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 StrokerEngine.com

Dyno tests are examples not Stroker Engine claims.

The following are links to pages show power output levels for various products.
I include them to help you understand how to choose appropriate components that will work well together.

Below these links are a few parts combination tested by their manufacturers to produce various horsepower and torque levels.
By studding these comparisons will help you to see the results of camshaft durations, and intake port sizes.

Making power is a result of physics not "black magic".
High horsepower engine will require higher RPM and more efficient airflow.
This may result in a rougher idle and less vacuum than you are prepared to live with.

For the average high performance street engine 400 to 450 horsepower and torque is very obtainable.
Engine that must pass a smog emissions test will be limited to the level of horsepower they can produce.

500 plus horsepower engines can work well enough on the street,
but be prepared to lower your rear end ratio and give up some gas mileage.

There is a major transition point for camshaft duration at over 230 degrees @ .050" lift.
Longer durations will begin to dramatically reduce idle quality, vacuum
and will require a high stall speed torque converter.

When considering camshaft manufacturer's torque converter recommendations,
keep in mind they are assuming you are wanting the fastest possible launch
and full utilization of engine power. This is really for drag racing with good traction.

On the street tire spin usually spoils this type of launch.
Further you will not likely want to leave at full throttle everything you leave a traffic light.
As such choosing a lower than recommend stall speed might make the car more street friendly.

Higher stall converter have a "sloppy" feel to them below the stall speed.
This means if you are cruising at an RPM below the stall speed,
your converter will not feel locked up.
This "feeling" is a personal preference,
so please keep this in mind when choosing both the camshaft and torque converter.

A camshaft with more than 240 duration @ .050" lift will require a faster idle,
less vacuum for the power brakes and maybe difficult to "hold on the line".
However it is the key to making over 450 horsepower.

You must decide what is more important to you,
maximum horsepower at a higher RPM or more friendly drivability.
A really long duration cam may require your shifting into neutral at a long traffic light stop.

As you look over the performance comparisons in this site,
and other engine supply sites, keep in mind this "general rule of thumb".
Greater horsepower requires greater airflow.
More torque requires faster airflow.
Finding the right balance is what building your perfect engine is all about.
A high horsepower motor is more difficult to drive on the street.

A slight exception to this rule is obtain by using better heads.
Although I don't like to promote one head manufacturer over another,
it does become apparent by looking at the number sbelow, that
Air Flow Research (AFR) Heads do produce more horsepower
and torque with a similar camshaft than do the others found in this site.

Should you choose to use AFR Heads, bare in mind that AFR are a
small company with a big reputation. They are hard press to keep
up with all the orders they receive. Therefore please be prepared
to wait approximately 8 weeks for your heads to arrive.

By ordering these heads first I can complete your engine order very
shortly after these heads arrive.

As always I am here to help, and consultation is free.

See Dyno Testing the SBC

Technical Articles 

Bored & Stroked

 SEE BLOCK DECK HEIGHT TABLES

 BKR7E is 1283

 http://www.corvettefever.com/techarticles/153_0503w_spark_plug_basics/index.html

Big performance in a little package.
These NGK V-Power spark plugs offer economical performance for nearly any automotive application, and are the only plugs with NGK's V-Groove technology. They enhance ignitability, lower the voltage requirement of ignition systems, and have strong anti-fouling characteristics, while improving fuel mileage and acceleration performance. The V-Power plugs also are highly durable against electrical and chemical wear, making them a long-life replacement plug. Because of the V-Groove, the spark occurs at the edge of the center electrode. So heat is not absorbed by the electrode itself. This allows the flame kernel to expand quickly and efficiently for a complete burn and great performance.

The plugs used by winning racers.
These G-Power Platinum spark plugs deliver the power and quality you expect from NGK. The fine pure platinum electrode tip remains virtually unchanged and reaches self-cleaning temperatures to deliver longer durability and optimum performance. Compared to conventional plugs, G-Power delivers better starts, superior acceleration and greater fuel economy.

These NGK Iridium IX spark plugs feature an ultra fine center electrode that's designed not too thin to ensure maximum durability and life of the spark plug and not too thick for an accurate and consistent spark. They represent the ultimate evolution of spark plug technology and performance. Iridium is significantly stronger than any metal used in spark plugs today. It's the hardest metal used (in fact, iridium is 6 times harder than platinum) which has allowed NGK engineers to design an ultra fine center electrode reducing the voltage requirement for spark.  

How to Select and Service Spark Plugs Click Here 

Racing Spark Plug Cross Reference Chart
Autolite Racing PN Champion PN NGK PN NGK Stock Number AR12 RV9YC R5674-7 3535  AR13 RV9YC R5674-6 4449  AR23 RV9YC BPR6FS 2623  AR24 RV12YC BPR6FS 2623  AR25 RV15YC4 UR4 6630  AR32 RF9YC AP8FS 2227  AR33 RF9YC AP7FS 2127  AR50 N59YD R5672A-10 3395  AR51 N61YD/N6YC R5672A-9 7405  AR52 N63YD/N7YC R5672A-8 6564  AR53 N9YC BP6ES 7333  AR72 J12YC R5670-7 2891  AR73 J12YC R5670-6 6659  AR74 J12YC R5670-6 6659  AR92 S57YC R5724-10 7993  AR93 S59YC R5724-9 6434  AR94 S61YC R5724-8 4175  AR103 RS9YC BPR6EFS/TR6 3623  – RF10C AR6FS 3323  AR131 V55C R5673-10 4050  AR132 V57C R5673-9 3442  AR133 V59C R5673-8 3249  AR134 V63C R5673-8 3249  AR135 V63C R5673-7 4367  – RV8C R5673-6 4256  – N3C R5671A-7 4091  AR472 S57C B9EFS 1085  AR473 S59C B9EFS 1085  AR474 S61C B8EFS 1049  AR764 RS12YC TR5 2238  AR2592 C59 R5671A-10 5820  AR2593 C61 R5671A-9 5238  AR2594 N2C B9ES 2611  AR3910 C59YC R5672A-9 7405  AR3911 C61YC R5672A-8 7173  AR3923 RC9YC BKR6E 6962  AR3924 RC12YC FR5 7373  AR3931 C55C R5671A-11 6596  AR3932 C57CX R5671A-10 5820  AR3933 C59CX R5671A-9 5238  AR3934 C61CX R5671A-8 4554  AR3935 C63C R5671A-7 4091  – L87YC BP6HS 7331          AC Delco to NGK Cross Reference AC DELCO NGK PN NGK Stock Number 40TS R5674-7 5034 41XL R5671A-8 4554 42S R5670-6 2746 42TS R5674-6 4449 436T R5673-9 3442 436TS R5674-9 6468 436XLS R5672A-9 7405 438T R5673-8 3249 438TS R5674-8 5657 438XLS R5672A-8 7173 43S R5670-6 2746 43TS R5674-6 4449 440T R5673-7 2817 440XLS R5672A-8 7173 44S R5670-5 2298 45S R5670-5 2298 46S R5670-5 2298 C44S R5670-5 2298 M43S R5670-6 2746 M90 R5670-9 3913 MR41T R5673-8 3249 R42S R5670-6 2746 R43S R5670-6 2746 S40XL R5671A-10 5820 S41XL R5671A-9 5238