CAM GURU's INQUIRE WITHIN

[Irish]

Sooo it's time to pick out a cam! And I am having a tough time with what cam I should run.

Here is a run down of what I have. 327, 9.1 (with 64cc heads), Vortec 180 cc heads, 60cc combustion chambers, RPM Air Gap intake, TH350, 2400 stall, 4.10 gears. It will have a 27" tall tire on the back. Oh and I might spray it with a shot anywhere from a 100 shot or 150 shot.

I have an idea of what I want to run but I am having a difficult time deciding.

Comp Cams, Xtreme Energy Hyd. Cam, Chev SB, .507/.510

Chev SB
Duration @ .050": 240/246
Adv. Duration: 284/296
Lift: .507/.510
Lobe Center: 110
Hydraulic 2300-6500, Street/strip, 2800+ stall, Rough idle

HRC, Cam & Lifter Kit, Chev SB, .510/.510, 302/302, 246/246

Chev SB
Lift: .510/.510
Adv. Duration: 302/302
Duration @ .050": 246/246
Lobe Center: 110
E.T. brackets, Strong mid & upper end power


Elgin, Hyd. Flat Tappet Cam & Lifter Kit, Chev SB, .487/.508

Chev SB
Lift: .487/.508
Duration @ .050": 234/244
Lobe Center: 114
2400-6500, Rough idle, Street/Strip, 2800+ stall

Crane, Energizer Hydraulic Cam & Lifter Kit, Chev SB

Chev SB
Lift: .500/.500
Adv. Duration: 302/302
Duration @ .050": 246/246
Lobe Center: 110
3500-6500, Good upper HP, auto 3000+ stall, 10.5:1

Brand: Summit

Product Line: Summit® Cam and Lifter Kits

Part Type: Camshaft and Lifter Kits

Part Number: SUM-K1107
Cam Style: Hydraulic flat tappet
Basic Operating RPM Range: 3,000-6,500
Intake Duration at 050 inch Lift: 234
Exhaust Duration at 050 inch Lift: 244
Duration at 050 inch Lift: 234 int./244 exh.
Advertised Intake Duration: 292
Advertised Exhaust Duration: 302
Advertised Duration: 292 int./302 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.488 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.510 in.
Valve Lift with Factory Rocker Arm Ratio: 0.488 int./0.510 exh. lift
Lobe Separation (degrees): 114
Intake Valve Lash: 0.000 in.
Exhaust Valve Lash: 0.000 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
Quantity: Sold as a kit.
Cam and Lifters, Hydraulic Flat Tappet, Advertised Duration 292/302, Lift .488/.510, Chevy, Small Block, Kit

[Prince Valiant]

Of all the cam's you've got listed, the elgin cam specing 234/244 looks like it'd work best...it recomends a higher stall, but in general, a 234 @ .050 cam should work fine with your combo.

Comp XE makes a similar cam to that one (compXE274 iirc)...but with a 110 LSA, which would work better with the better rod/stroke ratio afforded by the shorter stroke 327 you've got. Good cam with stock vortech heads.

Are the spring seats cut down to take the .480+ lift you'll get with any of the cams selected?

[Korndogg]

this is a cam right???

[GRAMPS SS]

yep...thats the new LS9 cam out of the new vette,,,,,big lobes

[CPonyGo]

bawahahahh

[Sprayaway Fox]

Irish when you stop I have a new cam for you that will definitley work with your combo. 302 510 single pattern hydraulic. Vortec heads on your engine wont need a huge crutch on the exhaust side because ports are more efficient. (similar to the exhaust side on BBC with the crutch) your looking another 15-20 hp over a fuelie head. You want to focus more at MIDLIFT flow numbers(stoplight, roll racing) since its a street car. Look for cams around 110 LSA because you still will have PB you dont have alot of cubes to keep the vacuum. Heads flow as good as a set of AFR's till about 510 lift. so keep the lift numbers around there. I ran a 230 480 in a chevelle with 3.73's and a 275 rear tire with a 327 fuelie head and it would lightem up at 25 mph roll. I did ALOT of research on the heads and combos for my own rides. Use thinnest head gasket to bump up the compression a lil. (Graphite Race Gasket)

Nitrous cams dont do do to much exept on on big hits(200 and above)
This cam would work good with your 4.11's and buzz it up to about 6400-6700
Put a 3500 converter in it sometime and it would REALLY strart hauling the mail!

[juicedimpss]

those cams are all a bit on the large side (duration) for that small engine with a tight convertor IMO

[Irish]

Of all the cam's you've got listed, the elgin cam specing 234/244 looks like it'd work best...it recomends a higher stall, but in general, a 234 @ .050 cam should work fine with your combo.

Comp XE makes a similar cam to that one (compXE274 iirc)...but with a 110 LSA, which would work better with the better rod/stroke ratio afforded by the shorter stroke 327 you've got. Good cam with stock vortech heads.

Are the spring seats cut down to take the .480+ lift you'll get with any of the cams selected?

The heads have been gone through a little bit. The heads were ran with a
.600+ lift cam.

[Irish]

Irish when you stop I have a new cam for you that will definitley work with your combo. 310 510 single pattern hydraulic. Vortec heads on your engine wont need a huge crutch on the exhaust side because ports are more efficient. (similar to the exhaust side on BBC with the crutch) your looking another 15-20 hp over a fuelie head. You want to focus more at MIDLIFT flow numbers(stoplight, roll racing) since its a street car. Look for cams around 110 LSA because you still will have PB you dont have alot of cubes to keep the vacuum. Heads flow as good as a set of AFR's till about 510 lift. so keep the lift numbers around there. I ran a 230 480 in a chevelle with 3.73's and a 275 rear tire with a 327 fuelie head and it would lightem up at 25 mph roll. I did ALOT of research on the heads and combos for my own rides. Use thinnest head gasket to bump up the compression a lil. (Graphite Race Gasket)

Nitrous cams dont do do to much exept on on big hits(200 and above)
This cam would work good with your 4.11's and buzz it up to about 6400-6700
Put a 3500 converter in it sometime and it would REALLY strart hauling the mail!

We'll talk.

[Irish]

those cams are all a bit on the large side (duration) for that small engine with a tight convertor IMO

What do you recommend?

[juicedimpss]

What do you recommend?

i think you can make great power with a cam in the range you are looking at,but you will need about another 1000 rpm of flash on the convertor.
also remember,cylinder pressure is power,with 9-1 it might be worth looking at something about 10* shorter than where you are at.
What does the rest of your exhaust system consist of?
you better have something VERY efficient if you plan on running a single pattern cam,especially on the bottle.

[Crawlin]

Irish, I doubt you'd notice a difference in driving the truck if you stepped up a bit in stall. i'll let you drive the ImpSS, this thing has like 3000stall in it, haha. Ask Tom even. We were laughing about it the first time we drove one.

[Sprayaway Fox]

Free cam( hydrualic) throw it in, put a 3500 converter someday and you wud be rocking. Ya got to ring the hell out of a small block with that cubes. Id rather put a converter in to go faster than swap another cam when engines still in it. Thing mite be soggy down low with your converter, but later go up on stall and be cooking with gas. I know I threw it in for ya, but everybodys reccomendation sounds good also. I always throw a lil bigger in cause I always end up going bigger every year. LOL Its never done.

[Irish]

Winner, winner chicken dinner!

The cam I am going with is:

HRC, Cam & Lifter Kit, Chev SB, .510/.510, 302/302, 246/246

Chev SB
Lift: .510/.510
Adv. Duration: 302/302
Duration @ .050": 246/246
Lobe Center: 110
E.T. brackets, Strong mid & upper end power

BIG THANKS goes out to SprayawayFox for the parts hook up! Let me know when you make it down to Milwaukee again, we'll grab some wings!

Also, I had a chance to see what is in his garage, let me tell ya that there are more than a couple street bruisers in there. Can't wait to see which one you bring down next season.

[70 cutlass 442]

/\/\ that still looks big, especially for your low static compression, perhaps you should look and see what the dynamic will be.

[Sprayaway Fox]

if your running a 64 cc now. and says ya goin down to a 60 cc you would be around 9.51's from a 9.0 then add a steel shim gasket which is a compressed thickness of 3.2 cc compared a race gasket 9.0cc volume so I would say you would be around 9.75 to 1 with this setup (steel). A regular Permatourque autozone gasket is going to have a even larger compressed thickness (which your stock block gasket prolly was) which would make your cc higher. With your smaller cc you would be having more velocity going in the chamber cause your bringing the head to deck hite down(more velocity in cylinder filling cause its a smaller chamber to fill/quench). I cant give you any specs on a FP permatorque though. I just push pallets for a living though. BUT LIKE I SAID EVERYBODYS RECCOMEDATIONS ARE ALSO GOOD. I guess it comes down to PERSONAL PREFERANCE. I am using a claimer KB piston with flat four groove piston(stock) for the calculations. You guys dont have 93 octane I think, 10.5-11.1 is what we get on 93 iron head SBC's by me. SOMEDAY will need a bigger converter, whew!Im done thinking now.

[Sprayaway Fox]

No problem, Also Ill let you know about draglites and slick set also, Im down with wings! Thank you for compliments on my rides also. Living STAG Im always in garage and its nice to know shit im working on is paying off. Thanx

[jersyboyy]

Thats a great cam, Im using that in my mild 357 right now nd I love it. Def a good cam esp for a 327.

Of all the cam's you've got listed, the elgin cam specing 234/244 looks like it'd work best...it recomends a higher stall, but in general, a 234 @ .050 cam should work fine with your combo.

Comp XE makes a similar cam to that one (compXE274 iirc)...but with a 110 LSA, which would work better with the better rod/stroke ratio afforded by the shorter stroke 327 you've got. Good cam with stock vortech heads.

Are the spring seats cut down to take the .480+ lift you'll get with any of the cams selected?