roberto123

if money was not a problem, what is the biggest GM LS engine that could be swaped into a 1993 sc400?

engine LS1-LS7

also if money is not a problem what is the strongest v8 engine that could be fit into a sc400

SpecialK47

IIRC, the LSx series of motors, LS1, LS6, LS7, etc. are all externally pretty much the same size. I've seen a thread on here for a LS1 powered SC, so you should be able to get a LS7 into one.

Why not just dump all that money into the 1UZ. You have a V8 at hand already, just do a sweet build on it, a twin turbo or supercharger, etc.

INTIMAZY

iTrader: (5)

Any LSx has the same external dimensions. Therefore, the largest motor you can fit is probably a sleeved 454ci. Don't ask about price.


edit: Not sleeved, I meant iron block.

stevechumo

iTrader: (5)

There you go. Turbo 1UZ

kponti

You see the rwhp you got there? approx 400rwhp with a built everything.
Take a $500 LS1, add heads/cam/intake and you will pull about 420-460rwhp with some nice lope. Add a lot less weight (170-200lbs less with those turbos)

Maybe that is the reason the OP went that route??

imDementeD

iTrader: (7)

if money isnt a problem....then you can put whatever motor you want in your SC
/thread

roberto123

now the part im having trouble understanding with these engines is how can a ls7 engine fit in an sc400? isnt the sc400 a 4.0 liter engine and the ls7 a 7.0?

also is the ls9 engine possible in an sc400? or is that engine too big for the lexus

some people may say this is a waste of money or time but in my eyes it isnt
i want to build the first sc400 with the ls7 or preferably ls9 if possible

kponti

Yes the Ls7 is a 7 liter and the Ls9 is a 6.3 liter. However the Ls9 is bigger and heavier than the Ls7 thanks to the supercharger attached to it.
The LS9 is closer in size and weight to the 4.0 liter in the sc400 (the 1UZ being wider and the LS9 being taller). Weight wise, they are pretty damn close
Both the 1uz and the LS9 are bigger and heavier than the LS7

Different technology in the LS engines vs the UZ engines

SpecialK47

Because while the 1UZ is a 4.0 and the LS7 a 7.0, their external dimensions are similar.

roberto123

ok so if i get the ls9 since your saying it should fit in the sc400, will i have to get a custom hood since its taller? and if so will it still be street legal

SpecialK47

The LS9 is a bit larger due to the supercharger. You would need a custom hood at least. But yes, it'd be street legal as long as it was hooked up to a proper exhaust to pass smog/emissions if your state does those.

roberto123

ok thanks for ur help i think imma go with an LS7 engine, thanks alot for every really appreciate it

poorsupra

iTrader: (11)

please, please, please let me know where you can get a LS1 for this price? a LM7 5.3 is what you probably mean, which is an iron block truck motor. def not an alum block LS1, same family yesss, but which would negate the weight savings you spoke of. been a member of LS1 tech for a long time and never seen an actual ls1 go for that price.


to the OP, if money is no object, buy which ever motor you want, do some research on which member of the LS series of motors is best for you, and still considering money isnt an factor still, you can pay someone to make it fit. for an ls7/trans and install all said and done id be surprised if it could be done <10K. but if this is what you want by all means go for it! great motors!

millertime

cost vs hp. Go with a 6.0 either LS2 or LS6 or LQ4

LQ your lookin at around $2000 with tranny

LS2 about $3000

LS6 about $4000

I am making around 500 hp with a 100 shot in my 6.0 lq4

INTIMAZY

iTrader: (5)

I wouldn't even bother including the LS6. They're very similar to the LS2 and are really not worth the higher cost IMO.

LS3's have nice heads but the cost is still up there.