Grumpy Im looking to build a performance 283 SBC, and the 2.02 fuelie heads I found won,t clear the smaller bore walls
283 -bore 3.875"
350 -bore 4.00"
The 461 fuelie heads were the first heads to use the 1.94/1.5. These heads is where the term "FUELIE" heads began. These heads ONLY had the 1.94/1.5 valves through 63,and were used on the dual quad and fuelie 283-327 corvettes ,then in 64, when the 365hp(carb) and 375hp (FI) 327s were produced, the 461 heads were opened up to accept the now famous 2.02/1.6 valves.
if your not too concerned with keeping it original, the 175cc port trickflow aluminum heads fit the 283 sbc and significantly out perform the stock fuelie heads
http://www.summitracing.com/parts/tfs-30310002/media/chartsandguides
http://www.summitracing.com/parts/tfs-30310002/applications/engine-size/4-6l-283
http://static.summitracing.com/global/images/chartsguides/t/tfs airflow super 23 175 2014c.pdf
http://garage.grumpysperformance.co...ed-up-fuelie-heads-for-cheap.2099/#post-50526
pdq67 said:How far can I flat mill my old big valve -291's, 66 cc chamber heads?
Same with angle milling them?
I want to install a 50 cc chamber head is all.
Should I just install either 1.94" or 2.02" intakes and 1.60" exhaust valves in my old -601 heads, open them up and then flat mill them back down to 50 cc's?
Money is always tight or I would buy new heads so this is why I ask.
Thanks in advance for any comments.
pdq67
Im placing this here because matching the heads used too the selected cam duration and lift, and engine displacement, is critical to getting good results,yes I'm all too well aware that moneys darn hard to come by, but I'm also pointing out that theres far more effective choices than re-machining and adding larger valves too 30-60 year old cylinder head designs and the cost required to upgrade them significantly!
THINK THINGS THROUGH!
short answer, any time your thinking about spending cash on major components, just step back and think things through carefully, what will it cost and what can you reasonably expect to gain from the money spent?
will the new parts match and work well with the other components?
will the combo work with my cars drive train gearing?
will it work with the octane fuel I will use?
can I get replacement parts in a few years?
can I spend a bit more and get significantly improved performance for the extra cash outlay?
601 heads, or any of the old small valve OEM fuelie heads are by todays standards, are at best door stops, that would be a total waste of financial effort, to upgrade simply because by the time they were modified enough with port work and bigger valves, to even come close to the flow rate of aftermarket heads the cost will be very prohibitive, getting the heads that were designed to produce decent low and mid rpm torque on a 305 to flow even as well as mildly reworked vortec heads is unlikely
Start adding up what you will potentially have in a set of basic 305 heads if you were to start throwing cash at them in the basic hope of improving them
Heads from junkyard
Having them hot-tanked
Having them re-surfaced
buying new valves
having larger hardened seats installed
getting a multi angle valve job
getting the heads machined for larger valve springs
Having the valves ground
New Springs
New Retainers
New locks
Tapping them for screw in studs if you are running much spring pressure
New guides if they are worn out
Regrind the valves for a 30 degree back cut
Multiple Carbide burrs for porting
Multiple drum rolls for polishing
example
http://www.steveschmidtracing.com/machine-shop
Machine Shop - Labor Prices
Head Work
V-8 Valve Grind (Pr) $120.00
Pro Sportsman Valve Grind & Blend (Pr) $250.00
Competition Valve Grind (Pr) $350.00
Grind Valves (Set) $ 40.00
Back-Cut Valves (Set) $ 20.00
Surface Heads (up to .020) (Ea) $ 25.00
O-Ring Heads (.041 wire) (Pr) $120.00
Cut Heads for Loc-Wire (Pr) $120.00
Cut for Teflon Seals (Pr) $ 32.00
Cut for Large Springs (Pr) $ 32.00
Mill & CC Heads (Pr) $100.00
Clean Assemble Set Spring Height $ 80.00
Cut for Seats (1st seat) $ 30.00
Cut for Add'l Seats (2-7) (Per Head) $ 20.00
Hone Guides (Ea) $ 2.00
Install Guides (Ea) $ 5.00
Mill Int. or Ex. Side (Per Surface) $ 5.00
Angle Mill Head Correct Int. Side & Ream Head Bolt Holes $200.00
Clean Heads (Ea) $ 20.00
Custom Machine Work (Hr) $ 60.00
fact! it will be much more cost effective to sell those heads and buy a decent aftermarket head design, that will significantly out flow the ported 601 heads, plus have alot more features
yeah I know not 1/4 of the guys will read through the linked info, but that group is far more likely to have a fast car later as a result
http://www.summitracing.com/parts/tfs-30310002/media/chartsandguides
http://garage.grumpysperformance.co...u-buy-bare-or-assembled-heads.534/#post-27236
http://garage.grumpysperformance.com/index.php?threads/milling-heads-and-intakes.2988/#post-9055
http://www.hotrod.com/how-to/engine/ccrp-1209-eight-budget-sbc-head-shootout/
http://www.stockcarracing.com/techarticles/scrp_0801_budget_racing_engine/
http://www.superchevy.com/how-to/engines-drivetrain/sucp-0705-budget-chevy-cylinder-heads/
http://www.superchevy.com/how-to/en...e=cxrecs&cx_navSource=related-bottom#cxrecs_s
http://garage.grumpysperformance.co...ed-up-fuelie-heads-for-cheap.2099/#post-50526
http://garage.grumpysperformance.com/index.php?threads/unleaded-fuel.11498/#post-52990
http://www.ws6transam.org/ported.html
http://www.strokerengine.com/SBCHeadsFlow.html
http://garage.grumpysperformance.co...olishing-combustion-chambers.2630/#post-48319
http://garage.grumpysperformance.co...at-angles-and-air-flow.8460/page-2#post-32923
http://garage.grumpysperformance.com/index.php?threads/whats-a-valve-job-cost.8596/
http://garage.grumpysperformance.co...-old-heads-in-the-scrap-bin.10728/#post-46832
http://garage.grumpysperformance.co...king-piston-to-valve-clearances.399/#post-488
http://garage.grumpysperformance.co...g-vortec-heads-and-other-heads.401/#post-7853
http://garage.grumpysperformance.co...u-buy-bare-or-assembled-heads.534/#post-27236
http://garage.grumpysperformance.com/index.php?threads/sellecting-cylinder-heads.796/
http://garage.grumpysperformance.co...e-springs-and-setting-up-the-valve-train.181/
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