with my mods below im looking into getting a cam with a duration at .050 to be 230 and life at .480, lobe separation 110 and world products torques. would this be a good combo. if not, which cam should i get, i am set on gettign those heads because they aren't that expensive.

heads
http://store.summitracing.com/partde...L%2D042660%2D1

 

i was looking at the comp cams 280H

 

the computer might like a little more LSA that 110, maybe get the same lobes ground on a 112.

 

well ill be burning my chips so i will find a way to make it run.

 

110 lsa is as low as you wanna go on the street.. i would not recommend it though. He's rite about 112 lsa. Mush more streetable for your application... remember.... 305's are not race motors and bigger is not always better when it comes to a cam.

 

actualy rethinking this, most people would probably be more happy with the feel of a wider LSA, it will give you a more broad torque feel, and less of a spike. the reason i say i would not go tighter than 112, is for the computer. if you were running a carb, i would go 110, or heck even 108, but the fact is teh computer just won't be able to deal with tight LSA. all of us are at the mercy of what the computer and sensors can read, yes you can modify the chip, yes you can rework the fuel tables, the spark tables ect. but if your MAP sensor cannot accuratly read the vaccume signels, it because VERY hard to tell the computer what to do.

 

i have a 357 not a 305. thats y i was looking at the comp 280H

 

Why not save some money and put on some 1.6 ratio roller rockers. You will achieve virtually the same lift as the cam you are looking at (477/490), better duration numbers (214/222 @.050"lift) while maintaining the computer friendly 114 degree LSA. This combination will make much more low end torque while only sacrificing a few peak HP. I think you will be much happier with this setup than than the Comp cam unless you are willing to give up performance for a lopey idle.

 

so with 1.6 rockers it will be close to that cam. how much does my rebuilt Lo5 handle. lift wise. and do i have to drill the pushrod hole for clearance.

 

That depends on which heads you choose. I see in your sig that youre gonna do heads too. It is important that the head, cam intake combo is matched for the RPM range you will be operating in. The LT1 cam w/1.6 rockers is going to perform in the 2000-5000 range. I'm going to assume from your sig that your Edelbrock intake is a dual plane intake (which?) so that should be operating in the same range. Your head choice should be made with this in mind. You don't want to kill the combo by picking heads that will flow too much or you will kill the low end, however if you keep the stock TBI heads you will not flow enough and choke the engine. The Air Flow Research 180cc street heads would be a good choice. As for clearancing the pushrod holes, that should be no problem with any performance head until you get to about .550 lift or more, depending on the head. Happy shopping!

 

but will my stock heads work with 1.6 rockers. i was thinking about the world heads.

 

your stock heads won't work with 1.6 rockers with the cams being talked about, without having some machine work done. but if you are going through all the time and trouble to upgrade this stuff, leaving the stock heads is really going to kill the upgrades.

 

I had a cam in my 350 that was 210/215 with 110°LSA. It was a bitch to tune. Don't do it. Get a cam with at least 112°LSA.

 

that is a good example, 210/215 is pretty mild in a 350, but that tight LSA will really make it hard to get tuned.

 

So with all this being said, what would be the optimum specs for a cam in a 305? From what I'm gathering from yall, it appears that a cam w/ . . . 210/215 and 112*LSA appears to be the most radical one can go without heavy tuning?? But I'm just now diving into cam specs and what not, so I could just be a complete idiot.

Of course this would be for those WP S/R Torquer heads he was referring to. . .

 

i *personaly* would stay in the 208-212 intake 215-220 exaust range. and go for an agressive lobe shape with high lift .490 or greater with 1.5. i would go for a 114 LSA if you don't want 'as much' tuning, if you want more tuning to do go for 112.

again that is just my preferance, some people will probably tell you diffrently.

 

I have a 357 people not a 305. well, i think i have decided to go with the heads and 1.6 rockers. keep my LT1 cam, for now. are my heads 64cc or 67cc. cuz the worlds come in 67 or 64.