boosted_D

iTrader: (1)

Gentlemen.... I would like to hear power numbers for anyone using either a 57 trim garrett t3/t4E or a precision sc34 aka 3431E, as they are about the same turbo.

My setup I'm building is a D16y8 with a stock head, and vitara/custom rod bottom end. I have a brand new precision sc34 for it. It would be best to hear from D owners, but B series input is welcome.

I chose to go with the .48 a/r hotside, this is what has me concerned, do I need the .63? How bad will spool up be? I did this for better spool up/ street ability. BUT I am hearing some bad things, that I may only make around 300 whp with this hotside even at 22+ psi!??

Needless to say this is not acceptable, I want 350-400 whp.

So please post up your numbers using a 57 trim, please give motor, stock or built/cammed head, fuel used, boost pressure, when you get boost spool up, and most importantly what a/r turbine you have, .48 or .63 a/r.......Thanks guys

I know this info will help out some others make decisions as well.

kbouchard1092

i would NOT get the .48 a/r !!! Stick with the .63

It is going to be hard to get 400whp with that turbo on a D16. To put in perspective i have a DOHC and i put down 411whp at 20psi. My Previous tune only 385whp at 16psi.

I can tell you for sure with a .48 you wont come close to 400whp , prob not even 350.

WIth a stock head and cams youre are going to have to push that set-up to get to 350whp. Alot also depends on youre tuner. I would get a good set of injectors ID 725's should be good for youre set-up . If you get to 350whp i would be happy with that if i were you.

TheShodan

iTrader: (14)

Very well put..

97_coupe

I would also be interested in knowing what they start building boost. I will be doing a similar build soon

kbouchard1092

what they start building boost? You mean when the turbo builds boost? Pretty Vauge.

It will build 1psi at 2000rpm. Should really start building after 3500. What boost level are you talking about?

On the D16 set-up listed above the rpm it would take to build 22psi? Well Compression,Cams and turbo manifold will all affect that, and the ovious Turbo choice. As well as the Boost controller. So without details its tough to say. Id say 4800-5300rpm to reach 22+psi on a D16. leaning more towards 5k +. . EBC tend to ramp boost up slower vs a MBC you will hit target boost faster. The faster hit will create more wheel spin tho.

Just my hyopthesis though. i dont have as much experience with D series. On my B18 im looking at 20psi around4500 on a 60 trim.

boosted_D

iTrader: (1)

set up is a stock head, port matched with intake mani and exhaust mani, ported cast turbo manifold, full 3" wide open exhaust, MBC, compression is 8.5:1 with vitaras/ custom rods.

Yeah I'm wondering if I NEED the .63 to achieve 350-400 whp, or if I can do it with the .48 ? And yes I'm wondering when the .63 will START building boost vs the .48, and when I might see full boost with the .48 or .63, I am assuming full boost will be somewhere between 22-25 psi.

kbouchard1092

There isnt going to be a huge difference in spool from the .48 vs .63. They should both start building boost at the same time... The .48 may a few 100 rpms early, nothing youre really going to notice. However you will notice that the .48 is going to run out of breath in the upper rpm (which is where u make peak Hp). You should have went with .63 if peak hp is youre concern.

Also at 22-25psi youre really pushing it past its efficency. Without water/meth or race gas there is really no point pushing the T3/T4 trim turbos much past 20psi. Especially with the .48ar. i have noticed you really wont gain too much more power after 20psi on pump gas. I wouldnt go over 20psi. See what you get there and be happy with it. If you want more power or wanted 350/400whp on a d series you should have choosen a different turbo. Hate to be the bearer of bad news...on the bright side it will still be a fun set-up. You would have been better off with the 50trim and a .63ar. You would have a better powerband and still have simliar peak hp then the 57trim with a .48

97_coupe

Thanks kbouchard1092 for the info

boosted_D

iTrader: (1)

Indeed, thanks for the info, I still have the turbo sitting on my counter, I bought 3 weeks ago, I called precision and they said if I pay to ship it back they will gladly swap to a .63 turbine free of charge! woot, .63 it is then, I want to try for 400 whp, and I will add water/meth if I have too.

Whiterice-gsr

i have a 57 with .63 a\r 12 psi at about 3800 rpm, im going to go down a size, for what i want to do with my car i want more response.

osc007

iTrader: (4)

I currently have a 50 trim on my setup and I put down 338whp at 15 psi so the 57 trim won't be much different but then again I have a ls/vtec with headwork, built bottom end blah blah blah... so this might give you an idea of a 50 trim. Full boost under 4 grand but flattens out after 6500 or so it seems; thus why I am going with a silver surfer instead.

boosted_D

iTrader: (1)

Good info guys, BUT WHERE'S ALL THE D GUYS RUNNING T3/T4'S AT???? I know your out there, chime in....

On another note, my plan was to run the 660 cc injectors I have with 93 pump, and add water/meth if needed. I just discovered that there is an E85 station 25 miles away though!
Would I be better off just running E85??? I'm sure I will need bigger injectors though, that's another $400 on top of the $1200 I still need to finish How much power could be supported with E85 and 660cc injectors? More or less than with 93?

Whiterice-gsr

why have one cam when u can have 2 lol. im thinking the gt3251b i was originally gonna get a surfer but like i said im shooting for response.

non-VTEC

my 57-trim .63 a/r is making my B20/vtec 440+whp....it's a great turbo...

dcmatt

iTrader: (7)

There's a single cam thread. You might can glance thru and get an idea.

Better yet check out Evans tuning dyno database you can filter d series and power range. Sure you can find a graph for a similar aetup

Whiterice-gsr

so with your b20 vtec what rpm are u getting to full boost. and what is your boost level to make 440, is your curve flattening out alot above 6 grand? im curious about pushing mine.

NonovUrbizniz

for e 85 it's easier to get your goal but you'll need bigger injectors. I think id 1000's are the standard for that hp range on a methanol.

dcmatt

iTrader: (7)

Also curious on the 57 trim. Theshodan told me the a 60 trim maxed out at about 440. Didn't think a 57 would get there.

Whiterice-gsr

more displacememt.

dcmatt

iTrader: (7)

Nevermind just realized his is a b20

non-VTEC

power is quite flat above 6k. full boost comes in around 5700-6000rpm redline was set to 8000 and power was still climbing. max boost at dyno tune was 17psi

http://www.dynamotorsports.ca/dynogr...4VarexDyno.jpg

http://www.youtube.com/watch?v=LyCKij30TIY

Khnemu

iTrader: (1)

I have a Vitara D16Y8, stock head using a Garrett 50 trim, made 320 whp @ 7,000 RPM at 17.8 PSI. Full boost around 5,000 rpm

Whiterice-gsr

thats very impressive for a 57 trim at 17 psi. nice man. youre in toronto, who are u using for tuning?

TheShodan

iTrader: (14)

That looks like Tony the Tiger's place.. Dynamotorsports.

non-VTEC

yes it is...

tony did the tune for me...will be going back again this spring with new/better inter cooler and a little more boost.....