yup they are close. The precision turbos that sp runs i think have a little more flow capacity in the end, but I'm not turning it up to 40psi to find out lol

I still have those teeny stock sleeves.

May do cams this winter to help the motor out a little

Tom

 

For a DD in CA? Maybe not a good idea from a reliability prespective. Without supporting mods to the drive train, hooking up that much power will be tough.

 

It really makes no difference how much power he wants to make as a DD, because with a turbo that big he will just be lagging around town anyway. It will never get into boost.

Why on earth you would want a huge single turbo daily driver with 750rwhp or more is beyond me. That **** sounds fun now but when (if) you ever do it and you drive it I bet the cool factor wears off real quick when you realize you have the most unstreetable powerband ever.

But look at it this way, at least you'll have a cool dyno sheet to show people, right? Which I would have to suspect is the real reason you'd undertake such a project.

 

OP use a gt40r

 

I've driven 600whp 35r 4cyl cars on the street and I didnt find them lagy at all, so I would assume another 1.5liters of displacement, thats like 40% bigger, for an other 150whp would probably leave you with a very similar if not better power band, no? Again this is if turbo sizing was correct for the application \, something like a BW S368 ET would get you there in a very un-laggy fashion!

37r's aren't considered laggy on this application and do over 700whp? But I guess everyone has a different idea of whats laggy and whats not...

 

^ What are you talking about GT35/37's for? The OP is talking about a GT4788R

Dont compare apples to oranges. If my 60-1 doesn't spool until ~3200rpm, what do you think a huge turbo like the one the OP is suggesting will do?

If you want as much power as the OP is looking for, and you want to daily drive it, you are crazy not to go with a TT setup.

 

Nothing wrong with a gt47 and it WILL spool. On a 3.5 you will probably see around 30psi by 6k. If your revving to 8k then it would be killer, but for 750hp it is absolutely asinine. If your dead set on a single get the Powerlabs kit or do an STS and swap the turbo out for a 40r.

 

Tyler give me a ring when you get a chance your number did not register on my phone.

Luie

Sorry for the thread jack

 

IF I did a single it would be with one of the new 62mm billet wheel turbos that SP has. They are capable of about 600-650whp each.
Spool is decent with two on the shop car so imagine how it would be for 1.

Tom

 

I wouldn't, unless all you care about it spool and high octane. A single 62mm on a 3.5 is a joke. Even a 67mm is on the small side. Why have to run a small turbo at a high psi when you can take a bigger turbo and make the same power with less boost, and in turn less heat. Sure it will lag some more, but I would gladly take the 500+rpm in lag to not choke on a small turbo.

 

I said IF........thats why I did middle twins.....best of both worlds

T

 

^ Quoted and highlighted for future reference.

 

You said IF you did a single you would use a single billet 62mm. I didnt miss anything.

 

sure thing

 

Well, it's one thing to say that you wouldn't choose a single 62mm turbo for your own setup. But to call it a joke is another thing all together. The Precision billet 62 puts out GT37R power (700whp) with GT35R-like spool. So are you implying that the turbo selection(s) for PowerLab kit are a joke???

 

Yeah I was gonna say, the guys making 650-700whp on 62mm turbos would probably tend to disagree that they are a joke on a 3.5L lol. where do some of you guys come up with this stuff?

 

Your a little rude you know that? Did he not mention 750whp? Can we not suggest better options to get there?? Is that not the point of a forum???Geez....
I said 35r on a 4cyl car, we've ran a 72mm on a 1.9 liter before(10.50's in the quarter all day fwd.). turbo cfm/displacement ratio is one way to look at it....
I was just suggesting that a 750whp car can be totally streetable with an appropriate turbo for our v6..also 3200rpm is super quick spooling in my books,thats what I mean about different individuals dealing with different amounts of lag.
Lastly TT setups arnt necessarily more efficient, its actually quit the opposite, its more of a packaging thing...all things being equal(total cfm flow out the compressor and threw the exhaust ect..), the single SHOULD spool faster due to wheel to housing clearances(ie. efficiency goes up)..
now in a car like your with your long piping to the turbo you do loose alot of heat energy, and you have alot of area to fill since every thing pre turbo is considered "manifold" So hey you might even be right, on this application twins might even be more efficient! But thats cuz "all things are not equal" due to turbo placment, again going back to packaging.


sorry for the rant, heres some pics to make up for it.

BW S372 = 72mm, divided twin scroll, twin 44mm gates, 1.9 liter motor,4cyl Dont know what else to say....its a street car, its 700whp, its on e85(30% more exhaust mass helps with spool lol) its gone 10.50....
spools on here and its good for over 850whp so it should spool on the Z, no?









This thing is sooo hairy, comes on soooooo strong that it usually spits ruber off the slicks on the dyno lol.

 

thats about as much of a street car as the titantic was waterproof. Maybe you mean, street legal bc you surely arent driving that thing 30 miles in stop and go traffic.

 

Also, the GT47 is very difficult to fit in the engine bay for a drag car let alone something you want to daily drive. I would recommend a GT42-76 for a daily driven engine.

 

sorry the track and prep photos have the bumper off, which I guess make it look unstreetable or maybe its the turbo placement?? But actually thats what every one wants to do here in the city, did you see my build thread I started here?? my turbo is in the front bumper in my Z.
Also here is some more pics of font bumper dialy driven civics from the city.

Keep in mind everyone obviously has have some sort of low profile "hks mushroom" type filter for street driving lol








This is just "how we do" around here

Again sorry I'm not here to dispute anything, I just wanted o say it is posable to drive a big Hp car on the street. Thats all.