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I was looking at the new summit book and came accros new vortec heads made by summit part# SUM-151124
I was wondering if they are worth the price because I am in the middle of a vortec head swap.
__________________ Teal green 91 RS
5.0 TBI with Auto trans
Z-28 wheels, SS hood, Z28 hi rise spoiler
ENGINE-stock 305 bottom end,Vortec heads 062s milled .030,Proform 1.6 roller rockers, lt1 cam,vortec TBI marine intake, Holley 670 with 305 injector pod w/ AFPR Caprice Police oil Cooler
ECM- chip with EGR & Speed limiter removed, still in need of some tunning
EXAUST-Headman coated LTs, true duals with X-pipe and 2 Bullet mufflers
IGNINTION -Accel wires,coil,cap and rotor, MSD 6AL with ADJ timing control box
TRANS-rebuilt trany w/shift kit,vette servo, SLP stall and trans cooler
Drivetrain-SLP zexel posi w/3.42 aluminum drive shaft, Billet adj. control arms and panhard bar
POWER ADDER- NOS TBI plate system with purge valve and bottle heater
12.839 @ 106.592
1.795 60'
www.competitionproducts.com sells pro-topline "vortec style" heads with screw-in studs, and springs good to .510" lift for $499.
You may want to check them out too.
__________________ '70 Buick Skylark - 350/TH350.
'71 Dodge Challenger - 440/727.
'72 Pontiac Lemans - 350/TH350.
'73 Pontiac Firebird Formula - 400/TH400, (S480 turbo project).
'73 Pontiac Trans Am - 455/TH400.
'76 Pontiac Trans Am - 455/Super T-10.
'87 Ford Mustang LX - 5.0/T-5 (TV8102 turbo project).
Last edited by SOLID LIFTER; 01-07-2005 at 07:15 PM.
Can anyone get some flow ratings or something comparing these heads. These are CHEAP and looking quite attractive as a very near-future buy for my buildup. What is everyones opinions on these and vs. the summit ones.
World S/R Head
76cc Chamber
1.940, 1.500
165cc intake runners
Price: $419.95 ($569.99 assembled)
World S/R Head
67cc Chamber
1.940, 1.500
165cc intake runners.
Price: $419.95 ($569.99 assembled)
The following link has flow numbers for most of those heads, the stock GM vortecs dust them all with ease, I'm assuming the Pro-Toplines would do the same. Would be interesting to see some independent numbers for the Summit and Pro Topline Vortecs though (not on the list I don't believe)
If these heads are actually the same as Toplines I can say I know someone running them and they seem to flow slightly better. I know of two people runing the stocks and the Toplines and the Topline car traps slightly faster so I would say they flow a bit better.
