snakehead

iTrader: (1)

Has anybody purchased the Short Block Swap 4.7L for their SC400 ?

Lextreme has a kit for sell $5-6K

Was interested and wanted some more info .

Thanks in advance.

50-75 RWH

maynanator

iTrader: (1)

first things first, forget the whp numbers, your not going to get them by simply swapping the short block. the only thing swapping a short block will do is lower the power band. i.e say the factory motor makes peak power at 5700rpm it will probably move down to 5200rpms. so rather than a hp increas you'll see a torque increase. second $5-6k is buying you a motor built for 1000+ hp. if your planning on turboing or supercharging the motor than its worth it, otherwise you can do the swap with simply a slightly modified 2uz block and some motor mounts. block for $1k and mounts for $300 plus either custom pistons ($1200) or find someone who can modify the 2uz pistons for valve clearance.

maynanator

iTrader: (1)

if you want horsepower you should look into headers, intake, and a tune. if thats not enough you could get some cams or even go the forced induction route.

xspsi6

iTrader: (31)

1uz is a very costly engine to mod but is a capable engine just not in the states

snakehead

iTrader: (1)

I just want to stay away from forced induction all the way around, I enjoy the power on tap of a V8 .

It would be great to have a solid 350 RWP .

I will look it to what Maynantor is saying about the modified 2uz block.

Just need to find more info on this type of build..

Thanks

maynanator

iTrader: (1)

i hate to break it to you but 350whp isn't really possible without forced induction, that is, in a reliable manner. thats about 450 crank horsepower. even race built 1uz's don't make that. also another issue you'll face is the fact that you have a vvti motor: vvti is very very hard to tune. your best bet is to either supercharge it or swap in a jz motor. niether of which will be easy. you could sell your current car and find an older model sc, unless your determined to keep your current car. also you could potentially make 300 whp if you manual swap with headers, intake, and a tune. though you might still need to add cams in. wheel horsepower targets will be infinitely easier to reach with a manual, as that cuts half the drivetrain losses. for example a factory 92 sc400 can gain approx. 30 whp just from a manual swap (180 to 210 whp).

check bullet cars. they have a supercharger for the 2UZ. don't order the 1uz kit as it won't fit the vvt iheads. the 2uz heads are the same as the 1uz vvti heads, so you should be able to make that work. one other thing, the transmission is pretty week in the sc400, you'll either have to rebuild or swap the transmission. if you plan on running more than about 400 crank hp you'll want to change the rods from your engine. a cheap and reliable replacement are early model 1uz rods or if you have the money ttcperformanceparts.com has a set for 750.

snakehead

iTrader: (1)

I have the manual swap kit R154 Trans,

Going to install very soon, kind of scared about opening a can of worms.

I want to stick with the NA V8 set up.

I really appreciate the info.

I enjoy the power it has already so cams ,tune , headers,and intake should bump me up 20-30 hp more if i am lucky..

Turbo is great but there is nothing like reliable V8 power on tap.

SC400-V8

iTrader: (1)

If cams, intake and headers combined will yield 20-30hp then you're in the wrong place. I plan on getting roughly that from just headers ppe.

snakehead

iTrader: (1)

That would be nice to get more, how much would headers cams and a tune bring?

If I could pull more HP than 20-30 than I'm good.

Also where to get ppe headers ? Now a days

maynanator

iTrader: (1)

From what I know about the early model 1uz...
Tune= 20 hp
Intake= 10 hp
Headers (with tune installed previously)= 20-25 hp
Cams ( with everything already installed)= 40 hp.
Estimate a few less hp gain from higher initial efficiency of the vvti version and your looking at approx. 350-370 hp. I am saying this lightly though as I have little knowledge on the effects with the vvti version. Have you purchased a transmission yet? Are just the bell housing adapter? One last thing: original whp= 225 final whp= 300+

Ps. Don't be too wary about superchargers. They are very reliable, I would say more-so than cams and a tune. Btw I never mentioned turbos, those are a lot more likely to go wrong IMO (due to general witchcraft involved in building a turbo kit).

snakehead

iTrader: (1)

Yeah I already have the r154 trans and the complete kit, still need a clutch and swan type shifter,

I want to use this as a drift car so I'm looking for ultra reliable ,

I just don't enjoy the turbos power band, maybe ill look on to a super charger but $$$$$.

snakehead

iTrader: (1)

Also the car is rolling with 214,000 on the clock so I'm taking that into account also.

I would be very happy with 350HP to the wheels with out forced induction.

rcchris7

iTrader: (1)

I gotta agree with mayonator here.. It'll cost 3x as much to make 350rwhp on an n/a motor.. I'm talking serious head work.. pistons to raise compression forged internals.. although you'd have high rpms (I've seen up to 9700 on a 1uz) If you want 350rwhp get your headers, copper head gasket and a vortech v1 or v2 supercharger. A smaller one if you only want 350 but with a v1 or v2 you can always turn the boost up a little when you want more

maynanator

iTrader: (1)

with a simple 5-6 of boost you could easily see 400+ crank horsepower. you could see if the lextreme fish bracket would bolt up... if that works, a member on here has a set up using one of those that was built for, I think, less than $2k. cams, intake, electronics, tune, headers, and exhaust would be easily pass $5k. also you should get an account on lextreme v8 forums.