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Hi Mathieu,
Haven=E2=80=99t heard of that myself, but you didn=E2=80=99t mention the co=
ndition of the timing chain tensioner. =C2=A0 Was it new recently? =C2=A0 P=
erhaps the spring is too relaxed to keep proper tension on the chain. =C2=
=A0 Also look at the timing cover where the tensioner rides. =C2=A0 Has it =
worn a big groove into the timing cover? =C2=A0Maybe it=E2=80=99s getting h=
eld up. =C2=A0 Compare it with a new tensioner spring, and see if the arc i=
s relaxed a bit.
That=E2=80=99s what I=E2=80=99d check first, but maybe you=E2=80=99ve done =
that. =C2=A0 =C2=A0Is it a stock cam wheel, or is it an adjustable one? =C2=
=A0I=E2=80=99m assuming stock...
Hope that helps!Dave Gott
Sent from Yahoo Mail for iPhone
On Sunday, November 24, 2019, 10:38 PM, Mathieu W. Huovinen via Fot <fot@au=
tox.team.net> wrote:
Fellas,
Sounds like we have the bearing cap strap issue resolved...who is up for an=
other mystery? Has anyone ever has their timing chain skip a tooth??
Final race on Saturday at the Turlkey Bowl this weekend at Summit Point. Tr=
iumph Spitfire..1296 engine. Double roller chain set. Car was running well =
all weekend, was out twice earlier that day. We leave false grid for the to=
set up for the first lap and I begin to accelerate. All of a sudden the ca=
r just dies and I coast off the track even before turn one. On the side of =
the track I couldn't start the car. In my mind I'm thinking my perrtonix di=
stributor just took a shit. Got towed in and all I'm thinking in pertronix.=
I swap in a points distributor and nothing. Perhaps my coil? Swap in a new=
coil. Nothing. Plugs perhaps? Swap in a good set of NGKs. Nothing. Not eve=
n a cough out of the engine. By this time I had run down the battery from t=
rying to start it so much. At this point I was jumping the racecar battery =
from my Tundra truck battery thinking perhaps a weak spark from a shot batt=
ery. Nothing. Was getting plenty of fuel because the plugs were wet. I even=
pulled and cleaned all the jets out of the Weber 45 DCOE just to make sure=
I was getting correct fuel. Fuel. Air. Spark. COMPRESSION. This next day (=
this morning) I did a compression test at the track. 80/70/70/70. What the =
heck? Thats not a blown head gasket..the cam HAS to be out of timing. I spe=
nt the majority of the 5 hour drive home trying to figure it out. Got home,=
car off trailer, straight to work. Pulled radiator, pulley, timing chain c=
over. No damage. Find TDC and put on my degree wheel. Pulled rockers and se=
t dial indicator on #1 intake. Tuned engine over to where cam sheet says wh=
ere #1 centerline is- 104 degrees after TDC while watching dial indicator. =
Went past 104 and dial was still climbing. Made it to to about 150ish degre=
es past TDC til indicator started to drop back down so I know I had went ri=
ght past the peak of the lobe. Pulled chain off carefully and rotated camsh=
aft until I found peak of lobe and moved crank back to 104 and set the chai=
n back on...about one tooth =C2=A0Put rockers back on and checked compressi=
on on #1. 160 PSI. That's as far as I got before my wife came down to yell =
art me. It was already 2130 at this point. More tomorrow as I put it back t=
ogether.=C2=A0
Thoughts? Ideas? Can the timing chain "float" at high revs? Thank-you in ad=
vance for any input!
V/r,
Mathieu Huovinen_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
hoo.com
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ft-com:vml" xmlns:o=3D"urn:schemas-microsoft-com:office:office"><head><!--[=
if gte mso 9]><xml><o:OfficeDocumentSettings><o:AllowPNG/><o:PixelsPerInch>=
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dy>
Hi Mathieu,<div><br></div><div>Haven=E2=80=99t heard of that myself, but yo=
u didn=E2=80=99t mention the condition of the timing chain tensioner.  =
; Was it new recently? Perhaps the spring is too relaxed to keep pro=
per tension on the chain. Also look at the timing cover where the te=
nsioner rides. Has it worn a big groove into the timing cover?  =
;Maybe it=E2=80=99s getting held up. Compare it with a new tensioner=
spring, and see if the arc is relaxed a bit.</div><div><br></div><div>That=
=E2=80=99s what I=E2=80=99d check first, but maybe you=E2=80=99ve done that=
. Is it a stock cam wheel, or is it an adjustable one? I=
=E2=80=99m assuming stock...</div><div><br></div><div>Hope that helps!</div=
><div>Dave Gott<br><br><br><a href=3D"https://overview.mail.yahoo.com/?.src=
=3DiOS">Sent from Yahoo Mail for iPhone</a><br><br><p class=3D"yahoo-quoted=
-begin" style=3D"font-size: 15px; color: #715FFA; padding-top: 15px; margin=
-top: 0">On Sunday, November 24, 2019, 10:38 PM, Mathieu W. Huovinen via Fo=
t <fot@autox.team.net> wrote:</p><blockquote class=3D"iosymail"><div =
id=3D"yiv4862578555">
<div style=3D"color:black;font:10pt arial;">Fellas,
<div><br>
</div>
<div>Sounds like we have the bearing cap strap issue resolved...who is up f=
or another mystery? Has anyone ever has their timing chain skip a tooth??</=
div>
<div><br>
</div>
<div>Final race on Saturday at the Turlkey Bowl this weekend at Summit Poin=
t. Triumph Spitfire..1296 engine. Double roller chain set. Car was running =
well all weekend, was out twice earlier that day. We leave false grid for t=
he to set up for the first lap and I begin to accelerate. All of a sudden t=
he car just dies and I coast off the track even before turn one. On the sid=
e of the track I couldn't start the car. In my mind I'm thinking my perrton=
ix distributor just took a shit. Got towed in and all I'm thinking in pertr=
onix. I swap in a points distributor and nothing. Perhaps my coil? Swap in =
a new coil. Nothing. Plugs perhaps? Swap in a good set of NGKs. Nothing. No=
t even a cough out of the engine. By this time I had run down the battery f=
rom trying to start it so much. At this point I was jumping the racecar bat=
tery from my Tundra truck battery thinking perhaps a weak spark from a shot=
battery. Nothing. Was getting plenty of fuel because the plugs were wet. I=
even pulled and cleaned all the jets out of the Weber 45 DCOE just to make=
sure I was getting correct fuel. Fuel. Air. Spark. COMPRESSION. This next =
day (this morning) I did a compression test at the track. <a dir=3D"ltr" hr=
ef=3D"tel:80/70/70/70" x-apple-data-detectors=3D"true" x-apple-data-detecto=
rs-type=3D"telephone" x-apple-data-detectors-result=3D"1">80/70/70/70</a>. =
What the heck? Thats not a blown head gasket..the cam HAS to be out of timi=
ng. I spent the majority of the 5 hour drive home trying to figure it out. =
Got home, car off trailer, straight to work. Pulled radiator, pulley, timin=
g chain cover. No damage. Find TDC and put on my degree wheel. Pulled rocke=
rs and set dial indicator on #1 intake. Tuned engine over to where cam shee=
t says where #1 centerline is- 104 degrees after TDC while watching dial in=
dicator. Went past 104 and dial was still climbing. Made it to to about 150=
ish degrees past TDC til indicator started to drop back down so I know I ha=
d went right past the peak of the lobe. Pulled chain off carefully and rota=
ted camshaft until I found peak of lobe and moved crank back to 104 and set=
the chain back on...about one tooth Put rockers back on and checked =
compression on #1. 160 PSI. That's as far as I got before my wife came down=
to yell art me. It was already 2130 at this point. More tomorrow as I put =
it back together. </div>
<div><br>
</div>
<div>Thoughts? Ideas? Can the timing chain "float" at high revs? Thank-you =
in advance for any input!</div>
<div><br>
</div>
<div>V/r,</div>
<div><br>
</div>
<div>Mathieu Huovinen</div>
</div></div>_______________________________________________<br><a ymailto=
=3D"mailto:fot@autox.team.net"; href=3D"mailto:fot@autox.team.net";>fot@autox=
.team.net</a><br><br><a href=3D"http://www.fot-racing.com"; target=3D"_blank=
">http://www.fot-racing.com</a><br><br>Donate: <a href=3D"http://www.team.n=
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hoo.com</a><br><br><br><blockquote></blockquote></blockquote></div>
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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