SilV8

Hey all,

Since my LS1 is down & apart due to issues I've been thinking about just doing a 5.3 with a single turbo setup in my 240sx. I would have to do some planning due to engine bay space etc & me not wanting to get rid of my functional a/c in my car. The car is not a daily driver but I want to keep all the amenities.

Below are a list of item's I already have & since I'm not too well versed with turbocharger sizes etc I thought I'd seek your help. My goal's power wise would be 550-600 hp.

*5.3 short block
*TSP stage 2.5 5.3 heads (2.02"/1.575" valves /already own, brand new never used. Bought them for my LS1)
*.650" Lift PAC 1905 Spring's w/ steel retainers (already installed in TSP heads)
*LS6 intake manifold (already own)
*Harland Sharpp 1.7 non-adjustable rockers (already own)
*Cam - undetermined
*T56

Basically I'd like to know your recommendations on a turbo that would meet my power goal on minimal-ish boost. I'd like to run a turbo that's small-ish framed due to space without choking it up top.

thank you!

JoeNova

550-600 flywheel, or at the wheels?

Personally, I would sell the TSP heads and the rockers and use it to pay for a cam and turbo. Any head will work for your power goals.

svslow

Agreed. The heads will work fine, but not totally necessary for that power level. The standard S366 would reach those power goals easily on a T56.

SilV8

550-600whp

Also, I know the TSP heads arent necessary however I have them & spent the money on them. They also wont hurt with a turbo setup, I have money & other item's I can get rid of if I need additional money. I already have money to buy a 5.3, truck manifolds & a cam if I do decide to go this route.

JoeNova

Depending on which pistons you have and which chamber they have, they could very well hurt a turbo setup.

simple

iTrader: (8)

I've got a complete stainless setup for a single T4 turbo LS in a 240sx. Manifolds, crossover, wastegate dumps, down pipe and mid pipe, all v-band clamps.
All for sale if you're interested. Would make the swap super simple.
PM me if you're interested.

You could make that power pretty easily with a small Turbonetics TC unit.

SilV8

Good to know. If I had a 5.3 they have a slightly dished piston correct? would there PTV issues because of the larger valves? I wouldn't want to be running a cam larger enough to come into any issues like that.

JoeNova

Those valves are only .020" and .025" larger than the valves used in the 243/799 heads which came on the flat top 5.3s. You shouldn't have any PTV issues unless you go unreasonably large on the cam.

SilV8

I appreciate the replies from everyone.

I decided i'm going to start a turbo 5.3 build for my S14.

I've already purchased a gen3 5.3 short block with the rotating assembly for almost nothing.
I also purchased a set of gen4 piston's & rod's from another member on here to throw in the block.

Bottom end is going to get a rebuild with all new bearings & rings. Since it's going to be rebuilt & its all apart obviously I'll get the cyl's honed for a good crosshatch on the walls & so the new rings seat well. I'll also likely open up the gap slightly on the rings.

I'll start a build thread eventually once I actually begin working on everything.

stevieturbo

Stick a 427 in it and forget the turbo ?

SilV8

haha I thought about doing a big n/a setup...but the ricer in me needs turbo noises.

stevieturbo

Most turbo brands will do a unit that can meet that easy power goal. Although the likes of BW tend to be physically larger than most. Just depends how tight you really are for space.

And then are you wanting a cheap turbo, or something better ? oil journal or ball bearing ?

regular 366 would probably get you there, or the SXE version https://agpturbo.com/borg-warner-s36...3-13009097049/

Might be worth looking for a largish turbine housing, AGP do a 0.96 for the 300's

kbracing96

iTrader: (25)

I've got a s366 on a stock 5.3 blow through carb in a 69 C-10 pick up and it's a lot of fun on just 9lbs of boost.

SilV8

Let's say I run a turbonetics 7875 on the 5.3 & a precision 39mm gate, do you think that'll be good for like 8-9psi min boost? I know that precision lists springs all the way down to 2psi for their springs but didnt know how realistic that was. not that I would even go that low ha

roastin240

iTrader: (13)

You will be able to run 8-9psi on a 39mm WG if its placed correctly. Most people place theirs incorrectly and run an oversized gate to compensate.

91 240

iTrader: (6)

i made 608whp at 8psi with a MasterPower T76 Qtrim on a 6.0 in my 91 240sx.

317 heads
Brutespeed cam
Patriot Gold dual springs
LS6 intake
60lb injectors
Wiseco pistons
Callies rods
home built manifolds, crossover, and 3" exhaust

TheLS1Lover

VS Racing 7875

SilV8

My friend actually has a Precision 7875 in his garage I may grab off him.

gametech

iTrader: (1)

Anything more than a t4 67mm would probably be overkill for your goals, but in a lightweight 240 everything is overkill anyway.