ZeRoSe7en

Hey there guys, im looking for a project car. I already know most about this platform as i used to have a boosted 2jz- naT 99 Sc300. Im thinking of droping a LSx boosted or built for 600-650 hp. Kind of a luxary weekend drag racer and street car. My question is wich Sc is a better platform to start with (300) or (400), wich one has the most usable parts and make the swap easier. Any advice if anybody has done it?

Dream36

The 300 with M/T would make the swap easier with say the t56. However it doesn't really matter. Get the 400 so the v8 rumble stays sleeperish

mecheng10

most people who do the lsx swap use it for drifting.
no waiting for the turbo to spool and always have the torque there. and you can get parts at a local parts store relatively easily.

if its a weekend cruiser, why not just go na-t again?

why do you want a lsx swap?

ZeRoSe7en

[QUOTE=mecheng10;8545176]most people who do the lsx swap use it for drifting.
no waiting for the turbo to spool and always have the torque there. and you can get parts at a local parts store relatively easily.

if its a weekend cruiser, why not just go na-t again?

The reason is I've had a few turbo cars over the years and have grown tired of how complicated and fidgety they can get. I'm might still consider a 1jz/2jz swap, but the price is going to be the same as dropping a ls1, plus I want the wow factor and want to be able to make the pavement*treamble underneath a mean V8. Not a fan of the Toyota V8 and its poor aftermarket support, so that won't be an option to keep. Plus if I ever get tired of the Sc I can part it up and keep the LsX for future project.

mecheng10

a boosted lsx wont be cheap. not a lot of head bolts and mains...
they do however respond to bolt ons well (headers, intake, etc).
if you get an ls1 or something, the most youll get is 350ish to the wheels. then you have to blow it which at that point youre looking at a complete engine build.

but if you are doing the swap, I guess the easiest thing to swap it in would be the 300.
you can save 200 dollars and not have to buy a pedal assembly (assuming you are going with the t56)
but if you aren't going with a manual then it doesn't really matter which one you get.
get the one with the least rust!

http://www.houston240sx.com/showthread.php?t=50758
that's a guys project who did what you are thinking bout doing

NYKnick101

neither the SC400 or 300 provide any benefits since your going to be doing a full engine and tranny swap. Ive heard the tranny on the 300 is easier to mount but the engine mounts are almost identical on the 400. If not, at least with very little modification. I haven't seen any recent tech they have in it but most people take it to a welding shop to get theirs done in no time at all.

There are tons of info on this but if I was you, I would scout LS1tech.com since the guys over there do tons of swaps on SC, 240sx, miata, i even seen 1 guy do it in a g35

Dream36

I disagree with the 350whp with the ls1, a mild cammed "02" with the obvious bolt ons can hit that quite easily. I mean my "00" I had in my rx7 was rated at almost 350 with just headers (albeit no ac or ps). The reason I said 300 was the shifter surround and pedal assemble, that's if you care about original interior. You would definetly need to swap out a master anyway. Also keep in mind the open dif will not be good enough. I've seen all motor ls1's (yes the 5.7L) hit 500 but we are talking stroked and cammed etc.

You can get a low mileage pullout with t56 for under $5k and add another $2k for nickel and dimes.

Personally I would just boost the 1uz, yes aftermarket sucks but anyone can swap an ls1 these days. And figure in all the costs it would be about the same but you'd get the spool sound AND the v8 rumble

ZeRoSe7en

All valid points guys, keep them coming.My plan is to keep full interior, as oem looking as posibble, minus clutch pedal, double din, steering wheel, and custom made gauges on the dash, im not using the burnt out oem one. It will be a slow build so im only going to get it running at first with few mods like custom header, exhaust and intake (duh). Then im thinking i just might do a mild build, maybee even on a mild shot of juice

mecheng10

im talking whp not crank hp... theres a big difference
from factory ls1 only makes 250ish at the wheels. not even joking.
better to do the gte swap since you have more options for more power (TTC,FMIC, gte can get you 400ish to the wheels fairly easily)

I would try to find an ls7 motor.
those are monsters. but you are looking at 7k for one

ZeRoSe7en

Ouch, for 7k I could possibly have a 600 hp 1JZ, ill keep researching but if the 250 hp to the wheels stock swap is true, I might ax the idea

NYKnick101

also look into LTx and LQx motor swaps, they are almost identical to LSx engines just Iron block instead of aluminum block. Iron blocks are heavier though. You can pull them out of any chevy/cadillac truck for less than 1500 bucks and do a LSx Head swap. Thats probably where you can get the power and save the money. Don't be fooled when people say LSx Swap in 240sx, SCXXX or something like that because i guarantee 2 out of 5 people who claims they do an LS engine is probably actually an LQ4 engine out of a chevy truck with a head swap. LQ4's are 300hp OTB

Last year, Me and my buddy did a L76 with a 402 stroker kit and LS7 heads and Intake manifold in his pontiac g8. after everything it was a 6.9L V8 pushing 475whp. it was maybe shy 4 grand in parts and labor (because we already had the engine) and did most of the labor ourselves. The L76 is 324 whp (366hp crank) so your looking at 150 hp gain really with just stroker, LS7 Heads, LS Cam, and exhaust. Could have been more but we Dyno'd before we broke the engine in fully. We took that car cross country on the hotrod power tour and was loads of fun






Check it out at 2 mins 47 seconds. Arkansas tire shops got its moneys worth that day lol

ZeRoSe7en

The LT and LQ might be a good option. How much boost do you think a stock block and stock LS1 head would handle? 8-10 lbs.?

Dream36

If going boost to with gen4 not gen3 (ie ls1 is gen3 ls2 is gen4) the heads are rectangle vs cathedral. What most guys that go boost the use the 5.3 (alum or iron doesn't matter) block with the 6.0 heads. My recommendation is to go to ls1tech and read some builds. Actually better yet join norotors it's a rx7 swap site (my build is on there as well). You will be able to skip the bs on ls1tech and get facts. Believe it or not those motors do well with boost. My local guy designs and builds customer cars and has done a fleet of vettes with over 800whp. I seen one better with 1500whp come out of there (ls7 twin turbo). Also the LQ designation doesn't guarantee iron block, the re were a few lq4 that were aluminum and my friend build a lq9 (6L) that was also aluminum.. Jus wanted to add the guy I mentioned is a high end kind of guy. I think his minimal charge is $10k. But his work is all custom, welded charge pipes and custom build manifolds. He even makes new oil pans from scratch as these motors have oil cooling issues (when dealing larger power). I used an oil cooler in my LS1/RX7 not for temps but for volume.

Pic added to show if it fit in this small car it'll fit the bigger bay of a SC. Excuse the mess, it was before completion, I never got around to taking a pic when it was cleaned up.

NYKnick101

The highest psi I've seen on a stock 6.0 LQ4 block is 15 psi +/- on pump gas. it made 588rwhp put into an IS300. (714rwhp with cam and LS heads) It was pulled out of a Chevy Savannah. If you dont know what a Chevy Savannah is, picture is below :-P Guess these old vans were good for something. Start digging through the junkyards buddy

Edit: Here is that LQ4 turbo IS300. This is what I meant by people claiming LSx with non actual LS engines
http://ls1tech.com/forums/conversion...l-startup.html