A bud has one sitting in his barn and thought of getting and using it in another project for my son.

Don't know the mileage, so I'd have to go through it (probably just a re-ring)
Most likely in a long bed mini-truck bolted to a 2004r from a Monte SS.
Can i get around 250hp?

Can I use the 5.7's intake and other parts to give a little more performance? Like cam from a camaro?

Now that I think about it.. It might just be a TH350 that I already have built, and the rear is only a 3.55 or so..

It's a toss up.. I have several engines in various stages of completeness. From a '62 283 w/forged pistons to a '80 406 with trick flow heads that should be around 430hp (like heck he's getting that one!..)
I had a camaro back in college that had a 2bbl 283, powerglide, 273 rear and got a whopping 31mpg driving 6hrs back and forth.

BUT it was a DOG and couldn't get out of it's own way.. BUT HEY, it was a '67 rally sport convertible.. (should've never sold it)

E

 

The caprice lt1's are almost the same as the f body version, but they have iron heads, and were rated 10 hp less. Lots of people like the iron heads because they flow a little better and they are more durable, but you could pretty much get the same numbers from an iron head lt1 from a caprice as an aluminum head f body lt1.

 

Oh and if you wanted the f body heads to save some weight, they can be had for 200-300 a set

 

LT-1 is an early 70s engine.
LT1 is a 90s engine.
The Caprice LT1 is 260hp stock on 87 octane, the Vette and f-body used a cam with less lowend torque but no highend gain for it when both are done up with comparable boltons, and 91 octane tuning.

Rockers/springs,good exhaust reprogramming the pcm and free flowing intake TRACT and 300rwhp is doable.

Blindly bolting on Camaro or Vette parts because they came from a Camaro or Vette would be a poor idea.

Now the base engine in the 94-96 Caprice was an L99 which is a 4.3l version of the LT1 rated at 200hp.

What are you talking about when you ask about a "5.7l intake"?
The LT1 is a 5.7l and if this is an L99 it still has the same intake anyway.

 

I thought that the caddy/caprice 4.3 motor was rated at 180hp.?
OR is there a difference between the caddy and the caprice motor? (maybe the caddy was a 5.7 and the caprice was a 4.3..?)

I'm not going blidly into it. That's why I'm asking.
The Intake/injectors swap idea was to see if there would be any benefit to swapping a Camaro 5.7/350 intake, thinking that the runners/ports would be a bit bigger than the little 4.3L ones. (little as in 265ci) And maybe using the camaro cam in the 4.3 since I'd already have it. And with a light truck, 3.7:1 rear, little higher stall and tune, should wake it up.

I have two sets of alloy heads. One ported, bare and one just fresh off a low mileage motor. (see below)

SO as to NOT cornfuse anyone:
I have 2- LT1 motors.
1-iron headed 94 caddy with harness, ecu and trans that was with it.
1-aluminum headed 93 camaro 60K motor that was disassembled to a shortblock and purchased that way. and a truck 4L60e that I'd hve to get a harness/ecu for.

Thinkin of getting a buddys 4.3L LT1 for the little truck swap. (don't have it yet)
The 4.3 in a light truck should get in the upper 20's or more on the highway I would imaging.
Otherwise, I do also have a .060 over 283 that I wanted to put a set of ported Vortec heads on with a Comp ex268 cam and a rochester, but was thinkin more of mileage now..
(and that dang HEI would be a hindrance.)

Sorry if I seem to be jumpin around, just still in the planning stages..

Thanks
E

 

4.3 was NOT an LT1- it was RPO L99- the "baby" LT1, 200 HP IIRC- the base engine- confuses the heck out of the parts monkeys when you tell them you have a 4.3 that is 8 cylinders- they often confuse it with the V-6

The lt1 in the 94-96 Caprice and Buick, Olds Cadillac was 260 HP/330 torque, and used the updated opti with a slightly different drive. Good, durable motor, with plenty of easy mods to get more power- the next bump up in those years was the LT4 which was optional on some of the 'vettes and SLP camaros, with different heads that also required a taller intake. Lots of cost for a little increase- almost better going aftermarket if you are going to spend that amount of money.

 

Dealerships get confused by this.
There were two different 4.3s the V6 and the L99 V8 both used "W" VIN code and over the years both were used in the Caprice BUT by the 91 model year there were no more V6 Caprices.
For the 94-96 model years the Roadmaster(wagon or sedan), Fleetwood, Caprice wagon, and Impala got the LT1 standard. The L99 4.3L V8 was the base engine in the Caprice SEDAN ONLY be it cop or civilian. It was definitely rated at 200hp and from memory 245tq.

With the original LRR tires on my Caprice I got pretty consistent mid 20s even with a trunkload of gear and the AC on. LRR tires really make a difference.

The LT1 was never offered in an Olds the Olds wagon was I believe 91-92 with only about 10K made, the b-bodies didn't get the LT1 till 94.

Far as the LT4 using a "taller intake" that is incorrect, the heads had much larger ports and the intake manifold for the LT4 was cast with extra material above the port at the head mounting flange to seal to the larger/taller port in the head. Internally though it was the same as the late model LT1 intakes with the SMALL trapezoidal ports, the earlier LT1 intakes actually have larger more rectangular ports.

Actually talking about intakes brings up another point, the 93 motors had an intake without a crossover trough for the fuel rail, some slight advantage to that at elevated HP levels but the fuel rail is a hinderance to elevated HP levels. If you can TIG weld up the rails from the 94 Caddy intake for some 90degree fitting out the top and a small piece of braid to connect them and use them on the 93 intake. If not you might just use the 94 intake and rails, the 94 motor should also have 24lbs injectors where the 93 has I believe 22lbs.

 

........
Dang it.. Looks like I'll have to spend hours reading again.
Get's me kinda dizzy (maybe more dizzy) than I actually am.

I think that 240ftlbs in that little truck would be just fine with a 3.6or7 rear and an overdirve.
I already did the Toyota front hub conversion and Yota 8" rear too. And it is a 1 (ONE) TON long bed from the factory believe it or not!
Here's a pic.

Waddya think? Stacks out the bed or ported out before the rear tires with stainless rings?

The opti on the front of the 4.3 has a vent port, so that's good. Well, if it actually WORKS would be better.
Looks like I'll be selling some roller blocks and other parts to buy this 4.3 from him.

Dwayne, Will there be a problem using a different models, stripped down harness in the little truck?
I know that I'll have to run a FI fuel pump and such. It's just in another thread someone stated that it should be kept "model specific" before stripping down.. TRUE OR FALSE?

I might be PM'ing you later as I get a pile of parts together if you don't mind..
I promise I wont drive you nuts

Thanks again. Errol

 

I haven't done any retrofits so I wont be able to help much with that stuff, and automotive wiring and I don't get along well though I need to get better.

Far as "model specific" I don't see it really mattering beyond the 93 harness being for a EPROM pcm and no MAF. Honestly I would get another 94-95 harness so both vehicles use the same tuning software/hardware.

ALL the b-bodies 94-96 got the vented opti the unvented was not put on them atall. If you endup using the unvented setup I would put an MSD cap and rotor on which adds a vent.

With gears up around 3.70 and those tiny tires(look small) I think the L99 will be fine. It is OK for a Caprice with a base curb weight of 4060 with 2.93s and 27.5-28" tires. I think stock the L99 Caprice ran high 16s or right around 17.0 quarter mile time. Certainly not anything we would call quick but not slow for such a big car and little engine. It has the same cam as the 5.7l LT1 so it does feel a little "peaky" stomp on it from a stock and the 1400stall doesn't let it climb atall than once you get moving it comes alive nicely.