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So that's 8, 10, 11, 12, and 13 from the diagram? Can you post the part numbers?

Yes, thank-you but 13 just looks like a line with a simple check valve in it and at a cost of $48. And, from your post, 13 cannot be used "as is" because of the physical distance differances between...

OK, so we got the new LHU into the Cobalt and the car is running absolutely great. Right now we have the stock tune in the car with the exception that we have made the minor changes as we are...

How did you connect the pump? Did you simply "T" it into the vac line to the brake booster? Is a check valve needed?

I should have been more clear. So far we have the vacuum booster still installed but we left it's nipple capped off - just how it was shipped. As we don't foresee using/needing the pump in a Cobalt...

We just finished the install of the LHU into our Cobalt SS yesterday and our LHU has the pump. We have so far just left it capped. Not sure yet if we should hook it up or order the part(s) that may...

Just an update on our expensive lesson. We got the LNF head over at a machine shop. They have it torn down and it looks like only the two intake valves in cylinder 3 will need to be replaced. Will...

The turbo is fine - turbine fins on intake and exhaust side both fine (whew)! We have a brand new GM Engine arriving Wednesday. We will install that and get the car back on the road (errr, back to...

Well, with the engine removed the head wasn't too bad to remove. On te bad side, a pretty big chunk of piston is missing. The good news is that the cylinder wall and the head/valves all appear...

Dropped the engine and trans out yesterday. We will finding the damage later today I suppose..... Ugh.

Well, we got the car back today and were able to perform a little more diagnosis. No compression at all in cylinder 3. The borescope was inconclusive. I guess we're are going to pull the entire...

Here's a pic of our Sol Coupe.

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We REALLY like the track at Spring Mountain.... and the staff, and the clientel, and the accomodations, etc. We (me, my 22year-old son and my 19year-old daughter) had the opportunity to drive the...

cobaltssoverbooster - Everything you said makes a lot of sense and we will follow your advice. Absolutely agree on boost limits on the road course - especially in a hot areas like Pahrump, NV...

Guys, ALL input appreciated! Yes, the car DOES have the 3 bar MAP sensors in it (we installed them before starting the tuning).

We have too many cars and I bought this one to be my reliable track...

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I would really welcome ANY input, suggestions you may have!!!!

Embarassingly, I think we've encountered a pretty expensive lesson as a consequence of poor tuning.... We've had great success tuning our 2009 Solstice Coupe and have now tracked it several times...