jt-sport

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by allmotor one &raquo;</TD></TR><TR><TD CLASS="quote">3+mm there is more safe for your engine!
iam running 1.8mm all of the day with 10K rev without any problem.

</TD></TR></TABLE>

is that Exhaust Valve to Piston clearence? or that was intake?

Its kinda new to me for running Exhaust P2V under 3mm, because i also new in B series world..

my last SOHC all motor blew up running 2.5ish exhaust P2V when missed gear above 10K, thats why im bit traumatized...

allmotor one

sorry, iam forgot!
iam runing 1.8mm clearance on EX V-P and 1.5mm on INT V-P.

are you sure the last Sohc of yours is blew that cause from V-P clearance not V-V clearance?
Sorry, just to know!

1 2 NV

pretty good post, who wrote it?

Combustion Contraption

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1 2 NV &raquo;</TD></TR><TR><TD CLASS="quote">pretty good post, who wrote it? </TD></TR></TABLE>

CC

jt-sport

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by allmotor one &raquo;</TD></TR><TR><TD CLASS="quote">sorry, iam forgot!
iam runing 1.8mm clearance on EX V-P and 1.5mm on INT V-P.

are you sure the last Sohc of yours is blew that cause from V-P clearance not V-V clearance?
Sorry, just to know!
</TD></TR></TABLE>

seems like P-V... because that was only exhaust valve that destroyed.. the intake valve still in shape..

BTW what is your camshaft sir?

im running pro 3 with supertech springs on stock retainer...
yesterday im still affraid of floating because of that stock retainer weight..
but with my clearence that you guys said was more than ennough safety zone.. i could sleep well tonight

@ 1 2 NV thanks for your input sir, you always provide the best for knowledge by your wrote up...


BTW, do you have a wrote up for "how to improve 60ft" ?? your 60ft was a baddass...

we here in indonesia still running 1.9 to 2.0 on slicks

1 2 NV

i wish i had a secret on how to 60' better but i dont. i feel my car should run low low 1.6s and high 1.5s and i have never hit 1.5s yet. the best ive ran was a 1.61.
ask some guys that know AM cars, im 60' retarded.

IN VTEC

iTrader: (3)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fei &raquo;</TD></TR><TR><TD CLASS="quote">Hello everyone why checking V2V have to set the valve lash to 0.00? Why not set it as the cam spec? I had skunk2 H22A Pro 2 Cams. it said peak life at 100* ATDC does that peak life at Vtec lobe or normal lobes? </TD></TR></TABLE>
I set our's with the valves lashed to spec because that's how the clearances were given to us.

We haven't had an issue so far. The motor does 10.5k regularly and did 11.2k on a misshift once for a split second and compression is still fine.

ef92b

just installed a customer's S2S2 on his B20VTEC yesterday.

with the cylinder head on the block, i had to install the soft test springs ofcourse as well as lock the vtec lobes using the ball bearing. everything went in smoothly. thanks to 12NV and CC lol for this write-up it get's better and better the more i do it.

so now with some pics.



spare me for those rocker pads! some sh!tty cams w/c almost wiped out the pads were installed earlier and for merely 109miles in them since they were in.

Mr. Mike Belben's kit in action once again!



exhaust cam's 103 deg centerline @ 0.468"/11.9mm max lift.





reading from 0.45" initial preload:



the exhaust cam was dead spot on from the beginning. However, the intake cam has to be advanced at the cam gear by +5.5 marks to meet the intake's centerline at 103 deg as well as per the S2S2 spec sheet.



while using my spare stock B16 head which i used earlier to check V2V, it showed 0.038" min. with 0 EX and +6 IN so am within safety margins.





Modified by ef92b at 1:47 PM 11/7/2008

ef92b

thinking ahead, i had this nut fab'd earlier to ease in rotating the crank while the engine's in the bay.

DB2-R81

Were these cams symmetrical? Relying on the centerline has its downfalls.

96Spec Ek

I made a new thread here-> https://honda-tech.com/forums/all-motor-naturally-aspirated-44/need-some-input-measuring-p2v-clearance-2490451/



I know this thread has been dead for a while but I'm looking for some insight on measuring p2v clearance on my pro2 ls/vtec w/ pr3's. Well hopefully someone may read this and lend me their thoughts. Set the #1 piston to tdc and set the dial indicator on the exhaust and intake to zero with the cam gear set to zero. I then started taking measurements at different cam gear settings resetting the dial indicators to zero for each increment. My intake side measurements look right on the money. The exhaust side I have set to 0,-2,-4 and got the same reading of .026" Not until -6 did the clearance get to .012"

Heres the chart with p2v clearance at tdc.

-6 -4 -2 0 +2 +4 +6
exhaust .012 .026 .026 .026 .026 .026 .026
intake .103 .078 .058 .035 .009 .000

blinx9900

Great thread!!

hovic

thanx to 1 2 NV for taking the time to answer all my questions.

This thread is very informative. I´ll take is as a "how to" to check all my valve clearences this week. I´ve already ordered the belben kit. Can´t wait to work with it hehe.

jeff652

iTrader: (1)

wow I need one of these kits. Anyone have one for sale?

ranta18

Who needs all those crazy dial gauges and wheels, try this:
Before:

After:


Haha. Jk. Just saying... claying is another option.

eDm cRxXx

Thanks alot for this thread, it has helped me alot!

But, I have one question. Are you shure it is best to do these tests without the headgasket?

I have done all this on a b18c with mahle 12.5:1 pistons and S2P2 cams. The head has new valves, but they are stock size. The problem is that when the piston is in excactly TDC the EX valve hits the piston outside of the valve relief, and on the intake there is so little (NONE) clearance that the valve sticks in the valve relief in the piston. If I turn the crank a little out of TDC there is no problem.

I suppose this is because without the headgasket the valve hits the piston a bit lower. Do you not use headgasket because if it works without the headgasket you know that you have more than enough clearance from the valve to the "valve relief wall" with the headgasket on?


Do you guys think I need to clay the engine?

IN VTEC

iTrader: (3)

If you use a small change in lift on both sides of the centerline (peak lift), you can find the centerline pretty accurately.

Latest cylinder head I did. I just happens to be my GS-R head that I clearanced for Skunk2 Tuner Stage 1's. Stock-sized Ferrera valves with minimal deck and stock head gasket.

Lash was set to zero for the clicking clearance results below, so I've got room to play.

egycasper16

can you show how to take a regular BB and install it in the rocker arm behind the small VTEC pin to hold the 3 rockers in "VTEC". every step by pictures because i cant degree my s2 pro cams without locking vtec lobe.

trrbl1bmx

Where can I buy this degree kit, the links are dead!!! Someone PM me if they know!!!

spoonhatchblack

What type of gauge is the one used in the pics?

tepid1

Xenocron sells them

nus_dogg

I will be installing my S2P2 in my JDM H22. What degree should I put them at? I know 0,0 degree isn't good?

nus_dogg

Where's the VTEC pin hole? so I can install the BB. Also, where can I get the "Check Spring"??

eg6madness

Stumbled over this post recently since i am building my motor and i would like to check my p2v.
Everything is pretty comprehendable. how ever i have one question.

I am using stock springs and retainers to check my p2v , since i cant get hold of any check springs and i dont want to have to pay shipping and import duty since i dont live in the US.

so my question is using my stock spring and retainer , after i have rotated the motor to TDC and zeroed the dial gauge then zeroed the gauges on the valves. how do i get them pushed down to get the reading?

I am using the outer spring, should i swap that and just use the inner spring spring since is is not as stiff?

even if i do . how do i push on them ?

tepid1

I use just the inner spring. That's my "check" spring. I typically push down on the valve head with a 1/4" drive socket extension. That way it doesn't skew my readings from the retainer.