hey.......as you can see in the sig i have some old gm 186 double hump 2.02 heads. all i have really done to them is gasket match it with the inake to the gasket and alot of pocket porting under the valves (lots of excess casting material under there) and polish the exhaust ports. the thing really screams as is and i love the power it has......but i have the chance to pick up a set of dart iron eagles for about the price of one head from say jegs or summit. they are the 215cc runners with 64cc chambers and 2.05/1.60 valves. what kind of gains can i expect from the upgrade? thanks.

Rich

 

ran both on DD2000 and got this:

current config. darts:

360 hp @ 5000 442 hp @6000
410 trq @ 4000 430 trq @4500

these numbers may be a little off but I think I'm close.

 

i got no difference when i used the air flow file for the darts and the "low performance, ported, large valves". but i know that has to be wrong.......also when i put in every single asect of my motor with the iron eagles i got this 479hp @ 6500 and 443ft/lb @ 5000 rpm..............with "low performance/ported, large valve" (figure that is what you'd use for production heads) i got 474hp @ 6000 and 442ft/lb @ 5000


something just tells me i should have a bigger gain going from a set of 1969 production heads to the darts.

 

how do you guys post the images from desktop dyno in here????