Something is fishy here. With a 60' of 1.8 and a trap speed of 120, the et should be lower. It almost sounds like your tune is pulling too much timing. Do you know how much total timing you are running? Stock cobras trap around 110, so you are certainly getting more hp. Also, is the clutch stock? How many miles are on it?

 

Here are my buddys mods and he has run an 11.8 on a really crappy track...

Performance
Mac prochamber h-pipe
2 chamber flows
Predator
2.80 psi blower pulley
Accufab Big Oval Throttle body
3 90mm billet Idler pulleys
Cold air kit
Pro 5.0 shifter

Suspension

Eibach Pro Kit Springs
Hard Launch Cross-Bar
IRS Bushings
Billet IRS Girdle Cover

 

I agree with Birdie and Jdan, the tune is suspect. Hand helds are not the best type of tuner, you need to get a real dyno tune. As for what kind of dyno is used, it does not matter (unless you just want to brag about hp numbers). A dyno is just a tool to help you get the car tuned and it is more about the gain in hp/tq, the A/F ratio and what the power curves look like

 

my belt does slip a little at higher rpms..you can see it on the chart..and around 5300rpms my boost gauge starts going back down? it dosent stay peg'd out..and yeah i need to spend a little more time at the track and get some slicks because i start hopping in first gear and when i hit second it will almost get sidways with me..I tried to do a burnout and it starts hopping extremly bad..im about to just dump this diablo sport and run 100 octane and see how that goes

 

.

 

Try resizing that and posting it again. 100 Octane isnt going to help you at all. Im at 650 rwhp and I still race on 93 octane and drive daily on 93 octane.

 

try this one

 

Nope... still too big to see the chart.

 

i clicked on it a bunch of times and all of a sudden it resized.... i saw the chart and it looks alittle crazy... how are your air/fuel ratios up at those rpms, did it get alot more rich?

pretty much... his power curve drops like a brick alittle above 5k rpms... it drops as fast as it raises. it looks like a mountain.