ls1 to ls6 conversion ?
#1
ls1 to ls6 conversion ?
Ok I am trying to get my head rapped around what to do with the head gasket thickness and push rod lenght.
I already have 243 heads (non zo6) stock lenght valves and an ls6 cam 02 (smaller base circle) from my under standing if I use stock gasket thickness and 7.45 I should be fine, but what compression will be running with the smaller combustion cambers that the 243's have and the ls1 pistons? For now I would like to stay close to stock as I can if I even need to. Also if I do go with the higher compression what are the pros and cons?
Other mods: LT, ORY, catback, lid, and p/p t/b (no stall yet)
If I am incorrect about anything let me know.
I already have 243 heads (non zo6) stock lenght valves and an ls6 cam 02 (smaller base circle) from my under standing if I use stock gasket thickness and 7.45 I should be fine, but what compression will be running with the smaller combustion cambers that the 243's have and the ls1 pistons? For now I would like to stay close to stock as I can if I even need to. Also if I do go with the higher compression what are the pros and cons?
Other mods: LT, ORY, catback, lid, and p/p t/b (no stall yet)
If I am incorrect about anything let me know.
#3
TECH Junkie
iTrader: (100)
Ok I am trying to get my head rapped around what to do with the head gasket thickness and push rod lenght.
I already have 243 heads (non zo6) stock lenght valves and an ls6 cam 02 (smaller base circle) from my under standing if I use stock gasket thickness and 7.45 I should be fine, but what compression will be running with the smaller combustion cambers that the 243's have and the ls1 pistons? For now I would like to stay close to stock as I can if I even need to. Also if I do go with the higher compression what are the pros and cons?
Other mods: LT, ORY, catback, lid, and p/p t/b (no stall yet)
If I am incorrect about anything let me know.
I already have 243 heads (non zo6) stock lenght valves and an ls6 cam 02 (smaller base circle) from my under standing if I use stock gasket thickness and 7.45 I should be fine, but what compression will be running with the smaller combustion cambers that the 243's have and the ls1 pistons? For now I would like to stay close to stock as I can if I even need to. Also if I do go with the higher compression what are the pros and cons?
Other mods: LT, ORY, catback, lid, and p/p t/b (no stall yet)
If I am incorrect about anything let me know.
#6
Check your pushrods...I think you will find the 7.400 rods are the ones you want to use. I just did this conversion and that is the length that fit perfectly. 7.450 is a HUGE change.
Trending Topics
#11
to basicly an ls6 with LT's and cut ou,t p/p t/b (along with the free mods I have not done yet) I should still pick up a few tenths in the 1/4 I loooooove working on my car so if I had to do it again later ohwell but its going to be awile anyway im going to do susp. tires, rear and stall before I dig back into it if its not ready to be rebuilt anyway.
#14
I am using a true set of 243 LS6 heads, but without the long valves.
I am using a genuine GM head gasket that I believe is part number 12589227. That was the thickness I could live with for a helluva lot better price than a Cometic, etc.
I am using a Comp Cams 54-456-11 camshaft that is ground on a small base circle. My understanding is it should compare to the cam you are using as far as base circle is concerned.
I am using new genuine GM lifters and Comp Cams Hi-Tech 7.400 push rods...stock rockers...Comp 918 springs...stock retainers and keepers. I did use top hat seals, but that has no bearing on this.
I would bet the farm my son's 05 LS6 in his CTS-V has 7.400 pushrods in it.
This is all very interesting to me because I am seriously considering going to a 7.375 push rod. Shorter instead of longer. I like my pattern across the valve, but I want to try and reduce my lifter preload a bit. It's right where everyone says it should be (1.25 to 1.5 turns of preload) but I want to try and reduce that and see if I can't quiet up the valve train a bit. The radical ramps cause most of it, but it's worth playing around with just to see.
I am using a genuine GM head gasket that I believe is part number 12589227. That was the thickness I could live with for a helluva lot better price than a Cometic, etc.
I am using a Comp Cams 54-456-11 camshaft that is ground on a small base circle. My understanding is it should compare to the cam you are using as far as base circle is concerned.
I am using new genuine GM lifters and Comp Cams Hi-Tech 7.400 push rods...stock rockers...Comp 918 springs...stock retainers and keepers. I did use top hat seals, but that has no bearing on this.
I would bet the farm my son's 05 LS6 in his CTS-V has 7.400 pushrods in it.
This is all very interesting to me because I am seriously considering going to a 7.375 push rod. Shorter instead of longer. I like my pattern across the valve, but I want to try and reduce my lifter preload a bit. It's right where everyone says it should be (1.25 to 1.5 turns of preload) but I want to try and reduce that and see if I can't quiet up the valve train a bit. The radical ramps cause most of it, but it's worth playing around with just to see.