Im at the early stages of an LS V-Tech build
this is the first motor thats all mine!!!

The block is a 95 b18a standard bore
Im planning on using:
probe high comp Pistons
probe rods

The head is a 99 B16a
i have skunk2 stage2 cams
skunk2 springs and retainers
*need valves*

What comp do you recomend for the pistons? lets not get out of hand it maybe a daily driver at some point soon

If i have skunk2 springs and retainers should i use Skunk2 valves or can i go with JG Engine dynamics flat faced valves?

Let me know what you all think


Modified by oianarchy at 8:40 PM 3/28/2006

 

The stock valves work fine don't waist your money. As far as your cr goes I don't recommend more than 11.0 to 1 for a pump gas motor. Some on this board think I crazy about this but if they don't want maximum life out of there motor that is there choice. As far as your piston choice I would use some oem cast pistons. Better for street use unless you want to run a lot of nitrous. You will have to run arp/ls rods with oem pistons. Dan

 

Just curious,why would you reccomend 7 year old used valves VS new ones?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF &raquo;</TD></TR><TR><TD CLASS="quote">Just curious,why would you reccomend 7 year old used valves VS new ones?</TD></TR></TABLE>

yeah my valves are done. I deffinitly need new ones, should i still use stock ones or go flat faced?

 

If the stem wear is in spec there is nothing wrong with old valves unless you are talking about an air cooled VW exhaust valve. Dan

 

some one had to mention the VTECH so it might as well be me

VTECH hehe

 

just get the omnipower valves. uses the same material as OEM, with a flat faced to give more compression.

 

how bout pistons and rods. Im not trying to spend a **** load but im not trying to buy junk either. Drop a link

 

Keep the stock LS rods, and fasten them to the crank with some 8mm ARP rods bolts.

Also look into PR3 or P30 pistons. They must be pressed on the rods, because they are a factory piston. Both of those can be found in different variations of the B16.

With the PR3's, you'll be at around 11.3:1 compression, and with the P30's you'll be around 11.5:1 compression.

I personally run the P30's.

- Derek

 

You can run more than 11:1 compression on pump gas

mine is at 11.8:1 running on 91 octane

it is all in the tuning

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMdc2lsVtec &raquo;</TD></TR><TR><TD CLASS="quote">You can run more than 11:1 compression on pump gas

mine is at 11.8:1 running on 91 octane

it is all in the tuning</TD></TR></TABLE>

I second that.

 

If you go with p30 pistons, your compression ratio will be closer to 12.1:1 see the following site below:

http://www.zealautowerks.com/

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dan Ruddock &raquo;</TD></TR><TR><TD CLASS="quote">If the stem wear is in spec there is nothing wrong with old valves Dan</TD></TR></TABLE>

Nice answer

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mar778c &raquo;</TD></TR><TR><TD CLASS="quote">If you go with p30 pistons, your compression ratio will be closer to 12.1:1 see the following site below:

http://www.zealautowerks.com/</TD></TR></TABLE>

...Not with a B16 head, chief.

EDIT: That compression calculator contradicts the widely used C-Speed Racing one.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mar778c &raquo;</TD></TR><TR><TD CLASS="quote">If you go with p30 pistons, your compression ratio will be closer to 12.1:1 see the following site below:

http://www.zealautowerks.com/</TD></TR></TABLE>

That site is cool as ****

 

May be 'cool as ****,' but many consider it incorrect.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D-Rob &raquo;</TD></TR><TR><TD CLASS="quote"> That compression calculator contradicts the widely used C-Speed Racing one.</TD></TR></TABLE>

C-speed is the only one I really trust, my set up is wth p30 pistons and a gsr head, I punched in the number and an 11.8:1 came out

all other calulators ive used have said 12.4:1 or something higher and seemed way off, c-speed knows what they are doing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMdc2lsVtec &raquo;</TD></TR><TR><TD CLASS="quote">

C-speed is the only one I really trust, my set up is wth p30 pistons and a gsr head, I punched in the number and an 11.8:1 came out

all other calulators ive used have said 12.4:1 or something higher and seemed way off, c-speed knows what they are doing </TD></TR></TABLE>

Exactly. Thank you.

 

lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMdc2lsVtec &raquo;</TD></TR><TR><TD CLASS="quote">You can run more than 11:1 compression on pump gas

mine is at 11.8:1 running on 91 octane

it is all in the tuning</TD></TR></TABLE>

Do you think 11.8:1 good for a daily driven motor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D-Rob &raquo;</TD></TR><TR><TD CLASS="quote">May be 'cool as ****,' but many consider it incorrect.</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMdc2lsVtec &raquo;</TD></TR><TR><TD CLASS="quote">

C-speed is the only one I really trust, my set up is wth p30 pistons and a gsr head, I punched in the number and an 11.8:1 came out

all other calulators ive used have said 12.4:1 or something higher and seemed way off, c-speed knows what they are doing </TD></TR></TABLE>

Well, during the compression ratio debate the c-speed calculator at the time seemed to be off by quite alot especially concerning PCT pistions.

If you know the correct piston to deck hieght then it seems to work.

see here
https://honda-tech.com/zerothread?id=1245459

and here
https://honda-tech.com/zerothread?id=717928
That thread used to be a sticky.

Like anything it should be used with advisement.

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

...Not with a B16 head, chief.

EDIT: That compression calculator contradicts the widely used C-Speed Racing one.</TD></TR></TABLE>
Go back and read a little more, little indian.

 

it's VTEC not v-tech , that is a phone

 

oops

 

Do you think 11.8:1 good for a daily driven motor?

 

I daily-drive my P30/B16 headed-LSVTEC.

It burns some oil and smokes, but that's my valve seals.