RealQuick

iTrader: (14)

Well… I added a Precision 7675 turbo over the winter (Huron kit).

The car has the following mods:
2010 Camaro SS M6
Stock LS3 Bottom end 24k miles
AI 280cc LS3 heads
VR 235/2351 .6xx/.6xx 115LSA turbo cam
Ported LS3 Intake
NW 102 TB
1000cc injectors
ADM FPCM
ZL1 Fuel Pump
SLP underdrive Pulley
No cats
Borla ATAK

Car made ~460rwhp N/A before the turbo… in N/A form 1st gear was useless as it would smoke the tires above 4krpm from a roll.

Now… I have street tuned the current setup with the turbo… dialed in the A/F 11.0-11.2 and my timing is as low as 11.5 degrees at pk trq and 15 deg at pk hp while running 7psi. As you can see, the tune is conservative until I can get on the dyno in September and dial it in with more boost and meth.

My impressions are that the car is a slug LOL… compared to N/A. I fully expect this car to be around 600-650rwhp at 8psi, but at the current 7psi setting I don’t think I am even at 500rwhp. It won’t even spin the stock street tires in 1st gear @ 7psi!!

The car pulls smooth with no knock... I dunno, maybe it pulls so smooth that the SOTP feeling is deceiving.

That’s all for now… I’ll post back up with results from the dyno.

Jon

JoeNova

Smallish turbo for that setup, with the wrong cam for the combo.

RealQuick

iTrader: (14)

I think both aren't ideal, but shouldn't be causes of low power (or the feel of lower power).

The turbo cam is interesting though... some companies like normal pattern cams, some recommend single pattern, and some recommend reverse split. Hard to know which is best without some back to back testing. I went with Vengeance Racing because they have some serious cars out there, so I went with their "Turbo" cam.

necrocannibal

iTrader: (5)

Have you been to the track or the dyno to see what is actually happening with the car? Dont base how slow or fast the car is by whether it scan spin the tires in first, turbo cars work differently. My car will barely spin the tires over in first from a roll and it put down 840.

RealQuick

iTrader: (14)

Dyno will be in September. It pulls smooth... just the SOTP meter isnt impressed. What tires you running?

I used to have a turbo 96T/A, different animal, would break street tires loose from a roll in 3rd gear once it hit boost.

MontecarloDrag

iTrader: (3)

Boosted Gen5's are beasts. You need to dial in the tune, it's a day and night difference between a spot-on tune and a conservative one, specially on those cars.

necrocannibal

iTrader: (5)

I am running Mickey Thompson ET Streets so that is part of it plus I have a lot of suspension work done so that is part too. My car hooks pretty damn good for the power it makes.

Redbull87

iTrader: (3)

My car felt like this at first before it was tuned on the dyno. The turbo does seem a lil on a the smaller side but ti should spool rather quick in the rpm range. 7psi didnt really feel like much on the street in 1st or 2nd....3rd though yea it raped tires. My timing is 15* seemed happiest vs 11-13* made a good difference on the street.At 18psi nothing below 4th gear would blaze tires..rolling or not.

7psi is nice to cruise around and not worry about going through tire so dont worry about it. When its dialed in more and the boost is up it will come alive.

Rise of the Phoenix

iTrader: (27)

The initial hit in a NA car like what you had before is going to feel much better than a boosted application will, but as you gain RPM's, the boosted application should feel much stronger the higher in the RPM band you go as boost is being built.

RealQuick

iTrader: (14)

15 at peak tq or 15 at peak power?

93camaro_zzz

iTrader: (13)

Man, your first turbo experience was way different than my first turbo experience. I nearly shat my pants. lol

RealQuick

iTrader: (14)

its my first turbo "LSx" experience. I used to have a turbo LT1 trans am that feels like it would have raped this setup.

Game ova

Turbo cars tend to have that rubber band type of powerband. Without dumping the clutch or leaving with some rpms, my car won't spin till the top of first. From then on its a spin fest, your car seems to be like a typical turbo car. Need to get it to the track and see what it runs like.

gametech

iTrader: (1)

You may be losing 100+hp in "conservative" timing and AF ratio at only 7psi.

Hank Peabody

iTrader: (2)

Not much power in going leaner than 11.0 typically but 4-5* timing could be worth 100wtq. If you had some race gas to put in for safety that would be an easy SOTP test you could do if you're antsy before the dyno.

JoeNova

Your timing is very low for 7 PSI. Are you running stock compression ratio?

93camaro_zzz

iTrader: (13)

I agree with this.

RealQuick

iTrader: (14)

The timing I am running would probably be more appropriate for higher boost (12psi). At 7psi, what would everyone suggest for timing?

RealQuick

iTrader: (14)

stock LS3 CR

93camaro_zzz

iTrader: (13)

I think the correct answer to that question, is the amount of timing that makes the most power. And then minus one if you feel like being safe.