Anyone tried LS6 cam in a LQ4 wL92 Heads?
#1
Anyone tried LS6 cam in a LQ4 wL92 Heads?
I have a carburated lq4 with L92 heads on it and A LS6 (PN 12565308) 02-04 cam. The package is all together except for the cam. I have the ls6 cam sitting in my garage, I even have the ls6 springs. My valves are the lighter stock LS3 valves which are still heavier than the stock Ls6 valves so I understand I should get good valve springs. It will be in a tubbed out, pro street chevy II wagon, th350 with 4.88:1 gears, 3540LBS, and it wont need to rev more than 6500 rpm. I dont care about not having a rough idle. I have seen 114 lsa cams make a ton of power with these heads but not much info on 117.5 lsa.
I dont have much $ left now. Should I use the ls6 cam?
Has anyone tried an Lq4 with L92 heads and the LS6 cam? Was it good?
Thanks in advance.
I dont have much $ left now. Should I use the ls6 cam?
Has anyone tried an Lq4 with L92 heads and the LS6 cam? Was it good?
Thanks in advance.
#6
Although the reason why we would want to run this cam shouldn't matter, but as it states up above, the LS6 cam and valvesprings I already have in my garage. Cost $0. Hot cam or any other cam and valve springs to purchase up here in Canada will run more than $1000.00. I like the $0 price tag if I can get away with it. The only issue I could see is the valve accelerations might be too much with a heavy L92 2.165 valve, As Jim Hicks, cam designer for gm stated below about using the ls6 cam with out lighter valves and LS6 springs...
"What about updating ’01 LS6es with the ’02 cam? Don’t do it, unless you add the ’02 valves and springs. Why? "The biggest issue is:," Jim Hicks stated, "without the lightweight, hollow-stem valves, you loose about 300-400 rpm in limiting speed. If you continue to run the LS6 calibration, where the fuel cutoff is 6600 rpm; you’re gonna be running into some significant valve train distress at 6200-6300 rpm. I have no idea how durable that combination is going to be over time."
"What about updating ’01 LS6es with the ’02 cam? Don’t do it, unless you add the ’02 valves and springs. Why? "The biggest issue is:," Jim Hicks stated, "without the lightweight, hollow-stem valves, you loose about 300-400 rpm in limiting speed. If you continue to run the LS6 calibration, where the fuel cutoff is 6600 rpm; you’re gonna be running into some significant valve train distress at 6200-6300 rpm. I have no idea how durable that combination is going to be over time."
#7
On The Tree
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I'm running a very similar setup, and it runs great. Instead of L92's I have P&P 243's milled to 60.9CC. I'm also running Patriot Dual Springs, and sodium filled small valves, however, so there's 0 valve control issues on my end. If you're worried about the valve control with the big, heavy L92 valves, consider a good spring kit.
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#8
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You have a set up that is going to be held back because of a cam and valves. I can say this with a lot of confidence.
Wait get the money you need to get the cam needed to make sure that set up runs how you want it to run instead of just settling just to get the engine running. Now if this is your only mode of transportation then I guess you do with what you have, but over all I was in your shoes years ago. I ended up buying a cam and doing the swap all over again 3 months later.
Again though is your build and your time. Always remember money you can get back time you can't.
Wait get the money you need to get the cam needed to make sure that set up runs how you want it to run instead of just settling just to get the engine running. Now if this is your only mode of transportation then I guess you do with what you have, but over all I was in your shoes years ago. I ended up buying a cam and doing the swap all over again 3 months later.
Again though is your build and your time. Always remember money you can get back time you can't.
#9
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Hell, if its free I say do it. Whats the worse that could happen? you not like it and end up having to buy a cam anyway. Hell, it might run decent and you be happy with it.
#11
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I have a really dumbed-down way of looking at this:
The 02-04 LS6 cam is much hotter than the 01 cam it replaced. The 01 cam is used in the 05-07 LS2 engine which displaces 6.0L just like his motor which also has the benefit of higher-flowing L92 heads. So essentially he's just building a LY6 (353hp stock with truck manifold and truck tune) and putting a baby cam in it. So it's not like he's downgrading anywhere.
Sorry for the response that lacked any technical merit but it's the only way I could justify using that cam in that combo. I'd sell it to a 5.3 guy and get what you want when you can.
My guess is that you would barely break 400rwhp with that setup and supporting mods.
The 02-04 LS6 cam is much hotter than the 01 cam it replaced. The 01 cam is used in the 05-07 LS2 engine which displaces 6.0L just like his motor which also has the benefit of higher-flowing L92 heads. So essentially he's just building a LY6 (353hp stock with truck manifold and truck tune) and putting a baby cam in it. So it's not like he's downgrading anywhere.
Sorry for the response that lacked any technical merit but it's the only way I could justify using that cam in that combo. I'd sell it to a 5.3 guy and get what you want when you can.
My guess is that you would barely break 400rwhp with that setup and supporting mods.
#13
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His reasoning for wanting to go with the LS6 cam is not due to its desireable profile for his setup, merely the fact that its probably within spitting distance from a camless motor and he wants to avoid spending more money at this point.
#14
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I would do it if you dont have/dont want to spend the money on a different cam.