350-383 rebuild

[grumpyvette]

This is a street car that I take to car shows, cruise ins and have started taking to the track a few times a year.
The goal is to have a street car with full interior that runs in the 11s at the track. No reason other than bragging rights and a dream.

I have no shortage of projects. So my logic is, if I'm going to go through all the trouble to tear down the current engine to change the cam why not just start fresh with all new known components and stuff this engine in to something else?
I have a 1 pc rear main hydraulic roller 350 that I am going to tear down and have a stroker motor built out of. Here is the question. The motor is a new crate motor with only 2000 miles on it that was pulled under warranty.

My thought is if it has that low of miles do I pay to have it bored .030 over to make it a 383 or do I have the machine shop check everything and if its good leave it a standard bore, hone it and make it a 377?
Will the cost of standard bore stroker pistons be more than the cost to bore since the .030 over is the norm?

The car is a 73 Camaro, 3500lbs with me in it.

Current engine is a .030 350 with L2256 flat top pistons and a mystery hyd flat tappet cam,
ported and polished 461 heads with reworked D shaped exhaust ports 2.02/1.60 valves.
edelbrock Air gap and a 650 DP holley.

I bought the motor complete from a friend when I put the car together. I have changed the heads and intake in the last couple years.

Turbo 350 with a hughes master kit and 3000 converter. 3.73 10 bolt Rear.

The tires I run on the street are 275/60 15
the tires I run at the track are 255/60 15 drag TAs
last time out the car ran 12.80 at 106

GOOD 6" CONNECTING RODS FOR A 383 SBC
http://m.summitracing.com/parts/sca-26000716



if its going to be re-built with a stroker crank assembly
SCAT has some good rotating assemblies

http://www.scatcrankshafts.com/#4
obviously the compression and cam choice should be compatible with that 3000rpm stall and the car weight

I would NOT bore the block UNLESS the bores need to be straitened as the loss of bore wall rigidity is as important as the minimal increase in displacement
Chevy Small Block 4340 Forged
Competition Rotating Assemblies
4340 Forged Standard Weight Cranks, H-Beam Connecting Rods
with 7/16" Cap Screws, Premium Forged Pistons, Rod Bearings, Main Bearings & Rings

BALANCED INTERNAL, EXTERNAL FLEXPLATE ROTATING ASSEMBLIES INCLUDE FLEXPLATE

350 MAIN 1 PC REAR SEAL
355 4-350-3480-5700L 2-350-5700-2100 3.480" 6.000" PREMIUM 4.030 FLAT 11.1 10.3 9.6 1-41610 1-41610BIE
355 4-350-3480-5700L 2-350-5700-2100 3.480" 5.700" PREMIUM 4.030 FLAT 11.1 10.3 9.6 1-41641 1-41641BIE
355 4-350-3480-5700L 2-350-5700-2100 3.480" 5.700" PREMIUM 4.030 DISH 9.8 8.5 8.0 1-41643 1-41643BIE
383 4-350-3750-5700L 2-350-5700-2100 3.750" 5.700" PREMIUM 4.030 FLAT 11.8 11.0 10.3 1-41710 1-41710BIE
383 4-350-3750-5700L 2-350-5700-2100 3.750" 5.700" PREMIUM 4.030 DISH 10.4 9.8 9.2 1-41760 1-41760BIE
383 4-350-3750-5700L 2-350-5700-2100 3.750" 5.700" PREMIUM 4.030 DOME 14.0 12.4 11.9 1-41810 1-41810BIE
383 4-350-3750-5700L 2-350-6000-2100 3.750" 6.000" PREMIUM 4.030 FLAT 11.8 11.0 10.3 1-41825 1-41825BIE
383 4-350-3750-5700L 2-350-6000-2100 3.750" 6.000" PREMIUM 4.030 DISH 10.4 9.8 9.2 1-41831 1-41831BIE
383 4-350-3750-5700L 2-350-6000-2100 3.750" 6.000" PREMIUM 4.030 DOME 14.0 12.9 12.0 1-41837 1-41837BIE
386 4-350-3800-6000L 2-350-6000-2100-S 3.800" 6.000" PREMIUM 4.030 FLAT 11.6 10.8 10.2 1-41838 1-41838BIE
394 4-350-3875-6000L 2-350-6000-2100-S 3.875" 6.000" PREMIUM 4.030 FLAT 11.2 10.5 9.9 1-41839 1-41839BIE

on the plus side , when your working with the Chevy v8 engines SBC and BBC, if you select the correct two piece or one piece rear seal components, many aftermarket manufacturers of flex plates and flywheels to reduce manufacturing costs , build a neutral balance flywheel or flexplate and simply bolt on or weld on a weight to allow the same basic part to work with both potential combos

Counter Weight Kit General Motors Flywheel (1A/2C/3C/4C)

Fits Externally Balanced Applications

1986-1999 SBC

1970-1990 BBC

1991-1997 BBC

1970-1980 SBC 383/400

http://www.chevrolet.com/performance/crate-engines.html

http://www.hotrod.com/articles/hrdp-0503-chevy-383-engine/

http://www.superchevy.com/how-to/en...-build-a-383-small-block-engine-sledgehammer/

http://www.superchevy.com/how-to/project-cars/sucp-0706-small-block-chevy-stroker-kit/

http://www.chevyhardcore.com/tech-stories/engine/building-the-little-383-small-block-that-could/

http://www.hotrod.com/articles/ccrp-0808-383-stroker-small-block-chevy/

 

[Grumpy]

keeping everything else the same,when upgrading from a very similar 350 to a 383, the increase in displacement generally results in about a 45 hp/50 ft lb improvement and a peak power point in the rpm band dropping about 400rpm, your STOCK CHEVY heads will be a restriction.
yes youll notice the difference.
youll be amazed at the info in links
http://www.airflowresearch.com/articles/SBC/biggerbetter/big.php (just hit cancel the article pops up)

http://www.wallaceracing.com/Calculators.htm

http://www.northernautoparts.com/part/ek-ek1097alb

http://garage.grumpysperformance.com/index.php?threads/tips-on-building-a-383-sbc-stroker.428/

http://garage.grumpysperformance.com/index.php?threads/stroker-tips-by-len-emanuelson.1249/

http://www.hotrod.com/how-to/engine/ccrp-0808-383-stroker-small-block-chevy/

http://garage.grumpysperformance.com/index.php?threads/waldes-78-sa.10941/#post-48269

http://garage.grumpysperformance.com/index.php?threads/bits-of-383-info.38/

http://garage.grumpysperformance.com/index.php?threads/more-port-flow-related-info.322/

http://garage.grumpysperformance.co...ding-related-links-and-info.10255/#post-55578

http://garage.grumpysperformance.co...mbers-or-a-good-street-combo-your-after.5078/

 

[Grumpy]

the question ALWAYS comes up early in every engine build, as to the correct CAM to select, and while thats very understandable, youll need to remember that the cam, is basically the brains of the engine, it can tell the other components a great deal about the POTENTIAL intended rpm range and air flow rates, but those components MUST be carefully chosen to MATCH that potential for the engine combo to work correctly, even a single restrictive component can have disastrous results, to the combos true potential.
without knowing the vast majority of the other components being used in an engine, its compression,exhaust restriction,drive train gearing and a bout a dozen other factors your very unlikely to select the correct cam for the application, simply because your basically guessing, more than likely partly based on what seemed to work in a buddies similar car.
in most cases I see it never occurs to most guys that the buddies car they are basing their choices on from the result the buddies got is based on a combo, that on average probably is running at 80%-85% of its true potential, AND ONLY RARELY & OCCASIONALLY MIGHT GET TO 90%., I don,t know a single serious racer that has not been forced to either learn the math, or hire someone
its simply a case of your either going to let someone experienced do the required calculation's based on the facts , or you rely on some guy at a cam manufacturers tech desk or sales team to point you in the best direction, and its been my experience after nearly 50 years of dealing with those guys that the results vary WILDLY, as the experience and skill those guys have is also extremely varied.
(remember the cam manufacturers can,t afford to put a highly paid and experienced engineer sitting around answering phones when they can get some near minimum wage guy trained to ask questions on a flow chart for 20% or less of the cost of that engineer.

http://garage.grumpysperformance.com/index.php?threads/semi-fool-proof-cam-sellection.82/

http://garage.grumpysperformance.co...e-required-octane-for-compression-ratio.2718/

http://garage.grumpysperformance.co...lsa-effects-your-compression-torque-dcr.1070/

http://garage.grumpysperformance.co...mbers-or-a-good-street-combo-your-after.5078/

http://garage.grumpysperformance.co...ing-parts-and-a-logical-plan.7722/#post-51341

http://garage.grumpysperformance.co...-the-charts-calculators-and-basic-math.10705/

http://garage.grumpysperformance.co...lding-a-350-or-upgrading-too-a-383-sbc.11408/

http://garage.grumpysperformance.co...ty-thats-key-in-building-a-good-engine.11682/

http://garage.grumpysperformance.co...the-links-you-posted-grumpy.12020/#post-57525

you should find this series of articles where they take a basic 350 and build it in stages useful


http://www.corvettefaq.com/c3/goodwrench/GM Goodwrench 350 test part 1.htm

http://www.corvettefaq.com/c3/goodwrench/gm3502.htm

http://www.corvettefaq.com/c3/goodwrench/gm3503.htm

http://www.corvettefaq.com/c3/goodwrench/gm3504.htm

http://www.corvettefaq.com/c3/goodwrench/gm3505.htm

http://www.corvettefaq.com/c3/goodwrench/gm3506.htm

http://www.corvettefaq.com/c3/goodwrench/gm3507.htm

http://www.corvettefaq.com/c3/goodwrench/gm3508.htm