C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

what cloyes#do you run?do you like it?

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Old Jul 9, 2007 | 02:38 PM
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Default what cloyes#do you run?do you like it?

ive done the search,but id like to know what you think after youve run it a while.im changing to electric water pump on my lt4 and it seems i have two options,
clo-9-3145,which just needs removal of the reluctor ring and a tune to eliminate the crank sensor,or
clo-9-3151,which appears to simply replace the factory chain.
i like the price of the 3145 and the ring has to be removed anyway so it appears theres no extra work during cam change.
i didnt see any pros or cons in the search.will the ring missing just spit a code for missing,light on,or not start and run until i get it tuned?and what about the crank sensor itself,leave it in or plug the cover hole?im willing to spend extra for the 3151 if need be.thanks.junior
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Old Jul 9, 2007 | 03:01 PM
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I'm running the 9-3145 on my 94

Removing the reluctor ring will throw a code on your 96, but I'm almost certain it will still run. If you plan on getting a tune, you should just go with the cheaper and better, double-roller 9-3145.
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Old Jul 9, 2007 | 04:35 PM
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1996 LT1

I was told I'd have to remove the stock water pump gear setup and run an electric pump if I went with a Cloyes True/double roller set.

So I sold the True roller and bought the Cloyes set that was a direct bolt on.

Jake

Last edited by JAKE; Jul 9, 2007 at 05:02 PM.
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Old Jul 9, 2007 | 04:35 PM
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I used the Cloyes 3145. It worked fine but you need thinner bolts than the stock ones to fit under the timing cover.

Last edited by VR'92; Jul 9, 2007 at 04:37 PM.
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Old Jul 9, 2007 | 05:41 PM
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thanks vr92,thats the first time ive read about using shorter bolts.im guessing you mean the top bolts that retain the cam gear to the camshaft.ill look more deeply into the changeover differences.a mistake there could be catastrophic.thanks again.junior
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Old Jul 9, 2007 | 05:46 PM
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I reused all the stock bolts on my 94.
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Old Jul 9, 2007 | 05:54 PM
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Originally Posted by VR'92
I used the Cloyes 3145. It worked fine but you need thinner bolts than the stock ones to fit under the timing cover.
I don't know about your '92 or a '96 for that matter. But I've had no problems using stock bolts with the 9-3145 Cloyes in my '95, understanding that both use different covers than the '94-'95 cars do. But I'd think that interference would be minimal and that just a bit of grinding done inside the cover as a preemptive measure should take care of it either way.
To the OP, you can either leave your sensor in place as a plug or install a 3/4" core plug for a cleaner look.
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Old Jul 9, 2007 | 06:05 PM
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thanks corvette kid,ive got a big piece of card board for notes.im making a a list and checking it twice.ill decide on the sensor option when i get there.junior
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Old Jul 9, 2007 | 07:22 PM
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Originally Posted by black96lt4c4
thanks corvette kid,ive got a big piece of card board for notes.im making a a list and checking it twice.ill decide on the sensor option when i get there.junior
Your screen name says 96, so be aware we're different from earlier models. Be sure to check into the stock water pump situation.

I bought, not only a timing chain, but timing chain cover only to find out that my 96 is different making those parts un-useable for my purposes.

So I sold the brand new Cloyes True Roller set and still have the timing chain cover laying on my work bench. Be aware, too, that "F" body stuff differs in several ways too.

This stuff can be really confusing; I just don't want you to walk the road I did.

Jake
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Old Jul 9, 2007 | 07:46 PM
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hey jake,
im moved here to louisville from the carrollton-plano,dallas area.i have a 1996 lt4.im gathering information and parts to do a hotcam swap.ive been searching archives so im not surprised by anything during the install.ive already bought an opti and a hd meziere,so now im shopping for hotcam,valvespring set,and the gaskets ill need.ive decided to change over to the cloyes 9-3145 timing chain,so now im considering a spare timing cover i can weld on and store the the origanal stuff.so thats where im at.ill have to look into the timing cover differences you mentioned.i really appreciate all of the answers from the members as im doing the swap myself.junior
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Old Jul 9, 2007 | 08:49 PM
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Originally Posted by black96lt4c4
thanks vr92,thats the first time ive read about using shorter bolts.im guessing you mean the top bolts that retain the cam gear to the camshaft.ill look more deeply into the changeover differences.a mistake there could be catastrophic.thanks again.junior
Yep just those 3 little bolts. Use 3 grade 8 bolts with a thinner head and it's a great double roller for our cars.

I got mine at a speed shop for 2 bucks.

So do and some don't. It might only be a 92 thing but min definitely wouldn't work w/o em.
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Old Jul 9, 2007 | 08:50 PM
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Originally Posted by Corvette Kid
I don't know about your '92 or a '96 for that matter. But I've had no problems using stock bolts with the 9-3145 Cloyes in my '95, understanding that both use different covers than the '94-'95 cars do. But I'd think that interference would be minimal and that just a bit of grinding done inside the cover as a preemptive measure should take care of it either way.
To the OP, you can either leave your sensor in place as a plug or install a 3/4" core plug for a cleaner look.
I may have had something to do with using a 95 Timing cover on a 92 (for the vented opti)

Nathan Plemmons 92 also needed this to be done.
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Old Jul 9, 2007 | 09:03 PM
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Originally Posted by VR'92

So do and some don't. It might only be a 92 thing but min definitely wouldn't work w/o em.
Probably just a slight tolerance overlap in some cases.

Originally Posted by VR'92
I may have had something to do with using a 95 Timing cover on a 92 (for the vented opti)

Nathan Plemmons 92 also needed this to be done.
That shouldn't make any difference as all LTx blocks are the same casting, see above. I certainly wouldn't let this dissuade me from making such important and proven performance/reliability upgrades.
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Old Jul 9, 2007 | 09:17 PM
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regarding the front cover,(vented opti) issue being discussed,im thinking of a spare front cover to weld the waterpump shaft hole.dont care about the crank sensor because of the tune.whats the difference?
will a lt1 or fbody cover work?thanks
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Old Jul 9, 2007 | 09:25 PM
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Get a 95 timing cover, they didn't have the crank sensor.
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Old Jul 9, 2007 | 09:34 PM
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Originally Posted by black96lt4c4
regarding the front cover,(vented opti) issue being discussed,im thinking of a spare front cover to weld the waterpump shaft hole.dont care about the crank sensor because of the tune.whats the difference?
will a lt1 or fbody cover work?thanks
Covers are only specific to a given level of the LTx engines. There are only three. Early opti which is '92-'94 Y-body. '93-'94 F-body and '94 and up only on the full sized cars in which the LT1 was used. For Corvette purposes, '92 and '94 use one cover. The '95 uses another for the later opti base design and drive changes. The '96 LT1 and LT4 is different yet due to the crank sensor. However, it's still set up for the later opti's drive design. This means it's driven from the cam gear pin (the pin's longer than on earlier LTs) instead of the earlier opti drive set-up. This also means that the '95 and '96 timing covers are interchangable as long as the crank sensor is not needed or utilized.

Last edited by Corvette Kid; Jul 9, 2007 at 09:39 PM.
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Old Jul 9, 2007 | 10:09 PM
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thanks guys,
i have many friends who have performance cars,but i may as well be speaking japenese looking for information on my car,not to mention modifacation.ill look into finding a 95 or 96 corvette front cover.if i screw that one up ill say"doh"instead of holy s@#$.it will save time also.
i really appreciate the help.junior.
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To what cloyes#do you run?do you like it?

Old Jul 10, 2007 | 09:08 AM
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Bill,
I have installed the 3145 Roller timing sets on two different 95 stroker builds and found contact problems with the two torx head screws on the cam plate behind the cam gear hitting the rough casted area of the gear. I had to grind about a 1/32 or so off the heads to clear the gear. Not to much though that you lose torx bit engagement and torque capability on the screws. Also close gear contact is possible on the inside face of the cover with the 3145 cam gear possibly requiring grinding of the aluminum face in way of the gear rotation. I usually mock up the cam with cam gear, plate,no chain or lifters, and cover with no gasket to check for any actual contact by rotating cam gear so i know exactly how much clearance I have or need prior to installing the gasket. I also most times end up running either .005" or .010" under 3145 timing sets from Cloyes when block mains have been line bored/honed to improve and reduce chain slack. Each set up is obviously different. Just food for thought.
Rick
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Old Jul 10, 2007 | 10:07 AM
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Originally Posted by STL94LT1
Get a 95 timing cover, they didn't have the crank sensor.
Correct! All you need then is JB weld and a Quarter!

What I used.
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Old Jul 10, 2007 | 10:09 AM
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Originally Posted by Corvette Kid
Probably just a slight tolerance overlap in some cases.


That shouldn't make any difference as all LTx blocks are the same casting, see above. I certainly wouldn't let this dissuade me from making such important and proven performance/reliability upgrades.
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