MrDrezzUp

iTrader: (1)

On the way to work yesterday, my car (2005 C6) starts making a loud ticking sound. :-( After determining the ticking sound was coming from the engine I had the car towed to a GM dealership. Driver head was pulled and a lifter from cylinder 3 was the culprit. Looks like the roller portion of the lifter seized? That particular cam lobe is now scarred and the GM tech has advised the cam should be replaced.

If I can get this car running again, I will most likely be parting ways with it. Now that I need to buy a new cam I am thinking it makes sense to go with a perfect-street-manner cam to ease the burden of trying to trade-in / sell a modified car?

Considering the engine details below (and the desire for perfect street manners) would anyone be able to provide some insight as to what sort of cam I should be ordering? Or perhaps suggest a vendor I should call to get this sorted out? With the car in the shop (and me in a rental) I am really hoping to get this sorted out in a short period of time. :-)

Engine details:

LS3 Aluminum, 418 CI, 6 Bolt Main (ARP studs), 9.240" block deck height, 4.080" bore, 11.87 SCR, 8.52 DCR
Wiseco 2618 forged flat-Top pistons, 4.078", -0.005 piston to block deck height, -4cc valve reliefs
Total Seal AP Advanced Profiling steel-top & napier 2nd ring set
Callies CompStar forged crank, 4.00" stroke
Callies CompStar forged Connecting H beam Rods, 6.125" length, 2.100" crank pin, .927" wrist pin, ARP 2000 Rod Bolts).
L92 heads, milled 0.030, 65 CC chamber
LS3 GM MLS 0.051" gasket, bore diameter 4.100"
Comp 921 spring kit
Comp Cam 230 XFI (.612) / 234 XER (.598), 117 LSA
Ported LS3 intake
Manley hardened 7.375" pushrods
Clevite "H" series race rod and main bearings
Durabond cam bearings
PowerBond underdrive pulley
LG Pro Longtube headers (hi-flow cats)
Corsa Xtreme catback
DTE Stage 1, 4.10 rear diff
Vararam CAI
NGK TR6 (0.035 gap) spark plugs

ctd

iTrader: (1)

LPE has a couple of nice off the shelf grinds depending on how your springs are set up. Very OE manners & I bet they tune by themselves

STAR

iTrader: (1)

How did your current cam work? The driveabilty with that cam should have been perfect. I would say you can go slightly bigger and still have great street manners.

MrDrezzUp

iTrader: (1)

The current cam worked quite well.

I think an issue with "street manners" is that in many ways it is subjective. I.e. what is considered "perfect" by us (and by "us" I mean enthusiasts) is quite possibly different than what a non-enthusiast would think.

STAR

iTrader: (1)

I hear you. The best is when some peeps here throw in a huge cam with tons of overlap and they say it drives like stock I'm sure some tuners are better than others, but you can only tune so much.
I would probably suggest a 231/239 115+3 for your car.

WKMCD

iTrader: (2)

If you were unhappy with the drivability of that cam on a 117lsa, back the intake duration down to 224 and put it on a 115lsa. 224-234 115.

Just my $.02

DaFireMan

iTrader: (5)

the same type of issue happened to me with my stock ls parts, changed cam lifter trays pump an chain an it runs fine still, y u selling?

MrDrezzUp

iTrader: (1)

I don't have any issues with the cam, but if I am selling the car I might as well do what I can to make the car more like OEM.

I think your cam idea is excellent.

If I place a XER 224/234 115 into a DCR calculator I end up with:
DCR = 8.81

If the LSA is bumped up to 118 I would end up with a 8.56 DCR and overlap would be decreased even more to -7. Your thoughts?

Would a LS7 cam work? I have the same thread posted at CF and some very kind people have offered to provide me with a LS7 cam. I haven't been able to find the 0.006 specs for that cam though. Another forum member figures the resulting DCR for a LS7 cam on my car would be 7.54 (which sounds like it might be too low?).

Patrick G

iTrader: (14)

If you're going to sell it, I'd put in a stock LS7 cam and call it good. The next owner will want to put in their own cam anyway so you might as well have it mild.

If you were to keep it and wanted to give it more stock-like street manners, I'd install a 226/234 .598/.602" 119LSA +2 advance cam. It would make 20 more rwhp than the LS7 cam and have perfectly wonderful street manners.

MrDrezzUp

iTrader: (1)

Awesome advice. Thank you!

Which lobes are those? The closest match I could find were XER lobes?

Patrick G

iTrader: (14)

Negative. Those are endurance lobes from Engine Power Systems.

MrDrezzUp

iTrader: (1)

Ahh ok. Thank you!

LS6

You will hit the 550rwhp with over 450 rwtq at 4500 rpm

racerfox

iTrader: (4)

rolf not with that ls7 cam you wont