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L92 cam recomendation

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Old Jan 5, 2009 | 12:59 PM
  #21  
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my cam is a 238/250 .6xx .6xx for my l92's with a sheet metal intake on a 408
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Old Jan 5, 2009 | 02:01 PM
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Originally Posted by garrettpen
lg g6x3 Search in the dynamometer section to see results
Here is one result with that particular cam.

ArthurJGuy 461/421 M6 234/245 .64x/.60x 111
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Old Jan 5, 2009 | 02:02 PM
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Originally Posted by HPfreak820
I am mainly looking for a bumpstick that will make descent power N/A with a 150 shot on occasions. Its got to have a nasty lope and not have any PTV issues on an LS2 with flat tops. The L92 are stock for now and I will be having a ported L76 intake. So basically a stock LS2 with L92 and the basic bolt-ons. I'm trying to see what's working for people doing the L92 head swaps.
Did you look at the link I posted?
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Old Jan 5, 2009 | 02:32 PM
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Originally Posted by 8ByGoat
Here is one result with that particular cam.

ArthurJGuy 461/421 M6 234/245 .64x/.60x 111
Are you saying that those at the secret G6x3 specs?
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Old Jan 5, 2009 | 02:43 PM
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Originally Posted by Hotrod406
Are you saying that those at the secret G6x3 specs?
Yes.

This has kind of turned into a project/pet peeve of mine. So many people ask about what cam for L92 heads. So many people giving so many opinions as to what L92 heads like (most of these people don't even drive cars with L92 heads on them). When I did my swap I was told by many "experts" my cam was all wrong. That L92s like this big split etc etc.

I see so many threads that start off with "just got done doing the L92 swap on my car and such and such spec'd out an L92 specific cam for me and I am disappointed with the results".

So I took the time to do the research, gather all of the FACTS, and let the results speak for themselves.

Once again the list, like what the op wanted, is just a list of 364ci motors with L92 heads on them. No strokers.
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Old Jan 5, 2009 | 02:45 PM
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I like my new cam...


236/248 with XER lobes.......


vs the

236/236 on XFI lobes that I paid an arm and leg for!
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Old Jan 5, 2009 | 02:48 PM
  #27  
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Originally Posted by 8ByGoat
Yes.

This has kind of turned into a project/pet peeve of mine. So many people ask about what cam for L92 heads. So many people giving so many opinions as to what L92 heads like (most of these people don't even drive cars with L92 heads on them). When I did my swap I was told by many "experts" my cam was all wrong. That L92s like this big split etc etc.

I see so many threads that start off with "just got done doing the L92 swap on my car and such and such spec'd out an L92 specific cam for me and I am disappointed with the results".

So I took the time to do the research, gather all of the FACTS, and let the results speak for themselves.

Once again the list, like what the op wanted, is just a list of 364ci motors with L92 heads on them. No strokers.
I'm in the same boat but I had to complicate matters by building a sheet metal intake. I'm seriously considering selling the intake and getting an L76 so at least I'm on the same plane as everyone else.

My cam has a similar split to the vaulted G6x3 but wider LSA and 8 degrees less duration. I'm making dick power and I don't know why.
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Old Jan 5, 2009 | 04:33 PM
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Originally Posted by Hotrod406
I'm in the same boat but I had to complicate matters by building a sheet metal intake. I'm seriously considering selling the intake and getting an L76 so at least I'm on the same plane as everyone else.

My cam has a similar split to the vaulted G6x3 but wider LSA and 8 degrees less duration. I'm making dick power and I don't know why.

Perhaps the cam was not chosen to fit the intake and heads. Did whoever speced the cam know about the intake runner length, taper, head flow, etc. as well as all of the rest of the engine specs? If he/she didn't perhaps you need to rethink who should do your cams.

Jon
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Old Jan 5, 2009 | 04:41 PM
  #29  
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Originally Posted by 8ByGoat
Here is one result with that particular cam.

ArthurJGuy 461/421 M6 234/245 .64x/.60x 111
Originally Posted by Hotrod406
Are you saying that those at the secret G6x3 specs?

Originally Posted by 8ByGoat
Yes.
I can tell you, that you are wrong.
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Old Jan 5, 2009 | 04:49 PM
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Originally Posted by Old SStroker
Perhaps the cam was not chosen to fit the intake and heads. Did whoever speced the cam know about the intake runner length, taper, head flow, etc. as well as all of the rest of the engine specs? If he/she didn't perhaps you need to rethink who should do your cams.

Jon
Yes, all that info was provided. I don't know what the timing is because it's a mail order tune so I'm not pointing any fingers yet. It seems that I'm a lot farther off than timing could correct though.
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Old Jan 5, 2009 | 08:22 PM
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Originally Posted by dlove
I can tell you, that you are wrong.
How you figure?

We are talking about this cam right?


G6X3 Cam

If we are and you are running the same cam then one of you was lied to.

Another one of these super secret special cams
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Old Jan 5, 2009 | 08:23 PM
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239/254 .6xx/.6xx 114ls , Was told it would never work! we will find out soon. 408, 11.7:1 , home ported L92s, carbed GMPP intake. Spraying 300.
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Old Jan 5, 2009 | 08:56 PM
  #33  
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Originally Posted by Hotrod406
Yes, all that info was provided. I don't know what the timing is because it's a mail order tune so I'm not pointing any fingers yet. It seems that I'm a lot farther off than timing could correct though.
In that case it may be the cam person who is the problem.

I wouldn't toss the SM intake just yet. Perhaps you could find a cam person who takes a scientific approach to choosing valve events rather than just guessing. I believe they are a very small minority, but they are essential when an engine is off the beaten track as would be a SM manifold with different runner length from stock.

The engine doesn't "guess" about what it wants/needs to make power, so neither should the person who picks the valve events.

I don't do cams but I did drive by a Holiday Inn Express over the weekend.

My $.02.


Jon
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Old Jan 5, 2009 | 09:11 PM
  #34  
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Originally Posted by veee8
238-242 .605-.610 115 LSA. Turbocharged with ported L92's. Awesome driveability, and huge power. GM single plane with elbow.
You have proven that on a turbo motor at least; the small split is the way to go. Here's a question for you guys, these heads flow well past .650" lift, maybe .700" before they go stagnant, so why aren't there more (any?) .650"+ lift cams yet? Is it spring selection? hydraulic lifter unable to handle the spring pressure for a .650"+ cam?? Where does one draw the line spring pressure wise or lift wise between hydraulic and solid lifters?
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Old Jan 5, 2009 | 09:14 PM
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It was a combination of both for me. It's a street car and I don't want to change valvesprings every year. I also don't want to run (buy) solids when the LS7s are so cheap.
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Old Jan 5, 2009 | 09:17 PM
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Originally Posted by 1CAMWNDR
You have proven that on a turbo motor at least; the small split is the way to go. Here's a question for you guys, these heads flow well past .650" lift, maybe .700" before they go stagnant, so why aren't there more (any?) .650"+ lift cams yet? Is it spring selection? hydraulic lifter unable to handle the spring pressure for a .650"+ cam?? Where does one draw the line spring pressure wise or lift wise between hydraulic and solid lifters?
I don't know why it is but I don't think his is the only application that "proves" this. I have a 4000lb GTO with a stock tranny and a stock rear end and have run 11.22 at 120mph. This was done at a track with a reasonable DA (300).
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Old Jan 5, 2009 | 09:32 PM
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Originally Posted by Hotrod406
I'm in the same boat but I had to complicate matters by building a sheet metal intake. I'm seriously considering selling the intake and getting an L76 so at least I'm on the same plane as everyone else.

My cam has a similar split to the vaulted G6x3 but wider LSA and 8 degrees less duration. I'm making dick power and I don't know why.
Depending on the runner length, you probably either need to ditch the intake, or put a big solid roller in it, jack up the compression, and spin it to the moon.
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Old Jan 5, 2009 | 09:35 PM
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Originally Posted by edcmat-l1
Depending on the runner length, you probably either need to ditch the intake, or put a big solid roller in it, jack up the compression, and spin it to the moon.
Runners are about 5.25", non tapered, cross section the size of the stock port with the negative lip at the top removed. I'd appreciate any input I can get on this.
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Old Jan 5, 2009 | 09:48 PM
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Originally Posted by Hotrod406
Runners are about 5.25", non tapered, cross section the size of the stock port with the negative lip at the top removed. I'd appreciate any input I can get on this.
With the cam that's in it, you'll do better with the L76. It will make much better low end and mid range. The short runners on the small motor will make no low end, weak mid range, and only make good power up top if you spin the beegeebeees out of it. With a big *** cam that can spin that high. And valve train that can keep up.
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Old Jan 5, 2009 | 09:55 PM
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Originally Posted by edcmat-l1
With the cam that's in it, you'll do better with the L76. It will make much better low end and mid range. The short runners on the small motor will make no low end, weak mid range, and only make good power up top if you spin the beegeebeees out of it. With a big *** cam that can spin that high. And valve train that can keep up.
I agree there. Max power was at 7000, as high as I dared run the stock shortblock.

I should probably stop hijacking the thread and let some other people chime in.

There's such a wide range of cams being run with similar combos it's crazy.
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