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  #1 (permalink)  
Old 06-04-2004, 12:16 PM
oldsgeek's Avatar
81 olds cutlass, 350 chevy
 

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lump lump factor

the track is 50 miles away , so i need to get it there but by no means is it going to be a daily driver ! so with that in mind .......O , and it's more for look's and sound than anything so im look'n for the biggest cam with a 2200 stall . this is some im looking at .......................

Specifications:
* Advertised duration: 242 intake/252 exhaust
* Duration at .050 in. cam lift: 184 intake/194 exhaust
* Gross valve lift: .368 in. intake/.398 in. exhaust
* Lobe separation: 109 degrees
* RPM range: 1,000 to 3,000
* Ground with a 5 degree advance

Specifications:
* Advertised duration: 252 intake/262 exhaust
* Duration at .050 in. cam lift: 194 intake/204 exhaust
* Gross valve lift: .398 in. intake/.420 in. exhaust
* Lobe separation: 112 degrees
* RPM range: 1,000 to 3,200
* Ground with a 5 degree advance

Specifications:
* Advertised duration: 262 intake/272 exhaust
* Duration at .050 in. cam lift: 204 intake/214 exhaust
* Gross valve lift: .420 in. intake/.442 in. exhaust
* Lobe separation: 112 degrees
* RPM range: 1,500 to 4,000
* Ground with a 5 degree advance

Specifications:
* Advertised duration: 272 intake/282 exhaust
* Duration at .050 in. cam lift: 214 intake/224 exhaust
* Gross valve lift: .442 in. intake/.465 in. exhaust
* Lobe separation: 112 degrees
* RPM range: 2,000 to 4,500
* Good idle quality
* Ground with a 5 degree advance

Specifications:
* Advertised duration: 282 intake/282 exhaust
* Duration at .050 in. cam lift: 224 intake/224 exhaust
* Gross valve lift: .465 in. intake/.465 in. exhaust
* Lobe separation: 114 degrees
* RPM range: 2,200 to 5,200
* Ground with a 5 degree advance

Specifications:
* Advertised duration: 282 intake/292 exhaust
* Duration at .050 in. cam lift: 224 intake/234 exhaust
* Gross valve lift: .465 in. intake/.488 in. exhaust
* Lobe separation: 114 degrees
* RPM range: 2,200 to 5,700
* Ground with a 5 degree advance

and i don't need allot of vacuum,but i need a little of the lump lump factor

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Old 06-04-2004, 12:22 PM
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Sorry if I sound dumb but what kind of engine is it?? Heads, Intake etc. I need some more info to help.
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Old 06-04-2004, 12:40 PM
oldsgeek's Avatar
81 olds cutlass, 350 chevy
 

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O' ya ....... ha ha ..... you don't know what i have !!! that's not good ! ............ any way ... it's a SBC 283 V8 all stock, it has new valve springs , new timing Chane , headers , and a "for look's only single 4 tunnel ram". in my Project Journals is a pic of it . and like i Say , it's for show more than anything.....
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Old 06-04-2004, 02:26 PM
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Have you thought of a 268h comp cam? It's supposed to have a noticeable lope to it in a 350, so I figure it should lope pretty good in a 283. This is the cam I am planing to run in my 350. For a lumpy idle you want to keep the lobe seperation in the 110 and down range.

The specs on the 268h are:
218 @50 degrees
.454" of lift
110 Lobe Seperation

Someone let me know if i'm wrong here.

Good Luck
Joel

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Old 06-04-2004, 02:49 PM
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Well your going to have a problem. The heads on you stock 283 have very small valves (1.72"/1.50" i think) and are not usable in any kind of performance application. A mild set of performance heads will be needed, even a stock set of heads with 1.94" 1.50" valves would be a large improvement. Don't take this the wrong way but you're heading towards running a poorly matched set up. Even if you ran the most radical cam (which isn't really that radical) on your list the tunnel ram will be hurting your power. You'll need a cam that comes in at a higher rpm with a stall speed to match, thats how you make a 283 fast, rpms. However your running a stock bottom end so that can't be done safely. I don't really know where to tell you to start. I need to know what kind of car this is in, rear gears, trans, and what type of 1/4 mile time you want.


Mike
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Old 06-04-2004, 02:55 PM
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Did you read the part about "looks only"



Overlap figures of 75 or more will get you what you want without going for a longer cam. Edies Performer RPM will siut you fine.
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Old 06-04-2004, 03:01 PM
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the track is 50 miles away , so i need to get it there but by no means is it going to be a daily driver !


Did you read that part? His posts gave me the impression he wanted it to be fast and sound an look cool, I guess we interpreted it differently.
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Old 06-04-2004, 03:10 PM
oldsgeek's Avatar
81 olds cutlass, 350 chevy
 

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i know it's not going to be super fast ! it will have a 50 or 75 shot of nos later , so it's my fault ..... any how ... a rpm cam is 234/244 488/510 @ 112 , so the cam i have listed .........

Specifications:
* Advertised duration: 282 intake/292 exhaust
* Duration at .050 in. cam lift: 224 intake/234 exhaust
* Gross valve lift: .465 in. intake/.488 in. exhaust
* Lobe separation: 114 degrees
* RPM range: 2,200 to 5,700
* Ground with a 5 degree advance

is a good one ? how about the stall of 2200?
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Old 06-04-2004, 07:49 PM
oldsgeek's Avatar
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i was looking at some info and saw this ? single-pattern cams have tighter lobe separations, for added torque, mid-range power, throttle response and that popular "lumpy idle" ..but i was told that the dual -pattern was the "lumpy " one?
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Old 06-04-2004, 09:57 PM
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The first cam listed is a stock 305. The second cam is the standard stock small block cam. WIth the limited info we have about your combination I would go with the third cam that you've listed. It will have just a little lope to it in a 283.
What you need to keep in mind is that you're running a 283. While a cam like a Comp cams 268 or one like it is the choice for some who wants just enough cam to make it lope with a 350 the same came will act like a larger cam in a 283. You'll need to be carefull or you'll kill the bottom end torque.
Don't think that a 2200 rpm stall convertor will let you get away with over camming your motor. Engine torque is a big factor when rating a torque convertor. When they list a convertor as a 2200 rpm stall they are assuming that your going to put it behind a 350 with a mild cam and be putting it into a 3200-3800 pound car. Any good torque convertor vendor can make you a convertor that will stall at 2200 rpm with the cam of your choice (within reason) for extra $$$. The third cam will work ok with a stock convertor or the one you listed as there won't be much difference between them.
There will be people saying that you can go with a little bigger cam than I picked. Sure you can go bigger but I don't know how much gear you have, how many rpm your willing to turn it, if you're willing to go with more stall speed, power brakes or not, and have you ever tuned a motor that does pull much vacuum.
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Old 06-04-2004, 11:08 PM
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Sorry Ghetto, sounded kind of mean didn't it.

To me, if the engine in question is fast, than it looks better than something with a long cam and runs 20 somethings.

Goin fast is looking good.
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Old 06-05-2004, 12:29 AM
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I think you will like the car a lot better if it had the power to back it up. You are going to really need better heads. Anything would be better than those stockers. Would some 350 heads work???
2200 is a pretty mild stall so don't go to radical on the cam. Maybe a xe262h cam. Not trying to insult you or anything but making a car look fast and not backing it up with power kinda reminds me of the ricer mentality.
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Old 06-05-2004, 09:08 AM
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81 olds cutlass, 350 chevy
 

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o hell ! i cant have that ! this is the one i think will sound and run the best , what do you guy's think ? ...............

Specifications:
* Advertised duration: 272 intake/282 exhaust
* Duration at .050 in. cam lift: 214 intake/224 exhaust
* Gross valve lift: .442 in. intake/.465 in. exhaust
* Lobe separation: 112 degrees
* RPM range: 2,000 to 4,500
* Good idle quality
* Ground with a 5 degree advance


lobe is 112 , that is keeping it tighter

dual -pattern , heads work better






would v-tech heads work ? i know a set for 100.00$ new
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Old 06-05-2004, 09:30 AM
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$100 for a new pair of Vortecs GET THEM! They will really help that motor out. Vortecs have excellent flow rates in stock form.

johnsongrass1 I just re-read my second post and confused myself a little. "Be fast and sound an look cool" I should have said be fast but look and sound like it's running 10's in the 1/4.
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Old 06-05-2004, 10:04 AM
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81 olds cutlass, 350 chevy
 

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yeah this guy built this motor and put the Vortecs on , but when he started it it started knocking . so he pulled it out and got a new GM 350 crate motor . anyway all he wont's for the motor is 100.00$ .. but with the small bore of the 283 will it work ?
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