Milanogisser

Ok well Ive been on boost for about 4-5 months now.Setup is as follows:
T3 .42 .48
drag gen3 mani
turbonetics deltagate
hks bov
jrc fmic
dsm 450's
uberdata with basemap by xenocron
Motor is b17a

Now my problem is this.Obviously the turbo is small.Im sure I could achieve more top end by upgrading to a t3/t4.Yet I was wondering if that was the only thing i could do for more power up top.It just annoys me when Im racing srt-4s and evos and I pull them by half a car until about 7000rpms in third gear.As soon as i shift into fourth theyre gone!Just wondering what the most effective ways for more top end are?

FooK

do you have 2.5" charge piping all the way thru? If you don't, that will help alot up top.

Milanogisser

my piping is ghetto.Mostly 2.5 and 2".You really think thatd help? I heard 2" was ideal for 300whp apps.

accordepicenter

the turbo will help, get an exhaust cut out and bigger charge piping. I think the turbo will make the most difference. Youd probably notice a big difference going to a t3 60/63 over the 42/48

FooK

dyno tested... 2" piping on a ZC DOHC made 185whp, changed out to 2.5" and re-dyno'ed by coincidence shortly after, 198 or 199whp. 2" sucks for top end. Change it to 2.5" throughout and I am telling you that you will notice a difference...

formsim

what psi are you pushing now on that turbo just curious

FooK

its a friends, on those two dyno's ...8psi he tuned for 10psi later and made like 218whp at the last hmt nw dyno day.

Milanogisser

Depends on how ruthless I get lol.Usually 9-10psi
Got crazy last night started spikin like 13-14psi in fourth gear.

Milanogisser

I believe you and all but Im not too concerned about the piping.Like I said my piping is all more than 2".The elbow on my compressor is 2" and everything after that is 2 1/4 or 2 1/2.I dont think my charge pipes are a problem at the moment.Thanks for the input though.I need all the help you guys have to offer.
Oh yeah copy pasted this from g2ic turbo giude-[As opposed to exhaust system diameters where bigger is better, here bigger is definitely not better. The larger the pipes are, and the longer the pipes are (plus the larger the intercooler) the more volume the turbo will have to fill with air before it becomes pressurized, creating lag. But there is another side to the coin. If the pipes are to small they can prevent sufficient air volume from reaching the engine even though the turbo is more than capable of providing the required volume. Generally 2.25" is good to about 400 horsepower.]

formsim

never used a 14b myself but lookin at its compressor map it is not meant at all for high end, nice small turbo for quick spool and steady boost till around 6k, while pipping might help a tad high end, the turbo is not going to be happy and the efficiency will be horrible greatly reducing that turbo's life. Just do your self a favor and go t3 .48/.60 , quick boost strong all the way to shift with a turbo thats meant for it ;-)