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Old 03-11-2007, 01:55 PM
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Whats a good cam

OK i know a lot of u good people wont agree with me,but i decided to upgrade my 1981 bone stock 305sbc with a cam.Now i like to get some ideas on a good cam to use,I would like basically to use from idle to 5500 rpm,then hopefuly reuse it in a 350 build over next winter.Right now in the car i have true duals with flowmaster exhaust and a edelbrock 2101 non egr intake.Thanks all.

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Old 03-11-2007, 02:27 PM
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Quote:
Originally Posted by stoney 81ta
OK i know a lot of u good people wont agree with me,but i decided to upgrade my 1981 bone stock 305sbc with a cam.Now i like to get some ideas on a good cam to use,I would like basically to use from idle to 5500 rpm,then hopefuly reuse it in a 350 build over next winter.Right now in the car i have true duals with flowmaster exhaust and a edelbrock 2101 non egr intake.Thanks all.
need more details. what car, rear gear ratio, trans , haders, no headers....The cam that is right for your stock 305 is not going to be best for your built 350.
A 204-214 .420 .442 112LSA cam such as sold by summit
SUM cam #1102
makes a good upgrade in a stock 305 without getting to crazy.
its cheap enough that you can go buy a new cam for your 350 later that will better match its requirements.
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Old 03-11-2007, 02:39 PM
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http://store.summitracing.com/partde...2&autoview=sku

For 15 bucks more you can get the lifters along with it, may as well replace those while you're at it.

many of those old stock cams peter out at 4500-5000RPM. Do your springs still have enough bounce left in them for 55-5800RPM shifts?

K
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Old 03-11-2007, 02:39 PM
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Quote:
Originally Posted by F-BIRD'88
need more details. what car, rear gear ratio, trans , haders, no headers....The cam that is right for your stock 305 is not going to be best for your built 350.
A 204-214 .420 .442 112LSA cam such as sold by summit
SUM cam #1102
makes a good upgrade in a stock 305 without getting to crazy.
its cheap enough that you can go buy a new cam for your 350 later that will better match its requirements.
Absolutely agree.
I might even go one cam smaller, since this is a 305 not a 350.

Every cam installation requires new lifters, period. Never reuse lifters.
Get the lifters and cam together as a set from the cam manufacturer.


added= personally I would not purchase any cheapo lifters. If the cam gets ruined you are looking at a complete engine tear down and clean and replace rings, bearings, etc.

Last edited by xntrik; 03-11-2007 at 04:30 PM.
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Old 03-11-2007, 06:54 PM
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sorry for being not fully descriptive in my post yes the cars has headers,automatic,and 2.56 rear end.
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Old 03-11-2007, 07:08 PM
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2.56? How much does the car weigh?
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Old 03-11-2007, 07:51 PM
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Quote:
Originally Posted by xntrik
Absolutely agree.
I might even go one cam smaller, since this is a 305 not a 350.

Every cam installation requires new lifters, period. Never reuse lifters.
Get the lifters and cam together as a set from the cam manufacturer.


added= personally I would not purchase any cheapo lifters. If the cam gets ruined you are looking at a complete engine tear down and clean and replace rings, bearings, etc.
Those are the lifters that come from the manufacturer for 15 bucks. The summit cam alone is $52.95, the cam and lifter kit is $69.95.

I've used the cam and lifter kits from them before, several times. They work just fine.

K
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Old 03-11-2007, 08:13 PM
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Quote:
Originally Posted by killerformula
Those are the lifters that come from the manufacturer for 15 bucks. The summit cam alone is $52.95, the cam and lifter kit is $69.95.

I've used the cam and lifter kits from them before, several times. They work just fine.

K
Lifter replacement is mandatory.

I know lots of people who have had success with those lifters also.

All I am saying is that I would not bet MY engine to save $40.

It is too much anxiety and expense to have to totally rebuild an engine because of a failed cam.

They might warranty the cam and lifters after a failure, but who will have to redo the engine?

JMO
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Old 03-11-2007, 08:56 PM
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Nobody said lifter replacement isn't mandatory.

I thought you said
Quote:
Get the lifters and cam together as a set from the cam manufacturer.
The summit lifters are inexpensive, as is the cam. I just don't understand what you're proposing. Using more expensive lifters with a cheap cam, or using the ones together as a set, as you said before?

K
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Old 03-11-2007, 09:57 PM
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Quote:
Originally Posted by killerformula
Nobody said lifter replacement isn't mandatory.

I thought you said

The summit lifters are inexpensive, as is the cam. I just don't understand what you're proposing. Using more expensive lifters with a cheap cam, or using the ones together as a set, as you said before?

K
The original entries contained an implication of a new cam without a lifter change.

Why trust cheapo lifters regardless of who sells them to you?

Please read my post # 8 again. I think it is quite clear.

That is what I believe. That is my opinion.

Last edited by xntrik; 03-11-2007 at 10:04 PM.
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Old 03-11-2007, 11:57 PM
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for your application being a 305 in a pickup with really really highway gears, I'd recommend a RV cam which is for higher torque, mpg, but don't expect finding much up high.
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Old 03-12-2007, 03:31 AM
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The vehicle is a 81 Trans am weight is around 3400lbs and yes i should of said a cam and lifter kit.Thanks again.
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Old 03-12-2007, 05:52 AM
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Don't forget intake manifold gaskets, water pump gaskets, valve cover gaskets, carb gaskets, timing chain cover gaskets, new timing chaing, etc....

What I'm trying to say is - if you plan on going to a 350 in the near future as long as the 305 cam keeps opening and closing the valves is it really that bad??
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Old 03-12-2007, 07:00 AM
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Quote:
Originally Posted by xntrik
The original entries contained an implication of a new cam without a lifter change.

Why trust cheapo lifters regardless of who sells them to you?

Please read my post # 8 again. I think it is quite clear.

That is what I believe. That is my opinion.
It always has to be an argument with you, doesn't it.

The reason I phrased my response as I did in #2, if you must know, is because Fbird 88 recommended buying just the cam. I know you have to change lifters, but I didn't want to come off sounding like a jerk. Apparently that's more important to some of us than others...

FYI I still don't think your posts are clear. First you say always use the lifters and cam as a set, then you contradict yourself and say don't use the lifters that come as a set with the summit set. If you're going to spend 80 bucks on comps lifters to go with your 55 dollar summit cam, you may as well just get the comps kit for 150 bucks for 30 dollars more.

K
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Old 03-12-2007, 07:10 AM
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The Summit 1102 is a great cam for a 305 with an auto and 2.56 gears. A friend had one in a '63 Bel Air with a boneyard 305, 200-4R and 3.08 gears. It hauled that old Bel Air around in OD with 4 adults in it NO problem.

A cam change will really bring that '81 to life. I did a swap in my then new '81 Z/28 with 305/ 4 speed and 3.42's and it was like a different car. The guy I sold it to came back from the test drive and told me it was the best running '81 350 he had driven so far. The look on his face when I told him it was a 305 was priceless. That cam was the old Engle RV-100H, very similar to the Summit 1102 except is was a single pattern cam, same exhaust specs as the intake. The 1102 has more exhaust duration and lift.
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