questions on my 93 lt1
Thread Starter
Instructor
Joined: Sep 2014
Posts: 103
Likes: 0
questions on my 93 lt1
I have some oil leaks in my car and decided to do some improvements while the engine was apart: timing cover leaking so I ordered water pump, optispark with cap and rotor, and comp cams double roller billet timing chain kit.
Oil pan leaking so I ordered melling high volume oil pump and new screen.
Valve covers leaking so I am thinking about upgrading valve springs and rockers and replacing valve seals also.
Here is the dilemma, from what I have read the timing chain might not work as a stock replacement, is this true?
If I get rockers should I get 1.5's or 1.6's? If I am reusing my stock camshaft.
Better to use stock lt4 springs or something else?
Oil pan leaking so I ordered melling high volume oil pump and new screen.
Valve covers leaking so I am thinking about upgrading valve springs and rockers and replacing valve seals also.
Here is the dilemma, from what I have read the timing chain might not work as a stock replacement, is this true?
If I get rockers should I get 1.5's or 1.6's? If I am reusing my stock camshaft.
Better to use stock lt4 springs or something else?
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 204
I have some oil leaks in my car and decided to do some improvements while the engine was apart: timing cover leaking so I ordered water pump, optispark with cap and rotor, and comp cams double roller billet timing chain kit.
Oil pan leaking so I ordered melling high volume oil pump and new screen.
Valve covers leaking so I am thinking about upgrading valve springs and rockers and replacing valve seals also.
Here is the dilemma, from what I have read the timing chain might not work as a stock replacement, is this true?
If I get rockers should I get 1.5's or 1.6's? If I am reusing my stock camshaft.
Better to use stock lt4 springs or something else?
Oil pan leaking so I ordered melling high volume oil pump and new screen.
Valve covers leaking so I am thinking about upgrading valve springs and rockers and replacing valve seals also.
Here is the dilemma, from what I have read the timing chain might not work as a stock replacement, is this true?
If I get rockers should I get 1.5's or 1.6's? If I am reusing my stock camshaft.
Better to use stock lt4 springs or something else?
Due to the OE gear drives your opti. As well as teeth to drive your water pump. You would need to eliminate the opti and use a electric water pump.
Clearance your timing cover and plug the holes for the water pump & opti.. 1.6RR on a stock cam gains very close to .030 lift. It makes a slight performance gain. LT4 behives will reduce some valvetrain weight. No worries here!! on high lift quick ramp grinds. Behives lack seat pressure & can create a very noisy valvetrain.
Last edited by THE 383 admiral; Nov 27, 2014 at 01:50 AM.
Racer
Joined: Jul 2011
Posts: 387
Likes: 2
From: Austin TX
heres a few options you have related to the timing chain and valve springs.
If you buy a electric water pump, the ZZ4 timing set is more then strong enough single roller chain, but you honestly dont need anything more then stock with the stock cam. I would replace with a new timing chain and not think twice about it. You will not be able to run, nor do you need to run a double roller timing chain for a near stock application.
if you buy some 1.6 roller rockers, go ahead and upgrade your valve springs to either the LT4 or Alex's parts set of single valve springs, Otherwise stock ones will be fine.
If you buy a electric water pump, the ZZ4 timing set is more then strong enough single roller chain, but you honestly dont need anything more then stock with the stock cam. I would replace with a new timing chain and not think twice about it. You will not be able to run, nor do you need to run a double roller timing chain for a near stock application.
if you buy some 1.6 roller rockers, go ahead and upgrade your valve springs to either the LT4 or Alex's parts set of single valve springs, Otherwise stock ones will be fine.
Burning Brakes
Joined: Apr 2009
Posts: 1,228
Likes: 10
From: That one city...you know that one. Idaho
From what the research I did when looking at using a double roller timing chain on my LT1. I found that opti should still work fine, but the factory water pump cant work. The water pump need to converted to an electric pump.
Do you already the timing chain?
Do you already the timing chain?
Burning Brakes
Joined: Apr 2009
Posts: 1,228
Likes: 10
From: That one city...you know that one. Idaho
Thanks for clearing that up. It does not surprise me I had part of it wrong. I don't remember when I looked into it, but it was probably for the 97 Camaro I used to have.
Thread Starter
Instructor
Joined: Sep 2014
Posts: 103
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Yeah I called my local speedshop (who is normally knowledgeable)they suggested the chain I got, guess I need to go back make an exchange. Just wanted something of good quality.
Thread Starter
Instructor
Joined: Sep 2014
Posts: 103
Likes: 0
You will not be able to use a double roller on a LT1
Due to the OE gear drives your opti. As well as teeth to drive your water pump. You would need to eliminate the opti and use a electric water pump.
Clearance your timing cover and plug the holes for the water pump & opti.. 1.6RR on a stock cam gains very close to .030 lift. It makes a slight performance gain. LT4 behives will reduce some valvetrain weight. No worries here!! on high lift quick ramp grinds. Behives lack seat pressure & can create a very noisy valvetrain.
Due to the OE gear drives your opti. As well as teeth to drive your water pump. You would need to eliminate the opti and use a electric water pump.
Clearance your timing cover and plug the holes for the water pump & opti.. 1.6RR on a stock cam gains very close to .030 lift. It makes a slight performance gain. LT4 behives will reduce some valvetrain weight. No worries here!! on high lift quick ramp grinds. Behives lack seat pressure & can create a very noisy valvetrain.
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Burning Brakes
Joined: Apr 2009
Posts: 1,228
Likes: 10
From: That one city...you know that one. Idaho
Thread Starter
Instructor
Joined: Sep 2014
Posts: 103
Likes: 0
I meant Alex's valves won't work. I've seen some comp cams complete kits that include camshaft, chain, springs, and lifters for around $300 stay away or are they ok for what I am looking to do?
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 204
You get purchase good quality 1.6RR and adjust the lash 1/2 - 3/4
Past 0 you will be fine!! The OE spings will handle this with ease.
Safety Car
Joined: Jun 2003
Posts: 4,250
Likes: 656
From: San Diego Ca
It isn't a SBC unless it leaks.
Having said that, everything should work just fine but the chain. Cloyes did make an LT1 chain years ago (I built my 383s for my 93s in 95 and in 96). It was not double roller but had stronger gears with slightly deeper teeth. But it was hella expensive.
Here is a thread for people that are running the 3145 double chain you likely have.
http://ls1tech.com/forums/lt1-lt4-mo...g-set-lt1.html
Having said that, everything should work just fine but the chain. Cloyes did make an LT1 chain years ago (I built my 383s for my 93s in 95 and in 96). It was not double roller but had stronger gears with slightly deeper teeth. But it was hella expensive.
Here is a thread for people that are running the 3145 double chain you likely have.
http://ls1tech.com/forums/lt1-lt4-mo...g-set-lt1.html
Thread Starter
Instructor
Joined: Sep 2014
Posts: 103
Likes: 0
It isn't a SBC unless it leaks.
Having said that, everything should work just fine but the chain. Cloyes did make an LT1 chain years ago (I built my 383s for my 93s in 95 and in 96). It was not double roller but had stronger gears with slightly deeper teeth. But it was hella expensive.
Here is a thread for people that are running the 3145 double chain you likely have.
http://ls1tech.com/forums/lt1-lt4-mo...g-set-lt1.html
Having said that, everything should work just fine but the chain. Cloyes did make an LT1 chain years ago (I built my 383s for my 93s in 95 and in 96). It was not double roller but had stronger gears with slightly deeper teeth. But it was hella expensive.
Here is a thread for people that are running the 3145 double chain you likely have.
http://ls1tech.com/forums/lt1-lt4-mo...g-set-lt1.html
Racer
Joined: Jul 2011
Posts: 387
Likes: 2
From: Austin TX
I got a used LT4 hot cam for $90 with springs and reused my stock lifters, cheap option for some extra horse power if you are already tearing it down to the timing chain, not much more work to stab a cam.
Thread Starter
Instructor
Joined: Sep 2014
Posts: 103
Likes: 0
I keep toying with the idea to install a lt4 hot cam kit while my engine is apart. The kit seems pretty complete for $588 but does not include lifters or pushrods. What kind of power would this bump the car up to? I already have all the usual upgrades intake, exhaust, high flow cats, hypertech prom chip, etc.....