Trick Flow 440 heads, The Real Deal?

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MRL Performance

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Oh yeah, these are nice! Here are the pics. I will flow them soon, but look great. So upon inspection here is what I found

Full CNC ported ports and chambers
Real valve seals
Spring seat locators, not just shims or cups
Nice valves with a Good valve job, and back-cut on intakes!
Nice PAC springs
Clean castings
Nice chambers, checked in at 78cc
Very thick intake runners, Can go MAX WEDGE!
Lots of pushrod clearance
Super nice machine work

Take a look!
 

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wow, those look nice! maybe a polish on the exhaust side...? Nice to see some aftermarket heads that are quality.
 
More pics
 

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pishta said:
wow, those look nice! maybe a polish on the exhaust side...? Nice to see some aftermarket heads that are quality.
Click to expand...

Maybe, but it might not help make any more power, they look real good. I will have flow numbers soon.
 
I'm glad you like them! I just got a set myself! Any input about the minimum bore requirements? I plan to put thes on my 383.
 

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they are not raised port but they are really thick in the ports and "could" be opened up to MW size
 
Younggun, we put stealth heads (2.14 1.81) valve on a stock bore 383 with .557 Mopar cam and the valves touched the bore.
You may have to notch the bore like they did on the max wedge motors. Maybe someone else will chime in
 
MRL thanks for the pics and look forward to the flow numbers. Wish i had the money and my big block dart. I would like to of seen how they would compare to my very mild bowl ported Indy EZ heads?
 
younggun2.0 said:
I'm glad you like them! I just got a set myself! Any input about the minimum bore requirements? I plan to put thes on my 383.
Click to expand...

WIth the size of the intake valve and the size of the chamber you need a 4.320"+ to make it work. I don't think it will fit the small 4.250" 383 bore without issues.
 
From trick flow's site.
PowerPort 240 Airflow Results
Lift Value Intake Flow CFM Exhaust Flow CFM
.100" 78 58
.200" 154 130
.300" 230 186
.400" 282 222
.500" 310 243
.600" 326 253
.700" 334 262
Tests conducted at 28" of water (pressure). Bore size: 4.350"; exhaust with 2" pipe.
 
PowerPort 240 Cylinder Head Specifications
Combustion Chamber Volume: 78cc CNC-profiled
Intake Port Volume: 240cc CNC Street Ported
Intake Port Location: Stock
Intake Port Dimensions: 2.270" x 1.230
Intake Valve Diameter: 2.190"
Intake Valve Seat: Ductile iron
Exhaust Port Volume: 74cc CNC Street Ported
Exhaust Port Location: Stock
Exhaust Port Dimensions: 1.250" x 1.650" oval
Exhaust Valve Diameter: 1.760"
Exhaust Valve Seat: Ductile iron
Valve Angles: 15°
Valve Guide Material: Bronze alloy
Valve Seals: Viton® fluoroelastomer canister
Valve Seat Angles: 45° x multi-angle
Valve Spring Pocket Diameter: 1.615"
Valve Spring I.D. Locators 1.300"
Valve Spring Retainers: Steel or titanium
Valve Stem Locks: 7° or 10° steel
Valve Springs, Standard: 1.460" o.d. dual spring with damper
120 lbs. @ 1.900" installed height
394 lbs. @ 1.175" open
390 lbs. per inch rate
.650" max. valve lift
Valve Springs, Optional: 1.550" o.d. dual spring
138 lbs. @ 1.950" installed height
430 lbs. @ 1.250" open
420 lbs. per inch rate
.680" max. valve lift
Rocker Arms: Roller rocker arms recommended
Minimum Bore Diameter: 4.320"
Spark Plugs: Autolite 3924
 
So you mean to say that someone is actually offering an aluminum head that the first mod is not throwin the springs in the garbage?
 
MRL Performance said:
WIth the size of the intake valve and the size of the chamber you need a 4.320"+ to make it work. I don't think it will fit the small 4.250" 383 bore without issues.
Click to expand...

Summit application chart show the head working on a 413 @ 4.187 bore.
 
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