Domestic or rather GM engine codes
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Domestic or rather GM engine codes
Just thought Id answer Number_2's question.
GM is pretty much the only one that uses engine code, or sorts anyway. They arent designation like Nissan or Honda uses.
here you go
As covered in Spectacles Thread
GM is pretty much the only one that uses engine code, or sorts anyway. They arent designation like Nissan or Honda uses.
here you go
its really more like a generation or style of the block. Just like honda has d series/b series/ h series/f series.......
Yes they are gernally bigger than the small block counterparts. A new 7L LS7 block is still smaller than the older BBC like the 454 etc....
There is the typcical SBC chevy, which comes in 3 generations. The standard one that was around since the muscle car days, that was GEN I, GEN II is the LT1/4, GEN III is the LSX motors. For the most part, parts dont mix between the 3 of them, they are sorta like in design, but the LSX is really different, its more akin to a SBF/BBC in port layout.
BBC share nothing alike with the SBC cept its a motor. BBC also came in generations, I think they are upto the Mark VIII generation. I couldnt tell you the different between the years though
Chevy
SBC GEN I 283/302/305/327/350/400
BBC 396/427/454/502
Theres the typical SBF, 289/302/351w alot of parts interchange with in the series. Theres the FE(BBF) series which is the 390/429/460 motors. Then theres the 302c/351c which were the Boss motors with 4 bolt main caps in the 3 center mains. Then there was the 351/400m motor for quite a # of years.
Dont ask me about dodge, their shit still confuses me at times.
But to break it down, dont go buy liters, just go by physical size
Yes they are gernally bigger than the small block counterparts. A new 7L LS7 block is still smaller than the older BBC like the 454 etc....
There is the typcical SBC chevy, which comes in 3 generations. The standard one that was around since the muscle car days, that was GEN I, GEN II is the LT1/4, GEN III is the LSX motors. For the most part, parts dont mix between the 3 of them, they are sorta like in design, but the LSX is really different, its more akin to a SBF/BBC in port layout.
BBC share nothing alike with the SBC cept its a motor. BBC also came in generations, I think they are upto the Mark VIII generation. I couldnt tell you the different between the years though
Chevy
SBC GEN I 283/302/305/327/350/400
BBC 396/427/454/502
Theres the typical SBF, 289/302/351w alot of parts interchange with in the series. Theres the FE(BBF) series which is the 390/429/460 motors. Then theres the 302c/351c which were the Boss motors with 4 bolt main caps in the 3 center mains. Then there was the 351/400m motor for quite a # of years.
Dont ask me about dodge, their shit still confuses me at times.
But to break it down, dont go buy liters, just go by physical size
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571ll 7h3|23 15 |\|0 d351g|\|4710|\| f0|2 d1ff3|23|\|c35 1|\| 7h3 m070|25. F0|2 3><4mpl3, 7h3 B18c1 15 4 1.8 l173|2 170hp 10.2:1 C|2 m070|2 \^/17h 4 du4l pl3|\|um 1|\|74k3 4|\|d h1gh p0|27 h34d. H0\^/3v3|2, 175 c0u51|\|, 7h3 B18c5, 15 4 1.8 l173|2 195hp, 10.6:1 C|2, 51|\|gl3 pl3|\|um 1|\|74k3 4|\|d l0\^/3|2 p0|27 h34d.
C0|2|23c7 m3 1f 1'm \^/|20|\|g h3|23, bu7 GM h45 d1ff3|23|\|7 v3|2510|\|5 0f 175 L51 m070|25, \^/h3|23 c0mp|235510|\| v4|2135, 01l 5ump5 4|23 d1ff3|23|\|7, 37c.
7h3 H0|\|d4 c0d35 4|23 u53ful 1|\| 7h47 |235p3c7.
C0|2|23c7 m3 1f 1'm \^/|20|\|g h3|23, bu7 GM h45 d1ff3|23|\|7 v3|2510|\|5 0f 175 L51 m070|25, \^/h3|23 c0mp|235510|\| v4|2135, 01l 5ump5 4|23 d1ff3|23|\|7, 37c.
7h3 H0|\|d4 c0d35 4|23 u53ful 1|\| 7h47 |235p3c7.
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Originally Posted by John
still there is no designation for differences in the motors. For example, the B18c1 is a 1.8 liter 170hp 10.2:1 CR motor with a dual plenum intake and high port head. However, its cousin, the B18c5, is a 1.8 liter 195hp, 10.6:1 CR, single plenum intake and lower port head.
Correct me if I'm wrong here, but GM has different versions of its LS1 motors, where compression varies, oil sumps are different, etc.
The Honda codes are useful in that respect.
Correct me if I'm wrong here, but GM has different versions of its LS1 motors, where compression varies, oil sumps are different, etc.
The Honda codes are useful in that respect.
There was some slight difference I recal in the early Ls1 that came with the vette vs the ones that came with the fbodies. But from what I read later on, there identical.
The only thing that really changed on the car Ls1 was a few minor revisions and them adding the LS6 intake somewhere in 01 to all Ls1 motors.
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Originally Posted by John
still there is no designation for differences in the motors.
the LS prefix indicates GEN III
for the most part, it's not as concrete as other manufacturers
though there was a GEN I "LS6" in the chevelle ss
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. Cool find 
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LT1's are slow!
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Originally Posted by Mars_302
I guess I should say engine codes for GMs are also based on their RPO or build codes. There was a Gen I LT1 as well as the Gen LT1
And with the BB's it was an LS-6 as opposed to the Gen. III LS6
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1996 Corvette CE coupe LT1/A4
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1998 Camaro
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Richard
1996 Corvette CE coupe LT1/A4
Mostly stock
1998 Camaro
Z28 badges and dual exhaust tips
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Most detailed engine information, Ford or Chevy, is in the VIN or option sticker. You can also decode the casting # on the engine to gain some details about it, or the casting # on the heads. An LS1 is just a designation for displacement,bore, and stroke. Both the LT1 and LS1 are ~350 cubes, but they're totally different geometry.
http://www.mortec.com/borstrok.htm
www.mortec.com has a TON of shit on GM casting #'s too. Decoding an old 60's Chevy is a big pain in the dick. Trust me, I know.
http://www.mortec.com/borstrok.htm
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 = 3.780" 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 = 3.740" x 3.48" (Gen.I, 5.7" rod)
307 = 3.875" x 3.25" (Gen.I, 5.7" rod)
325 = 3.780" x 3.622" ('99-later, Gen.III, "LM7" 5.3 Liter Vortec, 6.098" rod)
327 = 4.000" x 3.25" (Gen.I, 5.7" rod)
346 = 3.900" 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)
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
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 = 3.780" 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 = 3.740" x 3.48" (Gen.I, 5.7" rod)
307 = 3.875" x 3.25" (Gen.I, 5.7" rod)
325 = 3.780" x 3.622" ('99-later, Gen.III, "LM7" 5.3 Liter Vortec, 6.098" rod)
327 = 4.000" x 3.25" (Gen.I, 5.7" rod)
346 = 3.900" 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)
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
