the guy who did the tune has been tuning for 12 years,advance dyno did not tune my car it was the guy mark he is from sac.

 

wheres Mark shop in sac?

 

Here is your dyno graph from saturday, the blue was the first run and the
red was the last run.

 

Belt slip or pressure leak? Does it hold boost all the way up?

Looks like it was doing good @ 4.25 and on the blue run even up to about 4.75 but kept falling on its face.

I know the tpi won't be a high rpm monster... but that don't look right.

 

I would also say belt slippage/pressure loss.

i would recheck the rockers, take the distributer back out and make sure its not a tooth off.

 

will check the rockers and belt.

 

That motor should pull pretty linear to 6000rpm. You've definitely got some issues.

It doesn't just flatten, but falls hard with rpm and you're losing 100hp in the last 1000rpm when you should be gaining that!

Valve float? I don't think this is a tuning issue.

 

i hope it's not valve float in those heads

 

fuel pump? tape a guage to the windsheild and go for a ride

 

where should the fuel pressure be at.

 

45psi or so @ idle... you may want a 1:1 rise with boost psi

 

If it were fuel pump (or lack of), you'd be leaning out on the top end. Your A/F's on your dyno chart stay pretty solid through the pull, so the fuel is there. Now when you get your issue fixed and you bring that top end power back, i'd keep a close eye on the A/F's then, cause at that point, it might start leaning out once it makes the power again that it should be. I'm with the majority here. Seems like belt slippage. You have a boost gauge? Whats your boost through the pull? See any belt dust around the head unit pulley?

Ken R.