Something weird with LT1 double roller timing chain conversion
Le Mans Master
Joined: Apr 2000
Posts: 5,713
Likes: 105
From: Manassas VA
I found my box and that is the part no. I am using. I put mine in about a year and a half ago. Maybe they have redesigned the part, but it fit mine ok. At least I didnt notice any clearance problems.
Thread Starter
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by Corvette Kid NC
I've been running the Cloyes 9-3145 set for about 12K miles now with no problems. I'm wondering, do you have the end play on the cam set to spec? The manual gives a spec but is not real clear on all the details if I remember right. Anyway, I set it when installing the rear cam plug. Even if you haven't disturbed it, it may be off enough that it worked with a stock set but won't work with this one.
Racer
Joined: Oct 2003
Posts: 429
Likes: 0
From: Plains Ga.
Bolt interference?
Try this. Remove the cam retaining plate and counter sink the bolt hole to fit a "flat head socket screw". This should give you the clearance you need and then some. If you have any questions about this, email me.
Thanks, JTHVETTE
Thanks, JTHVETTE
Pro
Joined: Jan 2004
Posts: 707
Likes: 0
From: Syracuse Utah
I have an LT4 hot cam and Cloyes double roller just sitting here waiting to be put into my 94. Two questions:
(1) Does the 3157 have the splines cut in the center hole to run the older style opti?
(2) I noticed the new hot cam does not have a stepped nose on the timing chain end. The papers that came with it indicate the cam will fit 84-96 engines. I haven't opened the engine yet to see the old cam, but should the new cam have a stepped nose or the older style non-stepped nose?
(1) Does the 3157 have the splines cut in the center hole to run the older style opti?
(2) I noticed the new hot cam does not have a stepped nose on the timing chain end. The papers that came with it indicate the cam will fit 84-96 engines. I haven't opened the engine yet to see the old cam, but should the new cam have a stepped nose or the older style non-stepped nose?
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Originally Posted by Hotred94
(1) Does the 3157 have the splines cut in the center hole to run the older style opti?
?
?
Team Owner
Joined: Sep 2003
Posts: 25,295
Likes: 4
From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Originally Posted by comp94
VictorRussell
Are you planning on doing a cam/95 opti/timingchain cover swap when you put in the coyles timing chain?
Are you planning on doing a cam/95 opti/timingchain cover swap when you put in the coyles timing chain?
Currently In the process of all of that bud.
Thread Starter
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by Hotred94
(2) I noticed the new hot cam does not have a stepped nose on the timing chain end. The papers that came with it indicate the cam will fit 84-96 engines. I haven't opened the engine yet to see the old cam, but should the new cam have a stepped nose or the older style non-stepped nose?
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Team Owner
Joined: Sep 2003
Posts: 25,295
Likes: 4
From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Originally Posted by JTHVETTE
Try this. Remove the cam retaining plate and counter sink the bolt hole to fit a "flat head socket screw". This should give you the clearance you need and then some. If you have any questions about this, email me.
Thanks, JTHVETTE
Thanks, JTHVETTE
Team Owner
Joined: Sep 2003
Posts: 25,295
Likes: 4
From: I'm the walkin dude I can see all of the world...
St. Jude Donor '03
Originally Posted by Corvette Kid NC
I've been running the Cloyes 9-3145 set for about 12K miles now with no problems. I'm wondering, do you have the end play on the cam set to spec? The manual gives a spec but is not real clear on all the details if I remember right. Anyway, I set it when installing the rear cam plug. Even if you haven't disturbed it, it may be off enough that it worked with a stock set but won't work with this one.
Instructor
Joined: Jun 2001
Posts: 132
Likes: 0
From: Monroe Washington..the State
TJ. I have had good luck with the following double chain sets.
Edelbrock timing sets
Comp Cams timing sets
Roller Master Timing Sets
I recently bought a Cloyes Heavy duty singal set for one of the projects cars but have not tryied it yet.
I need to get Your number BTW. Shoot me a line at
speed secrets@comcast.net
later man!
Edelbrock timing sets
Comp Cams timing sets
Roller Master Timing Sets
I recently bought a Cloyes Heavy duty singal set for one of the projects cars but have not tryied it yet.
I need to get Your number BTW. Shoot me a line at
speed secrets@comcast.net
later man!
Pro
Joined: Jan 2004
Posts: 707
Likes: 0
From: Syracuse Utah
Oh gees... I'm just having one of those days! I'm really embarrised, I was looking at the back end of the cam? 
It does have the step nose, I just pulled one end out of the box and got looking at it.
As for the 3157 with no splines, my machinist buddy thinks he can make an adapter to work with the 3145. I'll have to talk with him once I get the engine open and see what's what.
It does have the step nose, I just pulled one end out of the box and got looking at it.As for the 3157 with no splines, my machinist buddy thinks he can make an adapter to work with the 3145. I'll have to talk with him once I get the engine open and see what's what.
Race Director
Joined: Jan 2002
Posts: 12,263
Likes: 86
From: O'Fallon Missouri
Originally Posted by Hotred94
As for the 3157 with no splines, my machinist buddy thinks he can make an adapter to work with the 3145. I'll have to talk with him once I get the engine open and see what's what.
You'll also need an electric water pump to use that timing set.
Thread Starter
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Originally Posted by STL94LT1
Hmmmm, don't think I would want to try that. But, good luck.
You'll also need an electric water pump to use that timing set.
You'll also need an electric water pump to use that timing set.
I doubt that your machine shop can properly index the opti in relation with the cam. Its a small shaft to begin with, and by the time he is through trying it, you have spent more in labor cost than the cost of a conversion to the later opti. The late opti or rather the vented style are around $230 from Sam Taylor Chevrolet. Couple that with a used 95 timing cover for about $40 or less and you have a complete system. Its not worth the trouble or headaches.
Pro
Joined: Jan 2004
Posts: 707
Likes: 0
From: Syracuse Utah
You're probably right about indexing the shaft. I saw the lunati timing set in the summit catalog but it shows a price of $175. Maybe they dropped the price. In any case, I should give a lot of thought to a new style conversion.
Thanks
Thanks
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by VictorRussell'92
Gosh I hope thats not what wrong. I don't know anything about all that. Probably have to have the motor out to work on that right?
Pro
Joined: Aug 2004
Posts: 544
Likes: 0
Originally Posted by Hotred94
You're probably right about indexing the shaft. I saw the lunati timing set in the summit catalog but it shows a price of $175. Maybe they dropped the price. In any case, I should give a lot of thought to a new style conversion.
Thanks
Thanks