Now heres a question??

Anonymous · Post by **Anonymous** » Mon Nov 10, 08 11:31 am

last night, I got asked the question how much power am I putting out? Good question,

I have no idea. How much grunt should I be expecting (or not) from my engine? For a re-cap, its a 318 stroked by .010 via an offset grind, has 340 'J' heads with 2.02 intake and 1.60 exhaust (polished) valves, a Comp Cams 268H cam (Duration: 268/268 @ .050": 218/218 Valve Lift: .454/.454), 600 sec vac Holley on an Edelbrock performer intake, headers of unknown make (look the same as hookers) and electronic ignition.

Any one got any rough ball park figures I should expect to see? Next year I might get it on a rolling road to see what it actually does? is my little teen gonna do me proud?

Dave-R · Post by **Dave-R** » Mon Nov 10, 08 11:35 am

If you post the intake and exhaust opening/closing points from the cam card I can plug the numbers into desktop dyno and give you a rough figure.

I don't think you have the duration @ 50thou right. That looks more of a "advertised" duration figure.

Anonymous · Post by **Anonymous** » Mon Nov 10, 08 11:42 am

Your right Dave sorry, that is advertised duration. Actual duration @.50 is 218. This is the info on the stick that I have.

High Energy™ Cam
These high torque cams work very well on the street. Designed for use in carbureted engines having a 9:1 CR or less. Can be used in conjunction with most stock components, including intake and exhaust manifolds, and carburetors. Normally, gas mileage will either remain the same or increase over a stock cam

Camshaft Specification Table
Part Number 20-212-2
Engine 1964-2000 Chrysler
273ci-360ci
8cyl.
Grind Number CRS 268H-10
Description

--------------------------------------------------------------------------------

Intake Exhaust
Valve Adjustment 0 0
Gross Valve Lift 0.454 0.454
Duration At 0.006 Tappet Lift 268 268

--------------------------------------------------------------------------------

Valve Timing At 0.006
Open Close
Intake 28 60
Exhaust 68 20

--------------------------------------------------------------------------------

These Specs Are For The Cam Installed At 106 Intake CL
Intake Exhaust
Duration At 0.05 218 218
Lobe Lift 0.3026 0.3026
Lobe Separation 110

--------------------------------------------------------------------------------

Cheers

Dave-R · Post by **Dave-R** » Mon Nov 10, 08 11:49 am

That is enough for a ballpark figure. That intake is a dual plane isn't it?

Anonymous · Post by **Anonymous** » Mon Nov 10, 08 11:51 am

Yes mate, its an edelbrock street performer.

Dave-R · Post by **Dave-R** » Mon Nov 10, 08 12:24 pm

I will have a look at it tonight for you. But don't expect anything dramatic. It is quite a mild build.

Anonymous · Post by **Anonymous** » Mon Nov 10, 08 12:34 pm

lol, Cheers mate, I'm not really expecting anything mega as it was built for street use more than anything. I very nearly bought a .484 cam for it and a better intake but I drive this nearly every day so I had to behave with it. I need it to do more than 20 mpg.

Kev · Post by **Kev** » Mon Nov 10, 08 1:15 pm

How much cut on the heads? My guess is 190hp

Anonymous · Post by **Anonymous** » Mon Nov 10, 08 2:41 pm

Dunno mate, they were already on the car when i bought it and I've had .010 removed

Anonymous · Post by **Anonymous** » Mon Nov 10, 08 6:56 pm

Kev wrote:My guess is 190hp

Really? From what I have been reading the 1970 318 motor as standard with a 2bbl produced 230horses @ 4400 and 320lbs-ft of torque @ 2000. If this is right I would expect mine to be pushing 250-260hp?

I await correctment.

BUDGIE · Post by **BUDGIE** » Mon Nov 10, 08 7:04 pm

Kev wrote:How much cut on the heads? My guess is 190hp

Nah.........145-175

Anonymous · Post by **Anonymous** » Mon Nov 10, 08 7:28 pm

Yeah,

although I'm not expecting much, it would be nice to see more than 145.

Anonymous · Post by **Anonymous** » Mon Nov 10, 08 9:13 pm

When you ask how much power are you putting out, you mean at the wheels ?

Kev is probably about right ... 180-190.

Plus, remember that the 1970 figures were gross, in other words, on a dyno with no exhaust system and minimal ancillaries.

Hence, your factory 230hp was probably actually 175-180, and by the time it got to the wheels, probably about 140.

Trigger_Andy · Post by **Trigger_Andy** » Mon Nov 10, 08 10:11 pm

Come on Dave, what do ya reccon he's makin' then?

Been waiting all night!

BUDGIE · Post by **BUDGIE** » Mon Nov 10, 08 10:16 pm

A mistake .........whop a 440 in