Yes and the reason is the car won't hold boost. It drops as soon as it spikes. It's at 26psi at 3600 rpm and back to 19psi at 4600 rpm

 

Did you check for boost leaks? Mechanical issues?
It seems you made a good improvement so you got what you were supposed to get from the tune, but if there are other issues it will not make what you expect.

I think the #s are on the lower side of average, but I do so many cars I get to see what parts selection, boost leaks and incorrectly installed parts can do to the #s.

I wouldn't jump to conclusions and blame Chad, he knows what he is doing. I would ty to work through the issues and find out what the problem/problems are.

Sean

 

Also, if at 4500 RPM you are already down to 20psi how do you expect to make any power?
You should be holding boost alot better than that.

How did you test for boost leaks?

Sean

 

A GM will hold boost better up top on a stock turbo.

 

How do you know it's a bad tune..............?

I don't get it.

Sean

 

theres ALOT of factors....gear, dyno, air temp, just to name a few....and for that matter the stock numbers seem REALLY high! it should be like 230 at the most!....if this was alreadt said im sry i didnt read all 4 pages.

 

Boost dropping that quick is an issue. Look there first. You have an obvious problem there if it drops to 20 as soon as it hits 26.
Does the torque go down with the boost?
Do a compression test also.

 

Compression test is next and my mbc IS working properly. Temp at time of dyno was 84 degrees

 

Nevertheless, that IS a very week dyno report. I made more than that with a VIII on a Mustang dyno untuned with afrs into the 9's. But that was before ECUFLASH

Anyhow, 305 wtq at 19 psi near peak VE (4500rpm) means that car is capable of 405 wtq at 28 psi near peak VE.

 

Boost leak test was done by inserting the tester into my intake tube and then clamping it down and then using an air compressor to push air through the whole system

 

I know my wga isn't working properly after talking to Buschur but I still think I have some other problem such as a weak motor maybe. I should know by tonight after the compression test is done

 

I dont but it was just a thought. Suggesting it in the first place was dumb on my part. Especially knowing where he peak power is and the boost its holding.

 

Compression test done at operating temp was 130, 140, 140, ? Cause we couldn't get the 4th spark plug wire pulled out. Damn thing was seized in there or something. So that's prolly my problem. Not to mention that we could hear pressure leak out of the left coil pack when we loosened it. Not a good sign

 

terrible power for mods. Very safe a/f ..wastegate may not have any preload on it.

 

You gonna rebuild, or trade greg? I know you said you were gonna trade if it needed motor work. What is this, evo number 3? Lol.