Im getting to the point where im going to have to put my v-8 in to keep my car, but i only have enough money to get a 700r4 with a converter, currently i have a rebuilt 350 with the notso liked 882 heads on it, with a performer intake and Holly 4150 750 carb, hooker 2055s. Future plans include AFR 180 or 190 heads.

Best cam to work with the 882 heads that would work well enough with the AFR heads, but i would probly change cams to work perfectly with the AFRs. And what stall should i get my converter at? i get the options of 1650, or 1800-2000. BTW 3.73 posi out back, car will be street driven with some spirited runs down the track.

 

Get something with very little duation, and as much lift as you can get (and stay in the heads bounds). Those 882's are ruining your compression, and a long duration cam will only bleed it off and make it worse. Basically, dont overdo yourself. Honestly, the optimum cam would probably leave you with a stock converter, but no sense in doing that.

 

I say the 1800-2000 one. 1650 is stock and anything is better than stock.

You might benefit from looking for a Corvette converter, I believe they stalled at 2200 and can be found cheaply. Of course a higher stall than that would probably be even better, but if this is all you have to work with, then that's that.

 

I used a 252 comp cam with those heads and flattops. It felt pretty torquey.
You could go a bit bigger than that, but something in that range is good.
Do you have the factory dished pistons of flattops?
If they're flattops with .015 deck and .040 thick gasket, you'll have around 9:1 CR. That works pretty well with those RV type cams.
Actually if you plan on taking the cam out when you get a better set of heads, a good one would be the 266 (IIRC) Crane Energizer (210*@.050).
They're less than $100 with lifters and they work pretty well

 

I wouldnt count on compression ratio in that range even. Stock deck height is .025 (roughly). If it was rebuilt with the typical rebuilder pistons, that puts the pistons another .020 in the hole. That leaves a deck height of .045. Then add the compressed head gasket height. It really all depends on if the block has been decked, zero decked, or if it has been left alone.

 

I do have a deck hight of .045, with the stockish Flat top pistions. I beleive with the gasket ill be using ill have a comp ratio of 8.6:1 (wow thats low )

 

The piston is .045" below the deck at TDC?
Or is that the compression clearance incl the gasket?
Use this calculator, and figure 4cc for the valve reliefs if you have the cast 4VR flattops.
http://kb-silvolite.com/calc.php?action=comp
If your CR is lower than 9:1 then get one of the smaller cams.
I've built engines like that for trucks, and they were a lot more powerful than a goodwrench truck motor. With an small cam, headers, and a Performer intake with a 4bbl.
They would easily pull a trailer up a pretty good grade in 4th and have power to spare.

 

More than likely, if the block has never been decked, but it has been rebuilt, then the you will have a .045 deck height, plus the gasket. That does make for a low compression beast. Just make sure not to use too much duration on the cam, you will be ok.

 

Im using a worked over set of those heads with a 214/224 cam. Its a little down on low end, but pulls very hard from 3500-5500. My 3.73's help a lot.

 

Sorry about the delay, time to get back to work on desinging my combo, anyways, i have the 882 heads cleaned up(carbon removed, starting to polish exhaust side, soon matching intake with gaskets, Performer RPM), and still with pressed studs with the stock 1.94 and 1.5 valves. The motor is not rebuilt, not sure where thats going to leave the deck hight, ive heard .025 for the 010 blocks, i do have the stock bottom end with about 35k miles on it, i got to track down its hystory, still in a 70' C-10, thats rusted and has no body now, but has motor and tranny still on it, but covered by an over hang.

I will be useing a 700R4, it looks like it will come with a 2200 stall converter. On top i will probly have a Performer 600-650, with a holly 750 sitting on the bench. Gas milage would be somewhat nice, i havent swaped a cam in a v-8 and taken it out to see what MPG was like, just done swaps before for power, and never really consider the MPG, this will be my daily driver once i get it back up and going.

I have been looking at the Comp 268 cam, on DeskTopDyno 2000 it seems to make almost as much power with those heads as the 284 cam, but a noticeable amount more than the smaller 270 cams (20-25 over the range), would the 268 cam be too much duration for these heads, and the stall of the converter?

 

I considered that cam when i did my buildup, but i used a summit cam since i was broke. For what its worth desktop dyno shows my engines making 323 gross hp at 5000rpm. Which seems to be pretty accurate. That cam showed about a 5% increase across the board.

If you have the compression then that cam is not over kill, or if you plan on future head swap. Other wise use the 262.

When grinding the heads work on the pocket under the valve, there is A LOT! of material that can be removed.

 

The 268 is too much cam.

Use the 262 at the absolute max. It's probably still too much.

Those generic cheap cams like the most basic Summit one work fairly well in an application like that; no flow, therefore no RPM capability, and no compression. Since the heads will defeat any attempt to obtain useful power output at any RPM above 4500 or so, it is counterproductive to over-cam them. You want what ends up being a really dinky cam, for the least poor results.

To avoid exceeding the limits that the crappy heads force on you, ideally you'd want to stay below 210° or so of intake duration; you should look for a much bigger exhaust lobe than intake (the exhaust side being where those heads are the crappiest); and tight lobe separation (110° or less).

 

I have pretty much that exact same combo in my S10

'74 014 casting two bolt block, .030" over with Speed Pro cast flat tops, measured .045" in the hole, Fel-Pro head gaskets of unknown thickness, and 882 heads. I figure at MOST I have 8.5/1 CR.

I'm running a 268XE cam, which was advised my COMP. Too much for this setup. It has decent low end torque only because it's in a 3200 lb truck with a 2200 stall, 700R4 and 3.73's.

It dynoed a screamin 201 RWHP at 5200 and 248 Ft/lbs at somewhere around 3200. THe Cam is .477/.480 lift and 224/230 druation at .050". Desktop Dyno said 322 hp and 363 tq at the flywheel, but looking at my actual RWHP I have more like 240 flywheel

The cam is adverstised for 1600-5800, but the 882 heads run out of breath before that point is reached.

I would definitely use a smaller cam and find some better flowing castings if I had to do it again. I had just gotten divorced at the time and it was all I could afford to put together.