Part two camshafts

Kev · Post by **Kev** » Tue Nov 20, 07 6:42 pm

What is the overlap, as this helps when determining your dynamic CR which will determine your fuel requirements. Work it out with a 40 thou quench if you can.

Blue · Post by **Blue** » Tue Nov 20, 07 7:30 pm

A .590 cam in a 505 cubic inch motor will be not be that radical, and quite possibly streetable. Once we've sussed out your static compression we can work out if that cam would be a good choice.

Dave-R · Post by **Dave-R** » Tue Nov 20, 07 7:40 pm

pete walton wrote: i chose the mopar .590 mech cam ,and its a bit old school..

Well it will work.
But not as well as a modern design.
You missed an opportunity to make more power for the same duration which equates to more power without making it less streetable.

Dave-R · Post by **Dave-R** » Tue Nov 20, 07 7:42 pm

Blue wrote:A .590 cam in a 505 cubic inch motor will be not be that radical, and quite possibly streetable.

That actually used to be an old time recipe for a streetable 500HP engine. I have an old article on file somewhere. I might dig it out.

Dave-R · Post by **Dave-R** » Tue Nov 20, 07 8:38 pm

Found it. September 1984 Car Craft magazine.

Fat Blocks - Durable Street Strip 440

Used 440 block.
Decked 4 thou, bored 30 thou over.
Checked for big end alignment (but not align honed).
1/2-inch oil pick-up
Stock used forged crank given a polish.
Stock rods magnafluxed, shot-peened and re-sized.
Forged TRW flat top pistons.
906 heads with bowls ported using the MP templates opened a little more to meet 2.18/1.81 valves.
Hydraulic (not solid sorry) 509 cam installed on a 108 degree centerline (needing a 5 degree advance offset bushing).
Electric water pump.
Holley street dominator intake with heat crossover blocked off (worth 26hp on this engine)
Holley 750DP carb.

It made 511 HP at 5500rpm. 522lbs torque at 4600rpm.

Dave-R · Post by **Dave-R** » Tue Nov 20, 07 8:59 pm

Desktop Dyno gives slightly lower HP and torque for a similar combo as above. because of restrictions in the heads etc a solid cam is only adding about 13hp and 20lbs.

Ivor · Post by **Ivor** » Wed Nov 21, 07 10:22 am

Dave wrote:Found it. September 1984 Car Craft magazine.

Blimey Dave, that's service beyond the call of duty mate!

Pete · Post by **Pete** » Wed Nov 21, 07 10:31 am

Good stuff, Dave; but I think the world has moved on a bit since then.........

Dave-R · Post by **Dave-R** » Wed Nov 21, 07 11:19 am

Pete wrote:Good stuff, Dave; but I think the world has moved on a bit since then.........

My point exactly Pete. But apart from better heads he is only going to make similar power with that cam.

Pete · Post by **Pete** » Wed Nov 21, 07 11:53 am

Actually, that is EXACTLY the spec of the motor I have just taken out of Julie's car. Not power full enough, and that is a light car. We also had much more carburation on it........

Blue · Post by **Blue** » Wed Nov 21, 07 12:01 pm

Yes but Pete has a .590 cam not a .509, different beast entirely...

Kev · Post by **Kev** » Wed Nov 21, 07 12:02 pm

RTFM!!

Cannonball · Post by **Cannonball** » Wed Nov 21, 07 12:16 pm

here you go pete,
75 440 block, cast crank, sixpak rods, trw pistons, ported 452 heads, with the big valves, compression 11.5/1 weind team g intake, 1050 dommie carb mopar perf 590 mech cam crane iron adj rockers, hooker 2" under chassis headers, 4.30 gears, 69 b body well light, 10.76 126,
them 5.90 cams can work very well

Dave-R · Post by **Dave-R** » Wed Nov 21, 07 12:24 pm

Blue wrote:Yes but Pete has a .590 cam not a .509, different beast entirely...

ooops!!!

Thats the old dyslexia rearing its ugly head again.

Mopar Muscle Association UK

Part two camshafts

Re: Part two camshafts