The incredible W-2/355

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Brooks James

Brooks James

VET, CPT, Huey Medevac Pilot
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July 77
I thought 355 were 360 destroke
What Did the heads flow stock ?
Heads fully ported, dressed ?

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I didnt know they ran mushroom lifters. Stroked 340's for bigger piston area.
 
Jegs has them in iron $650 each bare. Im sssuming the cost of the rockers. Pushrod, Springs . , Valves, would make it more worthwhile to by a set of Trick Flow
 
355 is not a destroked 360! no 360 parts on it. It's a slightly stroked 340, think the crankshaft was around 3.45 something stroke.
 
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Trickflowheads are not even in the same ballpark as a W-2 comparable as cast yes, but you're comparing a stock location push rod to a relocated push rod head no real comparison after a Max Porting job.
 
The 355 was developed for the 360 cubic inch circle track racers. And was quite dominant in its time.
 
Brooks James said:
Jegs has them in iron $650 each bare. Im sssuming the cost of the rockers. Pushrod, Springs . , Valves, would make it more worthwhile to by a set of Trick Flow
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I’ll take the W2 over Trickflow. The W2 is a proven head and still going strong after all these years.
 
What a lot of people don't realize is the 355 W-2 motor won lot of big races including Sprint car world championship I think was kinzer behind the wheel and Richard Petty used the 355 and I believe it was 1979 and won NASCAR races most people thought he was still using a 426. And countless other wins at circle tracks
 
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*I Think* the W2 was introduced in ‘75/‘76.
 
Brooks James said:
Jegs has them in iron $650 each bare. Im sssuming the cost of the rockers. Pushrod, Springs . , Valves, would make it more worthwhile to by a set of Trick Flow
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Unless you have a time machine you’re not getting new W2 heads from a commercial vendor.
 
Brooks James said:
Theyre cast iron repops
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No one repop a W2 heads. Don’t know how the hell you thought that one up!
Brooks James said:
48 degrees, educate me pls
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Lifter angle change from 59*’s in order to straighten out the pushrods for geometry correction on the whole system. You also get more out of the camshaft lobe directly translated. The problem is expense! It’s huge!
 
I just looked them up again
Jegs, w2 cast iron heads, $656 each. ill call them
Update
Currently out of stock for 59 degree blocks
With standard cam
65 CC chamber
Mopar performance 5249769
$656
Im sure Ill be shocked at the price of the heads valvetrain when i look it up

Update, crazy money for Valve, , springs, rockers, pushrod. PLUS a pro to build them. Looks like Ill porting my stock magnums, paying with sweat
 
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Stock W2 heads are still available from private owners and I see them often. There is even a Facebook group for W2’s. Heck I have a buddy that has two brand new W5 heads that he will never do anything with. And the stock econo W2 heads I flow tested went 260@.450 then fell on their face. With the stock valves I easily had them up over 300 cfm and ran 9.80’s in my duster with a .520 Racer Brown solid lifter cam on pump gas BP93. They cracked after three years of use.
 
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