2muchboostNY

iTrader: (8)

Been doing lots of reading around as the time is approaching to pick out a turbo for my project. The chassis is a Nissan 240sx S14 chassis and the motor is an LM7 with GTO T56. Will be on 80 lbs injectors 93 pump plus meth on a custom cam.

The goal of the project is low 10 sec 1/4 the passes without too much stress or lag on the setup...aka as reliable as possible without being a dog in the streets. Its a weekend cruiser but I would like to drive it to work at least once a week in my 80 mile round trip commute.

Was looking at the BW S475 but feel that it would be too laggy even with the smaller T4 footprint.

I am interested in the BW S472 but there isnt much information on that setup. Also looking at the VS Racing GT45 74mm and the GT42 75/75.

Hoping to stay T4 if possible and looking to spend about $700 at most as this is a somewhat budget build.

Look forward to your feedback folks.

Fondle

iTrader: (4)

TC78 with a .96 a/r is what I have and it is perfect for what you are trying to do, they have a small frame too and fit easily anywhere .

2muchboostNY

iTrader: (8)

Thanx Fondle! Read a bit about them so that is def a contender for me. Do you see any back pressure issues with the setup? I am planning on running the 862 heads but how are the 317's treating ya on the street? Hows the McLoad treating ya? I ended up going with a Monster 9" Racing Setup because of the price I got it for and some good results with this clutch. Take the setup to the track yet?

I really appreciate the advise and input.

skiziFiziks

iTrader: (3)

Whats up man found one of your posts!

While I have sidelined turbo as I wait on more funds, the turbo I really favored was a Precision Turbo 7675 CEA w/ .96 A/R. Pretty sure this turbo, although out of the budget is a similarly sized turbo to the one above. It is pretty much the size you want for a 5.3 that would pull hard all the way out to ~7k and let the engine move like its N/A in the lower rev range. Only downside is it's difficult to find used, and is somewhat pricey at ~$1600 new. That TC78 looks like a nice option, it will certainly be something I have to look into.

-Alex

2muchboostNY

iTrader: (8)

Sup Alex, yeah I have used PTE turbos in the past and would love a 7675 but this is a budget build unfortunately. Because it is a budget build I have been tossing the idea of a a BWS472 only because the shop I have dealt with has one available so I could grab it for a deal. Only hesitation is that there isn't much info regarding the S472.

The TC78 looks it would do the trick for a reasonable price.

Because it is a budget build I'm also looking at the VS Racing GT45 74mm.

chiaj144

iTrader: (4)

For a low 10 you could probably get away with a MPT70. I went 10.50 with one on 12lbs or so with a 1.68 60'. The MPT76 would get it done as well as the GT45 or the On3 76. These are all T4 and package well. Your car should be pretty light so I don't think your going to need to make a ton of power to reach your goal.

2muchboostNY

iTrader: (8)

Chai....thanks for the info and feedback.

I believe my car should be somewhere between 2850 to 2900 lbs give or take a few lbs when its all said and done. Planning to take the car up to 18lbs with the meth on a somewhat conservative tune. I have been looking at the 69mm GT45 and the On3 but wanted a little bit of wiggle room in case I decided to up the ante down the road. Wouldnt want to get a custom cam spec'ed out and then switch the setup for something different down the road.

geoff17

If you are on a strict budget and are only aiming for low 10's then my vote would be the tc76/tc78. I had a tc76 on my lq4 and was able to run a 9.86@140 with it. I recently switched to the PT7675CEA and absolutely LOVE this turbo, makes ALOT more power and absolutely no difference in spool. Also the same size pretty much as the tc. Another quick comparison on the tc or pte turbos are that my tc weighed 18lbs and my pt was 19lbs, any of those borg turbos you are looking at are HUGE even in the t4 setup and are 40+lbs.

Sarg

iTrader: (6)

Nah, the 300 series borgs are not nearly as big as the 400 series and can still make plenty of power. That s372 I am not familiar with though. I would call Jose at Forced Inductions and get his opinion on that one.

2muchboostNY

iTrader: (8)

Geoff...I agree with you there, if I had the extra cash or if I can find my way to purchasing one I would love the PT7675 CEA. I have seen some results with that turbo and its impressive. Plus I had used a PTE 6766 with my 2J setup and loved the design, power capabilities, and quality of the part. I have been looking at the TC78 but its a bit above the price range I want to spend though it is very compact and would suffice for my goals.

The BW is a bigger size but I have seen people stuff the S475 though it takes some creative thinking. I am going to reach out to Jose and see what he think about the S372 though I feel terrible I wouldnt buy it off of him as its available to me from the shop I mentioned before.

Since I am sticking with the T56 its a little difficult for me to gauge how some of these builds relate since most of them are using auto trans. I know many factors will come into play with 6-speed including driver skill etc. Just want to make sure I pick a turbo capable and appropriate enough for the build. Wish I didnt have other expenses at the moment, that would allow a much nicer budget regarding this build but tiss life.

Ryans99ls1

iTrader: (16)

I also made the switch from a TC78 to a PT76. You dont need to shell out the cash for the billet/CEA version. Just buy the cast 76, its what i have and i havent seen any differences in power compared to the billet version. Its an outstanding turbo for the money. My car picked up 60whp at the same boost level after the switch. its at full boost by 3500rpm, the transition is QUICK, its a perfect turbo for a street driven 6spd

jay_rich

iTrader: (8)

To give ya an idea my buddy built his S13 with a 2JZ and a S372 race cover T4 .90a/r. Not as big as a 400 series but still a decent size turbo. It still a 83mm wheel just like the T4 or T6 1.10A/R S400. I think the S372 runs around 950-1000 for the stock cover one. Im sure that turbo would perform great on a 4.8/5.3 platform. We already know the T4 S475 does.

Jay

geoff17

Ummm not sure you read my earlier statement but the billet wheel def will make more than the cast. On my car I picked up 100whp at 1psi LESS boost than before.


Back on topic, OP what are you looking to spend? A box stock tc76 or tc78 is $793 on huron speed's website and I am sure would be cheaper if you called them. Any of the s472's are more expensive than that by a good bit on forced inductions website. I have seen the t4 versions of a borg s475 and it weighs the same as my buddys t6 s475 and are dang near identical in physical dimensions. Considering this is going in a 240 I would think you would want something that will package a little easier plus remove 20+lbs off the nose of the car.

Ryans99ls1

iTrader: (16)

I picked up 60 without a single tuning change and with lower compression. After i actually tuned the car im sure i picked nearly 100hp at the same boost level. I left the shop with 130hp more than i came with and all we did was some tuning. The HP/$ on the billet wheel isnt there to me.

2muchboostNY

iTrader: (8)

Geoff...honestly looking to be as cheap as possible lol. I was looking to spend $700 or less but with all of these cheaper options like the On3 or even the GT45, I wouldnt be completely be opposed to giving them a run if it came down to it. The space in the engine bay is an issue that will affect my choice. I have seen an S475 in T6 frame in a 240sx chassis but it is tight and will require some creativity.

Actually the S472 with 83mm and 1.10 a/r can be picked up for $650ish. I am hoping since I have dealt with this shop in my previous build I would get a decent price cut.

@Jay....any chance you have some dyno and/or track figures for your friends setup? Would be interested in the turbo characteristics using an I6 though it should behave a lot more civilized in a V8 .

2muchboostNY

iTrader: (8)

Sorry about any confusion. Just realized I wrote down BW S372 in one of my threads when I was referring to the S472. Makes a big difference in the BW series when you are looking at 300 vs 400 series turbos.

LilJohn

Had a customer in Sweeden make 653 rwhp and 600 rwtq with his Lq4 and S400 72mm 83mm turbine 1.10 T6 turbo on just 9.5 Psi recently... its backed by a T56 and he says he was making the full 9.5 psi of boost at 2800 rpm... Car has my stage 2 camshaft in it...

With more boost im sure it could make some really good power. This is one of the first guys I have seen use the 72mm version of the turbo... The results turned out better than expected. This unit on a 5.3 with a manual trans would make just as much power..gonna take a little more boost to get there given the difference in displacement with this build.

btw.. the torque on that dyno graph is in newton meters.. not ft lbs.

2muchboostNY

iTrader: (8)

LilJohn....thank you so much for that info. It's been really hard trying to find data other than flow charts on the S472. I am perfectly fine with running more boost so that won't be a concern for me especially with the meth. I wouldn't mind a turbo that kicks in at around 3k-3.3k.....hmmmm the hamster wheel is turning.