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Discussion Starter · #1 ·
I need a cam for a stock 300 hp 327 with a powerglide. I am looking at a cam with 214*/224*@50 and 442/465 lift. My question is will this cam idle in gear with a powerglide trans? My next choice would be 204*/214*@50 and 420/442 lift.
 

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I need a cam for a stock 300 hp 327 with a powerglide. I am looking at a cam with 214*/224*@50 and 442/465 lift. My question is will this cam idle in gear with a powerglide trans? My next choice would be 204*/214*@50 and 420/442 lift.
I would go with the comp cam. 268 extrem energy cam, 2 cents.

 

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both cams will work good and idle nice especially with a 112 LSA. I always thought the stock cam in a 300hp/327 was over rated. Maybe 250hp but 300 I think not. These cams will help achieve a real 300hp IMHO v.s. the stock cam.

Stock cam specs are,correct me if im wrong are the same specs as the LM1 GM crate 350 motor with .195/.202 duration .383/.401 lift? Those cams are a nice step up and will idle in gear fine.

My 355 has a mini-blower on it,I run a Summit/crane grind cam with .224/.234 druation @.05 .465/.488 lift on a 114. It idles smooth and doesn't have much lope at all. The 114 LSA helps out with idle quality and range of powerband but blower mellows it out too though...
 

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Your second choice is the best, unless you are changing convertors and gears. With the glide, it's kinda like taking off in second with other gearboxes and you'll be giving up a bunch of 0-30 punch for something that won't make it back up on the top end in something like a quarter mile.
 

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What is your comression ratio? Does it have rebuilder pistons that sink them in the hole .040"? The reason I ask is because while the stock 300 hp was close to 10:1. By the time you get done with the rebuilder pistons and a standard .039" compression gasket you are closer to 9:1. If you are around 9:1 compression I would seriously look at the ISKY Mega 264 at 214/214 on 108 LSA
 

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Discussion Starter · #8 ·
What is your comression ratio? Does it have rebuilder pistons that sink them in the hole .040"? The reason I ask is because while the stock 300 hp was close to 10:1. By the time you get done with the rebuilder pistons and a standard .039" compression gasket you are closer to 9:1. If you are around 9:1 compression I would seriously look at the ISKY Mega 264 at 214/214 on 108 LSA
Stock pistons, 10:1
 

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Both cams will idle in gear. It just depends on what idle speed. They are both pretty mild but the powerglide will like the smaller cam to get moving. I'm surprised its not pinging with 10:1 compression and the stock cam. If you truly have 10:1 compression you can get by with a larger cam. I would still look at the ISKY Mega 264 or, if you don't mind a solid cam Clevite has a cam p/n 229-1998 with 218/228 @.050 on 114 LSA that should do well in this application and will idle smooth. The solid will act like a hyd with 6-8 deg less duration but should have a little more torque. FWIW I have a 56 Chevy with a 327 /700R4 combination that runs well with a solid at 225/225 @ .050 on 108 LSA but it has a little lope.
 
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