MOTION35

i have a 540 bulldog . thinking of putting dart pro1 heads cnc ported are they worth it.

niceguy

Cylinder heads and a matched cam are what make the power in an engine... of course the other things like manifold and induction will make a little difference too. But the main power builder is the heads and cam.

Every situation is different, but adding better heads and cam can add anywhere from 50-150hp depending on a lot of different factors... hell maybe more???

Just adding the heads alone? Again each motor is so radically different, but my guess would be a 10-75hp addition.

MOTION35

I would be changing from merlin heads to dartpro1 cnc ported heads . i already have dart intake and dominator carb.

DareDevil

Keep the MERLIN !!!!!!!!! They are a real good head,,maybe get them flowed and ported. To gain a little more.

BenPerfected

Before you buy, talk to Jim Valako (OSO JimV). He can out preform the Dart CNC program. He will use the Dart Pro 1 intake and then do his own port work. Significant improvement...especially on the exhaust ports. It is worth a phone call.

Rebel_Heart

Big difference in power with 540s. It will cost you however. I put mine on the dyno with Dart Pro One aluminum heads and then after Jim V did his magic. Just in his porting, same head I picked up considerable hp.

niceguy

What is considerable power, just out of curiosity?

BY U BOY

Dude you will have enough HP when done

Rookie

Give JimV a call, he can work his magic with those Merlins also. If your not going for just the weight savings of aluminum, it might be cost effective to have Jim work your Merlins. I am running his "Wedged" Merlin heads on my 468's and they make great power. It is worth the call just to talk to him.
Jim Valako 616 889 0928

JimV wedged Merlin compared to a non-wedged Merlin

niceguy

Not for me freak of nature....

I am just curious since he dyno'd a before and after port job without changing anything else.