Does anyone have any idea what the torque and HP ratings would be on a 91 caddy? I do believe it's a 350 ci but I'm not sure what model this one is out of. Any idea's, guesses or speculation would be greatly appreciated.

I dont think Cadillac ever used a 350...

But let me do some checking...

91 DeVille 4.9l 200hp 275tq FWD
91 Eldorado 4.9l 200hp 275tq FWD
91 Fleetwood 4.9l 200hp 275tq FWD
91 Seville 4.9l 200hp 275tq FWD
91 Allante 4.5l 200hp 270tq FWD

91 Brougham 5.0l 170hp 255tq RWD
Apparently the Brougham cam with a 5.7l option but I couldnt find any stats on it. Im guessing it was a standard GM 350, so a 91 GM 350 made in the area of 230hp 300tq.

So yeah, you plnanning on using a Cadillac engine tranny in a FWD application? Or the last of the RWD Cadillacs power plant?

Those 4.9 caddy engines are pretty nice if you build them right, but I don't think they would fit very easily into a Monte Carlo...

I was thinking of using it for my Monte but I think I might just get an older 350 cause I would need to convert the Caddy to carb anyway. I just saw a good deal on the engine and tranny ($400 Cdn) so i figured i should check it out. Cbass, why would I have trouble fitting the Caddy into my monte?

Well, the engine is a FWD transverse engine, and will mount differently from a RWD engine. Also, why would you want to convert a good EFI to carbs? It'll just worsen your gas mileage and won't give any good power benefits.

If you want an engine swap, your best bet would be a LT1 from an early 90s Corvette, or 93+ Camaro or Firebird. There is as much power potential as you want, but the engine is lighter because of the aluminum heads/intake etc. It'll start every morning no troubles at 15 below, and get good gas mileage on the highway...

I would convert it to carb because I don't know how to install all the electronics involved with EFI. A friend of mine who used to be a mechanic said that it wouldn't be worth the trouble to install the EFI for that engine. How much would an LT1 cost? I was looking around for one but couldn't find much for a decent price.

I would convert it to carb because I don't know how to install all the electronics involved with EFI. A friend of mine who used to be a mechanic said that it wouldn't be worth the trouble to install the EFI for that engine. I listened to him cause when it comes to anything made in the last 20 years I'm a bit of a dumbass :D. How much would an LT1 cost? I was looking around for one but couldn't find much for a decent price.

Well, converting to EFI might not be worth it if you live in Florida and get cheap gas, but in Ontario, you probably want the reliability and easy starting of fuel injection in the winter...

If you went to a junkyard, and found a TPI setup off of an '80s Camaro or Firebird would probably be $200 or so, maybe $400 if you took the nice aluminum heads too.

A complete LT1 with tranny varies depending on year, mileage etc... the most cost effective way to get one would be to go to a junkyard with a pickup and pull an engine out of a wrecked car. If you pull your own engine, maybe $1500 with the tranny. It all depends on the engine, and what the wreckers want for it.

As for what's involved in converting your existing 350 to EFI, it depends on your cylinder heads. Ask Redneck about this, he know's more about the SBC than I do... If the TPI intake manifold will fit your cylinder heads, you can just bolt it on.

The important thing is to take everything related to the fuel injection from the car, including intake manifold, throttle body, fuel rails with injectors, ECM(the computer), fuel pump(s), and any wiring that's connected to the engine. It's all just a matter of bolting those parts on to your Monte Carlo...

This is what you should be looking for, this one is a 305, but the manifolds may swap anyways, you probably just need an adapter...

http://ebay3.ipixmedia.com/abc/M28/_EBAY_1e1b32ca0c766189aa498d44c7b194de/i-2_B_L.JPG

This is a custom setup, using a Firebird manifold with a Corvette ECM and a good chip...

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1872715017

Here's a complete setup from a Corvette... These are a little pricey on Ebay, but you can get them pretty cheap from wreckers. Corvette stuff is always more expensive, but the F body parts are pretty cheap.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=1872580992

ooo pretty engine...

The lovely part of SBC is that they're interchangable with parts. Such as intake manifolds and heads... headers. Even most internal peices. What makes them different is the bore and stroke.

Ok lets talk motors.

Cbass said "As for what's involved in converting your existing 350 to EFI, it depends on your cylinder heads. Ask Redneck about this, he know's more about the SBC than I do... If the TPI intake manifold will fit your cylinder heads, you can just bolt it on."

Now what is neat is the TPI intakes can usually be swapped out with a normal carb intake with little difficulty. Only thing you need to be sure of is the year the block was cast. Through the years bolt patterns and few other minor changes have occured in SBC's. Just run the casting number stamped on the block, determine what year it is then order the go-fast goodies for that particular year. Fairly straight forward procedure.

Obviously if you pull a 350 out of a 87 Camaro with TPI you can most likely guess its an original block from 87.

Im out of ideas at the moment... keep asking questions though. If I cant help you im sure somebody will chime in who can.

I'm not sure, but I think after '87, they used a different bolt pattern for the intake. I've read lot's of stuff that says it'll work before 87, but not after and vice versa... :confused:

A complete setup like that corvette one should bolt on though. In a worst case scenario, you might have to buy an engine, in which case a LT1 from a junkyard won't run you too much.

Or you can buy a brand-new LS1 straight from GM for $5,383.











What?

Am I the only one who think thats a good deal?
http://www.sdpc2000.com/images/products/8731502_6556166.jpg

For that sort of money I can get a Lingenfelter LT1! Still a good deal though :D

I'd spend the extra cash for a LT5 though... DOHC, 4 valves per cylinder, aluminum block, 405hp :D I was just looking at the Lingenfelter page, and he wants $33,000 to build a LT5 now :eek:

http://www.lingenfelter.com/pac610hplt5.asp

Some pics to make your mouth water...

http://www.zr1.net/gifs/lt5.JPGhttp://steeltownvette.com/images/zr-1.jpg
http://www.ranchochevy.com/images/zr1_sideview_384x288.jpg



Come on Redneck, you know you want this as wallpaper :D

http://steeltownvette.com/images/lt5.jpg

Lotuus designed, Mercury Marine built, John Lingenfelter tuned... the
LT-5 is one of the three ultimate Corvette engines.

The other two being the 1969 ZL-1 Aluminum 427 (500hp factory rated... YEAH RIGHT) and the 1964 Traco-built 377ci small block in the Grand Sport Vettes (conservative estimate of 485hp at the rear wheels, plus those quad crossram 2bbl Webers look so bitchin).

LT-1's are cheap and plentiful. If you can't afford one out of a junked Vette, they can be found in junked Camaros, Firebirds, and Caprices. Even better, the V-8 engine mounts are readily available. Either modify a set of 305ci mounts, or go to your local short track and hang out in the Street Stock pits. Those guys can point you in the direction of a good set of mounts for a 350, and they know what they're talking about. (dragging 400hp out of a 350, no biggie, except when you're doing it through a single two-barrel)

Actually, you can get 400-600 CFM 2 bbl carbs, and those are enough for 400hp... At that point though, the 2 bbl manifold would probably be the biggest restriction.

It doesn't have to be an LT1, they're just the nicest. Even a throttle body injected V8 will be an improvement over your stock 350, as far as driveability and reliability are concerned.

I'd pick up that Caddy V8 just to have it on hand... it's worth a fair bit more than $400, and would make a nice swap into a Cavalier or a Fiero...