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[Z06] LGM G7X4 Heads and Cam Report

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Old 05-31-2007, 08:50 PM
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rfgoss1
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Default LGM G7X4 Heads and Cam Report

Hey Folks,
Well, I have been wanting to get LG's heads and cam done on my new, well not new anymore, Z and I finally was able to get it done. Thanks very much to Lou, Mike, Louis, Anthony, Sean, Kevin and the gang for getting me in and out so fast. I am heading out for the Hot Rod Power Tour on Monday and I just couldn't go out with less HP than I had the last time I went. Which was in 2004 when I had my 02Z with the first LGSR7 motor in it. that one made 530/530 but we had to do so much to get it there it wasn't funny. I told Lou and Anthony that I wanted at least 550RWHP and over 500 RWTQ. Anthony said the X4 cam would be between 550 and 580 RWHP.

Well, what started out as just heads, cam and clutch did expand a little. Here is what I ended up with:

G7X4 Heads and Cam pkg
Exedy Twin Disc Clutch
Ported TB
LG Radiator
Tuning, obviously
C5 Half Shafts
K&N Cold Air intake

Sean loaded up a tune and we fired it up on the dyno. First pull:

571.3 RWHP
523.4 RWTQ

Right out of the box. Awesome job Sean.

Second Pull putting in some fuel to richen it up a bit:

571.9 RWHP
521.5 RWTQ

Third pull, no changes just time to cool off:

571.5 RWHP
523.6 RWTQ

Clutch takes a little getting used to, but it definitely needs a big clutch. Cam is lumpy and may not be for the faint of heart. If you don't like lump, go with the X3. Idles with no surging at 1050 rpm. No loading up or backfiring, no surging anywhere in the range, and it is over 500 TQ from about 4200 to close to 6K and stays above 400 all the way to 7200.

I am very happy with the mods and of course the great service, as usual. Much thanks to Lou and the gang for making my Power Tour trip much more entertaining.

Now I need tires, coilovers, and a carbon fiber drive shaft.

Randy
Old 05-31-2007, 09:00 PM
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Ttt
Old 05-31-2007, 09:45 PM
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fa63
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Good stuff
Old 05-31-2007, 10:25 PM
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RENNtech
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Nice set up man, sounds like one sick ride!!! Congrats. . .

JJ

Last edited by RENNtech; 05-31-2007 at 10:29 PM.
Old 05-31-2007, 10:26 PM
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ayousef
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One word, KILLER!!!
Old 06-01-2007, 02:55 AM
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SharkbyteLT4
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boy, i would love to hear a sound clip on this one
Old 06-01-2007, 08:13 AM
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Originally Posted by NC_EB_Z06
boy, i would love to hear a sound clip on this one
Sound clip please. Awesome numbers
Old 06-01-2007, 11:55 AM
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1stZ
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Default Would you share

Randy,

Thx for posting. Great numbers! Would you mind sharing the total cost? Also, what is the difference between the X3 cams to yours?

TIA!

Patrick
Old 06-01-2007, 05:38 PM
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Webfoot
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Sweet! What was the price, please? And how fast were they able to get you in and out? Thinking about shipping my car to the mainland for a vacation and driving through TX.
Old 06-01-2007, 05:44 PM
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0Anthony @ LGMotorsports
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Sister thread with Randy's dyno and pricing info can be found here
http://forums.corvetteforum.com/show....php?t=1719319
Old 05-16-2008, 10:09 PM
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WFO
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Sweet. Love these cam jobs.
Old 05-20-2008, 01:32 PM
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QUICKSLVR
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Default killer rwhp numbers

What heads are you using ??? AFR 225 ??
Old 05-20-2008, 02:00 PM
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EdwardETraylorIII
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Let me see if I understand this correctly - You made those kind of numbers with stock exhaust manifolds? No headers?

Maybe I missed something? (It's altogether possible - I haven't yet had my coffee!)

Eitherway, great number! Not much on the road that will even keep up with you, much less pull on you!
Old 05-20-2008, 02:31 PM
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0Anthony @ LGMotorsports
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Originally Posted by QUICKSLVR
What heads are you using ??? AFR 225 ??
No, it is using GM LS7 heads. The AFR uses a completely different port design, and will not match to the LS7 intake manifold.
Old 05-20-2008, 07:28 PM
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Originally Posted by EdwardETraylorIII
Let me see if I understand this correctly - You made those kind of numbers with stock exhaust manifolds? No headers?

Maybe I missed something? (It's altogether possible - I haven't yet had my coffee!)

Eitherway, great number! Not much on the road that will even keep up with you, much less pull on you!
Hi,

We could only wish that these numbers could be made with stock manifolds.

LG Pro Long TUbe Headers were on the Goss Car.

Too much fun for just one guy to have.

Thanks
Lou G
Old 05-21-2008, 01:34 PM
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Originally Posted by Anthony @ LGMotorsports
No, it is using GM LS7 heads. The AFR uses a completely different port design, and will not match to the LS7 intake manifold.
So Anthony , what does LG do to the LS7 heads, port & polish & mill
or ?? Thanks for the info.
Old 05-21-2008, 06:05 PM
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0Anthony @ LGMotorsports
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Originally Posted by NC_EB_Z06
boy, i would love to hear a sound clip on this one
It will sound very similar to this one
G7X5 Idle Clip

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