Ok, I am tuning a friends STS 35thSS. I know **** about turbo tuning, so I dropped timing and added assloads of fuel for safety and have been dialing it in slowly..so far so good. Without Meth I found the IAT vs advance to be a nice 02' PCM function, at 155* IAT.

Under the runs, we found the oil pcv breather or vent to blow some oil out? Its the little plastic item with a breather foam in it that the PCV breaths through. Any suggestions or is it normal?

so far: 13.3 @ 106 2.18 60' (needs traction to build some boost off the line!). again only at 5psi now without Meth.

Charlie

 

If you are talking about the breather on the far side of the solenoid, THAT is your crankcase vent when you are operating under boost. I don't think it should blow oil out, though. Just get a little oily over time. If you it is actually blowing oil out, are you sure you have the breather and solenoid properly connected? Sounds like [maybe?] you are blowing boost INTO the normal crankcase vent, and blowing it back out through this?

 

Don't LS1 f-bods trap at like 106 stock?

 

Yes, but you need to realise if thetune is way of like he said it was, it can make the same HP with boost that one tuned makes N/A. When we do tunes on these type of cars, they start real low and end up real high when we are done, average WHP is around 420ish from the base kit when finished.

-Bryan

 

I got 430 rwhp out of my base kit after I tuned it pretty good. Now the config has changed a little and i'm at 625

The power and reliability is all in the tune. I've picked up 2-3 mph at the track by simply changing the timing curve a little.

 

Stock this A4 trapped 102mph in HI, IIRC. Not sure on if he has the breather and solenoid routed correctly, seemed fine driving until return from a run, noticed a little misty oil blowing out from there. Will have him double check (my right hands been broken so no wrenching for me x 2 more weeks!).
I did bump up the timing and leaned it out some and it picked up mph, to the 106, but scared to go further until his meth is hooked up...155*+ IATs aint no joke, luckily I had the IAT vs advance to pull some more timing out, so I am elarning quickly.
Also this kit is the T67 not the 60.

Tell me if this is right, the boost controller wasnt hooked up, so he said it would be "stock setting" not sure but he mentioned 5psi? On the turbo mounting there is one vacuum bung hooked up, and the other one off the WG is not? Thats if I remember correctly...sounds odd to me. Anyway, he's trying to finish the boost controller and the meth today, hopefully please!
Thanks

Charlie

 

That is correct. With the boost controller not hooked up only one of the lines will be hooked up on the wastegaste. You use both of them with the boost controller. The MPH is way off though. Should be around 114 or so at 5psi and around 118-122 with 10psi depending on the tranny setup. I run my timing around 14 degrees at 5psi. Makes 407 @ 5 and 514@10 with meth.

 

Cars normally trap way slower here from the DA and this one is by no means dialed in. I started around a 10:1 AFR and 8* of timing, and have barely leaned it out any and only got the timing to ~15* but after 4 runs, and realizing stock plugs need to go away!
Thanks for comfirming the wastegate line.

Charlie

 

I have contacted Squires about the PCV wiring. There instructions showed 3 wires on the harness but there where only two. I had to take advice from a guy on here with a GTO and run a piggyback wire to the solenoid from the pressure switch. Squires still has yet to answer me back. It is blowing a small mist of oil in the engine compartment.

 

As the 'guy with the gto', it sounds as thought you may have the solenoid connected wrong...that is, the plumbing part of it. This should be CLOSED between the boosted intake side and the crankcase when the switch is armed.

Now, the other thing: these cars apparently have a tendency to blow a lot of oil into the pcv normally. Over on the LS1GTO board, there has been a lot of discussion of catch-cans, even on NA motors. I installed one into the ventilation on mine, so there is a trap before the pcv.

Also, others have reported that they have seen a lot of oil out of that little plastic breather. One fellow posted pics of a breather that looks like a tiny air filter that he's using w/ his STS as well.

This setup is NOT a function of the STS, but of ANY boosted engine needing the pcv closed when the car is operating under boost. If there is a check valve (one-way valve) then it's not an issue. These engines don't appear to have that checkvalve, hence the solenoid to close it.

Suggestion: remove your breather lines, and verify that it is normally open between intake and crankcase; also, verify that the solenoid is working (simply apply 12v to the terminal and listen for the 'clack' sound). Wouldn't be hard to simply wire a little 12v light on a bit of wire, run it out the side of the hood and into the car. Verify the light comes on when under boost...can't think of an easier way to test. IF your system is properly wired at the pressure switch, you'll have 12v when you hit boost. That will:

*switch the oil pump relay, so it runs on 'high' [that is, routes AROUND the big resister w/ the heat sink]
*close the solenoid on the PCV

Take a deep breath, step back and think your way through this. It's really not very complicated in function, just think through each step, verify that each area works (pressure switch providing 12v signal; plumbing; solenoid; oil pump.

 

MTBDOC (whats your name?), thanks. Hopefully he'll verify that as well as get the Meth working roday.

Charlie

 

Some even trap 109 but on the avg 106 sounds about right. 2 weeks ago I heard a guy with an LS1 GTO trapped 79 in the 1/4 with an STS kit. That is just wrong, besides he had big injectors and it was rich as a pig.