At the dyno shop now.....Problems

[Mustangr]

My friends stang that is fully loaded with things like R block AFR 205 Heads mondo vortec is falling on its face at 4800 rpm. 467 hp.
We have taken off blower belt to see if it was blowing out spark, we have tried lots of timing and fuel curves we have even replaced coil.

Any Ideas????

 

[bubba-dough]

pegged MAF, blown headgasket (actually had this happen to us once on the dyno, cylinders were half full of coolant)...

 

[blackened88lx]

What chip is in the limiter haha. Dumber things have happened. When you say "falling on its face", is it breaking up? just not climbing any more? quitting all together?

 

[Mustangr]

We thought of the chip. we also are wondering about being corked by squirls. MMmmm

 

[blackened88lx]

So did you check the chip in the limiter? or just think about it...

 

[Mustangr]

yes, we did. we deleted the aftermarket box completely, we also used another coil, different computer, cannot be pegging MAF because without vortec we only made 250 hp. we are not running out of fuel cause on our dyno the A/R stayed 12:1 till 6500. we have changed timing all over the place.

We are stuck

 

[S&B]

is the belt slipping?

I had this problem once, now i have mine strung tight like a guitar and it climbs right up to 23psi 8 rib

show us some pix of your setup

 

[fiveohwblow]

is the belt slipping?

I had this problem once, now i have mine strung tight like a guitar and it climbs right up to 23psi 8 rib

show us some pix of your setup

Good call s&b. Happened to me as well at 5100 until I tightened.

 

[Gearbanger 101]

Valve float?

What are his cam specs? Not sure what the 205's have for springs?

 

[bentley429]

What is it using for a computer and tuning.