Is this a good Hydro Cam? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dion · 03-24-2002, 11:50 PM

Duration .050 Int. 204
Ad. duration 270
Lobe spread 112
Valve lift .420
Cam litf .280

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Restored 72 Cheyenne C20
San Diego, CA

**MikeB** · 03-25-2002, 09:55 AM

It's a mild performance cam (assuming you have a 350) that will work well with stock intake and exhaust manifolds, and prox 8.5:1 compression. Peak torque is probably around 3000 PRM, with peak hp at 4000. You will have a smooth idle and lots of low end torque. For comparison, here are the cam specs for the very mild 350 "Goodwrench" crate engine:

Camshaft lift: 0.390” Int/ 0.410” Exh
Duration @ 0.050”: 195° Int/ 202° Exh
Lobe center: 115 degrees

The more agressive exhaust lobe compensates for "lazy" stock exhaust ports.

For some really good cam info, that actually takes engine size into consideration, check out: http://www.crower.com/misc/m_cat.shtml

Then go to Page 24.

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MikeB
69 C-10 Fleetside, mild 383, Dart Iron Eagle 180cc heads, Crane Energizer 266 cam and 1.6 roller rockers, Edelbrock Performer manifold and 600cfm carb, HEI w/ MSD components, 1986 front spindles/disc brakes, Vintage Air in-dash, lowered 2"/3".

Frank_Zeller · 03-25-2002, 10:15 AM

Mike, do you know the cam specs for the GM 305 create motor?

dion · 03-25-2002, 10:52 AM

Thanks Mike.

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Restored 72 Cheyenne C20
San Diego, CA

lukecp · 03-25-2002, 12:45 PM

I have a simillar cam in my truck's 350, 204 intake/214 exhaust duration @.050 lift, and the valve lift is around .444/.443 if i remember correctly. I am happy with it, it has alot of power (about 300 horses in my engine) and great low end tourqe. From 2000-3000 rpm, in the highway cruise RPM's, it has plenty of power for the pulling hills.

------------------
Lucas

drop_shift@hotmail.com

My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, 300 HP thanks to a few go-fast goodies. Ochre with a white top. Future plans include a frame off restoration, and maybe a blown 383.

03-24-2002, 11:50 PM	#1
dion 72 Cheyenne Join Date: Oct 2001 Location: San Diego Posts: 2,086	Is this a good Hydro Cam? Duration .050 Int. 204 Ad. duration 270 Lobe spread 112 Valve lift .420 Cam litf .280 ------------------ Restored 72 Cheyenne C20 San Diego, CA __________________ Burnout Idle 1972Cheyenne 1966/67Stouts

03-25-2002, 09:55 AM	#2
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,597	It's a mild performance cam (assuming you have a 350) that will work well with stock intake and exhaust manifolds, and prox 8.5:1 compression. Peak torque is probably around 3000 PRM, with peak hp at 4000. You will have a smooth idle and lots of low end torque. For comparison, here are the cam specs for the very mild 350 "Goodwrench" crate engine: Camshaft lift: 0.390” Int/ 0.410” Exh Duration @ 0.050”: 195° Int/ 202° Exh Lobe center: 115 degrees The more agressive exhaust lobe compensates for "lazy" stock exhaust ports. For some really good cam info, that actually takes engine size into consideration, check out: http://www.crower.com/misc/m_cat.shtml Then go to Page 24. ------------------ MikeB 69 C-10 Fleetside, mild 383, Dart Iron Eagle 180cc heads, Crane Energizer 266 cam and 1.6 roller rockers, Edelbrock Performer manifold and 600cfm carb, HEI w/ MSD components, 1986 front spindles/disc brakes, Vintage Air in-dash, lowered 2"/3". __________________ Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!

03-25-2002, 10:15 AM	#3
Frank_Zeller Registered User Join Date: Jun 2001 Location: Austin, Texas Posts: 796	Mike, do you know the cam specs for the GM 305 create motor? __________________ 69 SWB C/10 5-6 drop 700R4 69 Firebird Convert 455 4 spd 70 Torino GT Convert Austin-Texas

03-25-2002, 10:52 AM	#4
dion 72 Cheyenne Join Date: Oct 2001 Location: San Diego Posts: 2,086	Thanks Mike. ------------------ Restored 72 Cheyenne C20 San Diego, CA __________________ Burnout Idle 1972Cheyenne 1966/67Stouts

03-25-2002, 12:45 PM	#5
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	I have a simillar cam in my truck's 350, 204 intake/214 exhaust duration @.050 lift, and the valve lift is around .444/.443 if i remember correctly. I am happy with it, it has alot of power (about 300 horses in my engine) and great low end tourqe. From 2000-3000 rpm, in the highway cruise RPM's, it has plenty of power for the pulling hills. ------------------ Lucas drop_shift@hotmail.com My Daily-Driver: '72 Chevy LWB Custom/10. Rebuilt 350, 300 HP thanks to a few go-fast goodies. Ochre with a white top. Future plans include a frame off restoration, and maybe a blown 383. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg



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