Customs 327 cam advice

I am building a 331 small jounal for MY 55 chevy. I have a few ideas on the cam but would like a second opinion. Here's what I got. 327 30 over
Dome pistons, trick flow dhc heads 2.02 1.60 tri power intake ( rochester 2 jets ) h beam rods 4 speed 4.11 gears. Not a daily driver, not afraid of 7000 rpm, race gas, pump gas mix ( 50/50 ) dont wanna here I need to build a crate engine, or I need a 383. If you dont like the intake keep it to yourself. Just looking for a few cam ideas that's all

 

Go with what Chevrolet did...30-30 Duntov. That's what I'd do.

 

here is the one i used.

 

This is the cam Schneider recommended for my 327 .
http://schneidercams.com/LSP-2Hsbchyd.aspx

 

you could go a bit bigger than those suggestions....

 

Curious what "dome pistons" equates to in compression ratio, also, are these the true camel hump aluminum Trick Flow heads?

 

this looks good and you don't have to put up with .030 lash http://www.superchevy.com/how-to/en...vy-small-block-327-outputting-462-horsepower/

 

Sunbeam...that is impressive!! I'd love to see the same tests with the OPs tri-power and some carb tweaking.

 

Yup, me too


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2.o2 double hump fuely heads are cast iron.

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I believe Trick Flow has new aluminum 'fuely' heads.

 

I'm hip!

 

Bigger - If you want something a little nostalgic, how about the GM Off Road 140 cam. It will get you to your 7000 rpm, if the rest of the engine will. Be sure to use the right valve springs.

How many CFM will your tri-power flow. It sounds to me like it might be the limiter to the engine.

 

Some double hump heads have 1.94 intake vakves, not fuelys.

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When I bought my NOS GM "291" 2.02 head castings about 30 years ago, included were all new GM valves, springs, retainers, keepers and factory "O" stamped rocker arms, the springs were the matching GM versions for the off road camshaft, I also had an NOS 327/350hp cam and wanted to use the springs but was advised against it due to their high pressure.

 

I'm with Jimmy six. Duntov 30/30 with solid lifters. I'm building a 283 with fuelie heads bought a duntov for it. Can't beat the sound of it either.

 

I am running a 375 HP 327 (Rochester FI) in my '40 coupe......been running it since 1990. Has the Corvette .030-.030 cam.....with about 18 degrees static timing, 37 degrees (No vacuum advance) all in at 2600 RPM it will spin up to 6700 easily. Heads are stock, but cleaned up for flow, decent set of headers. Had a 365/327 (same engine with a 4 bbl) in a '55 Chev post car......real nice street machine.
I suggest you either pin the rocker studs or use screw-in studs to keep the top end together. Also use the push rod guides. Think about using a high volume oil pump also. Those Rochester 2Gs may not be enough for your motor.......unless you have the "big" ones.

You might also think about port matching the intake manifold to the heads......pretty good pay-off.

 

Cam tech has improved in the 50 years sense the 30-30 cam look at my super Chevy post.

 

I'll agree there are close to 1 billion better cams than a 30-30, but will never have the mystic of your answer when asked " what cam you got". It will bring a smile to everyone within hearing distance.
Also HP is in the eyes of the owner. Some never have enough and watching some drive, they have way too much. 300-350 honest HP using pump gas will make any 55 drive and run like a dream. I'd also use some type of cast iron exhaust so I could listen to it too.

 

I would think twice about this unless you are running an engine with special large racing bearing clearances. It's just not a good idea.

 

If using pushrod guideplates make sure to use FULLY hardened pushrods.

 

Pulled out my Duntov .030-.030 cam for a recommended Comp cam, in '95. Also, replaced my Hi-Volume oil pump, same time.
Highly doubt ever needing a .030-.030 cam again, gave it to the kid down the street building his first 327. Warned him, but he Had to HAVE it! Cool by me.
DDDenny... Had to laugh about the pushrod guides. My younger brother wouldn't listen, whittled his soft pushrods flat! (less than 200 miles...)
He asked me how I knew... Told him my X-acto did that to the balsa stringers on my big model Gee Bee race plane, when fitting to bulkheads!

 

DON'T mess with the old Duntov 30-30. VERY old tech. With big compression.....race fuel.....big gear.....4 speed....get a custom stick from somebody like Delta Cams. Tell them what you have and Ken... will steer you in the best direction. Prolly cheaper than an "off-the-shelf" Comp Cam too.
Look in the Summit catalogue at the Isky cams specs. Dirt track cams....they all have a 108* LSA! That is where the rumpity-rump tone comes from but........they make BIG power to about 6 grand and they're done. Use these specs when talking to a cam grinder and go from there.
He fixed my RIGHT UP on my SBF.
6sally6

 

I don't make this shit up!

 

Read this http://www.superchevy.com/how-to/en...vy-small-block-327-outputting-462-horsepower/
and this
https://www.hotrod.com/articles/ccrp-0711-331-ci-chevy-small-block-engine/

They actually have dyno numbers to prove it. A lot of folks go by the "seat of your pants" dyno. Stick with proven parts and combinations.

 

The "097 Duntov" is your friend!

 

I ran a Comp 294 solid in a similarly built 327 except with a single 4BBL and it ran pretty good

 

Is a o97 a 30-30 solid lifter, 365 hp, or a 350 hp hydraulic ?

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The 327/350 hp engines used the "151" camshaft.

http://www.superchevy.com/features/sucs-0732-chevy-l79-engine/

 

Somebody please explain to me why a 30-30 Duntuv cam needs .030 valve lash? Where are Ford's lash? If I remember right they be down around .020 in FE and and other OHV engines all the way back to the FH at something like .009/.011..