My $59 problems/tuning a turbo camaro

[Six_Shooter]

If the only thing really wrong with it is the head gasket fix it. gen3 top ends are cheap and easy to get.

If you lived closer I'd give you a bunch of gen3 top end parts. I have like 4 sets of heads that I'll likely never use.

[fasteddi]

There harder to come by up where i live. The junk yards arround toledo are horrid. The last place I checked for a gen3 top end, they wanted 350 bucks for what i needed and I needed to take it apart. I thought that was a tad steep.

[fasteddi]

sixshooter I do have a tuning question for ya...

What exactly triggers the boost silenoid. I cant wrap my head arround that If there is 12vdc at the silenoid that it wont trigger. How is the ground from the ecm regulated? Does it pulseate off/on for the DC? Reason being that I once again have boost issues. Its not the silenoid this time though. It triggers on when I apply straight 12vdc from the batt. But as I see I have 12vdc at the conector. I also see that I have nothing in the bin that is wrong. Thats with the ignition on. What is the difference when the ecm triggers it? Thats what I just dont get. Thanks for being patient with my newbie question. I feel that if i understand how it works better I can find the problem better.

[34blazer]

There harder to come by up where i live. The junk yards arround toledo are horrid. The last place I checked for a gen3 top end, they wanted 350 bucks for what i needed and I needed to take it apart. I thought that was a tad steep.

pull a part is the best resource for a GENIII topend. you might have to bite the bullet and drive to clevo, because there isnt much else on the north coast(for pricing/availability).

[Six_Shooter]

The ECM controls the boost control solenoid by applying a square wave pulse at varying amount of DC (Duty Cycle). The higher the DC, the more on time of the solenoid, blocking the boost pressure from getting to the wastegate actuator. The ECM triggers on the ground side of the solenoid. What you should see is 12VDC on both sides of the solenoid, with it plugged into the solenoid, much like you would see at an injector, with the key on but engine off.

As far as what will cause the ECM to go into closed loop boost control, there are a couple thresholds that need to be met, in order for the ECM to apply that ground signal to the solenoid.

I don't have time right now, but in a couple weeks I will be done school for this semester, and can take some time to hook up my test bench again and find some settings that will be able to be used to confirm ECM control of the boost control solenoid.

If you're ever near Niagara Falls (Canadian side) I will meet up with you and give you some of my gen3 top end stuff.

[fasteddi]

For me to get there its 4 1/2 hrs but I dont have a passport.


Ive checked and I only have 12vdc to one side of the sileniod when the key is on the car is off. Ill look at my wireing some more. Thanks for helping me learn how this thing works though.

[fasteddi]

Heres a datalog of the 13.50 pass only. Just WOT areas. In case anyone wants to see it. The turbo lag isnt nearly as bad as last year even though this turbo is much larger on both the turbine and compressor.

[RobertISaar]

what gears/weight/tire size are you running?

i've got this plugged into virtualdyno with some pretty reasonable looking results guessing at your setup using the info in that log during 2nd gear.

[fasteddi]

3.73s in the rear. 26 inch tires. 3250lbs race weight.

[RobertISaar]

is that with or without you in it?

either way, good numbers are coming out.

[fasteddi]

Thats with me in it. I tried to download that software and it no work-o. The page says its gone.

Hard for me to believe good numbers are comming out when im getting like 25% drive train loss on my crappy 700r...lol

[RobertISaar]

IIRC, virtual dyno does a wheel torque/HP calculation, so apply that correction if you want to get an estimate on engine specs.

and by good, i meant entirely realistic looking. seems like you might benefit if the trans held a gear longer too? HP and torque still appear to be rising at the ~6K your trans is shifting at.

http://i.imgur.com/AOU16CL.png

193/178. if there is a 25% loss through the trans, that's 241/223... that's a solid 100HP bump from the stock engine.

[RobertISaar]

http://virtualdyno.net/

and there's a link that works... not sure why google only find the old version that isn't hosted anymore.

[fasteddi]

I got it to work but the numbers look all goofy.

[RobertISaar]

goofy, how? really out of scale or just all over the place? if they're all over the place, make a different copy of the CSV, leave ONLY the parts that are in a single gear. when the gears change, that causes issues with the way it uses data. i chose 2nd since you topped out in it and not in 3rd and 1st goes by way too fast.