ill give specs on both cams ones the comp 270h cam i caculated it to have 50deg of overlap.the other one is a sumit cam it has 53 deg of overlap. here are the specs .<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0><TBODY><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Brand:</TD><TD class=overview-c2 width="75%">COMP Cams</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Product Line:</TD><TD class=overview-c2 width="75%">COMP Cams Magnum Hydraulic Camshafts</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Part Type:</TD><TD class=overview-c2 width="75%">Camshafts</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Cam Style:</TD><TD class=overview-c2 width="75%">Hydraulic flat tappet</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Basic Operating RPM Range:</TD><TD class=overview-c2 width="75%">1,800-5,800</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Intake Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">224</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Exhaust Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">224</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">224 int./224 exh.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Advertised Intake Duration:</TD><TD class=overview-c2 width="75%">270</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Advertised Exhaust Duration:</TD><TD class=overview-c2 width="75%">270</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Advertised Duration:</TD><TD class=overview-c2 width="75%">270 int./270 exh.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Intake Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.500 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Exhaust Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.500 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.500 int./0.500 exh. lift</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Lobe Separation (degrees):</TD><TD class=overview-c2 width="75%">110</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Intake Valve Lash:</TD><TD class=overview-c2 width="75%">0.000 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Exhaust Valve Lash:</TD><TD class=overview-c2 width="75%">0.000 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Computer Controlled Compatible:</TD><TD class=overview-c2 width="75%">No</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Grind Number:</TD><TD class=overview-c2 width="75%">FS 270H-10</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Quantity:</TD><TD class=overview-c2 width="75%">Sold individually</TD></TR></TBODY></TABLE>

 

or this cam .<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0><TBODY><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Brand:</TD><TD class=overview-c2 width="75%">Summit</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Product Line:</TD><TD class=overview-c2 width="75%">Summit Cam and Lifter Kits</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Part Type:</TD><TD class=overview-c2 width="75%">Camshaft and Lifter Kits</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Cam Style:</TD><TD class=overview-c2 width="75%">Hydraulic flat tappet</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Basic Operating RPM Range:</TD><TD class=overview-c2 width="75%">2,000-4,500</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Intake Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">218</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Exhaust Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">228</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Duration at 050 inch Lift:</TD><TD class=overview-c2 width="75%">218 int./228 exh.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Advertised Intake Duration:</TD><TD class=overview-c2 width="75%">276</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Advertised Exhaust Duration:</TD><TD class=overview-c2 width="75%">286</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Advertised Duration:</TD><TD class=overview-c2 width="75%">276 int./286 exh.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Intake Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.471 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Exhaust Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.471 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Valve Lift with Factory Rocker Arm Ratio:</TD><TD class=overview-c2 width="75%">0.471 int./0.471 exh. lift</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Lobe Separation (degrees):</TD><TD class=overview-c2 width="75%">114</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Intake Valve Lash:</TD><TD class=overview-c2 width="75%">0.000 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Exhaust Valve Lash:</TD><TD class=overview-c2 width="75%">0.000 in.</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Computer Controlled Compatible:</TD><TD class=overview-c2 width="75%">No</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Lifters Included:</TD><TD class=overview-c2 width="75%">Yes</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Lifter Style:</TD><TD class=overview-c2 width="75%">Hydraulic flat tappet</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Valve Springs Included:</TD><TD class=overview-c2 width="75%">No</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Retainers Included:</TD><TD class=overview-c2 width="75%">No</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Locks Included:</TD><TD class=overview-c2 width="75%">No</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Valve Stem Seals Included:</TD><TD class=overview-c2 width="75%">No</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Timing Chain and Gears Included:</TD><TD class=overview-c2 width="75%">No</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Assembly Lubricant Included:</TD><TD class=overview-c2 width="75%">Yes</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #ffffff" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Pushrods Included:</TD><TD class=overview-c2 width="75%">No</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Rocker Arms Included:</TD><TD class=overview-c2 width="75%">No</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Gaskets Included:</TD><TD class=overview-c2 width="75%">No</TD></TR><TR onmouseover="this.style.backgroundColor='#f5f5f5'; " style="BACKGROUND-COLOR: #f5f5f5" onmouseout="this.style.backgroundColor='#FFFFFF'"> <TD class=overview-c1 width="25%">Quantity:</TD><TD class=overview-c2 width="75%">Sold as a kit.</TD></TR></TBODY></TABLE>

 

The 270H it has a tighter centerline and more intake duration @.050. Plus it has a much wider powerband!!!

 

The 270H will be lopey'r. The Summit cam is an RV style cam which is better matched for your van.

 

so the rhodes lifters an the 9.5.1 comprssion wount calm the cam down

 

I posted I vid a while ago of my truck running with the 270S

 

i know i tried listining to it but my computer is ****ed up so i cant hear sound. but any way it is a lopey cam .only thing im wored about is this is a single pattern cam .the other one was a split more on the ex side ...so im thinking the 270h might not make as much power on stock e7 heads if i decide not to port them ??? the sumit cam was a little lopey at first but when i fine tuned every thing it idled smooth as ice .i thought the sumit cam would be more lopey since it had 53 deg of overlap vs 50 . any way thanks guys

 

You have to look at the lobe separation angle too to decide how much of a lobe it's going to have. A 114* LSA will idle smoother than a 110*LSA

 

The 270 has an awesome lope, I had one.

 

what cam do u think will make more power if the heads were left stock .? the sumit one or the 270 h .oh and wheres the 270h peak off at .thanks

 

The summit one will probably make more all around power which is better for the stock heads. The 270 pulls real nice above 2500 all the way up and around 6000 and that was with stock heads on my truck, but you could really feel it start to choke at around 6k. If you do some minor porting (thermactor bumps, smooth the bowls, etc) the 270 would work great with the right intake.

 

look at my dyno vid...270s rpm intake 650 holley ported e7's with 1.90 1.60 valves little over 300hp @ the flywheel they tell me. 234 @ the wheels

 

so with my setup stock e7 heads peformer 289 intake 650 cfm carb .40 over pistons. bbk shorties full flow master exzaust 270 h cam rhodes lifters .do u think ill see 250 hp ??

 

don't know.......50hp for porting with bigger valves....rpm intake...650DP...long tubes with 3 inch duals.....

that intake, the performer is just a stock copy...you realy should get an rpm. $170.00 and it will pull to 6500rpms

 

I set up your engine on DD here is what it came up with.......



Analysis Report for Street/Strip Engine with Desired HP Peak at 6000 RPM

Peak Tq =266. @ 4000 RPM .86 Ft Lbs per CuIn
Peak HP =244. @ 5000 RPM .79 HP per CuIn

Maximum Exhaust System Backpressure 'Exh Pres' is 1.1 PSI.
This is typical for a street/strip vehicle with a free flowing,
full exhaust system. To simulate open headers, select the
'Open Headers' from the Exh System Type combo box.

Typical ranges of Exhaust System Backpressure are listed on page
32 in the User's Manual. You can lower the Back pressure by
increasing Exh System CFM Rating in the Exhaust Specs menu.
Lowering the Exh System CFM Rating will simulate a quieter, more
restrictive exhaust system. Most dyno tests are done with open
headers, which are simulated by selecting the 'Open Headers' from
the Exh System Type combo box.


Maximum Volumetric Efficiency 'VE %' is 89 %.
This is somewhat low for a 'non-supercharged' street/strip engine.
Typical 'non-supercharged' street/strip engines have VEs of 85-105%.

Volumetric efficiency is the best measure of an engine's air flow
capability at a particular RPM. High VE is is critical to obtain
high torque and HP. See page 73 for a definition of volumetric
efficiency. Most all engine specs affect VE and the RPM at which
peak VE occurs. Generally, engine torque will peak close to the
RPM giving peak VE.


Maximum Fuel Flow 'Fuel Flow' is 163 lbs/hr GAS.
This is equal to 27.9 gallons per hour of fuel flow.
For an injected engine with one injector per cylinder, you will require
at least 20 lbs/hr injectors.

Fuel Flow will only change if air flow changes or if you inject
nitrous. The Engine Analyzer assumes 12.5:1 A/F for gasoline and
5:1 for alcohol (methanol) and 3:1 for 'Very Rich Alcohol' for all
conditions. You can not richen or lean out the fuel mixture.


Mechanical Efficiency 'Mech Eff' is 73 %
at the current Peak HP RPM of 5000 RPM.
This is somewhat low and represents a real power loss in this
engine's current operating range. This can be improved by paying
close attention to details in the Short Block Specs menu.

Mechanical Efficiency can be improved by:
- Better matching the Supercharger size or Belt Ratio to
the engine if the engine is Supercharged
- Reducing piston skirt size or piston ring tension
- Minimizing 'power robbing' accessories
- Reducing crankcase windage
- Reducing stroke
- Reducing valve spring loads
- Reducing the engine's operating RPM range


The Intake Valve Mach # 'MACH #' is .597
at your 'Desired HP Peak RPM' of 6000 RPM.
This is somewhat high and indicates you will need more Intake Valve
Diameter, Valve Flow Efficiency or more intake cam profile
(larger Intake Duration, Tappet Lift or Rocker Arm Ratio).

MACH # is the BEST INDICATOR of the usable RPM range of this
engine with the current cam & head specs. Air flow and performance
drop rapidly (the engine 'runs out of breath') when the MACH # goes
over approximately .55 for low RPM engines or .45 for high RPM
engines.

MACH # is explained on page 53 in the User's Manual. You can
lower the MACH # by specifying larger Valve Diameter or Valve Flow
Efficiency in the Head Specs menu or larger Intake Duration, Tappet
Lift or Rocker Ratio in the Cam/Valve Train menu. MACH # is
also affected by Intake Port Diameter, Intake Manifold Runner Diameter
and Runner Flow Efficiency in the Intake System menu, but to a lesser
extent.


Your 'Desired HP Peak RPM' you entered for the Analysis Report
matches the 'For Peak HP at this RPM' spec you entered in the lower
right corner of the Running Conditions menu (the menu containing
the Weather Conditions, RPMS to Run, etc.)

Check the 'Approx Cam for HP Peak' suggestions at the bottom of
the Special Calculations section of the calculated test results.
They will suggest APPROXIMATE cam specs to produce a HP peak at
this RPM with your current cylinder heads. (If you don't see the
Special Calculations section, click on View, then click on 'Show
Special Calculations'. Then click and drag the scroll bar button
on the right side of this section down to see all the Special
Calculations, including these suggestions.)


The Maximum Average Piston Speed 'Piston Spd' is 3000 ft/min
at the Performance Calculations Maximum RPM of 6000 RPM.
This is somewhat high (if you want to run this entire speed range),
requiring light, high strength reciprocating components.

A street/strip engine should limit Piston Spd to a range of 3000-4000
ft/min. However, even to run at 3000 ft/min or higher, you will need
'better than production', high quality reciprocating components
(connecting rods & bolts, pistons, etc.).

Piston Spd (average piston speed in ft/min) and Piston Gs (peak
piston Gs) are indicators of how severely you are stressing the
engine's rotating components. To lower Piston Spd and Piston Gs,
you must shorten the piston Stroke or design the engine for a lower
RPM range.

Maintaining low Piston Spd and Piston Gs are critical for 'keeping the
engine together'. OVER-REVVING PARTS BEYOND THEIR INTENDED LIMIT IS
UNSAFE FOR THE ENGINE, YOURSELF AND BYSTANDERS.


Maximum Contribution to VE During Overlap 'Overlap %VE' is 0 %.
This is Very low for street/strip engines which typically show
3-8%. Low Overlap %VE will limit Tq & HP and is most likely is caused
by high exhaust backpressure, high intake vacuum, exceptionally poor
intake and/or exhaust tuning or too little valve overlap.

It is normal for Overlap %VE to dip (even go negative) at some RPMS.
You will not be able to eliminate these dips and still maintain high
Overlap %VE at other RPMs. However, you may be able to move the dips
outside your desired RPM band.

Overlap %VE is the amount that volumetric efficiency (and performance)
improves by tuning or is hurt by intake reversion during overlap.
Overlap %VE improves (is a high positive + number) when:

- Exhaust pressure 'Exh Pres' is low
- Exhaust tuning pressure during overlap 'ExTun Prs' is low
(a large negative number).
- Intake vacuum 'Int Vacuum' is low
- Intake tuning pressure during overlap 'In ResTunPrs' is high

The tuning pressures are affected by runner dimensions and somewhat
by cam timing. Review Appendix 5 on intake and exhaust tuning.

Overlap %VE is also strongly affected by the amount of cam overlap. If
the pressures mentioned above are good and the cam has a large
overlap, OV %VE will be high and help performance. If these pres-
sures are good, but cam overlap is low, Overlap %VE will be less
and the performance improvement will be less.


The Intake Runner Velocity 'Int AvgVel' is 343 ft/sec
at your 'Desired HP Peak RPM' 6000 RPM.
This is somewhat high and indicates you will need a larger Intake
Runner Diameter or larger Intake Port Diameter for less
restriction and stronger intake tuning.

For these engine specs, an 'Int AvgVel' of about 260 should work well.
If the 'Int AvgVel' is approximately 30-80 Ft/Sec higher than this,
you will likely improve torque below this RPM, but lose some HP.


The Inertia tuning of this intake is tuned to 5569 RPM,
which is close to your 'Desired HP Peak RPM' of 6000 RPM.
Since this RPM is about where the HP peak should occur, peak HP
should be good. If you specify longer and/or smaller diameter intake
runners, you will likely gain Peak Torque and lose some Peak HP.


Your 'Desired HP Peak RPM' you entered for the Analysis Report
matches the 'For Peak HP at this RPM' spec you entered in the lower
right corner of the Running Conditions menu (the menu containing
the Weather Conditions, RPMS to Run, etc.)

Check the 'Intake Port+Runner Dimensions' suggestions in the Special
Calculations section at the bottom of the calculated results. They
will suggest APPROXIMATE dimensions for Intake Runner Length
and Runner Diameters you can try to produce strong intake inertia
tuning at your Desired HP Peak RPM. (If you don't see the Special
Calculations section, click on View, then click on 'Show Special
Calculations'. Then click and drag the scroll bar button down on
the right side of this section to see all the Special Calculations,
including these suggestions.)

IMPORTANT: These runner dimensions are for the entire runner from
the valve to the plenum, which includes the port in the head and
runner in the manifold. Be sure to divide these suggested lengths
between the port AND runner. For example, if the suggested Intake
Length is 15, and 5 inches is in the port, use 10 inches in the
manifold runner.

IMPORTANT: These runner dimensions are based on the CURRENT engine's
CAM SPECS. If you change cam specs (for example to the cam suggested
in this section), these runner specs will also change. Therefore,
if you are following these suggestions, put in the suggested cam specs
first, recalculate performance, then put in one of the sets of
intake runner dimensions suggested with the new cam specs.

End of Analysis Report