Charlie Moua

iTrader: (3)

I'm know that with FI you have charged air entering the intake manifold so TB size doesn't really matter. However I was thinking about getting my stock GSR tb shipped to Kingmotorsports for them to bore it out to 64mm only costing $150

is this a wise investment to my FI setup or should i just simply forget the idea.
My application will be mainly 5 to 10psi, mainly only 5psi daily driven. Would it be worth it for $150.

Boltz

i think stock gsr is 62mm and type R is 64mm, i dont think if would make that much of difference in power on a street tuned car, although you might notice better throttle response
my .02

Charlie Moua

iTrader: (3)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BoostRotter &raquo;</TD></TR><TR><TD CLASS="quote">i think stock gsr is 62mm and type R is 64mm, i dont think if would make that much of difference in power on a street tuned car, although you might notice better throttle response
my .02</TD></TR></TABLE>

I'm almost positive gsr is 60mm and ITR is 62mm

VTC_CiViC

All B-series are 60mm, ITR is 62mm. I *think* I heard the 90-91 LS used a 57mm TB but i'm not sure about that.

raene

JDM 1st-gen B16 is 58mm, I believe the Integra LS is the same (they share gaskets anyway).

Mr. Softee

94+ gsr/ls tbs are same size

MADEINIRAQ

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raene &raquo;</TD></TR><TR><TD CLASS="quote">JDM 1st-gen B16 is 58mm, I believe the Integra LS is the same (they share gaskets anyway). </TD></TR></TABLE>
yes.. all obd-0 58mm


obd-1/2 b16 / gsr 60mm

type r 62

Couto

Well you have a lot of various reponse on that.

So my opinion is.... If you bore the TB you would have more air comes but you must make a tuning on that because you would have a little bit of air so .... You need more gas so.... tuning I think that you have about 10-15 hp more with alot of tuning

COUTO

Charlie Moua

iTrader: (3)

thanks guys.

so since 64mm vs 60mm is about 13-14% bigger would that nessaryly mean more power with FI applications?

take for example 6psi stock B18c1 with any turbo kit.
changing TB would it be benifitial?

raene

I doubt it. I think it would also increase lag a bit by increasing volume in the manifold. And then there's the hassle of match porting it...

Unless the TB is smaller than both the piping and the intake manifold's inlet, I wouldn't bother.

Joseph Davis

The restriction in the intake tract is not the TB. It's the intake valves.

SiRkid

whats wrong with them?

Charlie Moua

iTrader: (3)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raene &raquo;</TD></TR><TR><TD CLASS="quote">I doubt it. I think it would also increase lag a bit by increasing volume in the manifold. And then there's the hassle of match porting it...

Unless the TB is smaller than both the piping and the intake manifold's inlet, I wouldn't bother. </TD></TR></TABLE>

the skunk2 IM has a inlet of 64mm into the peuletume (sp) so i would not have to port match it because I would have a 64mm tb.

in this case the TB will be 64mm as well at the intake manifold inlet.
THe turbo piping will be about 2.50ish i think.


what should i do? what would you do?

AlphaKennyWun

For your hp levels its probably not worth it. Change the intake manifold first where you will get the best gains. But If you plan to go higher hp levels then keep in mind what other air restrictions you have. For example, Intercooler piping is 2.5 inches which is at 63.5 mm diameter. No matter how you look at it, the stock 60 mm gsr tb is a bottle neck.

How much of a bottle neck really is determined what the output of your engine is. For me at 300 hp it is causing a noticeable bottle neck (For you it might not). Additionally my stock intake manifold, 2.5 downpipe and 2.25 exhaust is all from when I had 6 psi. When I change those out and get oversized valves with a slight port on the head i should obtain another 50-60 hp at same boost level.

raene

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by S03Burner &raquo;</TD></TR><TR><TD CLASS="quote">For your hp levels its probably not worth it. Change the intake manifold first where you will get the best gains. But If you plan to go higher hp levels then keep in mind what other air restrictions you have. For example, Intercooler piping is 2.5 inches which is at 63.5 mm diameter. No matter how you look at it, the stock 60 mm gsr tb is a bottle neck.</TD></TR></TABLE>

The man is right... I was assuming 2" piping. If you have 2.5" and his calculations for imperial to metric are correct then yes, it's a bottleneck.

Charlie Moua

iTrader: (3)

I belive my custome piping will be 2.5
my turbo is quick spool that pulls nicely to redline nothing like a BIG whp hump like a t3t4 would cause.
I only plan on making 280whp max for this daily driven setup.

Charlie Moua

iTrader: (3)

I belive my custome piping will be 2.50 all the way around. If it was 2.0 would that be too small?

My turbo on my gsr is going to have very quick spool up and will pull nicely all the way to redline. No big hump of power when you reach full boost like a t3t4 or larger would cause on the powerband. it will be smooth and gradual.

I only plan to make 250whp low boost 280-300whp race boost.
should i invest $150 into my TB or better save money towards PP head, sleeving bigger items like that?

AlphaKennyWun

of all the things you could do, i would leave the tb for last....

shermanyang

iTrader: (1)

hey Charlie...it's not worth it. trust me. worry about that stuff later. if you really want power then get a larger DP, cat, Exhaust. increasing the diameter of the intake side with what you've got and the boost level your at will only increase your lag and and lower your psi. also get 2 1/4 intercooler piping for your setup...i know what you have and what you want, and 2 1/4 will be perfect for you and allow you some room to expand. this will be perfect for the size turbo you're gonna run cause even i run this on my t3/t04e. we'll talk later though bro...maybe this weekend cause i don't have much to do this weekend.

danimal

sizing the throttle body on a boosted motor is a function of the airspeed thru the throttle body... it's pretty easily calculated, per the corky carroll book... the limitation is ~300 ft/sec to keep losses to a minimum... but that probably won't apply in quite the same way when there isn't a throttle plate involved, i.e., when looking at the intake manifold internal diameter, because there will be less turbulence.

you can use this online calculator: http://not2fast.wryday.com/gasflow/velocity.shtml

you'll need the total cfm of your engine first, which can be easily done at several internet calculators:
http://www.smokemup.com/auto_math/index.php
http://not2fast.wryday.com/tur...shtml