Abaddon_fallen1

How's about a later model or earlier model LT5 (found on ZR-1 'Vettes) with a supercharger and maybe a 150 shot? Ideas, opinions, prices?
Good or bad in a 1990 Firebird Formula 350?




Yeah, I know, the trans and rear end will have to be swapped.

cd90rs

I hope you have very deep pockets.

305RSlc

That would be too much fun to be realistic.....unless you are a CEO of a huge business.....LT5 would run about $10-$12 grand(new crate) but dunno about a used one though...I would love to see someone get ahold of a LT5 and stick it in a third gen....anyone willing to donate a LT5 and I will do it! But that swap would probably cost you around $12 grand if you did everything yourself.(that's based on my knowledge of the price of the LT5) But never seen it done so don't have a definite price... The world would be a better place if a third gen were running around with a 500+ horespower LT5 with the ability to spray some go-fast juice on top of that....:hail: :hail: :hail: I doubt anything on the street would be able to touch it....but that is just my thoughts.
Lc

fly89gta

iTrader: (1)

keep dreaming....

Air_Adam

That would be so cool.... and people (yes, there are people like this) will look in and say "Hey! He's got a Hemi in here!!"

Parrydise7

iTrader: (1)

Do a search. This has been discussed previously. Since Chevrolet is now pulling as much (or more) horsepower out of a pushrod engine (isn't the LS6 rated at 405?) the only reason for such a swap would be the coolness factor. (AFAIK, you will also need to swap in the ZF transmission, which would also represent a bit of work). BTW, there were some repairs that a dealer could not perform on that engine. The Corvettes had to be shipped back to Detroit. (No, I don't know what kind of repair it was.) Now, as long as the car is under warranty, that wouldn't be too bad. But can you imagine how much that would cost once the warranty expired?

Guest

The new LS6 is putting down even more than that.

I still think the LT5 is just too costly to consider as an option. Only way I'd do it is if I came across one cheap, and thats highly unlikely to happen.

badandy247

There is a company out there that makes overhead cam heads for a standard 350, that would make for and interesting modification in itself, I saw a test of them a few years back in either car craft or hot rod (i have so many subscriptions i can't keep em straight) they seemed to perform better than most of the heads that they were tested against too

85_ZED28

it would probably look something like this:

PETE

iTrader: (1)

Nice photoshop! If it was a little darker in color(engine) it would fool some. As far as I know the problems presented have been covered. GM has done this swap already needing to relocate the firewall yes the firewall ladies and gentlemen. If anyone is interested in that idea good luck. There's a reason the LT5 came in a Vette.

Couldn't copy the pic. It's white and purple built by Jon Moss a while back. Try to search for it......

Abaddon_fallen1

Yeah, the LS6 is putting out a bit more, but then think about it, If there's a coling problem you'll **** up the LS6 (since it's aluminum) more than an iron block. I think an LS6 block might be more costly than an iron block.


P.S. Yeah the iron weighs more, but it's a small price to pay for some additional strength.

Cronic3rd

Unless you are either dumb or squeezing alot of extra air in there the sheer weight savings of an alum. block offsets and extra strength.

305RSlc

Uh, the LT5 isn't iron. It's an aluminum casting just as the LS6 is. So the same would hold true with the cooling problem on a LT5, though that would probably be more costly to fix. And yes the LS6 block is costly. It is $1200 just for the bare block, new casting of course. Whereas the good old iron Gen I blocks can be had for under $100 and up from there.

Here's a site with the all the LT5 specs.

http://www.zr1.net/ZR1_specs.html


Lc

Abaddon_fallen1

There is a flaw in your theory, according to the specs, only the crankcase and cylinder lining is made out of alluminum, not the entire block. Just pointing that out.

papas87

Definite coolness factor. But why not just go with the Ram Jet 502. Juice it and there'd be few street machines that could compete, even one with an LT5, and for less money. But I would still opt for the LT5 if cost was no concern.

Jason G

bohn333

I believe that Lingenfelter has put a LT5 in a 3rd gen, the biggest problem is that these engines have 10 quart oil pans, so fabrication of the K-member is a challange. The engines were actually built and produced by Mercury Marine then shipped to GM for installation in the Corvette.

PETE

iTrader: (1)

A motor plate should cure all k member issues however the engine is longer than the one it replaces moving the accesories towards the radiator making clearance a pain.

Guest

Keep reading, the whole thing is besides some main bearing inserts.

FSTFBDY

iTrader: (33)

That maybe photoshop but this isnt..

FSTFBDY

iTrader: (33)

1more.

john moss project car

Amrish

here is another if you'd like, same car at different angle...

D M N

if you want DOHC why not get a cadillac Northstar engine and bore and stroke it up to maybe a 305 i have seen them pretty cheap and they are all aluminum

fly89gta

iTrader: (1)

and they also leak like Niagra Falls

I don't understand the facination with that motor, yeah..sure it's powerful from the factory, but that's it. Can't really upgrade it. I could build 2 SBC's that would run circles around that motor for the price of just one of them.

I guess it's all about the "wow factor"

D M N

if you build it yourself with better seals and gaskets it wont leak

I agree with you too i mean i would like to build a SBC instead os this because of all does sensors

bes217

Chevrolet did it before as one of their show cars. I have a pic of it somewhere and will try to get it scanned in as soon as I can.

Abaddon_fallen1

Yeesh, I'll just try to cram a 455ci Pointac mill in the 'Bird. It'll be a hybrid, but then it won't. I'm sure you Pontiac guys know what I'm talking about.

D M N

Nissan is coming out with a Dual Overhead Cam 5.6L V8 and unlike the LT1 it has a aluminum block

badandy247

this post confuses me it's comparing apples and oranges

D M N

did you even read the board

badandy247

i did but i don't think you did, nobody is talking about Lt1's this discussion is about the Lt5 engine and the only others mentioned are the Ls1 Ls6 and the Northstar

all are aluminum blocks and two are DOHC engines

the LT1 is a different beast

D M N

No the Lt6 is an iron block and yea i did read the board

badandy247

it's a LT5 and it's aluminum the LT4 and the Lt1 are iron

D M N

no the Lt6 is an iron block

badandy247

there is no lt6

it's an lt5

and it's aluminum

proof you are wrong in this link http://www.zr1.net/ZR1_specs.html#G

I am an ase certified mechanic i think i probably know a little more about this than you do

D M N

HAHAH ok dude call down if you are a ase certified you dont have to prove anything to a 16 year old. I'm working on my ASE and i dont think there is anything on there about lt5 with aluminum blocks.

badandy247

you're correct there isn't anything about the LT5 on the test but when you work on cars day in and day out a few exotics come your way at times

most of my experience with the LT5 is from helping a friend out and changing his starter for him an that was an experience in it's self (GM charges $2000 to change a LT5 starter not including parts) it's actually located underneath the intake manifold in the oil galley it took a whole weekend to accomplish

I'm glad to hear you're working on your ASE it really opens doors for you once you're certifed in all the major areas i got my first certification at 17 and i'm now 20 and it really helped me get work it's proof that you know what the hell you're doing more than actual training

D M N

yea i want to work as a mechanic instead of working at krogers to pay for my college

The starter was under the intake?? that weird