New timing chain with cam upgrade?
02-04-2004, 11:24 AM
#16
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Join Date: Jan 2004
Location: OKC, Oklahoma
Posts: 91
Alright I just got my kit. Reading the install instructions it says that a Heavy Duty Timing Chain Set is mandatory for engine operation above 5500 rpm. I don't think I'll be above that. What is the stock fuel cut off/rev limit on an LT1?
02-04-2004, 03:06 PM
#19
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Join Date: Aug 1998
Location: houston, tx
Posts: 823
Originally posted by Newbie97
You dont want to do that. For the cost of a new opti and the ex duty chain. Just get a cloyes double roller and a csi pump and you want have to change the opti. and you will probably save $100 or so and free some hp up with the electic h2o pump.
You dont want to do that. For the cost of a new opti and the ex duty chain. Just get a cloyes double roller and a csi pump and you want have to change the opti. and you will probably save $100 or so and free some hp up with the electic h2o pump.
NO, NO, NO....
To run a double roller in the 93s and 94s you must do the opti converstion.
Same goes with the LT4 and ED chain sets.
None of these sets have a cam gear that's keyed for the shaft that drives the non-vented opti. (Well, I imagine you could find a machine shop to modify the cam gear to possiblly work, but I'm sure it would cost more than doing the vented opti conversion.)
Unless you're willing to do the vented opti conversion on the 93s and 94's, the only options are the stock replacement set and the Lunati set. And the Jury is still out on whether the Lunati set is any better (or actually worse) than the stock set...
02-04-2004, 03:10 PM
#20
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Join Date: Mar 2000
Location: Point Pleasant, NJ... USA
Posts: 1,955
I say[again
]:
To use a LT4HD [or a Cloyes etc double roller]
You have to change cam, opti, timing cover, and opti harness to 95 style..
Also add vacuum lines for opti..
[This is so whether you use a electric water pump or NOT]
The reason for this is that the early opti's drive with a splined hole in the cam gear... and noone MAKES an aftermarket that drives opti that way..[except Lunati see below]
You cannot run a Cloyes double roller with a 94 opti...period...
There IS a Lunati set that will work with a 93-4 opti, but it has had very bad 'reviews' I wouldn't use one..
]:To use a LT4HD [or a Cloyes etc double roller]
You have to change cam, opti, timing cover, and opti harness to 95 style..
Also add vacuum lines for opti..
[This is so whether you use a electric water pump or NOT]
The reason for this is that the early opti's drive with a splined hole in the cam gear... and noone MAKES an aftermarket that drives opti that way..[except Lunati see below]
You cannot run a Cloyes double roller with a 94 opti...period...
There IS a Lunati set that will work with a 93-4 opti, but it has had very bad 'reviews' I wouldn't use one..
02-04-2004, 04:23 PM
#22
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Join Date: Dec 1969
Location: Little Rock, AR
Posts: 27,710
Originally posted by CMGETSM
Will this really work? Do you know of anyone who has done this? What other parts are needed, and where to get them?
thanks.
Will this really work? Do you know of anyone who has done this? What other parts are needed, and where to get them?
thanks.
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