350/5.7 generation 1/2/3 link and info???

[mudhog]

can anyone post a link with a description/timeline/what they came in of all the 350/5.7s

the reason i ask is all this gen I/gen II/gen III...LS/LT/L3... and then it gets into car 350s truck 350s and corvette 350s i get so confused trying to figure it all out so any info would be of great appreciation.

[devinwalterbmx]

I understand some of it but I to tend to get confused with a lot of it so a link and more information would be nice..if no one else gets one up befor I get back on then I'll look around and see if i can't dig something up

[devinwalterbmx]

http://www.nastyz28.com/sbcmenu.php

http://en.m.wikipedia.org/wiki/Chevr...l-block_engine

http://en.m.wikipedia.org/wiki/GM_LS_engine

http://www.novak-adapt.com/knowledge...l_block_v8.htm

http://www.novak-adapt.com/knowledge...ion_III_v8.htm

I just pasted all the links I went to but the 2 novak links are the best. And you never know what to trust on Wikipedia but I went ahead and left them up there.
Gen 1- small block
Gen 2-LT 93-97 i think
Gen 3-LS 97-prensent

[RPMbagged97]

are you trying to figure out what all is interchangeable? There are still some discrepancies in there that break up each generation, not all heads work on every block from that generation. I am also pretty sure the LS3/L92 engines started the gen 4 sbc, where they got rid of the cathedral port heads and went back to a large rectangular port.

There is also a company that makes a gen 1 style block that accepts the gen 3 cylinder heads.

[mudhog]

http://www.nastyz28.com/sbcmenu.php

http://en.m.wikipedia.org/wiki/Chevr...l-block_engine

http://en.m.wikipedia.org/wiki/GM_LS_engine

http://www.novak-adapt.com/knowledge...l_block_v8.htm

http://www.novak-adapt.com/knowledge...ion_III_v8.htm

I just pasted all the links I went to but the 2 novak links are the best. And you never know what to trust on Wikipedia but I went ahead and left them up there.
Gen 1- small block
Gen 2-LT 93-97 i think
Gen 3-LS 97-prensent

wow thanks all i could find was the wiki pages which realy didnt make it any easyer to under stand.

[Doober]

In a nutshell...
Gen 1: all 350s up until TBI started around '86-'87 they were all the same outside cam/exhaust/head offerings, etc... Everything interchanged. The TBI engines brought on the 72 deg. inside intake bolts to make access easier, many just elongate the two center holes on the intakes... not ideal but it works. TPI came around '85-'86 I believe. The one piece rms block also brought the cast-in bosses for factory roller options. One piece rms blocks also have a small counterweight on the flexplate/flywheel which doesn't interchange with earlier blocks/cranks.

Vortecs are technically Gen 1 meaning the heads bolt to the block fine but you need a specific intake because the bt pattern is different, and the port configurarion is slightly different. They are the best flowing, highest performing production heads GM cast, alongside the LT1 heads, which are Gen 2.

Gen 2: this engine started in the Corvette in '92 with the LT1, which was then used in the F-Bodies in '93. Last year was '97 in the F-Bodies. The L99 is the "baby" version of the LT1... Same engine design but only 262ci. This and the LT1 were used in the Caprices. The valvetrain parts, starter, rotating assy., flywheel and oil pan are about the only parts that interchange with the Gen 1 engines. The intake/heads/ignition are Gen 2 specific. Some have made the Gen 2 intakes work on Gen 1 engines but I feel it's more work than it's worth. There are aftermarket short runner intakes available for Gen 1 engines.

Gen 3: LS1/LS6 is the only actual 5.7 displacement engine for this family, but that's pretty much where the similarities end. Completely new engine, DIS ignition, and more technologically advanced than the older 350s. I'm not too familiar with the LS family, but it's becoming more & more the "SBC swap" of today.