ltblue79

So I picked my heads which are going to be Dart 127121. So now I need to choose a cam. With the heads the motor will come out to 9.0:1 comp and I have long tube headers and true 2.5 duals with edelbrock intake. So my thoughts were getting this cam.

http://www.compperformancegroupstore...Category_Code=

I was told with my setup I should see 17-18 inches of vacuum. Any thoughts? Is there something better?

Also should I reuse stock rockers or buy new ones? What would you recommend?

MelWff

have you tried CC camshaft selector software? It's a free download from their site.

Tim H

Do you see its a 4 wheel drive cam?

ltblue79

ya thats how i picked what i did. this cam seemed to have the best power for what i have while keeping it lower in the rpms. ie peak torque at 3500 and hp at 5k.

was just wondering if anyone else has something close to my setup and what cam they are using

63mako

That cam should be fine especially if you hasve a stock type L48 bottom end, an automatic and a high gear differential. If your blockis undecked you can bump your compression up a little with a felpro 1094 head gasket it will help everything. The cam won't know it is not in a 4x4. I have a Marine cam in my car and it don't know it is not in a boat. I would buy a set of 1.52 rockers for it and check your pushrod geometery with a pushrod checker. You will more than likely need different pushrods.

ltblue79

lol if the cam figures it out it might be upset with you lol. it is a stock bottom end with a 200-4R tranny and 3.55 gears. ill look into the gasket and the rockers. It says it needs a .100+ rods but i planned on checking to be safe.

BLOCKMAN

9.0 compression does not give you much to work with.

63mako

With stock L48 bottom end, 1094 gasket and 64 CC heads I have come up with right at 9.4 to 1 when I figured it in previous threads. With your gearing you could actually go with the next size bigger cam and, as always, I would go with a hydraulic roller. Check out the Howards cams hydraulic rollers at summit. The kits are under $500 and are billet cores with the retro roller lifters.

ltblue79

I would love to go with a roller cam but Im going to be getting married this year and Im lucky that I can take as much money out of the wedding funds to put in the vette fund as I have. lol

What cam would you recomend then? It wont be a track car one bit. Just a weekend cruser. The heads have a max valve lift of .510" so .480" is getting close while still giving me 17-18" of vacuum. but if theres something better show me the way. Can never have too much power

drwet

I think the cam you have chosen is a good choice for the setup you have. Yes, a roller cam would be better, but they're a lot more money. Worth it though if you can afford it. I wouldn't go with any more duration than the cam you have chosen since you only have 9.4 compression. More duration requires more compression.

63mako

Ran the numbers. With the Felpro 1094 gasket your @ 9.49 to 1 compression and with the cam you selected your DCR is 7.92 to 1. Your good to go. If you want to increase HP it will raise your operating range a little.
http://www.compcams.com/Company/CC/c...?csid=121&sb=2
This one is figured with 1.6 rockers. Going to 1.52 rockers drops your lift to .494 and .490 and will lower your operating range to about 1800 to 5800. It will also drop the effective duration a little. More Duration and lift + more HP if your compression will handle it. Your DCR with this cam is 7.75 to 1. I think your gearing will handle this and no problem with vacumn or running regular gas.
There are quite a few dynoed 9.5 350 combinations here.
http://www.ryanscarpage.50megs.com/combos1.html
Many are using Comp cams. Some just change the camshaft from 262 to 268 or bigger. You can see the differences in just a cam change due to better cylinder filling. At a certain point without a compression increase a bigger cam get diminishing returns.

iokepakai

Installed a Crower 00320 solid cam in my L48.Thought about retro roller lifters but the cost and images of the link bar failing didn't go over to well.Decided to go with EDM lifters for positive lubrication to the cam lobes.[IMG][/IMG]
There are also hyd camsaver lifters that help provide more oil to the cam lobes.These have a groove on the lifter body.
http://www.crower.com/media/pdf/2008b/140-141.pdf
Next motor will be a roller block for sure....

ltblue79

Thanks so much!! Im going to stick with the cam i chose for now. Maybe next year itll get a stroker bottom end with some more compression and a bigger cam.

The next thing is to pick out rockers. 1.52s are kinda pricey compared to 1.5s. Is there going to be much difference between them? And do I get roller tips or full rollers?

63mako

Not a lot of performance difference. If you plan on an upgrade build later I would go with the full roller 1.52 Pro magnums from comp and plan on using them on your other engine but if budget is the big issue a set of long slot summit brand roller tipped will work fine for a long time. With the lift you have go to Summits site and search for long slot rockers and you will find a selection to choose from if you don't want full roller.
http://www.summitracing.com/parts/SUM-141506/
http://www.summitracing.com/parts/CCA-1601-16/

Little Mouse

Do you have a pulling sensation in your steering wheel everytime you pass by a lake.

ltblue79

Thanks a ton! You have been so helpful! Im going to use the summit ones for now.