Questions About Chevy 350

[Guest C4RN4GE]

Hi there,

 

I've been an active guest during, I would say, a month. I was reading and searching through HybridZ, Wikipedia and internet about Z32 V8 swap but I didn't found many information about it. As I read many thread much of my questions have been answered but there is still few that stay without answers.

 

I can see on Wikipedia many Hp/Torque differences between Chevy small-block 350. The questions are: What the differences between the engines for such a big hp range? I mean there's almost 100hp between the L46 and the L48. I was wondering, will every engine would give the same result after being rebuilt and moded with performance parts or there is few specifics engine that are better to work on?

 

 

P.S. Im sorry if this question have already been answered but I looked for but i didn't found anything that really help me.

 

Thanks

[grumpyvette]

the basic SBC engine derives its potential mostly from

cylinder head flow rates

displacement

compression ratio

and

cam timing

 

a 383 displacement is about the most cost effective, horsepower per dollar combo you can build, simply because it maximizes the 350 blocks displacement for the money spent and a 383 will usually produce about 40hp/40ft lbs more than a 350 built to similar specs.

the differance in performance in most sbc engines is due mostly to changes in those parts/factors listed above

 

BUT DO YOURSELF A HUGE FAVOR AND BUY THESE FOUR BOOKS FIRST BEFORE YOU SPEND A DIME ON PARTS

 

http://www.amazon.com/Build-Performance-Blocks-Budget-Design/dp/1884089348/ref=sr_1_5?ie=UTF8&s=books&qid=1212078611&sr=8-5

 

http://www.amazon.com/John-Lingenfelter-Modifying-Chevy-Engines/dp/155788238X/ref=pd_sim_b_title_2

 

 

http://www.amazon.com/Smokey-Yunicks-Power-Secrets-Yunick/dp/0931472067/ref=pd_bbs_sr_2?ie=UTF8&s=books&qid=1212078836&sr=8-2

 

http://www.themotorbookstore.com/resmchstvi.html

 

heres a bit of info

 

your generally going to get between about 1.0-1.35 HP per cubic inch from a SBC with a good combo and in good tune without getting into the more exotic and expensive parts.

so getting a bit over 515 hp from a 383 is fairly close to the N/A limit with basically STOCK type components using pump gas and running realistic rpm levels where the engines going to last a few years. that doesn,t mean you can,t get more, but youll generally work a good deal harder and spend noticably more on components to do so.

naturally if youve got the cash flow for 18 degree heads and a valve train that likes 8000 rpm you can do noticably better , but a mix of aftermarket parts and basically stock components puts you near that level

look thru these

 

http://www.ryanscarpage.50megs.com/combos1.html

 

http://www.chevymania.com/dyno/

 

http://grandsportregistry.com/dyno.htm

 

http://www.chevytalk.org/fusionbb/showtopic.php?tid/131229/

 

don,t feel good building your own or just want component?

your almost always way ahead to buy a complete ballanced rotating assembly from a single manufacturer, that includes all the moving parts and bearings

 

http://www.scatcrankshafts.com/

 

http://www.ohiocrank.com/rotatepage1.html

 

http://www.adperformance.com/

 

http://www.lewisracingengines.com/

[Guest C4RN4GE]

Ok! Sorry for the noobish question but you said sbc engine, I know sbc meen small block chevy, but isn't 383 a motor that has been in Dodge and Chrysler car? I am looking a 383 from Chevrolet and I don't find anythings.

[grumpyvette]

a 383 is simply an extremely comon performance engine combo which is a basic 350 engine with a .030 over bore and a stroker 3.75" crank assembly rather than the stock 3.48" stroke of the 350 in stock form,...again READ THRU THE LINKS

 

ESPECIALLY THIS THREAD

http://www.chevytalk.org/fusionbb/showtopic.php?tid/131229/

 

looking thru the links I posted and this chart might help

 

 

 

CHEVY SMALLBLOCK V-8 BORE AND STROKE

 

 

262 = 3.671" x 3.10" (Gen. I, 5.7" rod)

265 = 3.750" x 3.00" ('55-'57 Gen.I, 5.7" rod)

265 = 3.750" x 3.00" ('94-'96 Gen.II, 4.3 liter V-8 "L99", 5.94" rod)

267 = 3.500" x 3.48" (Gen.I, 5.7" rod)

283 = 3.875" x 3.00" (Gen.I, 5.7" rod)

293 = 3.779" x 3.27" ('99-later, Gen.III, "LR4" 4.8 Liter Vortec, 6.278" rod)

302 = 4.000" x 3.00" (Gen.I, 5.7" rod)

305 = 3.736" x 3.48" (Gen.I, 5.7" rod)

307 = 3.875" x 3.25" (Gen.I, 5.7" rod)

325 = 3.779" x 3.622" ('99-later, Gen.III, "LM7", "LS4 front wheel drive V-8" 5.3 Liter Vortec, 6.098" rod)

327 = 4.000" x 3.25" (Gen.I, 5.7" rod)

345 = 3.893" x 3.622" ('97-later, Gen.III, "LS1", 6.098" rod)

350 = 4.000" x 3.48" (Gen.I, 5.7" rod)

350 = 4.000" x 3.48" ('96-'01, Gen. I, Vortec, 5.7" rod)

350 = 3.900" x 3.66" ('89-'95, "LT5", in "ZR1" Corvette 32-valve DOHC, 5.74" rod)

364 = 4.000" x 3.622" ('99-later, Gen.III, "LS2", "LQ4" 6.0 Liter Vortec, 6.098" rod)

376 = 4.065" x 3.622" (2007-later, Gen. IV, "L92", Cadillac Escalade, GMC Yukon)

383 = 4.000" x 3.80" ('00, "HT 383", Gen.I truck crate motor, 5.7" rod)

400 = 4.125" x 3.75" (Gen.I, 5.565" rod)

427 = 4.125" x 4.00" (2006 Gen.IV, LS7 SBC, titanium rods)

 

Two common, non-factory smallblock combinations:

 

377 = 4.155" x 3.48" (5.7" or 6.00" rod)

400 block and a 350 crank with "spacer" main bearings

383 = 4.030" x 3.75" (5.565" or 5.7" or 6.0" rod)

350 block and a 400 crank, main bearing crank journals

cut to 350 size

[Guest C4RN4GE]

Sorry I didn't took the time to read links before replying, I didn't had the time. Im going to have a week of reading lol Thanks!

[280zwitha383]

 

1 out of 3 ain't bad.......