just purchaced some jun IIIs for my b20 vtec. what comp. piston should i get for daily driven on 91 oct? lookin for most power. thanks

 

id say 12ish:1

 

what kind of valve springs/retainers etc would u be using with those JUN III's

 

y dont ya just do a ****** search. jesus christ we have compression and cam questions posted up daily.

 

and as we can all see now, dustin has had a wonderful day, but ya there has been many posts about this, those cams will love higher compression.....

 

as a matter of fact i did. got up at BFE walked around in the woods for awhile, didnt shoot a ****** thing. came home mowed the lawn, fell asleep woke up and spent the rest of the day on my ***.

 

damn hillbilly. lol nice to see your not in the city shootin things haha

 

ahh there was this black cat in my backyard last week. when i got my gun he took off. either way any cat neighbors or not is on my their death bed when they roam into my yard.

 

no need to be a dick. if didnt have any positive output you could have kept that bullshit to urself.

 

im going to be be runnin portflow springs and retainers.

 

Why don't you use the Jun springs, and retainers? That would probably be best...

 

i agree... better to use jun valvetrain

 

i figure since portflow is strong enough to support em i may as well save my $. i kno a couple people runnin jun3s with portflow valve train componets and holds up very well. (hard driving)

 

shoulda got some EF-1 M23's... save some $

 

i got these for just about nothin. no outta pocket cost u can say. and they clean.

 

just get some itr pistons and mill the head a little bit...around 11:5:1 on 91 octane will be just about right

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by junya16 &raquo;</TD></TR><TR><TD CLASS="quote">just get some itr pistons and mill the head a little bit...around 11:5:1 on 91 octane will be just about right</TD></TR></TABLE>

I hate to be the one to point this out but...
B20 is 84mm bore.
ITR is 81mm bore.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b19coupe &raquo;</TD></TR><TR><TD CLASS="quote">

I hate to be the one to point this out but...
B20 is 84mm bore.
ITR is 81mm bore.</TD></TR></TABLE>

but haven't you been around h-t alot lately? This is the second time i've seen people say put in type R pistons.
However, last time it was CTR pistons in a block bored to 84.5 mm

i guess they all know soemthing i dont know

 

theres prolly 10 other posts about the same thing within the last 2 weeks so its easier to do a quick search than ask dumb questions. if not, go look at importreview to look at dynos. we get the same idiotic questions daily and im sure im not the only one that gets tired of seeing the same **** every day on HT. just most ppl are too internet friendly to say anything.

 

so tell me this (1 2 NV), u nrather stop on a thread and say some dumb *** **** rather than just going to the next one? can u tell me y so we can bee eye to eye. cause that no ****** sense to me.
look man im not trin to tall **** through the computer. i do research but sometimes **** dont add up, so why not get more resources. differant people knows differant ****. (knowledge is supreme)
so i m askin u to drop this **** cause nothing goin to accomplished.

 

get a better timing belt. better be safe than sorry.

$170 can save thousands

 

totally forgot that the motor was a b20....my bad...but for 84mm i'm going w/ 11:3:1 cp pistons...i'll let you know how it goes....runnin overbore ctr's in a 1.8 gsr right now and its not workin out so well..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by junya16 &raquo;</TD></TR><TR><TD CLASS="quote">totally forgot that the motor was a b20....my bad...but for 84mm i'm going w/ 11:3:1 cp pistons...i'll let you know how it goes....runnin overbore ctr's in a 1.8 gsr right now and its not workin out so well..</TD></TR></TABLE>


is there any way to properly calculate compression ratio in relation to piston size etc.

i have a b20 but am so confused about compression ratio and piston size that now im just scared to ask ppl what compression i should be at.
QUestion- How can I find out what is a safe yet reliable 91 octanne application? piston size etc.

 

Not to be dick but aren't you going to need more then 11.5-12.1 compression to get the full potential of those cams. But I do understand you only can get 91 octane gas. I"m just saying you might not be to happy with the power if the compression is that low.

 

(goforbroke) are u sayin 11.5 - 12.0 c/r isnt goin to be enough to let my cams shine?