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Old 12-20-2008, 12:48 AM
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Cam Selection

Hey guys i know this uestion gets asked a lot but i was wondering i suck at the numbers for cams and i was just wondering what the best cam would be for me right now i have a stock converter and 3.73 posi outback with a t350 tranny 350 with 305 heads holley contender manifold soon to be edelbrock performer rpm air gap flowtech headers and a holley 600 i just want a good cam that will give me a nice boost in power and have a lil bit of a beefy idle any idea what torque converter i could use too? input would be great thanks so much everyone.

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Old 12-20-2008, 04:29 AM
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I guess that depends on what you want it to do. Comp cams 268 cam is a good perfomance street cam with a choppy idle. It can be used with a stock converter.It is about as big as you want with a stock convertor. I had a stock smog 350 that worked well with a 262xe comp cam.(edel 600 carb and intake with 2.72 gears,350 turbo in a 4000lbs car. it got 20-22mpg) It is noticable but not lumpy. Those 305 heads won't breathe on the top end so a high rev cam is pointless.
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Old 12-20-2008, 05:59 AM
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Yes I think that Comp cams XE262H Would be hard to beat with your set up as is . Here is the Spec card http://www.compcams.com/Cam_Specs/Ca...x?csid=85&sb=2
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Old 12-20-2008, 07:11 AM
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Those two suggestions are not bad at all, I also like the Elgin 274/274 cam0 its the same as the 274H06. i think its tighter LSA would be good for those weak heads, but are valid cams
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Old 12-20-2008, 08:59 AM
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With what you have now, I would go with a cam like the Comp XE262 as well.
Other good simular alternatives are Crane H-272-2 Comp 275DEH, Comp 265DEH, Lunati Voodoo 262

Camshafts do not work in a vacuum, meaning that it is part of a complete system that makes the motor create motor power.
You need to improve the flow of the cylinder heads you have.
305 heads while they boost the compression ratio on a 350, have very modest flow in stock form. You can fix that. With full effort porting and larger 1.94x 1.60" valves.
Once thats done you could run a larger cam and make more power.
The cam, heads induction and exhaust all have to work together.
A cam much larger than what is being suggested here requires a new high stall torque converter to get best results.

The comp XE262H-10 will also work very will with a RPM manifold and if you were to improve the ehads with porting. A good overall choice for your Monte. Works with a stock or mild stall converter.

If you just stuff a big racey cam in this motor, you will be very disappointed.
You'll get the rough racey idle but not the performance you're after, without the rest of the combination.
If you were to pull the heads and improve them or change to a true high performance head and change the converter stall (3000-3500stall) I can recomend a more radical matching cam.

Again as it stands now, a Comp XE262 is a very good choice. Some new fresh hi perf valve springs would be nice too.

Last edited by F-BIRD'88; 12-20-2008 at 09:15 AM.
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Old 12-20-2008, 01:39 PM
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thanks for all the input any idea how i would go about putting the bigger valves in? thats what i intended to do i just dont know where to start ie( valve seats and whatnot)
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Old 12-20-2008, 01:43 PM
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i was looking on summit racing and it sead for a 305 engine or a 350 would it make a difference? my 305 heads are not as tall as the 350's
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Old 12-20-2008, 01:53 PM
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For your small bore 305 Street Build the Stock 1.84" in/1.50"ex Valves will be Fine . Just have the valves checked and do some gasket port matching . Have a Clean up cut to the deck . Install new Valve seals and Springs . You will be Fine and make good Power with that 305 . Now a 350 would be a more Powerful build . The 305-350 Heads are the same height .
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Old 12-20-2008, 01:56 PM
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well the block is a 3 fiddy i just ported out the heads a while back just gotta get new seals and springs as you said
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Old 12-20-2008, 01:57 PM
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im just a lil confused as to porting the bowls all i did was the intake and exhaust ports
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Old 12-20-2008, 02:08 PM
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Here are some good Links that will help you . Porting is an art http://www.activeboard.com/forum.spa...picID=23006114
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Old 12-20-2008, 02:21 PM
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for use on a 350 for best power I like to go with a 1.94x 1.60" valve set.
Requires a new valve job. Full porting is recomended. Not just the port openings. (if you want power) The meat and potatoes os deep in the ports around the valve guide boss and bowl.
Make 'em look like this.





Which "305 heads" do you have on your 350? What is the head casting number? (under the valve cover)

Last edited by F-BIRD'88; 12-20-2008 at 02:26 PM.
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Old 12-20-2008, 02:31 PM
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If you were to port your heads like this and swap the torque converter for a high stall, a Comp 280H Magnum 12-212-2 or Isky 280 Hyd "Mega Cam" #201281 works well. Both these cams have a cool idle, but work best with improved heads and a high stall converter.
If you're not going to burp for the high stall converter, stay with a Comp XE262 cam.
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Old 12-20-2008, 03:59 PM
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dont remember for sure they are hipo 305 heads from the 84 monte i believe this is the casting 14014416
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Old 12-20-2008, 05:02 PM
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Quote:
Originally Posted by 84 Monte SS
dont remember for sure they are hipo 305 heads from the 84 monte i believe this is the casting 14014416
They work best (on a 350) with larger 1.94x 1.60" valves and a good full port effort like in the pictures. Engines need (more than stock) port airflow to make increased power.
If you're willing to put the effort in, these heads work pretty good.

http://www.wildgooseperformance.com/ These guys are local to you and are real good with this stuff.
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