well im in the process of building a d16z6. my goals for this project are 300whp at 14-15psi on 91oct. pump gas. my question is which exhaust housing would reach my goals MORE efficently. i know the .48 will spool quicker but will it get to 300whp at my planned psi? or should i go with the laggy .63? will the .48 hold power to 7200 rpm? help me choose!!!!!

setup
.20 over CP 9.1:1 pistons
eagle rods
ACL bearings
??mini-me mani.??
possibly a zex cam

 

**** personally i would go with the .63. it will make your car feel faster from all the lag

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blaster834 &raquo;</TD></TR><TR><TD CLASS="quote">**** personally i would go with the .63. it will make your car feel faster from all the lag</TD></TR></TABLE>

i know it will "hit" harder but if i can make the same peak power and have a better power band then id go with a .48. but if the .48 will inhibit the power prodution then id go with the .63. i just want to hear some input from people.

 

im about to build my motor and im looking for the same numbers.

 

GT3251E

I'm using a .60/.63 t3/t04E and making 300+. Full 3" exhaust open to dynomax muffler = 0% lag virtually. But the gt32 would make me cream, I suggest you invest in that one. Take a look at a map and you'll know why.

 

the thing is i have a new sc34 with a .63, but i can get it switched out to a .48 for free. this is why im limiting my choices. but i will look into this turbo for future reference.

 

bump!

 

I would go with the .63 yaheard

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rextec &raquo;</TD></TR><TR><TD CLASS="quote">the thing is i have a new sc34 with a .63, but i can get it switched out to a .48 for free. this is why im limiting my choices. but i will look into this turbo for future reference.</TD></TR></TABLE>

Keep it @ .63 if you already have it. You'll want more....they always want more....

 

.48 A/R is what you want on a D16 with a 7200rpm redline. Hell, I plan on making 300whp at 15psi with my SC50 and .48 A/R.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">.48 A/R is what you want on a D16 with a 7200rpm redline. Hell, I plan on making 300whp at 15psi with my SC50 and .48 A/R.</TD></TR></TABLE>

How you will do that ? I did 287 whp at 15 psi on a SC50 .63ar at 7750.... Im just asking the question...

 

BTW in order to help this guy and for my personal information what would be the best ball bearing turbo for a D serie in the same range ( similar or better specs ) than the SC50 .63ar.... cuz IMO it will spool up faster with the ball bearing no ??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by yellowturbo &raquo;</TD></TR><TR><TD CLASS="quote">

How you will do that ? I did 287 whp at 15 psi on a SC50 .63ar at 7750.... Im just asking the question...</TD></TR></TABLE>

Didn't ELSpool make over 300whp at 15psi with this turbo? Also were you on a Mustang dyno?

Another thing to think about, ARFab's D16 made over 400whp on the SC50 .48 A/R.

 

yeah he did it at around 16-17 psi if I remember on a .63 ar NOT A .48ar like you said in your original post....

Im just saying that if your goal is to hit 300whp AT 15 PSI WITH A SC50 .48AR WITH THE STOCK REV LIMIT just forget it....

 

yes we were on a mustang dyno...

 

I am going to be a on dynojet which will show 15% higher #'s and I also have 10:1 C/R. My tuner is confident that I will see 300whp somewhere around 15-17psi. Also the difference in power between the .63 A/R and .48 A/R is not going to be big.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">I am going to be a on dynojet which will show 15% higher #'s and I also have 10:1 C/R. My tuner is confident that I will see 300whp somewhere around 15-17psi. Also the difference in power between the .63 A/R and .48 A/R is not going to be big.</TD></TR></TABLE>

Ohh ok if you see this like that it wont be a problem to see 300 whp on a dynojet with 10 : 1 cr.

 

so with the sc34 (which is the next bigger size from the sc50 in the precision lineup) i should have no problem getting 300whp at 15psi with the .48, and having better spool time?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rextec &raquo;</TD></TR><TR><TD CLASS="quote">so with the sc34 (which is the next bigger size from the sc50 in the precision lineup) i should have no problem getting 300whp at 15psi with the .48, and having better spool time?</TD></TR></TABLE>

Correct.

Even if it didn't make 300whp all you would have to do is crank it up a couple more psi.

 

this is a pm that ARTURBO sent me after asking him the same question. i think its interesting and something i didnt take into account. i think im gonna go with the .63.

(9:41 PM 10/12/2004) Arturbo: Well because with a .48AR housing you have more exhaust back pressure. More back pressure= exhaust contamination. You have a pressure ratio of 1.5:1(estimate) and with all that back pressure the exhaust can not release all the gasses and they stay in the head during the next intake stroke.
Hondas are meant to be reved and a .63AR has always worked out for me.

 

I run the .63 ar on my SC-50 as well. Sometimes the bigger AR is a better match with the turbine and your spool time really doesn't increase at all. However, if your goals are more than 300whp, and a redline above the stock 7200rpm, I would suggest going with .63 ar Not to say you can't hit it with the .48ar, you just might get to your goal faster/easier wth a bigger housing and give you the option of taking it up a ntoch with that turbo later in life.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rextec &raquo;</TD></TR><TR><TD CLASS="quote">this is a pm that ARTURBO sent me after asking him the same question. i think its interesting and something i didnt take into account. i think im gonna go with the .63.

(9:41 PM 10/12/2004) Arturbo: Well because with a .48AR housing you have more exhaust back pressure. More back pressure= exhaust contamination. You have a pressure ratio of 1.5:1(estimate) and with all that back pressure the exhaust can not release all the gasses and they stay in the head during the next intake stroke.
Hondas are meant to be reved and a .63AR has always worked out for me. </TD></TR></TABLE>

Don't forget you said you are only revving to 7200rpm. .48 A/R is going to give you a broader powerband and better spool up below 7200rpm. If you were going to be revving more than 8000rpm than you would want to consider the .63 A/R.

 

.48 all the way. Dont listen to the guys saying to keep the .63

The reason being that D series gear ratios suck monkey ***** for coke. Even z6/y8...

...unless you want to fall out of boost everytime you change gears.

 

With a z6/y8 tranny, I shift a 7500rpm and fall back to approx 5100rpm, I don't fall out of boost, and its even better if your keep your foot the floor. But then again what would I know, I only run 12.5 in D16Y8 powered 4dr that weighs 2650lbs without driver...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ELSpool &raquo;</TD></TR><TR><TD CLASS="quote">With a z6/y8 tranny, I shift a 7500rpm and fall back to approx 5100rpm, I don't fall out of boost, and its even better if your keep your foot the floor. But then again what would I know, I only run 12.5 in D16Y8 powered 4dr that weighs 2650lbs without driver... </TD></TR></TABLE>

ok shifting at 7.5k would result in

2nd gear dropping to 4405rpm
3rd gear drops to 4911rpm

I dont understand at all how you say you dont fall out of boost at all.... maybe i was sent the .82 exhaust or something retarded