Difference between (junk)stock chain....
Thread Starter
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
Difference between (junk)stock chain....
Hear are 2 pictures I took of my stock LT4 chain and the new extreem duty GM LT4 chain. For those who don't want to spent the 200 for the beefier chain set is nuts!!! The stock chain is tiny and mine was pretty loose with only 32000 on it. I think youcan tell which is which :eek:
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Re: Difference between (junk)stock chain.... (RichS)
lemme guess... less than $100.00 seperates the 2... right??? no brainer... does that fit on the LT1, or will it require changing over to the LT4 front cover?
Thread Starter
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
Re: Difference between (bogus)
It fits the 95-96 LT1/LT4. other years you have to convert to the newer front cover and opti. I don't remember my 95 chain being so small when I did the cam and put this chainset in it? But man this looks so cheap and tiny. I almost cringe when I think about taking it to 6700 a few times :rolleyes:
[Modified by RichS, 7:53 PM 12/4/2001]
[Modified by RichS, 7:53 PM 12/4/2001]
Thread Starter
Le Mans Master
Joined: Aug 1999
Posts: 7,339
Likes: 137
From: WilkesBarre PA
Re: Difference between (ericcer)
Extreeme duty set is $226 from GM. No Idea how much the stock setup is. This includes the chain, upper and lower gear, and a new waterpump drive shaft gear. Well worth the money over stock! That is unless you go with a electric water pump then you could use a regular double roller setup but I stayed with the stock waterpump.
[Modified by RichS, 8:13 PM 12/4/2001]
[Modified by RichS, 8:13 PM 12/4/2001]
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: Difference between (RichS)
Wow,
That is quite a bit of difference. Tonight I took my timing cover off for my project and the timing chain on the l98 is quite a bit like the larger of the two you show. My little girls bike has a larger chain than your original. I have to totally agree with you on the upgrade. It too makes me cringe. How much "slop" is normal on these timing chains? Mine too seemed quite stretched. But I do not know what a new one is like so maybe the play I feel is normal. Perhaps someone can give me an idea. Good suggestion though.
That is quite a bit of difference. Tonight I took my timing cover off for my project and the timing chain on the l98 is quite a bit like the larger of the two you show. My little girls bike has a larger chain than your original. I have to totally agree with you on the upgrade. It too makes me cringe. How much "slop" is normal on these timing chains? Mine too seemed quite stretched. But I do not know what a new one is like so maybe the play I feel is normal. Perhaps someone can give me an idea. Good suggestion though.
Safety Car
Joined: Mar 2000
Posts: 3,620
Likes: 2
From: Hillsboro OR
Re: Difference between (junk)stock chain.... (RichS)
The stock LT4 chain and sprockets is around 200 bucks. There's nothing wrong with the stock LT4 chain as long as the valve train doesn't get springs that are much stiffer than stock.
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Advanced
Joined: Oct 2001
Posts: 71
Likes: 0
From: Fairbanks AK
Think about it....
GM engineered the LT4 to be a mild "performance" engine right? When you start talking true performace the term "heavy duty" does not apply. Examine the base adjective--heavy. Heavy does not equate to quickness. Hence the lightweight valvetrain components. Not only do you save weight, the weight is rotating mass which affects engine speed and response. For max performance, you need only the amount of material for the stresses enduced--plus a little safety factor for street going cars. Why throw around extra weight when it is not neccessary? All chains stretch--no getting around the fact.
I'm sure economics played a role as well; from the GM designs I have seen, I believe the accountants make 90% of the engineering decisions. :nonod:
I'm sure economics played a role as well; from the GM designs I have seen, I believe the accountants make 90% of the engineering decisions. :nonod:
Melting Slicks
Joined: Jun 1999
Posts: 2,872
Likes: 3
From: Wilmington NC
Re: Difference between (miker61588)
the lt1 chains are even scarier....i need to go into mine and replace the stock chain with a cloyes dual roller... we just did this upgrade with my fathers, what a beautifule timing set that is. can only do it with an electric waterpump for those of you wondering, with that you can eliminate the gear behind the stock chain which drives the waterpump drive gear. then you can seal the front cover hold with a freeze plug and remove the waterpump drive gear from the front of the block. fewer mechanical moving parts means more power... and two roller chains instead of one means much stronger! my wimpy lt1 chain is probably stretched to high heavens right now!! well winter is here and i will be making the upgrade.. maybe i should go ahead and do it now while im gonna have the intake manifold off to swap to the comp R lifters and go with hardened pushrods. thats about half way down the motor..we'll see, nice set up you've got there Rich. only reason i am going with the dual roller is its 80 bucks and without the restirction of the the waterpump gear, it makes sense. but for a stocker chain to the heavy duty... you made a very nice upgrade decision!!
Chris
let us know how everythign comes along! :smash:
Chris
let us know how everythign comes along! :smash:
Race Director
Joined: May 2001
Posts: 14,165
Likes: 9
Re: Difference between (lcvette)
Hey LC, obviously I've got the electric water pump so let's talk about that double roller timing chain. Do you need to do any clearancing on that or does it fit right under the stock cover? Also how do you get the sprocket off the crank, does it just pull of easily or is it just something you have to fight with?
Burning Brakes
Joined: Dec 2000
Posts: 1,023
Likes: 0
From: Marietta, South Carolina, USA
Re: Difference between (junk)stock chain.... (RichS)
It looks like to me that the extreem duty GM LT4 chain is a True Roller Chain and the other is not if that is so then is it much better to go with the True Roller one.
Cloyes makes a True Double Roller timing chain and that is a really good one but I dont know if you can get it for the LT1 or LT4
Jay
Cloyes makes a True Double Roller timing chain and that is a really good one but I dont know if you can get it for the LT1 or LT4
Jay
Melting Slicks
Joined: Jun 2000
Posts: 3,215
Likes: 6
From: Tampa Florida
Re: Think about it.... (Turismo)
I believe I remember reading about the LT4 and having to add weight to the valvetrain do dampen some harmonics-reason why the upper cam sprocket is solid-so maybe the larger chain is beneficial in that aspect as well-I'm sure it is minor either way.
I show the stock LT4 chain/sprockets run about $160 plus shipping. That was the route I was looking toward but maybe not now...
Thanks for the picture!
:)
I show the stock LT4 chain/sprockets run about $160 plus shipping. That was the route I was looking toward but maybe not now...
Thanks for the picture!
:)
