Futral LS2
TECH Regular
Joined: Dec 2003
Posts: 486
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From: Cherry Hill, New Jersey State
This is real strong car
I keep seen the 6.0 engine is performing well with the l92 than the 6.2 engine
I have seen a guy made the same route, where the head is ported and mill to allmost 40 but not cnc, intake is stock ported with kooks headers and catback, cam (227/239) and with tuning made over 500rwhp (i think 512rwhp) & 470rwtq but alot says this is impossible.
When i saw his car, I made my project and even with the same cam spec., but the project equipments is a little different, it is on a LS1 bored to accept 4.0845" & stock cranshaft (3.622"), stock L92 but milled 15 (CR is almost 11.3:1), stock LS3 intake manifold, stock LS3 injectors, TB 102mm, headers 1 3/4" primaries with 3" collector, 3" cat back, UD pulley. I hope to get 480rwhp & 450 rwtq. The tuning will be after a week hopfully.
I keep seen the 6.0 engine is performing well with the l92 than the 6.2 engine
I have seen a guy made the same route, where the head is ported and mill to allmost 40 but not cnc, intake is stock ported with kooks headers and catback, cam (227/239) and with tuning made over 500rwhp (i think 512rwhp) & 470rwtq but alot says this is impossible.
When i saw his car, I made my project and even with the same cam spec., but the project equipments is a little different, it is on a LS1 bored to accept 4.0845" & stock cranshaft (3.622"), stock L92 but milled 15 (CR is almost 11.3:1), stock LS3 intake manifold, stock LS3 injectors, TB 102mm, headers 1 3/4" primaries with 3" collector, 3" cat back, UD pulley. I hope to get 480rwhp & 450 rwtq. The tuning will be after a week hopfully.
Thread Starter
Teching In
Joined: Aug 2008
Posts: 41
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It is easy to make power with these motors, I put a 6.0 out of a 07 model new body 2500 which came with the L92 heads n my 06 1500. I put a pulley, cold air, full exhaust, and the Ls9 cam n it and it put down 410/405 through my factory 20's and the motor is only 9:1 compression. 
Teching In
Joined: Nov 2010
Posts: 29
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Actually I think that is a bunch of lies. There is no way a stock bottom end ls2 is making 520rwhp. I have talked to several shops in the area and the most they can squeeze out of a N/a stock bottom end is in the 470 range with top of the line parts. There is no way that that combo put out that kinda of power. I assume, someone went into the motor and did something or someone was playing with the dyno somehow and is just using this as a clever ruse to sell some parts to 20 years olds with Visa cards. The power level is not consistent with what everyone else with similar type parts combinations is making. Even with an LS3 M6 car with great heads and cam combo is not going to make that much power N/a.
470 is NOT the limit of a stock bottom end N/A LS2. 
I have a friend with an LS2 GTO that made 456 with just a mild cam and a FAST 102. The numbers are definitely higher than you'd expect, but maybe the combo was just nailed and just works. That's why dyno numbers should be taken with a grain of salt.
I'm interested to see the car back up the #s with some GOOD mph at the track.
I have a friend with an LS2 GTO that made 456 with just a mild cam and a FAST 102. The numbers are definitely higher than you'd expect, but maybe the combo was just nailed and just works. That's why dyno numbers should be taken with a grain of salt. I'm interested to see the car back up the #s with some GOOD mph at the track.
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Actually I think that is a bunch of lies. There is no way a stock bottom end ls2 is making 520rwhp. I have talked to several shops in the area and the most they can squeeze out of a N/a stock bottom end is in the 470 range with top of the line parts. There is no way that that combo put out that kinda of power. I assume, someone went into the motor and did something or someone was playing with the dyno somehow and is just using this as a clever ruse to sell some parts to 20 years olds with Visa cards. The power level is not consistent with what everyone else with similar type parts combinations is making. Even with an LS3 M6 car with great heads and cam combo is not going to make that much power N/a.
Regardless I am sure the thing rips and and is crazy fun to drive!
Teching In
Joined: Nov 2010
Posts: 29
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Im guessing these guys are a bunch of Dyno Queens. I would like to see some time slips. I guess my other questions would be that if they were making these made up numbers how are the stock rod bolts holding up? If they were making those kinda numbers the rod bolts and powdered metal connecting rods would really not much of life span. I do believe that with a built 408+ CI combo getting in the 500 range is possible but is still difficult. The other issue I have the made up numbers is how bid of a cam are they running? I looked on the Futral website and he even says that anything beyond the F15 cam has issues with PTV clearance. So even with great heads I dont see how that combo even with an F15 cam and aftermarket heads is putting out 525. I can see maybe in the 460-470 range with a stock bottom end, but 525 just does not seem realistic.
Im guessing these guys are a bunch of Dyno Queens. I would like to see some time slips. I guess my other questions would be that if they were making these made up numbers how are the stock rod bolts holding up? If they were making those kinda numbers the rod bolts and powdered metal connecting rods would really not much of life span. I do believe that with a built 408+ CI combo getting in the 500 range is possible but is still difficult. The other issue I have the made up numbers is how bid of a cam are they running? I looked on the Futral website and he even says that anything beyond the F15 cam has issues with PTV clearance. So even with great heads I dont see how that combo even with an F15 cam and aftermarket heads is putting out 525. I can see maybe in the 460-470 range with a stock bottom end, but 525 just does not seem realistic.
This is another 2007 C6 M6 we just made some pulls on. Stock bottom end Trick Flow heads, Fast manifold, and full bolt ons. The customer installed the parts and hade someone else tune it.
Attachment 354522
Attachment 354522
It's funny you mention 408 cause they just completed a 408 (he even posted a thread about it in this section) that made over 600rwhp. My car did 408rwhp bone stock with no tune. My trans am with a set of heads would have done over 500 easy. Seems like you need to do more research buddy.
It's funny you mention 408 cause they just completed a 408 (he even posted a thread about it in this section) that made over 600rwhp. My car did 408rwhp bone stock with no tune. My trans am with a set of heads would have done over 500 easy. Seems like you need to do more research buddy.
But Dyno numbers can be different dyno to dyno. So if the car goes out and runs 130+ it's making some good power.