We have a 77 Camaro that runs 11.50 with a mild 355 on alcohol, powerglide, 8" converter, 4.46 gear, 29.5x10.5 tire. The 355 has flat top pistons and cast iron world products heads. The cam is a mild roller. We want to build another motor that would put the car in the 10.80 range. I'm wondering what the thought is about a well built 355 vs a 383? Something with with high compression, a good set of aluminum heads in the 210 to 220 cc intake range, 650" roller cam and the correct converter. Can we reach out goal? We worry a 406 might make this car to fast, plus then we need a good block. Thanks!

What's this car weigh? Strictly 1/8'?

Car weighs 3450 with driver. It's a back half, four link car. Most of our racing is 1/4 mile.

Stock block, eagle rotating assembly, with JE 13.5:1 pistons, 670 lift cam, Dart 227's untouched, went 9.40's at 2500 lbs, so add the weight and you are looking at 10.10's or 20's? If on gas would be a touch slower, maybe your 10.50 goal, 5500 stall TCI group 4 convertor.

What displacement? Thanks!!

quote:

Originally posted by Slick Vic:
Stock block, eagle rotating assembly, with JE 13.5:1 pistons, 670 lift cam, Dart 227's untouched, went 9.40's at 2500 lbs, so add the weight and you are looking at 10.10's or 20's? If on gas would be a touch slower, maybe your 10.50 goal, 5500 stall TCI group 4 convertor.

Oops sorry thought I put that in there, it was a 383

Perfect! Thanks for the info!

I would not use a factory block, get a little M or motown. I have 3 cracked stock blocks used for a 383 with 6" rods under 600HP. Save the time and $$ go after market.

^^^^^^ Agreed. A Dart SHP would be a wiser starting point imho. What you think you’re saving now will lead to spending 2x or more in the future.

quote:

Originally posted by HR3377:
I would not use a factory block, get a little M or motown. I have 3 cracked stock blocks used for a 383 with 6" rods under 600HP. Save the time and $$ go after market.

We got about 2000 passes on our 1989 block. Finally cracked it somewhere. Will pull it apart in next few weeks to see where, but mainly to check crank (should be fine) and order an SHP block. It is a 10.80 car we slow down to 11.50. Was not filled, nothing special, from my buddies 1989 Vette. Had made a cheap 383 with it 15 years ago.

Thanks for the info. I did not know there was a problem with the 350 truck blocks. I thought that's why the 383 was so popular, because you can use a stock block.

Old stock blocks, OLD! Not the newer hydrualic roller stuff. The good old 010 blocks would work well for you for quite sometime at that power level.

66 Nova 355cid Dart 220 heads ported with super victor to match. Roller cam 650-650,750 carb. Best ET is 9.72 @ 136 @ 2850lbs. It's really nothing special. Driver does't wan't to get license so we slow it down to 10.0's

73 Camaro weighing in at 2760 going 10.40s at 4800 ft. adjusted with a de-tuned 383 work horse . Consistent as any one could ask for , old seasoned GM block ,aluminum heads, 650 lift cam , power glide and alkyl carb. I am unwilling to go faster than 10.0s

My 3400 lb wagon had a 383 until I split the main cap on 2 different stock blocks. Dart II heads, circle track roller cam, Probe Pistons that might have been 12:1. 750 Rupert. Ran 6.78 best, usually ran 6.90ish. Heavy cars are hard on them main caps when you're a throttle ripper

quote:

Originally posted by 369dragster:
66 Nova 355cid Dart 220 heads ported with super victor to match. Roller cam 650-650,750 carb. Best ET is 9.72 @ 136 @ 2850lbs. It's really nothing special. Driver does't wan't to get license so we slow it down to 10.0's

What rear tire size and gear ratio?

355ci, 11:1, Brodix Track 1 heads hand ported to a 1207 and angle milled to 56cc, Edelbrock Super Victor intake, 850 QuickFuel Alky carb, Enderle belt driven pump, PBM roller cam #119832 (.555 lift, 260/270 @ .050, 106 lobe center) 1.6 rockers

PG w/1.80 gearset, 8" FTI 6000 stall

12 bolt w/4.56 gears, 28x10.5 Hoosier slicks, ladder bar, Afco shocks

Runs 6.40-50's in the heat at 3025 lbs.

quote:

I'm wondering what the thought is about a well built 355 vs a 383? Something with with high compression, a good set of aluminum heads in the 210 to 220 cc intake range, 650" roller cam and the correct converter. Can we reach out goal?

I know very little about sbc's, but I pay attention lol . I have a friend with a 355 in a 72 nova, I think it weighs 3150 ish. He had stock Track 1 heads on it with a decent roller on gas and ran low 11's with 5.13's and a 30" tire. Car didn't repeat very well either and was very sensitive to weather changes. He changed the heads to an AFR cnc 195 and picked up 1/2 second and over 5 mph with the head swap alone. He now runs 10.90's at 125 in 90 degree heat and is printing tickets, on gas.

I'm assuming your 77 Camaro weighs more than 3150lbs so I'd probably go right to the 383 with a decent head .

385 cid
4.040" bore
3.750" stroker
6.000" rod
Compression: 13.02 to 1
JE Sportsman Piston 7 cc dome - 1/16, 1/16, 3/16 ring package
Kevko Full Length Kick Out Box Oil Steel Oil Pan

Mellings 10555 Oil Pump
SRH 2.5V Import Fully CNC Ported Castings - 2.055 Intake Valve
MSD Crank Trigger and Distributor
Moroso Ultra 40 Wires
Cometic Head Gaskets
Comp CS288 Solid Roller 260/268 101 ICL/106LSA .704/.672 Gross
Jesel 1.6 / 1.6 Shaft Rockers
Valve Springs: 270 lbs seat and 610 lbs open
Titanium Retainers
SRH Pro Comp Fully Ported Burr Finish Intake Manifold
2" Open Spacer
1000 HP - 4150 Holley Carb
VP113 Fuel
Joe Gibbs BR30 Break In Oil
1 3/4" Header with 30" primary length
Star Vacuum Pump and Mandrel Drive (14 - 15.6 " vacuum)

Best Hp: 655.1 @ 6600 rpm
Best Torque: 550.2 @ 5200 rpm
It's still making 646 at 7500 rpm and the torque cure is flat as Kansas.
Average HP: 614.6
Average Torque: 520.0
Test Range: 5000 to 7500 rpm

2700lbs
1560 DA
1991 Camaro RS
Weight: 2700 lbs with driver (213 lbs)
36" Ladder Bars
Santhuff Double Adjustable Rear Shocks with 125 lb springs
Rear Gear: 4.78
3 1/2" Aluminum DriveShaft
Rear Tire: 275 Hoosier Drag Radial on 15 x 10 Wheel
Powerglide Transmission with 1.80 first gear ratio
8" PTC converter - 5800 Stall speed (drops to 6100'ish on 1-2 shift)
Santhuff Front Struts with coilover kit and 150 lb springs

5.88@117

^^^^^^^^^^
Chad, there is no doubt that you continue to put together some very strong sbc packages as you have listed.
Would you share what block manufacture these were installed into ????