305 camshaft upgrade

305 camshaft upgrade DEFAULT

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Re: Performance camshaft for stock 305??


So your saving up for your 383 build and want to spend money milling and installing larger valves in 305 heads? That makes no sence at all. Buy a cheap cam if you must, otherwise stop wasting AFR money on it.
Yes the vortec 305 is a roller block. Factory ramjet 350 cam is puny and not really an upgrade. Perhaps an oem LT1 or LT4 cam, otherwise most aftermarket rollers cost bigger money.

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What camshaft should I put in my Chevy 305 while it's apart?

Re: What camshaft should I put in my Chevy 305 while it's apart?

IMO one of these would be your best choice for a camshaft, these are factory hi=perf designs, they work well without having to worry about changing springs, or anything else, nor do they need any machine work because of too much lift, they fit right in, and a lot of the replacement engine builders use these on a regular basis in their hi-perf engines, I've used the L79 myself in a 262 Chevy V8 (otherwise stock) which achieved 7k rpm with a 2bbl carb, & dual exhaust!, it has plenty of power for what you need, it was used in the 327/325hp & 327/350hp motors. Anything more is overkill, unless you like having engine work done, raising compression, & putting a large 4bbl on:

03863151 L-79 350HP, 327 Hydraulic Flat Tappet
This hydraulic flat tappet is used on the 65-67 Corvette and Chevy II L-79. It has excellent power and torque (ID# 3863152). The duration at lash point in degrees (intake/exhaust) is 320/320; duration at .050? tappet lift (intake/exhaust) is 221/221 and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 447/447. Valve lash is zero/zero and lobe centerline is 114 degrees. --

03896962 L-82 330HP, 350 Hydraulic Flat Tappet
This hydraulic flat tappet is used on the 68-81 L-46 and L-82 Corvette. The duration at lash point in degrees (intake/exhaust) is 312/312; duration at .050? tappet lift (intake/exhaust) is 222/222 and maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 450/460. Valve lash is zero/zero and lobe centerline is 114 degrees.

http://www.sallee-chevrolet.com/Camshafts/index.cfm

 

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#661775 - 03/20/0912:28 AMlooking for a cam for stock 305 h.o.  
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ive recently bought a great 85 ss with 80,000miles on original motor i dont want to upgrade to a 350 due to value issues and how good she runs so i wanna add more horse to a 305 you know intake carb headers but i want to keep the ho heads .

my question is whats a good cam for her i read that a l31 cam from a vortec would be good and would i have to buy some new lifters for this thanks for the help


#661817 - 03/20/0902:17 AMRe: looking for a cam for stock 305 h.o. [Re: OpalgreySS]  
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the L31 cam is a roller, so that would get kind of spendy on an old block.
the stock cam is actually pretty decent compared to the other cams of the area. i'd leave the motor alone, and concentrate on getting more air in and out, starting with the exhaust side of things. headers and better mufflers are always a good start.



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#661818 - 03/20/0902:19 AMRe: looking for a cam for stock 305 h.o. [Re: OpalgreySS]  
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Do you still run the CCC system.



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#661831 - 03/20/0903:03 AMRe: looking for a cam for stock 305 h.o. [Re: Wudce]  
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Do you still run the CCC system.



yeah, if not there is like 234123414567 more cams you could get lol


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#661860 - 03/20/0904:56 AMRe: looking for a cam for stock 305 h.o. [Re: MrTurboHappy]  
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yeah everything is stock i just saw a good deal on 1 anyone got some headers for sale


#661862 - 03/20/0905:09 AMRe: looking for a cam for stock 305 h.o. [Re: OpalgreySS]  
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youre right about getting air to it i just the l31 cam on ebay for 15 bucks and thought i would get it but i dont want to hurt the engine so youre saying the stock cam is prety good


#661868 - 03/20/0906:41 AMRe: looking for a cam for stock 305 h.o. [Re: OpalgreySS]  
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Here's a link that should help you 305 build up . Also if you swap out the cam you should also use a good aftermarket timing chain set, the stock GM set has retarded timing that really kills the stock engine's performance.



SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.

2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes, and Jmod.

Never argue with an idiot.
They will just drag you down to their level and beat you with experience.

#661872 - 03/20/0907:43 AMRe: looking for a cam for stock 305 h.o. [Re: Buick Runner]  
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thanks for the advice i read the link and it had alot of emissions passing parts. i dont require emisson where i live(LOL) but yeah i reading up on the cams listed now buickrunner what do you think about the l31 cam


#661878 - 03/20/0910:21 AMRe: looking for a cam for stock 305 h.o. [Re: OpalgreySS]  
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It's hard to move air through a small-bore motor with a restricted valve area like the 305. You need a bigger cam to make this small cylinder work, but there are limits due to the small displacement. Fortunately, the relatively long stroke for this displacement engine helps low-end torque, so the engine isn't all that cam sensitive. Along with a cam upgrade opening up the exhaust i.e headers and good flowing mufflers you be right on track.



Stock 86 Monte SS

#661887 - 03/20/0911:44 AMRe: looking for a cam for stock 305 h.o. [Re: Wudce]  
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cool iv been eyeing this what tell me what you think guys

Used Crane Energizer camshaft. Grind # 272 H10. Part # 100052. 216/216 @.050, 272/272 adv. duration, .454/.454 lift, 110 lobe seperation, rpm range 1600-5400


#661901 - 03/20/0912:09 PMRe: looking for a cam for stock 305 h.o. [Re: OpalgreySS]  
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Unless the lifters come with that used cam and have been kept in the order they ran on the cam's lobes. Don't buy it. Never put new lifters on a used cam either.


#661931 - 03/20/0901:53 PMRe: looking for a cam for stock 305 h.o. [Re: Retro]  
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I would not run that cam with stock heads plus the grind on that cam is at least a 30 year old design. This is a better design for a stock head.

http://store.summitracing.com/partdetail.asp?part=LUN-60100LK&autoview=sku

This next one has a little less LSA which will be a little more aggressive and will still work with the computer. Remember that the dyno sheet listed in the link is for a 355 not a 305 so the HP/TQ numbers would be less.

http://www.compcams.com/Technical/DynoSheets/XE256H-10_001.asp



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#661965 - 03/20/0903:07 PMRe: looking for a cam for stock 305 h.o. [Re: OpalgreySS]  
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I feel you be better off with a dual pattern cam one that has less duration and lift on the intake side to help build more cylinder pressure since we dealing with a small bore engine and more lift and duration on the exhaust side, which will do a better job of clearing exhaust from the combustion chamber. The cam I look at if I was to build my 305 is the GM 24502476. This is a modern version of the old L79 327 Camshaft. It's profile has been slightly modified for extra low end torque and drivability. This is a nice all around street cam, that produces bottom end power and has a nice sound.



Stock 86 Monte SS

#662021 - 03/20/0905:35 PMRe: looking for a cam for stock 305 h.o. [Re: Wudce]  
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I am using a Crane's Emission Legal Powermax cam, grind number 2040. When using the computer you need a cam that pulls enough vacumm to make the MAP sensor happy. The L31 cam is a roller lifter cam, your 305 has a flat tappet lifter cam and it is a older block not designed for roller lifters. However they do sell roller lifter sets designed to fit a older non roller SBC block but they cost $583+ while a flat tappet cam set (camshaft, flat tappet lifters, break in lube) will cost about $180.



SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.

2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes, and Jmod.

Never argue with an idiot.
They will just drag you down to their level and beat you with experience.

#662038 - 03/20/0906:44 PMRe: looking for a cam for stock 305 h.o. [Re: Gruvin]  
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thanks for all the advice guys think ill go with the summit


#662057 - 03/20/0907:37 PMRe: looking for a cam for stock 305 h.o. [Re: OpalgreySS]  
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Both of them Summit cams *aka* Crane with there 112 lobe separation would work great. You might also want to go with a set of 1.6 roller tips rockers just to give it abit more lift.Goodluck with your build and let us know how it turns out.



Stock 86 Monte SS

#662062 - 03/20/0908:06 PMRe: looking for a cam for stock 305 h.o. [Re: Wudce]  
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Hi 80's,

May I offer some general philosophical advice here? Once you open this can of worms, there's no going back. You'll swap the cam, and be modestly happy. Then you'll do the intake and exhaust things outside of the motor, and be a little happier. Then the itch will grow to the point you swap to much better heads, and you'll be a bunch happier, at which point you'll think, "Wow, I could have put in a 350 and saved money in the long run!"

Three years later you'll say, "Wow, I could have put in a 454 and saved money in the long run!"

Three years later you'll say, "Wow, I could have put in a blown, nitrous-injected 572, with a cage/parachute and back-halved 9" Ford, and saved money in the long run!"

In other words, be very careful what you start here. Stamp collecting is a bunch cheaper. Remember, I warned you...

Happy Friday,
MAP





Last edited by MAP; 03/20/0908:10 PM.

#662066 - 03/20/0908:21 PMRe: looking for a cam for stock 305 h.o. [Re: MAP]  
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yeah ill post some pic these weekend of my ss. and yeah i want to put a 350 or 400 in it but some suggest i should keep the original in it. i just joined this site thurs. its amazing


#662070 - 03/20/0908:40 PMRe: looking for a cam for stock 305 h.o. [Re: OpalgreySS]  
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Before swapping engines you should always check your local emission laws and see how well enforced they are. In my state they say I can't have anything bigger than the stock 305 but since they don't bother to check casting codes (poor enforcement of the law) I could swap in a 327, 335, 350, 383, or a 400 and as long as I have it stock looking with all the smog and computer stuff on they will never know. However something like a big block will stick out like a sore thumb to most inspectors and get you failed.



SBC powered 1987 Regal with TES headers, ZZ4 intake, ZZ4 PROM chip, mini starter, THM2004R, 2500 stall converter, 2040 cam, CCC system, and 3.73 posi rear.

2008 ex NPS P71 Crown Victoria, cop motor, cop shocks, cop brakes, and Jmod.

Never argue with an idiot.
They will just drag you down to their level and beat you with experience.

#662074 - 03/20/0908:59 PMRe: looking for a cam for stock 305 h.o. [Re: Buick Runner]  
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we dont require emissions where i stay only neighboring counties to nashville which excludes me


#662232 - 03/21/0903:41 AMRe: looking for a cam for stock 305 h.o. [Re: OpalgreySS]  
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put the summit k-1105 in my brothers stock engine, runs good but its now harder to start. running no ecu or emissions


#662438 - 03/21/0908:44 PMRe: looking for a cam for stock 305 h.o. [Re: Wudce]  
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Both of them Summit cams *aka* Crane with there 112 lobe separation would work great. You might also want to go with a set of 1.6 roller tips rockers just to give it abit more lift.Goodluck with your build and let us know how it turns out.



actually, the generic cams are made by Speed Pro, and you can order them for about the about same price locally at your favorite parts store or engine builder.
i have the Speed Pro .420/.443 cam (which is the very same grind sold by Edelbrock as the Performer and the one that was previously linked to)in my 74 Monte. i got the cam, lifters, timing set, oil pump, and engine gasket set for $120 to my door (shipping included) from Northern auto Parts 2 years ago. and these were all name brand USA made parts, and not some cheap Chinese crap.

Last edited by novaderrik; 03/21/0908:45 PM.


http://good-times.webshots.com/album/568279446VvVgWO

86 MC SS- rough, but fixable. looks like something Dale Sr might have driven back to the transport after a race at Bristol.
84 regal T Type with 64,000 miles and almost no options
74 Monte Carlo cruiser


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Upgrade 305 camshaft

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