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I finally got to baseline my 2005 V today. The car was like this when I purchased it. Less than 9k miles on the driveline.
LQ4 bored .030" over, Mahle forged pistons, H-beam rods with ARP2000 bolts, new LS3 heads and manifold, Comp cam 219/227 112 lsa. Compression is 10.8:1.
Exhaust
Kooks 1 7/8" longtubes with Calico coating, Stainless Works full 3" with X-pipe O
And the results were:
Looks like I have room to add a little fuel and pick up a few more HP. I'm pretty happy with the results. I may switch cams down the road but possibly switching from 3.55 to 3.73 out back and picking up HPTuner are on the short list.
I am confused, i had a stock lower end, GMPP High compression heads, FAST intake, and a bag of other goodies, and i pushed 425hp but cannot remember the tq output.
Kinda had the same though. People are creeping up on 400s with out getting into internals. The lower gearing would be nice for road trips. The more aggressive gearing is nice but on interstate the lower gear would be nice.
That 8.8 is eating up some dyno digits. I'd also be interested to see the reputation of this particular dynojet. Frankly, the modest cam isn't a dyno monster but I bet it drives awesome. Almost 350ft lbs by 2500 is plenty stout for a 6.0 and mild top end. I'd be interested to know the condition of the motor and tranny mounts as well as the driveshaft and CV joint. If those rubber pieces are OEM, you're losing dyno dick measuring there too. What's the DA here? Intake and injectors, are they OEM LS3? TB is LS2? Need to know these details to make a reasonable judgment but given all the unknowns, it looks very reasonable but likely can be improved with the fundamentals.
It is a little soft I think. Would like to see you 420s, even with that rear. Maybe the cam just isn't optimal for the combo? Make sure simple things have been rules out: fuel filter, dirty injectors, plugs/wires, vacuum leak, dirty maf, etc. You ever seen that cam on a Ls3 headed 6.0? Those Ls3 heads can be sensitive to valve events. I've seen camped 408s do not much better. It's not easy to make power in real life but you can sort it out.
Has nemesis racing done similar combos? What's their reputation and that of their dyno? Assuming both of those answers are reasonable, the cam might be off just enough. Run it at the track to see your MPH for a sanity check.
Has nemesis racing done similar combos? What's their reputation and that of their dyno? Assuming both of those answers are reasonable, the cam might be off just enough. Run it at the track to see your MPH for a sanity check.
Nemesis had nothing to do with the car other than strapping it to a dyno A couple of other local V guys have done pulls with him and have been happy with their results...
Nemesis had nothing to do with the car other than strapping it to a dyno A couple of other local V guys have done pulls with him and have been happy with their results...
Who spec'd the cam and did the tune? I'm less interested in "happy with the results" than I am getting results that are in line with expected output for the mods, i.e. reliability of the data from the dyno. I'm not casting any stones, just trying to sort out the knowns and unknowns to attempt to help you get to the bottom of this. Were ALL of the fundamental tune and maintenance items I mentioned addressed and how? Nothing jumps out as wrong from your graph, the curve looks good, just the magnitude seems a bit low. How does it drive, how does it feel? Any codes stored?
Who spec'd the cam and did the tune? I'm less interested in "happy with the results" than I am getting results that are in line with expected output for the mods, i.e. reliability of the data from the dyno. I'm not casting any stones, just trying to sort out the knowns and unknowns to attempt to help you get to the bottom of this. Were ALL of the fundamental tune and maintenance items I mentioned addressed and how? Nothing jumps out as wrong from your graph, the curve looks good, just the magnitude seems a bit low. How does it drive, how does it feel? Any codes stored?
jm,
The cam was chosen by the previous owner. He works for a race shop in NC. What I got from him was that he wanted something that was fun to drive as opposed to being a numbers queen. The basis used for choosing that particular cam is unknown to me. When I initially looked at the car I had asked about power output. He had had the engine dynoed but wasn't able to produce the read out since he was in the middle of moving that he gave me were VERY close to what I saw in my own dyno.
As for the plugs, filter, etc, I really haven't checke them(other than oil level) as everything related was replaced 10k miles ago when the setup was built
.The car acts and drives like sick, albeit with more power. As for codes, I'll try to check this afternoon.
Last edited by reeseleblanc; 02-06-2017 at 01:36 PM.
The cam was chosen by the previous owner. He works for a race shop in NC. What I got from him was that he wanted something that was fun to drive as opposed to being a numbers queen. The basis used for choosing that particular cam is unknown to me. When I initially looked at the car I had asked about power output. He had had the engine dynoed but wasn't able to produce the read out since he was in the middle of moving that he gave me were VERY close to what I saw in my own dyno.
As for the plugs, filter, etc, I really haven't checke them(other than oil level) as everything related was replaced 10k miles ago when the setup was built
.The car acts and drives like sick, albeit with more power. As for codes, I'll try to check this afternoon.
Easiest thing would be to run it down the quarter mile and see what it traps. Do the math based on that and you'll have a really good idea on what's what. Any idea what kind of MPGs you get?
Yep. My best is 16.3 mpg and that's with the majority being interstate running about 80. That seemed a little low considering the gearing but I wasn't sure. Wideband shows 14.4-14.5 at cruise. Personally, I've always tuned my cars to run around 16:1 at light load cruising but again, I'm new to the LS game.
02-04-2017, 10:14 PM
2005 Dyno results 
