Hey guys,

I'm replacing the motor in my RS with a carb'd 350 out of a truck.

The motor will have the following components:

416 "HO" heads (stock but cleaned up rebuilt)
Edelbrock Torker II Manifold
750 Edelbrock Performer Carb
Stock exhaust except Cat is removed
Standard truck "relief" pistons
Compression should roughly be around 9.9 to 10.1


I was told a good cam would be a 224/228 with a 112 lsa.
Is this true?
I'm looking for tq in the mid range and power on top but won't be going past 5.5k rpm but will mainly shift at 5.2k

Transmission is a 700r4 with 2.73 gears all stock but at some point will either go 3.32 or 3.73.

Would this be a good cam?
http://www.summitracing.com/parts/SUM-K1105/

Thanks for the help guys!

 

Not a bad cam, i'd prefer to see it on a tighter 110 lsa or so.

there are several 224-ish duration cams out there that should be ok in that motor. May want to take it to 5500 rpm tho, it should make power up that high.

Else try something in the 218 degree range on the intake.

 

Thanks for the reply I was lead to this cam

http://www.summitracing.com/parts/LUN-00016LK/

and I see it has the 218 Intake and also a 218 exhaust with a 110 lsa.
According to Lunati it's range is 1500 to 5200 which is where I'm aiming.

So my questions are:

Will this give me a good "Cammed" sound?

Will it work with my 10.1 compression on pump gas and if so what octane?

Will these cams open to much and cause issues with the valves on the stock 416 heads?

The specs of the cam are:

Cam Style Hydraulic flat tappet
Basic Operating RPM Range1,500-5,200
Intake Duration at 050 inch Lift 218
Exhaust Duration at 050 inch Lift218
Duration at 050 inch Lift218 int./218 exh.
Advertised Intake Duration284
Advertised Exhaust Duration284
Advertised Duration284 int./284 exh.
Intake Valve Lift with Factory Rocker Arm Ratio0.458 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio0.458 in.
Valve Lift with Factory Rocker Arm Ratio0.458 int./0.458 exh.
liftLobe Separation (degrees)110Intake
Valve Lash0.000 in.
Exhaust Valve Lash0.000 in.
Computer-Controlled Compatible No
Lifters Included Yes
Lifter Style Hydraulic flat tappet
Valve Springs Included No
Retainers Included No
Locks Included No
Valve Stem Seals Included No
Timing Chain and Gears Included No
Assembly Lubricant Included Yes
Pushrods Included No
Rocker Arms Included No
Gaskets Included No
QuantitySold as a kit.

 

Should work ok. lift is only .458 which is fine. Wont cause any problems with those heads, just make sure the retainers dont hit the valve guide boss. piston to valve clearance will be fine.

It will give abit of a cammed sound. You should beable to hear something. You could try the more aggressive lobe version of that cam, the voodoo series. I think they have a 219/227 which would be nice in that setup. Should give abit more torque/hp in the midrange with the more aggressive lobes.

If you had the valve events from the cam card you can calculate the dynamic compression ratio which is a good check to see if it will work on pump gas but not the rule of thumb..its just a guide. I can check it later but from the looks I dont think you will have too much problem with that and 93 octane if its available.

 

Thanks!

I did take a look at at the Voodoo 219/227 as an option but read from someone with 10.1 compression that it was just to much for 93 and he had to mix a gallon of 110 in to race it. 110 is harder to come buy here and I want to be able to drive it daily with out to much hassle.

 

i am kinda surprised at that, as it should run ok with good tune. Run a step colder plug, be conservative on the timing and it should be fine on 93.

10 to 1 is on the higher side with iron heads but certainly doable. I have heard certain year L98s, from 90-92 had flat top pistons that pushed compression to near 9.8 to 1, and with smaller cam still runs on 87 octane. I dont think you would need much more than 93 octane with either of those two cams.

I'll run some dynamic compression figures with those cams to see what those numbers look like. I would expect them to be in the mid lower 8's to 1 so it should run ok.

 

Thanks! I really appreciate it!

If I can use the Voodoo 219/227 with out problems I'd be on that in a heart beat but if it's the monster 218/218 then I'll go that route as long as I can run pump gas on it and it lights the tires up and pulls through the band I'll be happy!
Let me know what your calculations come back with.
And again Thanks!

 

Assuming 10 to 1 compression, that voodoo cam has slightly better DCR, meaning abit lower so it should favor pump gas more. I get 8.3 DCR for the voodoo and 8.45 for the bracket master II cam.

I'd go voodoo on that setup