I bet this is getting really rough on ya. When was the date you first gave the keys to Fred?

 

Well i originally paid him and dropped off my block at the beginning of March so going on 9 months now. However my car has been broken and off the road since September of 2010. Originally the car was planned to be complete in May but that clearly never happend.

 

hey sounds like my car LOL.
haven't heard too good of things bout smg unfortunately....i say straight turbo though. there's a reason zzp don't use it lol

 

I would say forget it and pull the car and sue him for not performing the work he was suppose to do. Just send it to ZZP and be done. I would rather see the car on the streets than on the dyno all day

 

just got an update from Fred (SMG). He was unable to work on my car today because he was busy working on another car all day. So still no progress on car.

 

---https://www.cobaltss.net/forums/2-0l-lnf-performance-tech-153/i-am-officially-400-whp-club-thanks-zzp-266337/----
Yesterday this thread was made
On 11-8-11
I'd love to have this car, remove this entire config and give you a reliable, streetable, 500WHP build.

 

^^^^^^^^

 

Trust me if i wasn’t being robbed by SMG with this ridiculous bill my car would have been out of there and in Michigan already.. (probably back and driving by now too) ZZP has definitely been 110% more than helpful in giving me advice on my car and offering me a huge break to get my car together correctly. Ive just spent so much money already (wasted so much money) and owe a bunch now as well so Im in a lousy situation right now where I can’t afford to do anything but wait. What i’d prefer to do is have zzp rebuild my car from scratch but with me being in the hole now it might come down to me just selling all the supercharger stuff out of my car and see how much I can get so I can buy what I need from ZZP to make my car just straight up turbo. Thanks again ZZP for all your help. Should have went to you from the get-go!

 

sad story kangol. Wish you the best and hope it turns out okay 4 u.

 

Thank you, I appreciate it.

 

Well he found a big boost drop from the turbo to the intake manifold. It would spike to about 36psi at the turbo and the highest it would get at the manifold was 28. Found a small leak on a rubber nipple off the intake and replaced that and it gained 8hp. Still a drop though. He replaced all t-bolt clamps and couplers. He checked and replaced all o-rings, checked all gaskets and all look fine. He even eliminated the turbo and took off the wastegate and tested it with blower only and with just the blower there was a boost drop. Went to about 11-12ish then slowly kept creeping down. So that eliminates the charge pipe and turbo setup. Anyone have any ideas where this boost drop could be coming from?

 

wow 8 psi boost drop.


about 60 - 90hp loss right there........

 

i would do a leak down test and a boost leak test and check the check valve in the intake manifold because if it cant hold the pressure it will start to bleed off pressure and you also need to vent the valve cover with a -10 vent

 

If I understand what you're saying correctly, it would be the blower and intake/IC

 

the exhaust pipe to the turbo is a energy radiator. the turbo is trying to recover the heat and motion of the exhaust as it leaves the motor, when you went to the bigger pipe several things happened, the surface area of the pipe went up considerably and the speed of the exhaust flowing through it went down meaning it had longer to cool in the pipe. header wrapping the exhaust all the way to the turbo will help trap some of the heat inside it, may gain back some of the power loss.

 

So far he has been swapping part by part. All gaskets have been replaced, supercharger was swapped to check, meth spacer was checked, all o-rings replaced and no luck. The strange thing is this boost drop never occurred while I had the 2.5” exhaust.

 

Exhaust gas velocity... I had a similar problem with my first exhaust manifold setup.

What turbo are you running in the rear again?

You're running bigger than 2.5'' back to the turbo?

 

higher flowing exhaust will lower the boost usually

 

Right now the turbo is not being used. The waste gate is out and we are getting boost drop with the turbo alone. I'm still confused on why a larger exhaust would cause boost drop. I mean I understand I'll lose boost all together with having more flow but why would I lose it while under acceleration? During wot it reaches to about 12 then starts dropping down and we let off it once it gets to 8psi. This is with the supercharger alone.

 

Is there any type of boost control device still connected to the blower bypass valve? Where is the boost gauge connected? Is it T'd in with other components? Is the boost drop verified by the MAP sensor reading?

 

You dont happen to be missing most of a piston do you? Aka how is your blow by.

 

He removed everything from the bypass valve. Boost gauge is connected to the intake manifold. It was verified by the MAP sensor reading. We also used both electronic and mechanical boost gauges.


You dont happen to be missing most of a piston do you? Aka how is your blow by.
We performed a compression test and all cylinders were around 150ish

 

So there is nothing connected to the bypass valve? Or it is hooked up like a stock setup?

What type of intake is connected prior to the supercharger? Or are there charge tubes in place?

 

unless you dropped the compresssion with different pistons that is low

 

thats what I was thinking