i currently have a b18c-r with stock internals and i am planning to drop in jun2 intake, ctr pistons and supertech nitride flat dish valves. i read somewhere that i could use my stock itr springs/retainers with the jun2 cam..true/not true? also, if the compression is going to be a problem, i will do with out the valves.... any info would be appreciated. thanks in advance.

 

pm'ed

 

that's a good question i have a ctr also .. i was wondering about changing the valves to flat faced

 

PCT pistons and flat faced valves will definatley put you in the 13's even without milling the head....

 

is that a bit much for daily driver? i just want it to be safe enough to get on every once and a while...i am looking to get tuned soon after..

 

without the valves, just ctr pistons, thats ok though right?

 

:: bump:: i still am wanting to do this but would like more insight...thanks

 

http://www.c-speedracing.com/h...c.php

 

About valvetrain:

Stock yellow ITR Valvetrain can handle up to 11.6 lift
June Type 2 cams have 12.0 lift so it could be to big.

 

you said jun2 right? I'm assuming that classifies it as a stage 2.

And from <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LooboRR &raquo;</TD></TR><TR><TD CLASS="quote">About valvetrain:

Stock yellow ITR Valvetrain can handle up to 11.6 lift
June Type 2 cams have 12.0 lift so it could be to big.</TD></TR></TABLE>
that, those specs show that you will need valve train to accommodate for the higher lift cam.

That seems small, .4, but it could mean the difference between safe running or disaster, especially if you run such high CR.

13 is a bit high for DD. it's been done before but with an extremely careful tune. I wouldn't recommend it for DD though, it'd be harsh.

 

using that compression calculator i got a 11.75cr.... that doesnt seem to high...did i do something wrong?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by prjctwhteg &raquo;</TD></TR><TR><TD CLASS="quote">that's a good question i have a ctr also .. i was wondering about changing the valves to flat faced </TD></TR></TABLE>

type r's come with flat valves

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by p0gi_b0i_integra &raquo;</TD></TR><TR><TD CLASS="quote">using that compression calculator i got a 11.75cr.... that doesnt seem to high...did i do something wrong? </TD></TR></TABLE>

that calculator is not completly dea don, there is a trhead about compression and pct pistons. search for it. people did the full out calculations fr stuff.

 

dont spread mis-information dude

 

well im not so...

read this entire thread

https://honda-tech.com/zerothread?id=717928

then comment on it.

c-speed told him he was gonna get 11.7:1 correct, except according to omniman, and the hand calculations done of a b18c block with a p72 head the ratio sis actually

STD = 12.924594026551906
.25 OS = 12.989047869209281

see the issue?

 

Why do you want to add weight to your valvetrain? Using flat face valves is never a good idea. CTR pistons are also never a good idea outside of 1.6 engine. Put some US-R pistons in there and call it a day. It will be much easier to tune and much more forgiving if something goes a stray. Like the possibility of getting some old gas etc.

 

i would go as low as us-r pistons. the p30's would be great, i love mine.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by p0gi_b0i_integra &raquo;</TD></TR><TR><TD CLASS="quote">i currently have a b18c-r with stock internals and i am planning to drop in jun2 intake, ctr pistons and supertech nitride flat dish valves. i read somewhere that i could use my stock itr springs/retainers with the jun2 cam..true/not true? also, if the compression is going to be a problem, i will do with out the valves.... any info would be appreciated. thanks in advance.</TD></TR></TABLE>
stop telling him to get type R pistons

 

if you were referring to me it was a typo, i meant wouldnt get us-r pistons.

p30's are the best bet in my experience.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by killerpenguin21 &raquo;</TD></TR><TR><TD CLASS="quote">p30's are the best bet in my experience.</TD></TR></TABLE>

Why and what is your experience?

 

my experience is two of my own motors with them. they make nice street compression and give you a nice cr for a wide range of cams. the us type r pistons are a little low on the comp side for my personal tastes and could wind up limiting your cam choice and power levels. also in re reading the op it says he has a b18c-r which im gonna assume is him saying he has a type r as it is anyway.

either way pct's are a bad idea

 

i think zap dude was pertaining to the guy who said.. R's come with flat valves..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4g hatch &raquo;</TD></TR><TR><TD CLASS="quote">type r's come with flat valves</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zap &raquo;</TD></TR><TR><TD CLASS="quote">dont spread mis-information dude </TD></TR></TABLE>

my post is for 4g hatch

sorry for the confusion killerpenguin21

 

p30's are probably the best choice to upgrade his motor for his purpose, but pct will make a more powerful setup.
I know a guy that drives a gsr with ctr pistons as his daily his been driving it for like 3 years now..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sloshy &raquo;</TD></TR><TR><TD CLASS="quote">p30's are probably the best choice to upgrade his motor for his purpose, but pct will make a more powerful setup.
I know a guy that drives a gsr with ctr pistons as his daily his been driving it for like 3 years now..
</TD></TR></TABLE>

how is he doing this? is it a smooth ride? i'm not doubting you, honestly curious..... im thinking im not going to do this anymore. just keep my bottom end the same and put my cam and tune....

to summarize :: ctr pistons are flat dish valves are bad.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Natural Aspirations &raquo;</TD></TR><TR><TD CLASS="quote">Why do you want to add weight to your valvetrain? Using flat face valves is never a good idea. CTR pistons are also never a good idea outside of 1.6 engine. Put some US-R pistons in there and call it a day. It will be much easier to tune and much more forgiving if something goes a stray. Like the possibility of getting some old gas etc.</TD></TR></TABLE>


what else could i do to the head, parts wise, to gain hp? after the tune i want to be able to get great gas mileage with optimum power.... thats not unrealistic is it?