Circuit Star-29

EDIT: ALWAYS break in your motor before you take it to a tuner...and if a "Carb" tuner gives you a dyno on a motor that is FRESH....doubt it Seriously.


Modified by C-speed Racing at 1:22 PM 4/25/2005

dustin

Hmm check cam timing

Circuit Star-29

It looked like the belt slipped two teeth on the intake side...fixed but same results.

dustin

hmm verify that the pistons didn't hit valves then hehe

Circuit Star-29

builder of the motor said it was next to impossible but we are checking that currently. #1 and 2 looks good so far.

Any other ideas?

dustin

does the motor act like the compression is low? Does this compression tester test other motors fine?

B20luda

tight valves??

Circuit Star-29

The motor sounds like it doesnt have any comp. After the cam gear fix it sounded better but Crescent is testing his motor right now to see if the tester is KO...all cylinders are fine...


This sucks...

Circuit Star-29

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B20luda &raquo;</TD></TR><TR><TD CLASS="quote">tight valves??</TD></TR></TABLE>


???

Tester works normally

dustin

uh oh!

try the 1tsp oil in each cyl trick... see if it is head or ring related..

maybe it's 5:1 CR... hehe... run 40lbs boost on 87octane

Circuit Star-29

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

try the 1tsp oil in each cyl trick... see if it is head or ring related..

maybe it's 5:1 CR... hehe... run 40lbs boost on 87octane </TD></TR></TABLE>

The thing is is that the Comp is close all across....hmmm.. Don't know....

Rings have to be good...2% leak down in ALL cyl.

dustin

Seems like it must be cam-&gt;crank timing related to me then! Can you get 16deg timing with the typical distributor position?

Circuit Star-29

Well, I don't know...but I just looked over and Crescent is pulling the motor apart so I guess we'll find out whats wrong.

LOL..........AAAAAAAAAAAHHHHHHHHHHHHh..this sucks...

m R g S r

if leakdown is good, doesn't that mean the valves have to be sealed at the time of testing?

so they are not bent, just opening and closing at the wrong time, aka timing is off....

gsrboost

Why is the compression so low? My 9:1 block got 170 across the board.

dustin

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrsp33d &raquo;</TD></TR><TR><TD CLASS="quote">Why is the compression so low? My 9:1 block got 170 across the board.</TD></TR></TABLE>

I'm close to 100% sure that your question is the exact reason this thread was created.

alpha

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by m R g S r &raquo;</TD></TR><TR><TD CLASS="quote">if leakdown is good, doesn't that mean the valves have to be sealed at the time of testing?

so they are not bent, just opening and closing at the wrong time, aka timing is off....</TD></TR></TABLE>

Bingo

alpha

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrsp33d &raquo;</TD></TR><TR><TD CLASS="quote">Why is the compression so low? My 9:1 block got 170 across the board.</TD></TR></TABLE>

I'm willing to bet the valve lash was completely off.

prelittlelude

doesn't leak down only test ring sealing at the very top or very bottom of the bore, so if your cylinders were ( ) shaped then you could be getting no compression until the top half of the stroke, just throwing some ideas out, also if the timing belt slipped a couple teeth it is quite possible it bent some valves, despite what the engine builder says , you would have to have some awefullly deep valve releifs to make it a none interference
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">

I'm close to 100% sure that your question is the exact reason this thread was created.</TD></TR></TABLE>
LOL!!

FormulaGSR

could the cams be in backwards. intake in exhaust and vise versa? Its late and i'm not thinkin straight so that may ne stupid

Suprdave

Re-Adjust the valves...

gsrboost

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 0x64 &raquo;</TD></TR><TR><TD CLASS="quote">

I'm willing to bet the valve lash was completely off.</TD></TR></TABLE>

Nope it isn't. It's set to spec or atleast was when I did the compression test.

alpha

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrsp33d &raquo;</TD></TR><TR><TD CLASS="quote">

Nope it isn't. It's set to spec or atleast was when I did the compression test.</TD></TR></TABLE>

Wow ... Hmmm ... Let us know what you all find when the motor is apart.

earl

If you really have a 2% leakdown, the problem would have to be in cam phasing/timing or all your cam lobes have gone flat.

Boostfed

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Suprdave &raquo;</TD></TR><TR><TD CLASS="quote">Re-Adjust the valves...</TD></TR></TABLE>

What Dave said. Had a similar problem check my thread when I asked for help before and it helped!

https://honda-tech.com/zerothread?id=901478