Slant Six Forum :: no power

: Should the timing marks line up with 0 on the
: timing chain cover when the timing marks on
: the cam gears are lined up? My mark lines up
: with a round tube on the cover don,t know what it is for.

: This "tube" is for the factory
: service "probe" mount point. I
: would suggest using the earler style cover
: with the conventional "tab"
: markings.
:
: As for your new engine set-up not making good
: power, get us a little more info. like the
: cam's profile info. (especially the overlap
: "number")
:
: There is an important relationship between the
: cam and the stactic compression ratio. This
: is why you see most performance cams
: combined with increased stactic compression,
: the bigger cam "uses-up" some of
: the new compression.
:
: As noted by others, check the cam's installed
: position and also check the current cranking
: compression with a guage. (cranking
: compression will tend to increase as you
: advance the cam timing) This added info.
: will shed some light on your lack of
: "pep".
:
: Here is a link to one of Lou's posts on this
: subject: DD

: The cam is a Comcams: Grind Number: CR6 264S-10
: Serial Number: MB3387
:
: Intake Exhaust
: Valve Adjustment .010 .012
: Gross Valve Lift .440 .440
: Duration AT
: .020 Tappet Lift 264 264
: Valve Timing open close
: at .020 INT 24 BTDC 60 ABDC
:
: EXH 60 BBDC 24 ATDC
:
: These specs. are for cam installed at 106
: intake center line.
:
: Intake Exhaust
: Duration at .50 220 220
: Lobe Lift .2933 .2933
: Lobe Separation 110

: i also used that cam in my first slant rebuild
: and was very unhappy with it. it comes on
: about 2200 and went flat around 42-4400.
: pitiful powerband to say the least. i tried
: it in another motor after that one with ill
: results again. i can not say enough good
: things about the 264 isky grind i ran for a
: while, or the reed cam i have now......chad

: I have a Comp cam in my 225 and it runs fine;
: lift .440 for both intake and exhaust
: 4.0 degree overlap
: 108 degree lobe center
: IO 2 BTDC IC 38 ABDC
:
: EVO 38 BBDC EVC 2 ATDC
:
: Intake .010 hot
: Exhaust .012 hot

: needless to say, cams are quite application
: specific.

Author:	no power [ Sun Sep 30, 2001 6:16 pm ]
Post subject:	no power
shold the timing marks line up with 0 on the timing chain cover when the timing marks on the cam gears are lined up mine line up with a round tube on the cover don,t know what it is for tryed another cover and dampner was the same thanks for any help brentmcl@home.com

Author:	Doc [ Mon Oct 01, 2001 9:25 am ]
Post subject:	Re: No "New" Power ?
Quote: : Should the timing marks line up with 0 on the : timing chain cover when the timing marks on : the cam gears are lined up? My mark lines up : with a round tube on the cover don,t know what it is for. This "tube" is for the factory service "probe" mount point. I would suggest using the earler style cover with the conventional "tab" markings. As for your new engine set-up not making good power, get us a little more info. like the cam's profile info. (especially the overlap "number") There is an important relationship between the cam and the stactic compression ratio. This is why you see most performance cams combined with increased stactic compression, the bigger cam "uses-up" some of the new compression. As noted by others, check the cam's installed position and also check the current cranking compression with a guage. (cranking compression will tend to increase as you advance the cam timing) This added info. will shed some light on your lack of "pep". Here is a link to one of Lou's posts on this subject: DD Cams vs Compression

Author:	brent [ Mon Oct 01, 2001 6:06 pm ]
Post subject:	Re: No "New" Power ?
Quote: : This "tube" is for the factory : service "probe" mount point. I : would suggest using the earler style cover : with the conventional "tab" : markings. : : As for your new engine set-up not making good : power, get us a little more info. like the : cam's profile info. (especially the overlap : "number") : : There is an important relationship between the : cam and the stactic compression ratio. This : is why you see most performance cams : combined with increased stactic compression, : the bigger cam "uses-up" some of : the new compression. : : As noted by others, check the cam's installed : position and also check the current cranking : compression with a guage. (cranking : compression will tend to increase as you : advance the cam timing) This added info. : will shed some light on your lack of : "pep". : : Here is a link to one of Lou's posts on this : subject: DD The cam is a Comcams: Grind Number: CR6 264S-10 Serial Number: MB3387 Intake Exhaust Valve Adjustment .010 .012 Gross Valve Lift .440 .440 Duration AT .020 Tappet Lift 264 264 Valve Timing open close at .020 INT 24 BTDC 60 ABDC EXH 60 BBDC 24 ATDC These specs. are for cam installed at 106 intake center line. Intake Exhaust Duration at .50 220 220 Lobe Lift .2933 .2933 Lobe Separation 110 brentmcl@home.com

Author:	Chad [ Mon Oct 01, 2001 7:56 pm ]
Post subject:	Re: No "New" Power ?
Quote: : The cam is a Comcams: Grind Number: CR6 264S-10 : Serial Number: MB3387 : : Intake Exhaust : Valve Adjustment .010 .012 : Gross Valve Lift .440 .440 : Duration AT : .020 Tappet Lift 264 264 : Valve Timing open close : at .020 INT 24 BTDC 60 ABDC : : EXH 60 BBDC 24 ATDC : : These specs. are for cam installed at 106 : intake center line. : : Intake Exhaust : Duration at .50 220 220 : Lobe Lift .2933 .2933 : Lobe Separation 110 i also used that cam in my first slant rebuild and was very unhappy with it. it comes on about 2200 and went flat around 42-4400. pitiful powerband to say the least. i tried it in another motor after that one with ill results again. i can not say enough good things about the 264 isky grind i ran for a while, or the reed cam i have now......chad beardliz@msn.com

Author:	Fopar [ Mon Oct 01, 2001 8:21 pm ]
Post subject:	Re: No "New" Power ?
Quote: : i also used that cam in my first slant rebuild : and was very unhappy with it. it comes on : about 2200 and went flat around 42-4400. : pitiful powerband to say the least. i tried : it in another motor after that one with ill : results again. i can not say enough good : things about the 264 isky grind i ran for a : while, or the reed cam i have now......chad I have a Comp cam in my 225 and it runs fine; lift .440 for both intake and exhaust 4.0 degree overlap 108 degree lobe center IO 2 BTDC IC 38 ABDC EVO 38 BBDC EVC 2 ATDC Intake .010 hot Exhaust .012 hot dbjerklund@hotmail.com

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Author:	Chad [ Tue Oct 02, 2001 2:40 am ]
Post subject:	Re: No "New" Power ?
Quote: : I have a Comp cam in my 225 and it runs fine; : lift .440 for both intake and exhaust : 4.0 degree overlap : 108 degree lobe center : IO 2 BTDC IC 38 ABDC : : EVO 38 BBDC EVC 2 ATDC : : Intake .010 hot : Exhaust .012 hot needless to say, cams are quite application specific. beardliz@msn.com

Author:	Dart270 [ Tue Oct 02, 2001 8:52 am ]
Post subject:	Re: No "New" Power ?
Quote: : needless to say, cams are quite application : specific. Just so y'all know, that cam is very close to stock. Lou madsenl@caltech.edu

Author:	Doc [ Tue Oct 02, 2001 9:47 am ]
Post subject:	Re: Cam Selection, It Is Tricky
Quote: : I have a Comp cam in my 225 and it runs fine; : lift .440 for both intake and exhaust : 4.0 degree overlap : 108 degree lobe center : IO 2 BTDC IC 38 ABDC : : EVO 38 BBDC EVC 2 ATDC : : Intake .010 hot : Exhaust .012 hot One tip on these Comp cams, I tend to run them a little looser on the exhaust "lash" and get better results, try .014 to .016 "lash" to see if it runs better. I have to say that the internet is speeding-up our understanding about the available SL6 cams and what seems to work best. My "vision" is to someday have enough info. and test data where we can have some great working part combos for others to follow. The "Frog" and "Bow-tie Boys" have had these types of "recipes" for years. (Mopar V8's have them also) Basically a set compression ratio (pistons), cam (on an established installed centerline), intake, carb. and headers. (Head porting and valve size would also be a big factor for our SL6) We are seeing a number of people "closing-in" on good part combos so please keep the information flowing. DD

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