[cad92brougham]

my question deals with the 4.3 L v8 that came in some 90's civillian caprices. RPO L99. From what i understand, they are Gen II smallblocks based on the LT1 with a 3" stroke, 3.74" bore, 5.94" rods, and 305 pistons. 9.9:1 Compression.

I want to know what parts are interchangeable with LT1 parts (or aftermarket LT1 parts), Heads, cam, intake, and crankshaft.

I found an intake for the lt1, my main concern is that it won't bolt up, ports wont match up, etc.. also, the intake is for a carb, so im not concerned about fuel injection and smooth idle im just looking for power.

I was told that the heads are not interchangeable because of combustion chambers, if this is true, what can be done to correct this??

Also what can be done to raise the compression of these engines?



Last edited by cad92brougham at Dec 15 2003, 01:30 AM

 

[corndawg]

i dont know about the 265 but im pretty sure that most all sbc parts interchange except cranks pistons and such

 

[cad92brougham]

talkin about the lt1's here, they arent exactly your average smallies

 

[Jeff]

Originally posted by cad92brougham@Dec 14 2003, 07:04 PM
my question deals with the 4.3 L v8 that came in some 90's civillian caprices. RPO L99. From what i understand, they are Gen II smallblocks based on the LT1 with a 3" stroke, 3.74" bore, 5.94" rods, and 305 pistons. 9.9:1 Compression.

I want to know what parts are interchangeable with LT1 parts (or aftermarket LT1 parts), Heads, cam, intake, and crankshaft.

I found an intake for the lt1, my main concern is that it won't bolt up, ports wont match up, etc.. also, the intake is for a carb, so im not concerned about fuel injection and smooth idle im just looking for power.

I was told that the heads are not interchangeable because of combustion chambers, if this is true, what can be done to correct this??

Also what can be done to raise the compression of these engines?

If you're trying to stick a '94-'96 LT1 intake on an earlier "baby" 350, it's not really going to work.

Take the '96 LT1, there really hasn't been any aftermarkert intakes because GM's design works so well.

I would take this to another forum, maybe the LT1 forum or Impalassforum.com...

 

[cad92brougham]

Originally posted by unfunkyufo+Dec 15 2003, 04:22 AM--></span><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (unfunkyufo @ Dec 15 2003, 04:22 AM)</td></tr><tr><td id='QUOTE'><!--QuoteBegin--cad92brougham@Dec 14 2003, 07:04 PM
my question deals with the 4.3 L v8 that came in some 90's civillian caprices. RPO L99. From what i understand, they are Gen II smallblocks based on the LT1 with a 3" stroke, 3.74" bore, 5.94" rods, and 305 pistons. 9.9:1 Compression.

I want to know what parts are interchangeable with LT1 parts (or aftermarket LT1 parts), Heads, cam, intake, and crankshaft.

I found an intake for the lt1, my main concern is that it won't bolt up, ports wont match up, etc.. also, the intake is for a carb, so im not concerned about fuel injection and smooth idle im just looking for power.

I was told that the heads are not interchangeable because of combustion chambers, if this is true, what can be done to correct this??

Also what can be done to raise the compression of these engines?

If you're trying to stick a '94-'96 LT1 intake on an earlier "baby" 350, it's not really going to work.

Take the '96 LT1, there really hasn't been any aftermarkert intakes because GM's design works so well.

I would take this to another forum, maybe the LT1 forum or Impalassforum.com...

[/b][/quote]
i think the 265 ci (L99) came in the 94-96 caprices. i want to swap the intake manifold so that i can put a carburator on it.

The intake manifold i was looking at is made by chevy for the lt1, by lt1 do they mean just the 350 lt1, or other gen II smallblocks??


Here is the description:

SBC Aluminum, Gen 2 design, LT1 for carb. This Gen II design small block (RPO LT1 type) will fit late model Corvette, Camaro/Firebird, and Caprice engines. With the longer runners, it can increase engine torque by 30 lb/ft. without sacrificing top end horsepower. This will allow enthusiasts to take advantage of the advancements of the Gen II engine’s design without installing a computer pre-emission controlled vehicles.
Technical Notes: The bolt pattern on this manifold flange was revised and the holes rotate 27° to match the Gen II cylinder heads. There are no water coolant holes on this manifold, and it will only fit 1991 or later Gen II engines. Casting P/N 24502574.

Last edited by cad92brougham at Dec 16 2003, 05:04 AM

 

[Jeff]

Ok, forget everything I said...I talked to my engine builder today.

Everything is swapable with my LT1 except the pistons, it has small ones, hence the "baby" LT1 name.

It may be easier and wiser to just get a junked LT1 from a yard...or Ebay, people sell them for cheap.

 

[cad92brougham]

Originally posted by unfunkyufo@Dec 16 2003, 05:11 AM
Ok, forget everything I said...I talked to my engine builder today.

Everything is swapable with my LT1 except the pistons, it has small ones, hence the "baby" LT1 name.

It may be easier and wiser to just get a junked LT1 from a yard...or Ebay, people sell them for cheap.

cool thats what i wanted to hear, thanks