should I go with a 2.5 downpipe or 3inch on a stock d16y7 with a t3 garret/airesearch 42/48 60 trim? I don't have A/C so space wouldn't be a problem. I did read about some lag spikes.. I'm looking to boost 9/10 lbs on a stock motor with hopefully around 200whp. Real close to buying the bmc LOG mani/3inch downpipe... Pls give me some feedback.

 

do the 3", it will let the turbo breathe better so spool up is a little quicker. also, what size exhaust are you runin? some people like to run same size all the way through. up to you but im runnin a 3" and love it. open downpipe growl *such a sexy sound*

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by moomakudafi &raquo;</TD></TR><TR><TD CLASS="quote">do the 3", it will let the turbo breathe better so spool up is a little quicker. also, what size exhaust are you runin? some people like to run same size all the way through. up to you but im runnin a 3" and love it. open downpipe growl *such a sexy sound*</TD></TR></TABLE>

great.. so it's not an overkill on a stock d16y7 with a t3 60 trim turbo right? I just don't want to go over board with it and have problems (spike or lose power).. I will be running a 3 inch exhaust as well so 3 inch piping all the way.


Modified by BigMoneyP at 8:13 PM 4/3/2005

 

i dont think that little d is going to sppol up that t4.

I would get the 3" DP though.

 

my car just was finished today
first state was awesome enough to fabricate a 3 inch downpipe and KEEP a/c in there!!!
its on my d16y8

 

definately go with the 3" all the way

 

if you can fit 3", then go with 3"

 

the 3 inch should clear Power steering on my hatch right? I don't have A/c.. it's for a 99 dx hatch non a/c.. how much more power would it make over a 2.5 DP?

 

power is not what you will gain but it will let the turbo breathe better. the faster you can get the air in and out of the motor, the better. the 3" will be your best bet

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turboaddict &raquo;</TD></TR><TR><TD CLASS="quote">definately go with the 3" all the way</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92civicb18b1 &raquo;</TD></TR><TR><TD CLASS="quote">i dont think that little d is going to sppol up that t4.

I would get the 3" DP though.</TD></TR></TABLE>

sorry I meant t3.. looks like ill be purchasing the bmc log mani/ 3 inch downpipe combo!

 

Port out the internal WG hole a few mm too. It will help you control boost better and doesnt really cost anything to do if you have the tools.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">Port out the internal WG hole a few mm too. It will help you control boost better and doesnt really cost anything to do if you have the tools.</TD></TR></TABLE>

not quite sure what you mean by this. i'm planning on getting a tial wastegate.. perhaps a 38mm one. where would this internal WG hole be located?

 

nevermind then, you will be blocking off the internal WG hole with your DP flange. The 38mm Tial will flow just fine

 

i do think 38 would be good enough, what size would you guys recommend on this 3 inch DP

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BigMoneyP &raquo;</TD></TR><TR><TD CLASS="quote">i do think 38 would be good enough, what size would you guys recommend on this 3 inch DP</TD></TR></TABLE>

Your 38mm should be fine...I'm controling boost perfectly (no spikes and no creep) on my 60 trim T3 using a TiAl 35mm, using a custom made tubular manifold, similar to this...

http://www.alienauto.com Thanks again Justin!!!


Manifold design plays a big part in how well the WG is able to control boost though, my SSAC pos with the same WG spiked like a bitch (like 4 psi) and crept about 2 psi.

 

what a great looking manifold.

 

does the HF manifold allow you to keep your A/C with a 2.5 downpipe?

 

HF mani's are not a/c friendly.

 

your kidding me dang it i want my a/c

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92civicb18b1 &raquo;</TD></TR><TR><TD CLASS="quote">i dont think that little d is going to sppol up that t4.
</TD></TR></TABLE>

You think wrong. My y7 w/ a t4 hits full boost(8psi)at 4500 and pulls all the way to red. There is a little lag but that just gives you time to tighten you'r seatbelt.

 

Comon man, this is honda tech. 3" is way to small. You're gonna need at least a 4-5" 'er.

/sarcasm

 

I plan on running 2.5inch turbo back with no cat and one magnaflow bullet straight through muffler. Personally I think 3" is a little overbored for a sohc but are we bolting turbo's to our honda's to not go overbored? I don't think so. If you can afford 3" go for it man!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by doubleA &raquo;</TD></TR><TR><TD CLASS="quote">I plan on running 2.5inch turbo back with no cat and one magnaflow bullet straight through muffler. Personally I think 3" is a little overbored for a sohc but are we bolting turbo's to our honda's to not go overbored? I don't think so. If you can afford 3" go for it man!</TD></TR></TABLE>
I've heard this setup before. Be prepard to get earplugs. It is really raspy loud.

 

3 inch DP on my SOHC.... if you can fit it go with the 3 inch.