if you can afford to get into a rebuild, you really would benefit from upgraded cylinder heads,
power increases are almost always
directly related to increased efficiency in increased air flow and fuel flow rates,
you can't burn fuel without that increase air flow into and burnt exhaust gases flowing out of the exhaust, the stock GM crossfire intake was designed for the 305 displacement SBC to maximize lower and mid rpm torque, thats the rpm band where 70% plus of the time the cars engine is used to maximize fuel economy performance was not the main concern, upgrading the heads and intake, air flow rates has huge benefits in potential power,
the cross fire intake design maximizes the inertial ram effect the longer runner length has to increase cylinder fill rate efficiency
increasing the port cross sectional area in the heads and intake runner boosts potential power.
yeah it will take you a few days but read through this thread.. as it contains a good deal of related useful info
It's time to get this party started! Last night I picked up some of my parts, the only thing left to come in, is the Mahle piston and rings. This is just the first order, mostly the things I need right now to get started. It's been over ten years since I've driven this car and I am SOOO ready to...
garage.grumpysperformance.com
C4 Larger Intake Runners L98 TPI Hi guys, I'm new to the forum have had my 85 Greenwood Corvette for five years and have started to look for more power, was thinking of upgrading the inlet runners in between the intake manifold and the plenumn, i believe there is a larger set available, was...
garage.grumpysperformance.com
http://www.rbracing-rsr.com/runnertorquecalc.html http://www.compcams.com/Community/Articles/Details.asp?ID=1737510521 http://users.erols.com/srweiss/tablehdc.htm http://www.thecarburetorshop.com/Carburetorsizeselection.htm http://www.wallaceracing.com/runnertorquecalc.php...
garage.grumpysperformance.com
the basic concept behind the design of the crossram intake is to maximize the individual intake runner length , while maintaining as close to a direct strait shot at each cylinder heads intake valve, as possible so ram tuning, or use of the fuel/air masses inertia can be used along with exhaust...
garage.grumpysperformance.com
links, calculators and info well worth reading thru, yes theres a HUGE tendency to breeze over them, but they contain a ton of related info youll need USE THE CALCULATORS, YOULL, QUICKLY FIND THE LIMITATIONS http://www.rbracing-rsr.com/runnertorquecalc.html...
garage.grumpysperformance.com
this hobby's never cheap, but you can get amazing results from a carefully thought out upgrade/ change in parts
as
both the stock cross fire heads and intake are very VERY restrictive.
every change has a compromise required,
but matching parts and thinking through the changes leads to far fewer issues and much better power.
the following suggestion would provide a street performance upgrade ,
allowing easy daily driving, yet a big boost in performance over almost all of the power band.
you would be amazed at for a daily driver but certainly not a race engine
(you'll be amazed at the results of the upgrade linked below should you decide to go that route)
yeah, there will be some minor custom fitting/linkage fabrication etc.
and tuning required as the stock throttle body's and fuel delivery will need to be upgraded to match the power increase
but the heads and intake and cam together should easily exceed 80-90 hp PLUS or more, a better fuel pump and marginally boosted fuel pressure aids the power curve. obviously retuning will be required to maximize results.
I've done similar builds and you'll be impressed with the results should you choose to follow the upgrade parts suggested
if you have a low restriction exhaust.
raising the compression and keeping the cam timing mild, yet with a vastly improved flow rate's from heads and intake has a huge potential boost in mid rpm and upper rpm power.
Specifications for the 1982 Corvette, including dimensions, electrical, capacities, engine, and features. All options are listed, including prices and quantities shipped.
corvettestory.com
doubling the stock hp and measurably improving the tq is certainly within reach if your wallet allows you to go for the upgrades
Id look for either a renegade or OFFY and a mild hydraulic roller cam, similar to this,
the combo listed should boost power very noticeably
in seat of the pants acceleration, especially if you add a better fuel pump and swap to a 3.54:1-or 3.73:1 rear differential gear ratio.
the offy far out flows the renegade, intake but you'll need the better heads, and cam swap, roller rockers etc.
to take advantage of the much improved flow rates, and the rear gear ratio change would transform the drive characteristics very noticeably with the parts upgrade
Small Block Chevy 262, 267, 283, 302, 305, 307, 327, 350, 400 (1957-1998), Hydraulic Roller, 1900 to 5700 RPM Range, .323 Int .337 Ex Lobe Lift, EFI, Forced Induction, and NOS
cnc-motorsports.com
obviously ask questions about what plug angle clears your headers/exhaust manifolds, but Id get 195cc -200cc port heads
and do the math to get the correct combustion chamber size to get between 9:1-9.25:1 cpr Id look for 1.6:1 ratio steel roller rockers
that fit the stud size the heads come with, and use a mild roller cam.
AFR's 195cc SBC Enforcer Cylinder head feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your 350 to 400...
www.speedwaymotors.com
AFR's 195cc SBC Enforcer Cylinder head feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your 350 to 400...
www.speedwaymotors.com
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