Camshaft Help

[Procharged 434]

Anyone know how well this camshaft would work in a 409 sbc with 18° heads and a Procharger, atleast an F2, maybe an F3D-106? The gentleman that has it forsale said that it was ground for a sbc turbo application, but looking at the Cam Card, it doesn't really look like most turbo camshaft specs that I've seen, but I'm not an expert. I was wondering how well it might work in a Procharger application?

[rustbucket79]

I wonder what that 1.9483 is referenced to? That seems like a pile of lobe lift too.

[Procharged 434]

I wonder what that 1.9483 is referenced to? That seems like a pile of lobe lift too.

That refers to the camshaft journal size, which indicates that it is for a sbc that uses BBC journals. I think 1.948" is the standard BBC size, such as our Dart Iron Eagle sbc block uses.

[rustbucket79]

Makes sense, and on a bbc core the lobe lift seems less concerning.

[CamKing]

Should be good to 8,000rpm, and need a 5,000+ stall.

[Procharged 434]

Should be good to 8,000rpm, and need a 5,000+ stall.

Thanks Mike, 8000 is exactly what we were planning on turning it. We have a Neal Chance bolt together converter, so adjustments can be made fairly easy if needed. We are thinking maybe around 1800hp with an F3D-106 blower. So it sounds as if it would work fairly good for us then? Application is 1/8 mile drag racing.. I do have another camshaft as well, how would it compare to the first one I posted above. Here are the specs on it

312/316 Advertised
279/283@ 050
.776"/.776 lift
112° Lobe Separation
108° Intake Centerline

IO- 31.5°
IC-67.5°
EO-77.5°
EC-25.5°

57° Overlap

Which camshaft would work better for this 409 sbc with an F3D-106 Procharger? The first cam or this second cam?

[CamKing]

The 266/277 would work much better.

[Procharged 434]

The 266/277 would work much better.

Thanks Mike! I think we will use that 266/277 camshaft, it may not be perfect for it, but sounds like it would work plenty good

[Procharged 434]

The 266/277 would work much better.

Mike, would you install the camshaft at 116° as stated on the card, or would you recommend installing it at a different Centerline for this application?

409 SBC
Dart Iron Eagle 9.325" block w/BBC cam journal
4.165" Bore
3.750" Stroke
6.125" Rods
Ross custom Hard Anodized piston
Trick Flow 18° heads ported(370cfm)
GM 18° Intake manifold fully ported to match head flow
1.6 Jesel rockers (.768"/ .776" gross lift)
PAC 1356 springs Installed at 2.00" I.H.
10.3-1 compression
Holley Dominator EFI
90mm Throttle Body
575pph Billet Aromizer Injectors
M1 Methanol Injected
Procharger F3D-106 Supercharger and Gear Drive
Boost- 25-30 lbs?
2 1/8" headers
Powerglide 1.80 Gearset
3.50 rear gears

The car is a stock suspension 1991 Trans Am, weight is around 3400lb, and will run either a 28x10.5 slick or a 275/60 drag radial. 1/8 mile drag racing application.

Thanks

[F-BIRD'88]

The cam card info re: printed intake ex centerlines is NOT their "recomendation" . It is for reference for how the cam is ground.. eg: "straight up" or with advance or with retard.

It is up to you to decide or test for the best installed cam phasing. on this cam.. I suggest slightly. "advanced" 3 to 7 degrees.

This is something that you can work out on the dyno or at the track.. Be aware that advancing the cam reduces intake VTP clearance and retarding the cam reduces exhaust VTP clearance respectivly.. Something to verify too.
Most all Comp Cams custom grind cams are ground "straight up" unless the customer specs a advance or retard phasing be ground in on their custom cam.
Still, it is up to the installer to check and optimize installed camshaft phasing.

[CamKing]

The 266/277 would work much better.

Mike, would you install the camshaft at 116° as stated on the card, or would you recommend installing it at a different Centerline for this application?

Put the intake centerline on 112