High hp turbo help
 

Still running the stocker right now but i was just wondering for a 900+ hp streetish truck what kinda size/brand twins would work nice. But here is the catch, i want to run the smaller turbo as a single until I need/can afford twins. Im really tempted to get a 66mm silverbullet as a single but that would obviously be way too big in a twin setup. Then thought maybe get a 62mm SB cuz it would spool nice but then im lost on the large turbo?

Any help/criticism would be appreciated.
Dennis

900+ on fuel? or on the juice

My personal goal was a 1000hp fuel only street truck. I realize my goal is somewhat "ambitious" and I have read enough forums on here to know it wont be cheap or easy but this is a long term project. I know that almost everybody on here will tell me it cant be done for a street truck but I still think it can be done. All that aside the direct answer to your question would be fuel only.

Dennis

tripples would be my answer to your question than. A set I would love to try if I had the truck/money/time is ... Start with a 66/73/.9T4 off the manifold with one of sdx's spool flanges, along with a good size external gate, two 64/71/.9t4 atmosphere chargers feeding the 66 with a external gate on the header. Gonna be a fair amount of plumbing with the flange and gates but it should spool quick and make some power with other supporting mods.

Tripple 63's have made 900+ on some cr's

I dont really think im a fan of tripples. The route i was gonna go was silverbullet 62 with a s475 or something like that. I would first use the 62 as a single and then upgrade to twins. The part that im unfamilliar with is the larger s-framed turbos. Any help there?

Dennis

If you wanna do twins 64/71 off the manifold is what I would start with, as for the primary the s478/92/1.1 a/r t6 gets my vote

Care to share your reasoning behind your choice?

the 64 has been the popular choice for singles on 12v's for a while, its just a good combo with that turbine wheel. as for the primary the 478's are more $$ than the 475's with a 96 turbine but they will spool faster and flow more air.

Just for the sake of arguement why not something like a 62 with a s480 ?

you could, but that 480 is very lazy on the bottom end. the 62 is a good charger but the 64 is better, spool up with either the 62 and the 64 is very close.

Ok so i should get the 64 first and then get a s478

When I do compounds I'm gunna put my 64 on top of a S480

that sounds like a plan, on that 64 are you planning on a t4 or a t3 foot?

Im not sure what is the main difference?

$$ and size ( which affects spool) .... your stock manifold and charger have a t3 foot the t4 is the next size bigger. The t4 will flow better and is cheeper than a t3 charger but it is non gated and will spool slower.

is the sb 64 normally/ work best as a t4?

that comes in a wastegated t3 also does not have the 71 turbine wheel, the super phatshaft series comes with the 71 wheel in a WG t3 housing.

Let me ask you this..... What would be the best ultimate setup on that 64 so that it would be best in the twin setup with the s478. I assume the 71 mm wheel would be best and i guess a wg is necessary (Also your thoughts on a BD turbo guard blow off valve) . Also off topic what injectors would you recommend for this setup? I was kinda thinking that 5x0.018 (DDP comp injectors are that size are they not?)with supporting pump work would be enough for 1000 hp but feel free to suggest a difference route. Again off topic, is it bad to have really big injectors and then under fuel them by detuning the pump untill i can afford that s478? If you havent noticed my theme kinda is a high hp build with high quality parts that build on each other. I just hate having to buy stuff twice... :td: Its a PITA trying to figure out the best order to get stuff......... So far my next move is a clutch, then a body job(damn rust!), and then my smaller turbo and injectors.

man the HUGE problem your going to run into is that a medium size single requires a totally different tuned engine to run correctly vrs a medium single and a big primary mate. your gonna have to make a sacrifice or save up and do it all at once. there is just to big of a jump to recommend parts that will work -well- in these two, WAY DIFFERENT situations

Expand on that for me. More specific if possible.

i cant go as deep as some of these other guys but here goes.

your trying to build 2 different animals at once, 2 different end goals that are 400 HP apart at best, if 1000 is even attainable for you. parts just dont interchange and work well together at these power levels. like taking a 7 second drag car and putting a factory cam in it! um... thats just not gonna work right. everything is a system and a hp#'s this extreme the system has to work very very well together or things dont last or produce what you want them to. i see no way how you could choose an injector that works well for a sub 600 truck and a 1000hp truck. its just to different. some parts are going to swap over, fuel plate, gov springs ect but many others will have far different qualities that wont jive. if i were in your shoes i would do some serious research and soul searchin to figure out what you really want your truck to be. i can maybe see 800hp being semi streetable but a far cry from safe on the road. you cant have an everything engine, you have to choose the qualities you want most

A 1k hp motor is not gonna be cheep to build, lots of time in cam/head selection along with the fueling side.

As for you question about the wastegates yes you will need one wether it be internal or external. The injectors is a tough one that depends more on what your gonna use for in injection pump.

Ok then well the clutch im getting will be one from south bend rated at 750hp so give me a build for that hp goal then. Still run twins or go large single? I think I want to use my stock p7100. The truck is a 94 with nv4500 so it should have the 175 pump if I can remember correctly.

I have another question, will the 64 be good enough for some light to medium towing? It would be around 5000lb to 8000 and it might see up to 10 000 like once a year. Im not trying to tow this heavy with 700hp but it would just be for a while untill my truck will be too overfueled.

yes, you can pull with a 64 prolly not super heavy it will be laggy with a 71mm turbine though
and you prolly wont get to where you want with your little pump.

If your going for a compound setup you will need to stick with either a 62mm or 64mm turbo.

oh yes you can ... there is nothing little about the 160/175 ppumps

If my goal is a 750hp daily driver, tow rig, sled pulling, hot rod somebody build me a perfect turbo setup. So far I'm thinking running a silver bullet as the small turbo with the ats pulse flow manifold. What injectors and dv's will get me to that power level with a 0 plate? Other than O ring and port/polish head is there anything else that needs to be done to my engine?

you cant have it all man... you forgot drag racer and 1,000,000 warranty in there

Well it will probably be phased out as a tow rig and daily driver and just be a hot rod to just cruse around in and have fun beating mustangs on the street and some minor sled pulling

now that you throw sled pulling in there its a whole nother ball game ... s465 74/83 .9t4 is gonna be your best bet now. can be driven on the street, legal for pulling, and can tow but it will get hot if you don't keep your rpms up.

As a single?

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Why would you say to run a s465 instead of say the silverbullet 66? I value your opinion and just would like to hear your reasoning....

yes as a single, reason I changed my mind is you want to sled pull. The s400 base chargers have a bigger stronger shaft than the s300 base. They hold up to the abuse much better than the s300's will.

Sled pulling is probably on the bottom of my list tho. I just want a fun and fast truck that i can play with. What would the spool up of the s465 be compared to the sb66? What about streetability?

close to the same as SB66 slightly slower.

What do you want to do with this truck? you have changed your mind several times in this thread:s:

ditto... make up your mind

It will mainly just be a fast street truck. By the time i can afford this turbo it will be retired from towing duty anyway so that is not a big deal. It wont be a designated sled puller either but it will likely see up to three pulls per year but it would not be for points, just for fun. So less performance here wont be an issue either. Same with drag racing, it will see very limited track time too. So basically im looking for the fastest spooling turbo that can support around 750 hp for a street truck. Im thinking a cam might be worth the money if I go with a big single. I dont know what keeps drawing me to the silver bullet 66. I guess because its 2.6 class legal, supports my power goal, has an amazing sound and comes with a shiney compressor housing. (Who doesnt love shiney things???? :jump: ) Sorry for changing my mind so often but I hope this clears things up? So my question now is pretty much, is this the right turbo for me? Is there anything I can do to help it spool up better? What injectors would be best (brand and size....was thinking maybe DDP stage 4????)

you sure that sb66 is 2.6 legal ... many of them fail tech for 2.6

No I would be lying if I said that I knew for sure. But it would mainly just be brush pulls so if I do fail inspection then its no big deal. My only concern is what would my setup have to be in order to spool this turbo on the street?

as stated before.
plenty of fuel
a cam
head work
patients