Pro Topline 220cc 64cc aluminum heads
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Location: Westminster, MD
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Category: Engine - Intake/Fuel
Price: $750
Part Fits: 67-92 Chevrolet Camaro, 67-92 Pontiac Firebird
Location (State): MD
Item Condition: Brand New
Shipping Information: Item Can be Shipped
LS Engine?: Non-LS Part
$750 shipped, retailed for $1400 new.
Stainless valves (2.02/1.60) with Comp Cam BeeHive springs (matched to comp cam 276HR w/ 1.6's, .540 lift total), straight plug. The accept center bolt & perimeter bolt valve covers. Engine currently has forged flat tops so it's close to 10:1 compression and with plans to upgrade my supercharger, I'm looking to lower my compression with a set of 75cc or so heads. Also, Pro Topline recommended these for 383 & larger engines, mine is a 355 so also looking to downsize to a 195cc. I did just have them cleaned & pressure tested and machine shop said all was fine. Only issue found was a small ridge around around cylinder 8 which is most likely from detonation, see last pic (PO was only running 30# injectors & never properly tuned the car). For a n/a engine, this shouldn't be an issue. If it's a concern, they can be milled & you'll get a little more boost in compression.
Head flow numbers: (as advertised from pro-topline)
Intake Port Test Data @28" of water
.100 .200 .300 .400 .500 .600 .700
70.74 146.41 203.72 249.84 260.51 268.51 276.41
Exhaust Port Test Data @28" of water
.100 .200 .300 .400 .500 .600 .700
56.90 100.99 156.94 176.85 186.34 190.13 194.87
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Last edited by ed1le; 03-09-2012 at 07:43 PM.