NUKEM

iTrader: (3)

In July I bought an abused '87 formula t-5 with a crappy junk 350 (no seriously,) and threw a rod (at 2k rpms) in September. I've been saving and now I finally bought a new block to get it back on the road. (It gets cold riding a freestyle bike to work at 7:00am lol)

Engine - Rebuilt 350 long block 3970010 4 bolt main
Pistons - Stock dished pistons
Heads - Stock #882 heads 76cc (on block). Or Iron Eagle Platinum 200cc 64cc
Intake - Original 2101 Performer (will upgrade with sufficient funds)
Carb - (Non CC) Q-Jet
Exhaust - Hedman long tubes and either custom 2 3/4" duals, 3 1/2 or 4" single pipe to a hooker muffler for exhaust. Whatever is better I'll build.
Stock rear 3:23 gears.
Weight - 3400lbs? (hopefully less)


I know the Dart heads flow way better than the 882's but this is going to be a daily driver with a few trips to the strip, are the Dart heads 200cc intake ports too big for a street 350?

I also need a good reliable cam that is a good match with the heads. I was thinking about the Voodoo 268 (Lun 60103LK) Should I go bigger? Solid lifter? Smaller? A roller is out for this build.

I've been hanging around this board for years (Since '99) soaking up all the good info so I never really had a reason to post a question. Everything was answered in the search. I finally joined when I became a third gen owner this summer. Thanks for helping.

Atilla the Fun

lets start with heads, because that determines everything else.
882s will get you to 5500 rpm, but the 200s will work better at 2400 rpm on up past 6500.
on a 350, 882 heads and a cam that'll run power brakes will net you around 350 crank horsepower by 5500 rpm, at best. Those 200s will be an instant 50-plus horses, all else being equal.
With the 882s, a single 3" exhaust is plenty, even if you add a small nitrous hit.
For the 882s, I'd say a COMP Xtreme X4-254H11, and I'd say your cam would be fine with the 200s.

Sonix

iTrader: (1)

I would throw the 882s in the trash and never look back.

The 200's would work GREAT with that lunati cam. I had that one briefly (lost 4 lobes...), then had an xe268h. Both are great cams, a little tame for me in the long run, but mine isn't a DD.

stock dished pistons will give you just barely enough CR to run the 64cc heads. You'll be burning premium, maybe midgrade, depending on details.

single 3" is fine, any bigger is a BEAR to get up under there. 3" is fine for almost all SBC combinations under these cars, unless it's a really wild build.

then make sure you've got a posi, and go to town!

five7kid

iTrader: (14)

Stock dished pistons and 64cc heads isn't going to require premium. 8.5:1 CR, maybe. With a healthy cam, it'll probably still be a dog down low.

Atilla the Fun

depends on the dish. 64s, with proper piston-to-head, with a set of H423s will be 9.7:1, which means premium with iron heads, even good ones.

NUKEM

iTrader: (3)

Thanks for the replies guys. I appreciate it.

So the IE 200cc + Voodoo 268 would make a good mid range combo but anything lower than 2500RPM would make it dog? I don't mind spinning it up but would a smaller cam (voodoo 262) help out the low-end torque? Or are the heads too big to optimize a smaller cam? Is it compression related?

Compression. The imbalanced 350 (305 crank + 4in bore pistons + scheming seller= time bomb) that threw a rod had #416 heads on it, they are 58-59cc and it ran on 87 octane with no pinging for the 2 months I drove it. I checked http://chevytech.net/ for some info on the heads and block. Since the engine is 70's era with smog 76cc chambers, the compression could be anywhere from 8.2-8.5 according to them. That roughly gives me 12-16cc dish pistons right? So using 64cc heads, I should be at 9.5?

NUKEM

iTrader: (3)

I'm open to any other possible combinations, just don't want to put together a dog. I need as much usable torque as I can get out of this thing.

chaoz28

i agree with the throw away the 882 heads i had em on my old camaro worst heads EVER!

anyway i ran comps xe268h with 210 64cc heads and stock dish pistons befor i could afford flat tops and it ran just fine with a 3.42 rear it ran low 14s at a mile above sea level.

if your looking for ***** off the line though you might wanna be worried about your gears more than the engine. the setup you have will be fine.

Atilla the Fun

I didn't say it'd be a total dog, but with that cam you'd do well to run a higher-stall converter anyway. With good heads and a non-roller cam, plan on running 1.6:1 rockers after you do the initial cam run-in, whichever cam you use. Yes, dropping back to the 262 cam will improve your low-rpm torque, but you really don't need to worry about torque at 2000 rpm if you run a 2400-stall converter, for example. I myself prefer a 2000 stall over a 2400 stall for daily city use.
With either cam, I'd say a 3.73:1 gear would feel strong, and a 3.42:1 wouldn't be a problem.
Piece together what you have listed, then if anything doesn't meet your expectations, start a new thread.