Gabbiani

iTrader: (20)

2005 CTS-V
Stock intake
Pacesetter 1 3/4" long tubes
No cats
Stock x/resonator
No mufflers
EPS 226/226 .598/.598 117+4
Copm 918 springs
7.425 pushrods
Tune by me
27 degrees timing
A/F @ 12.8

Can post hp tuner logs tonight if anyone wants to look at them. Look normal. 87% duty cycle 43 #/min on the maf up top. Looking at the log vs other cars I have tuned it should have made way more power. Hell the 425 rwhp vette I did earlier this year had basically the same maf flow and map readings. I was only seeing 92-93kpa with the filter out but still thats about normal on other ls6 cars I have seen.

I know I am running a blower or emissions cam but does the 117 really hurt that bad. People make my numbers with just headers. Can't afford the blower right now - if a cam swap will pick up another 40hp I'll head to the for sale section. Stock on a different dynojet I made 330.

Thanks to anyone who looks.

KC Henry

364 rwhp for a small cam only 5.7 seems on par to me, my cam only 6.0 LQ9 only dyno'd 388 rwhp with a muuuuch larger cam.

Take it to the track see what kind of ET it turns, those are the only numbers that count anyways.

hardcore4sure

iTrader: (1)

Why 7.425 pushrods? Shouldn't you need 7.4.

Gabbiani

iTrader: (20)

Lol, normally yes but the cts-v isn't much of a track car either. Dyno queen is all I have going for me

Gabbiani

iTrader: (20)

Thats what my kit came with. I didn't measure. Reading posts it seems to be a mixed bag of 7.40 or 7.425. I could throw my stock ones in pretty easily. I would expect the car to run rough or break up or something.

I do smell unburnt fuel at idle even after leaning it way out and running timing up and down. This cam has no overlap.

hardcore4sure

iTrader: (1)

It's cuz you have no cats, I have the same cam on a 115 and can smell gas. I've seen a couple other guys have the wrong pushrods in and the car seemed to run fine,maybe a little valve train noise, but were just down on power. Just a thought . You should be higher than that with just LTs, I would expect you be at least 400rwhp with that cam.

Gabbiani

iTrader: (20)

7.400s ordered - Will measure too.
Volant intake coming - don't think it will really make a difference but ruling it out.
New plugs going in too

Thanks and any other thoughts appreciated

Kaane

iTrader: (2)

my 2005 CTS-V made 330whp stock, they sure dyno low, but i would expect more then 360whp with cam and longtubes.

I have almost identical cam in my M3 with 116LSA made 400whp, but I have TSP Terminator heads.

Gabbiani

iTrader: (20)

Thanks - I looked over your build trying to find people with similar cams. Heavy flywheel, long *** shaft, irs all hurt us. But really 330 from 405 flywheel is still around 18% loss. Guess somewhere between a 6 speed and auto f body.

yonerhottlt1

iTrader: (21)

Numbers do seem a tad bit low but they are just dyno numbers. As we all know, the track tells the real story. The CAI and correct sized pushrods definitely wont hurt at all

KC Henry

If a 2 TON granny tank can make it down the track at a decent clip after a Cam-Only swap, I am sure a CTS-V will do just fine.

redbird555

iTrader: (14)

I think those numbers are a bit low man. Ctsv's tend not to be dyno queens but still I just put down 370whp on a mustang dyno through an auto with just a bolt on ls6

Badmeat

iTrader: (1)

My 2004 crate LS6 with longtubes and a lid put down 365/359 on a Dynojet. I've quit worrying about dyno numbers, I look at trap speed as a judgement of power.

And IDK if I'd order pushrods before checking the 7.425's that are in the car. I just ordered a 230/238 from EPS and Geoff recommended 7.425's....

My guess is 385-395whp would be what your car would put down.

Slowhawk

iTrader: (12)

The 117 duration will ussually flaten the curve alot. The low KPA reading is probly a loss of 10-15hp.

thunderstruck507

iTrader: (18)

Let us know how you like it, I am loving mine. It is stronger than my old 230/224 reverse everywhere (but some of that is the heads too)

For what it's worth measuring is a MUST. Geoff recommends 7.425 with stock headed cars, my heads are shaved .010 and use stock thickness gaskets and an older set of Vortec lifters.

Using 7.4 pushrods I am right at 2 turns to 22ft/lbs from zero lash which is on the high side of acceptable if I am understanding correctly. I am going to measure with my pushrod tool in the near future and I expect to end up putting 7.375 pushrods in.

Badmeat

iTrader: (1)

Yeah, that's the first question he asked after I picked a cam... "are your heads milled?"
It will be installed with the help of someone who has done this multiple times before. I'm buying a valve spring compressor today and I'm anxious for January to get here so I can haz my cam

So back to the point for the OP, Geoff recommends 7.425 pushrods on stock heads for a reason. The base circle of his cams are different than stock, IIRC

Gabbiani

iTrader: (20)

I'm going to call him this morning. Will be after Christmans before I can measure them. I'll report back but seems most of the comp cams change base circle right around .600 (I know this isn't every case)

As far as I know the motor is healthy. Made what it should stock. I'll check in later.

Gabbiani

iTrader: (20)

He said same thing - 7.425 on all his stock stuff. Geoff doesn't recall this cam though. Trying to contact the person who bought it to see where he got it. Going to measure either way. May just pull it out and grab an NA cam, pass this one off to someone going turbo/blower.

Gabbiani

iTrader: (20)

Could it be clutch slip? I smelled friction material on the dyno but assumed it was the brake. I'm used to an eddy dyno. Road trip this weekend and I can't get into 5th from wot 4th.

Gabbiani

iTrader: (20)

Well scratch that. Clutch is having issues but the logs from the dyno show a linear build between rpm and speed.