bmylez

iTrader: (3)

Alright guys, mods are: K&N intake, super ported LS2 manifold, Kooks 1 3/4 headers, high flow cats, Magnaflow mufflers. Made 351/340, untuned. That is horribly anemic for the parts I have, I feel. 72,500 miles, freshly changed oil (Castrol Syntec Edge), fairly new AC Delco plugs, etc. Tempted to do a compression test, although the motor does not eat oil or sound unhealthy. Just feeling a little bummed.

07CTS-V

iTrader: (6)

Sounds about right for those mods. It's only a reference number anyhow.

NIKDSC5

iTrader: (10)

On my phone. What mods do you have? Also that is untuned and about perfectly where it should be. Tuned you might pick up 20 hp

adanieljohnson1

iTrader: (1)

Looks like he has K&N intake, ported LS2 intake manifold, Kooks 1 3/4" headers, high flow cats, Magnaflow mufflers. My guess is that he should be around 380-90whp after tune...

bmylez

iTrader: (3)

K&N intake, super ported LS2 manifold, Kooks 1 3/4 headers, high flow cats, Magnaflow mufflers.

bmylez

iTrader: (3)

I'm looking at other videos, and yes, I understand that every dyno is different...however, I'm seeing guys making 366 with intake/catback...how I am 15whp down with way more flow mods??

ls1_chevelle

iTrader: (9)

your car isn't tuned.....

NIKDSC5

iTrader: (10)

Have it tuned and I bet you will be pleased. I bet you are running lean as crap.

bmylez

iTrader: (3)

Yeah, I get that...but aren't people putting down 360 with fewer mods? Not sure if you've heard of Josh Armstrong, but he did the porting on the manifold. He claimed pretty good gains untuned, although he comes from the GTO world. I'd like to think it wasn't just a sales gimmick, but it looks like it didn't help me anymore than a stock manifold.

ryridesmotox

Anyone else notice that puff of smoke toward the end?

Get it tuned dude, you'll be able to take advantage of the increased airflow. Many people find a motor's ECU will compensate for about 20% airflow... You throwing down 350-360 ish is right where I would assume the stock computer's limits are.

serik21

You are out of fuel at top. Get it tuned you should be around 375-380

bmylez

iTrader: (3)

Yes, I was going to mention that. Pretty sure my cats are already failing. That smoke + pop usually indicates that. I'm rockin Thunderbolts, which are cheapies. If they show signs of plugging up, might just core them out as I didn't plan on replacing them this quickly.

07CTS-V

iTrader: (6)

It is dyno dependent. You can't compare what other people are getting. My heads, cam, headers, full exhaust LS2 only made 400/400 on the dyno but I pulled on Maggied V's that claimed way more Hp. You don't have anything wrong with your motor, no need for a compression check, get a decent tune done and you'll be amazed at the difference.

Even 'Super ported', the LS2 intake manifold sucks.

bmylez

iTrader: (3)

I'm skipping the bolt-on tune and going straight for a cam (Torquer v2). I just wanted to dyno before I got the cam so I knew if something was wrong and also to see the delta. To add insult to injury, I brought my friend with me who has a 2013 5.0. With a canned tune, intake, resonator delete, and catback, he threw down 389...those motors just aren't fair.

DACTARI

iTrader: (1)

No. You have dramatically increased airflow. Your engine is running too lean, and pulling timing to avoid detonation. Ask me how I know. If you take a peak at your headers, you may notice them glowing after a pull. You need a tune badly.

bmylez

iTrader: (3)

Yes, on the lower 348 pull, it had two distinct dips where it was pulling timing. Alright, well since I don't want to waste money on an interim tune, I just need to get the cam in sooner than later and be done with it.

MN_V

iTrader: (5)

Those engines are 420hp crank from the factory, plus his tune so that sounds right. I think your numbers sound decent pre-tune.

bmylez

iTrader: (3)

Yeah, but does an LS2 pick up ~35whp from a canned tune and intake? My friend still has stock cats...I doubt res. delete + catback is worth much.

DACTARI

iTrader: (1)

With a good tune, on the same dyno/same day as your buddy, you will be ahead by 15-30 HP, all other factors being equal. Your are getting killed right now with a suboptimal tune.

If your'e gona wait till you cam it before you tune, just take it easy. You don't want to do any damage.

bmylez

iTrader: (3)

Interesting. Out of all the reading on here I've done, never seen it mentioned that running bolt-ons required a tune or damage would ensue. I'm used to that requirement on a boosted 4 cyl (used to own a Mazdaspeed 3), but I see lots of guys on here with headers and intake, no tune. I definitely don't beat on my cars, but I do take it to red line a few times a day. I will lay off it until cam time, if you insist, though.