my engine is a stock 350 from a 3/4 ton truck. the heads are the stock 441 heads. well i am porting a set of lg4 heads. i have ported the exhaust pretty good and just basically cleaned up the intake and gasket matches them. it has the stock valves but they are pretty new and have been ground and seated and bronze insterts put in the guides. well i want to put these on my 350. i ported the 305 intake manifold for the heads and i have a 600 cfm carb and headers and i was wondering how well this cam would work. its 1000-3200 rpm, 194/204, .398/.420. its only 79.99 at summit. what do you guys think of my setup? any ideas about the power it might put out or if it is even possible with the heads. and also how much of a difference would it be to put bigger valves in it? from what i have read its only for higher rpm's and hp. im not sure what size valves the 350 heads are but possibly i could swap the intake valves on them? thanks alot for any help!

 

i also forgot to ask. are my 305 or 350 valve springs better? will they be able to handle the lift of the cam? thanks

 

That cam is basically a replica of the GM 929 cam. .390"/.410", 194/204 @.050". Junk. It's the cam that was responsible for the magnificent 165 HP 350s of the 70s. I wouldn't pay $1 for one; in fact, if I had a brand new one laying around, I'd throw it away and buy something else. Oh wait.... I already did that.... more than once.

Even the generic 204/214 cam that Summit sells for the same price would be a vast improvement over that dung heap; I think their part # for it is the 1102. The same cam is available from Melling, Speed Pro, PC, and every generic cam label like Wolverine, Blue Racer, etc. If you want to pay too much for it, you can even buy it from Edelbrock as the "Performer Plus".

Both the 305 and 350 valve springs are garbage. They should have started out life about the same. If you're not willing to buy new ones, pick the ones that have more pressure left; maybe if you're lucky, one set of them will actually operate the valves back near the seats sometimes.

It would be a good idea to upgrade the intakes to the stock 350 size, 1.94".

The rest of what you have should do OK for a budget street build; might even run OK, with a half-decent cam.

 

ok. i will get new aftermarket springs. i am just trying to figure out what a good setup might be to make a nice healthy car that is still a daily driver. the only thing that is perminent is the heads because i am porting them and they should help me raise my compression pretty well. i can put 350 valves in them. thats no problem but should i use intake and exhaust from the 350? what cam would u reccomend? i deffinately want a nice healthy one that will be good. the reason i was lookin at the summit cam was because i can use it with my stock torque converter and it was right in the rpm range that i drive it. any input would be greatly appreciated. thanks alot

 

That summit cam may be compatable with the factory stall, but if you compare its advertised duration to its .050" duration you can see it takes forever for the tappet to get to .050" let alone the higher lifts. So keep that in mind. The longer it takes for the cam to reach .050" duration, the less amount of time the valve is in the more useful lift ranges. to get the ramp rate, subtract the .050" from the advertised duration. the cam you were looking at has a 252/262 advertised. Then subtract the 194/204 .050" duration and you can see the ramp rates. For a small comparison, the smallest comp cam (is a high energy, 50 state CARB approved) for the 262-400 small block is 240/248 advertised and 192/200 @ .050". You can get a sense as to the ramp rates. The Xtreme Energy series has even more aggressive ramp rates. That probably is another reason the RPM range is so small. Remember, theres always more to a cam than just the .050" duration and the lift. Its how they work together. Also, another thing, that summit grind looks like it was meant to be compatable with stock hardware (running under .450" valve lift). Since you have the heads apart, why not just run the springs required for a larger cam and get the most out of your engine?

Are you running the factory stall? Have you bought any other of the valvetrain parts yet? For the money, i find the comp K-kits hard to beat. They come with all the components pretty much all matched up. You still are running the factory heads so a dual pattern grind is what you would be best with. Cams like the 262h and the 268h are what i would go with. Of course, Crane and Lunati also offer good cams. Isky is out there too, but they are mainly race grinds. They are also expensive.

As for the heads, have the spring pockets been enlarged at all? Thats another thing you may want to keep in mind. 1.94/1.6 valves are about as big as i would go in a 305 head. Bigger than that and intake velocity starts to degrade.

 

Well I would definetely go with better valve springs and 1.94 and 1.5 valves. with the mild port job you described and those valves you should have a decent flowing head. Maybe a little better than L98's. I would also unshroud the combustion chambers to about 60cc's depend on what pistons you have(probably the dished 8:2:1 compression pistons they used in those weak *** trucks.) Youll probably come out with about 9:8:1 compression. Then I would go with the comp cams XE262 cam. Youll need at least 3.42 gears in your rear to run this cam but it will be worth it. If you combine that with a good manifold( possibly a performer RPM later down the road, I know how it feels to be on a budget) headers and exhaust. You could easily make 300 hp. Good Luck.

 

i think the stall is stock. i had my transmission rebuilt and im nto sure what he put in it but when i hold the brake and give it gas it wont break lose till 1500 rpm's and i think thats stock? the heads will be pretty much stock. i ported them alot on the exhaust side and am goin to basically clean them up on the intake because it helps to mix up the fuel if its a little rough right? and i will put my 350 intake valves in them. do u know about how much it would cost me to have the heads ground for those valves? i havent bought any of the valve train components yet. but i am on a budget. i dont really want to spend more than like 150 - 180 bucks and i still need to buy some gaskets. thanks alot

as for gear, i was looking into some 3.73 gears. would these work alright? i wont be able to afford them for a little while but i have been looking around for some. and i have been looking for an edelbrock performer intake but it will be a while before i can get that. how much of an improvement will my setup now be over stock? thanks

 

Keep your heads just upgrade the springs. The comp 268 ,454,454 at .050 cam will work well as go for a Edelbrock Performer RPM intake and your carb will be fine.
A provin combo I've used in the past and had great successs with is.
441 heads with stock valves but upgraded springs,
Edelbrock Performer RPM intake(air gap even better)
600cfm Edelbrock carb,
Flattop pistons are a big +
373 gears,headers and a good catback.
That will give you a good powerband and for a street engine with enough ba**s that you'll be happy with and when you can afford it go with a stall around 1800-2100.
Good Luck

 

If you havent bought ANYTHING for the heads, something like <A HREF="http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=2476991701&category=33617&sspagename=WDVW">This setup</A> would be not half bad. Talk to them, they could probably give you 1.94/1.6 valves. Maybe not the best of valves, but its a good budget package.

Ive got a 355 in the making that is running Vortec heads and the Isky 235-D springs and i like them a lot. IM running the Lunati bracket master II cam (a very mild one):

* Advertised duration: 292 intake/292 exhaust
* Duration at .050 in. cam lift: 230 intake/230 exhaust
* Gross valve lift: .480 in. intake/.480 in. exhaust
* Lobe separation: 109 degrees
* RPM range: 2,000 to 6,000
* Decent idle

Its doing pretty good with a 2400 stall.

 

i have been looking at the comp 268 cam and it looks like a good one and would work good for my setup. im not sure what i want to do though. i can either get bigger springs and redo my 441 350 heads, or use my 305 heads wich i have been porting pretty well and about half way done with one head. and i can either use stock valves or the 350 intakes and stiffer springs. what would flow best? my 305 heads are gunna be de shrouded in the combustion chambers and i am gasket matchin teh exhaust side to my header gaskets and then blending the bowls and taking out all rough edges and making it completely smoothe and i have taken out alot of material from them. now all i need to do is just totally smoothe them out wiht some sand paper. so what would be better? thanks

 

With all the time and work you have in the 305 heads,Use Them.
If it was a choice between the 305 & 441's both stock then the 441 would be a better choice but you've got to much time in the 305 heads to not use them and this is on a budget so all your work is worth more.

 

what kind of idle does the comp cams 268 have? will i be able to notice it

 

It has a noticable lope at idel but not as much as a race cam and you'll have no vaccume issues. About the best you can use and still be a daily driver.

 

It is not the biggest you can use and still be a daily driver. There are SEVERAL members here who run the 274h or 276hr and are daily drivers. It is about the most you can run on a STOCK CONVERTER, yes. But most for a daily driver, i dont think so.

On top of that, one persons view of a daily driver may differ from another.

 

i know there are bigger cams but i have a stock converter and gears. so i should stay with that. adn my deffinition of a daily driver is something that u can drive all the time, is reliable but still have some grunt to it

 

My deffanition too.