but you have to run 18 degrees total timing? Why not 11.5--make more power and have a more reliable motor? Unless you plan on running 100+. I have a 12:1 motor that I broke in using nothing but 100 octane Sunoco 260 unleaded--now I use a 50/50 mix of 100/93 which gives me around 96-97--I am able to run 29 degrees total timing and more if I use the straight 100 (I was running up to 32 for a little while) but where I am, the Sunoco 260 is $7.99/gallon!!
Running 13:1 on pump gas is stupid. Why do it? So you can say you have a 13:1 motor, but you have to run 18 degrees total timing? Why not 11.5--make more power and have a more reliable motor? Unless you plan on running 100+. I have a 12:1 motor that I broke in using nothing but 100 octane Sunoco 260 unleaded--now I use a 50/50 mix of 100/93 which gives me around 96-97--I am able to run 29 degrees total timing and more if I use the straight 100 (I was running up to 32 for a little while) but where I am, the Sunoco 260 is $7.99/gallon!!
12-26-2006, 09:00 AM
#4
B*a*n*n*e*d
Join Date: May 2005
Location: Hessian Aggression
Posts: 6,291
Likes: 0
Received 0 Likes
on
0 Posts
Re: 13:1 compression (d16dcoe45)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by d16dcoe45 »</TD></TR><TR><TD CLASS="quote">Are those Formula Atlantic motors? They don't use any production parts--the heads are different castings, the cranks are not factory, practically none of the parts in the motor are oem Toyota. I don't believe that there are 250 hp 4age builds running around with oem heads, blocks and cranks.
Running 13:1 on pump gas is stupid. Why do it? So you can say you have a 13:1 motor, but you have to run 18 degrees total timing? Why not 11.5--make more power and have a more reliable motor? Unless you plan on running 100+. I have a 12:1 motor that I broke in using nothing but 100 octane Sunoco 260 unleaded--now I use a 50/50 mix of 100/93 which gives me around 96-97--I am able to run 29 degrees total timing and more if I use the straight 100 (I was running up to 32 for a little while) but where I am, the Sunoco 260 is $7.99/gallon!!</TD></TR></TABLE>
this is honda-tech. that kind of advice falls upon deaf ears. because in about 3 posts, someone will come in here and talk about "his homies lsvtec with ctr pistons that is 13.5:1 that runs on pump gas and it beat this one kids camaro so it must be fine"
Running 13:1 on pump gas is stupid. Why do it? So you can say you have a 13:1 motor, but you have to run 18 degrees total timing? Why not 11.5--make more power and have a more reliable motor? Unless you plan on running 100+. I have a 12:1 motor that I broke in using nothing but 100 octane Sunoco 260 unleaded--now I use a 50/50 mix of 100/93 which gives me around 96-97--I am able to run 29 degrees total timing and more if I use the straight 100 (I was running up to 32 for a little while) but where I am, the Sunoco 260 is $7.99/gallon!!</TD></TR></TABLE>
this is honda-tech. that kind of advice falls upon deaf ears. because in about 3 posts, someone will come in here and talk about "his homies lsvtec with ctr pistons that is 13.5:1 that runs on pump gas and it beat this one kids camaro so it must be fine"
12-26-2006, 11:34 AM
#7
Re: 13:1 compression (xDEFTONESx)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xDEFTONESx »</TD></TR><TR><TD CLASS="quote">this is honda-tech. that kind of advice falls upon deaf ears. because in about 3 posts, someone will come in here and talk about "his homies lsvtec with ctr pistons that is 13.5:1 that runs on pump gas and it beat this one kids camaro so it must be fine"</TD></TR></TABLE>
dude my buddy has a B20/Vtec revving 10K with 14:1 compression that runs 87 grade and beat my other buddies SLR.
dude my buddy has a B20/Vtec revving 10K with 14:1 compression that runs 87 grade and beat my other buddies SLR.
Trending Topics
12-26-2006, 11:42 AM
#8
B*a*n*n*e*d
Join Date: May 2005
Location: Hessian Aggression
Posts: 6,291
Likes: 0
Received 0 Likes
on
0 Posts
Re: 13:1 compression (JDM knowledge)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDM knowledge »</TD></TR><TR><TD CLASS="quote">
dude my buddy has a B20/Vtec revving 10K with 14:1 compression that runs 87 grade and beat my other buddies SLR. </TD></TR></TABLE>
<chuckle> the rev thing is another one that just tickles my taint.
dude my buddy has a B20/Vtec revving 10K with 14:1 compression that runs 87 grade and beat my other buddies SLR. </TD></TR></TABLE>
<chuckle> the rev thing is another one that just tickles my taint.
12-26-2006, 11:46 AM
#9
Honda-Tech Member
Join Date: Jun 2003
Location: Richmond,, British Columbia, Canada
Posts: 1,150
Likes: 0
Received 0 Likes
on
0 Posts
Re: 13:1 compression (JDM knowledge)
Its possible, but i wouldn't reccommend it
I run 13.1:1 on the streets with 94octane and it totally blows *****. My timing sucks and you can't beat on it on the street. When I put in VP104 it runs better but i only get that at the local track.
I should've double checked my calculations first before getting my pistons, I wanted something in the range of 12.0-12.5:1
I run 13.1:1 on the streets with 94octane and it totally blows *****. My timing sucks and you can't beat on it on the street. When I put in VP104 it runs better but i only get that at the local track.
I should've double checked my calculations first before getting my pistons, I wanted something in the range of 12.0-12.5:1
12-26-2006, 01:55 PM
#10
Senior Member
Join Date: Jul 2005
Location: Armonk, NY, USA
Posts: 3,728
Likes: 0
Received 0 Likes
on
0 Posts
Re: 13:1 compression (itralex)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by itralex »</TD></TR><TR><TD CLASS="quote">Its possible, but i wouldn't reccommend it
I run 13.1:1 on the streets with 94octane and it totally blows *****. My timing sucks and you can't beat on it on the street. When I put in VP104 it runs better but i only get that at the local track.
I should've double checked my calculations first before getting my pistons, I wanted something in the range of 12.0-12.5:1</TD></TR></TABLE>
Now here is an honest post that I can appreciate--I appreciate your honesty and frankness about the reality of crazy compression. I think everyone here would love to run 14:1 if they could get away with it on pump gas, but over a certain point you just wind up with a less reliable motor that makes less power than a similar build running more reasonable compression with more timing. Super compression is hell on bearings and what works and doesn't rattle in a 1/4 mile of full throttle may not work to well going up a steep hill in 3rd gear in 100 degree heat.
I run 13.1:1 on the streets with 94octane and it totally blows *****. My timing sucks and you can't beat on it on the street. When I put in VP104 it runs better but i only get that at the local track.
I should've double checked my calculations first before getting my pistons, I wanted something in the range of 12.0-12.5:1</TD></TR></TABLE>
Now here is an honest post that I can appreciate--I appreciate your honesty and frankness about the reality of crazy compression. I think everyone here would love to run 14:1 if they could get away with it on pump gas, but over a certain point you just wind up with a less reliable motor that makes less power than a similar build running more reasonable compression with more timing. Super compression is hell on bearings and what works and doesn't rattle in a 1/4 mile of full throttle may not work to well going up a steep hill in 3rd gear in 100 degree heat.
Thread
Thread Starter
Forum
Replies
Last Post
cornholioEK
Honda Civic / Del Sol (1992 - 2000)
8
05-21-2003 07:22 AM
Charlie Moua
Tech / Misc
43
09-27-2002 04:03 AM
