falxzzr

So i am close to finishing my kit, and just the important stuff left to go. This is my first turbo build and I am almost overwhelmed with all the info I have been sucking up for the past couple of week, I didnt get viren or Huron Speed to answer me today (no biggie, im sure they are slammed after the holiday) so I figured I would let it all hang out to the masses. This is a budget build, so please dont recommend me a 1200 dollar turbo or something. I am going to sell my NA setup and spend just a little to finish out the turbo setup.

Here is what I currently have or have settled on

• 6.0 iron block (owned)
• gen 4 rods and pistons (owned)
• ARP studded heads and block, arp rod bolts, arp cam bolts etc (owned)
• going to a stock 317 head with GM head gasket (we think comp will be 9.8ish:1) w/all new valvetrain aka BTR 660, hardened pushrods, upgraded trunion rockers etc (selling my CNC ported 243s that are currently 11.5:1 comp)
• stock ls6 intake and TB (or ls2, whatever i can find cheaper) (will be selling off my FAST 92/92 setup) (UPDATE: ls6 intake and TB PURCHASED)
• aem 400lph e85 pump currently, stock fuel system beyond that (owned)
• Huron speed v3 t4 no A/C kit (this kit is complete, with both downpipes, turbosmart wastegate and BOV, 7.5 pound spring in WG) (owned)
• strong built 4l80e (will handled more than bottom end, no issues) (owned)
• moser 9 inch 35 spline/braced, wavetrac w 3.50s (also should handle more than bottom end) (owned)
• I also have a lot of the little odds and ends. Map sensor, MBC, boost gauge etc etc (owned)

My dilemma

• I am looking at the billet 7875, which i am under the impression will be limited by backpressure on the 6.0, but i like the physical size of it and a lot more people have ran it (UPDATE: PURCHASED VS BILLET 7875 FROM HURON SPEED)
• I am also looking at the billet s475 75/83 1.10 ar t4 turbo, which i think will fit the v4 kit size wise, and i think is better for the 6.0, but i am asking because i am not sure if it will even fit the Huron kit without modification (possible issues with manifold setup since its dual feed?), let alone physically fit in there
• cam (selling NA cam, just wont work for turbo. i guess cam selection depends on turbo.. again, asking for some advice here) I have looked at LJMS stage 2, or even the very similar summit cam that is 150 cheaper but the same basic cam (UPDATE:Summit PRO LS 226/230 .605/.575 PURCHASED)
• fuel injectors (UPDATE: Siemens deka 80lb PURCHASED)
• Meth kit (UPDATE: PURCHASED)

This car is a street car that made only about 5 track passes last year, but I drive it to car shows and events all summer long etc. want to keep the power below where the bottom end is in danger, so maybe would like to see 700-800whp. It definitely does not have to be all top end, just fun to drive and fast.

Hit me up with recommendations, critiques, advice, and most of all, what turbo to go with??


updated 1/1

falxzzr

If anyone has real life experience using a BW turbo on the huron v3 kit I would be interested also, as I cant find any good info if its a straight bolt onto the kit and DP or if im SOL using one

Lsxford

iTrader: (6)

I am interested as well, my on3 7875 is actually a 7665 and is getting some shaft play. I have a virginia speed stage 3 turbo cam and a th400 3000 stall.

I'd love to stick a s480 t6 on it, but really wanna stay t4 and dont need 1000+ wheel. I am contemplating the vsracing cast t4 s475, mainly price, but I believe it should get me to my goal easily. Which is 6.0- 6.50s in the 1/8th in my single cab Mazda pickup.

Not trying to hijack OP, just didn't wanna make a new thread when you have the exact same questions LOL

falxzzr

Nah man this is what i want to hear! im looking at the billet version of either turbo but i just dont feel like I know enough to pull the trigger.

80/TA/LT1

iTrader: (2)

falxzzr

im 100% doing billet either way

Lsxford

iTrader: (6)

that is hard for me to believe, but viren has no reason to lie imo. For it to flow 100hp more airflow seems pretty substantial. That kinda swings me back to the billet side tho lol

V8sounds

iTrader: (1)

A billet 7875 will bolt right up to the kit, and make 700whp. For more than that you will need a bigger turbine and a different downpipe for the larger turbine.

for over the 7875 I think it really starts to make sense to look into a billet s480/s488. Ideally with a 96mm turbine.

Kfxguy

iTrader: (1)

You guys need to check out the end of my build thread, link in my signature. I just changed from a cast on3 to a billet vs racing 7875. the billet 7875 would not be a bad choice by any means, but be aware that the outlet is undersized by .015-.020 so the 3" pipe will not slide into the housing to make a better seal.

a better choice if you have the cheese would probably be this

https://www.on3performance.com/shop/...harger-1035hp/ <<<<<this one being the more powerful choice i think

I think i'm gonna sell my billet turbo and get the above

or this

https://www.on3performance.com/shop/...-turbocharger/

Kfxguy

iTrader: (1)

it did make a noticeable seat of the pants difference when i swapped from a casr 7875 to a billet. I just did the swap Saturday.

JoeNova

Billet S475 if it'll fit.

falxzzr

Ive actually read all through your build thread and turbo choice thread. I looked at that BMF but i was seeing other people saying that for all the fancy specs its not making any more power than a regular billet 7875. I dont think there is a lot of data out on that thing yet. Also, for the size, I think i can go s475, agan, as long as it will fit. Im trying to determine that before i buy it lol.

I wonder if the on3, the huron speed, and the VS billet 7875s really turly are the same turbos, because if so, they would all have the outlet sizing issue.

I am looking at the VS racing rather than the on3, even if it is the same exact turbo, built in the same factory, i am willing to pay a couple bucks more for VS service over on3s known slow/bad CS.

falxzzr

Yea i was hoping to get some real life experience from someone with a v3 kit on fit and any modifications needed if any.

Game ova

If all you are looking for is 7-800whp, a cast 7875 will get that done easily. My junk put down 740/1045 (torque is probably an honest 900). I definitely wouldn't buy 80# injectors though if you are using e85.

Kfxguy

iTrader: (1)

truckdoug

iTrader: (25)

billet s480 with the big turbine and the T4 housing. it's big but it'll fit. mine made 700 wheel on 9psi, e85

falxzzr

So a little update, today I purchased a meth kit, dual nozzles etc. So ill update OP to reflect this, and we can just forget about e85 for this build

falxzzr

Did you use this on an on3 v3 kit?

falxzzr

Hmm.. thats good info.

falxzzr

That seems on the high side of what I have seen. What kind of dyno was this? what was the rest of the setup?