um, its not like they have problems spooling in the first place. blocking off one half of the housing is going to cause hellacious backpressure in the manifold and youll lose a shitton of power

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rorik &raquo;</TD></TR><TR><TD CLASS="quote">****, I'm about to do that..this thread is getting so long, I can't even remember half of what I wrote before in it..

I'm trying to remember the a/r of the bullseye housing for the hx40..I think it was .68..I know I wrote that somewhere in here..</TD></TR></TABLE>
ya that sounds right in my memory...and the t3 one is like .55...dont hold me to that tho


blocking off one port would just create a whirlwind inside the turbine....obiviously not what you want...you best bet would be to use a divided flange ont he mani itself and use one side of it to blend in the exh gases...almost same concept as grinding down the center didvider except you'd be doin inside the mani therefore not increasing the turbines housing size....

basically think of it as a big wall....being the turbine wheel w/ 2 pipes...one on top & one on bottom...some exh goes in the top port...some goes in the bottom...pushing equally on the wall...now put this wall in a circular pattern and the exh gases on the inside & outside have different moments on the center creating a torque in the turbine wheel....now say you were to block off the upper pipe...ok so twice the pressure is now on the bottom...but it aspects its really not twice as strng because your slowing down the flow by the interuptions...so its really probably more like 1.5x the pressure....now say that hits the center most portion of the turbine wheel...so 1.5x at the center of the wheel isnt that much force...wheras even if the 1.5x force was applied equally over the wheel itll still be decentbecause its gettin a balced force across the area...farthest away from the rotating center point...

works almost on the same cocept as vgt turbos also know in some big holsets....but you best bet if its not spoolin fast enough is to just get a smaller housing....9cm, 12cm, 14cm...ooh there are so many....just remebering why i love holsets

 

I never advocated blocking off one of the inlet ports on the turbine housing..I already said I thought that would be half assed.. Can someone post a pic of the inside of the split housing when it isn't on the turbo? That should show exactly what would happen to the airflow if one half of the input was blocked off.

Random question: What size is the exhaust housing on most hx40s?

 

the smallest turbine will be 14cm they also have 16,17 but your best bet for the 35 and the 40's are the bullseye one. and people seem to forget these turbo were ment to run 25-35 plus psi evryday and saying that we can run the smaller housings and still make good power up top becacuse were not going to choke out. the 35 was ment to run on 5.8 truck and the 40 on 7-10 liters and nobody in honda is running theses big moters. these are high pressure turbos garret and the rest are just gettting to this level of performace holset if any one wants to run a holset they should run the 35 with the 12cm this is good good street setup for 3-500 whp with a hell of power band from 35-until redline. so if anyone is serious about saving money and getting gt35r or sc61 go
with 35/40 hybrid or the 40 with bulleye housing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hulk22 &raquo;</TD></TR><TR><TD CLASS="quote">the smallest turbine will be 14cm they also have 16,17 but your best bet for the 35 and the 40's are the bullseye one. and people seem to forget these turbo were ment to run 25-35 plus psi evryday and saying that we can run the smaller housings and still make good power up top becacuse were not going to choke out. the 35 was ment to run on 5.8 truck and the 40 on 7-10 liters and nobody in honda is running theses big moters. these are high pressure turbos garret and the rest are just gettting to this level of performace holset if any one wants to run a holset they should run the 35 with the 12cm this is good good street setup for 3-500 whp with a hell of power band from 35-until redline. so if anyone is serious about saving money and getting gt35r or sc61 go
with 35/40 hybrid or the 40 with bulleye housing.</TD></TR></TABLE>
So ebay is my best friend, what would one be searching for holest 35? These turbo come internally wastgted right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hulk22 &raquo;</TD></TR><TR><TD CLASS="quote">the smallest turbine will be 14cm they also have 16,17 but your best bet for the 35 and the 40's are the bullseye one. </TD></TR></TABLE>
true the 14cm is the smallest 40 turbne housing...but it can be put together w/ the hx35 turbine housing and get a 9cm or 12cm housing...not that you'd really want to because im sure it be close to surging...

but def good stuff

 

I check back on this thread every now and then to see if drumking15 posted pics or a dyno yet... Im still waiting

 

****, ive got the pics. i need to host them, lol

 

Thanks for all the info about blocking off one side.
I was going to try this because I was told it would help spool faster.
But I probably wouldnt have done it because its a hassle in the 1st place.

If it isnt full spooled when I shift each gear ill just throw on a small shot. 35 or 50.

Thanks for all the replies.

Hell I dont think I need 300 whp to run 11.99 anyway.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wantboost &raquo;</TD></TR><TR><TD CLASS="quote">****, ive got the pics. i need to host them, lol</TD></TR></TABLE>

hahaha ya ive been lazy too....hopefully ill catch up w/ bailhatch in the next coming weeks and get some roller numbas...

 

adam's a good guy, he built my first turbo mani

 

Well, I want the hx40 compressor (or one of them to be exact..I have 3 different maps and have no idea how to tell wtf is what by application) but I don't know what to do about the exhaust side. I remember when I emailed bullseye abou the housing, I think the T4 one is still too small to carry the torque as high as I want it for my power goals..I don't know though. I think if it is .68 a/r, that is too small. So if the smallest factory hx40 turbine housing is a 14cm, what a/r is that equivalent to? What size would be like .8 a/r?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drumking15 &raquo;</TD></TR><TR><TD CLASS="quote">
true the 14cm is the smallest 40 turbne housing...but it can be put together w/ the hx35 turbine housing and get a 9cm or 12cm housing...not that you'd really want to because im sure it be close to surging...

but def good stuff </TD></TR></TABLE>

I currently have the 40 comp wheel in the 12cm housing, what would be the disadvantages/advantages of switching to the 9cm housing, I know one of my friends had good luck with this setup, it spooled super quick, but would there be any disadvantages? I'm running a 1.8L vtec motor with a bottom end build.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 9hatchman4 &raquo;</TD></TR><TR><TD CLASS="quote">I currently have the 40 comp wheel in the 12cm housing, what would be the disadvantages/advantages of switching to the 9cm housing, I know one of my friends had good luck with this setup, it spooled super quick, but would there be any disadvantages? I'm running a 1.8L vtec motor with a bottom end build.</TD></TR></TABLE>
if thats the case id see no reason to get a 9cm housing...for gods sake i spool my hx35 12cm at 4200rpm...only thing it be doin is chokin down the benfit of your hx40 compressor...any numbers on your setup...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rorik &raquo;</TD></TR><TR><TD CLASS="quote">Well, I want the hx40 compressor (or one of them to be exact..I have 3 different maps and have no idea how to tell wtf is what by application) but I don't know what to do about the exhaust side. I remember when I emailed bullseye abou the housing, I think the T4 one is still too small to carry the torque as high as I want it for my power goals..I don't know though. I think if it is .68 a/r, that is too small. So if the smallest factory hx40 turbine housing is a 14cm, what a/r is that equivalent to? What size would be like .8 a/r?</TD></TR></TABLE>

looks between pgs 1-5...i read in there somewhere by blundar a comparison between a/r's and cm sizes

 

kinda ot but is anyone selling a hx/hy35 or h1c? don't tell me ebay cause i've looked and everyone wants a boat load or theirs hella time left in the auctions!

 

maybe search some dodge or cumins forums. and i know you dont want to here it but keep your eye on ebay, sometimes a good deal pops up. and thats were i have see the best deals.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drumking15 &raquo;</TD></TR><TR><TD CLASS="quote">

looks between pgs 1-5...i read in there somewhere by blundar a comparison between a/r's and cm sizes </TD></TR></TABLE>
Yeah, I just looked through there again, and he wrote that the 12cm is about .63, and the 16 is about .82. I looked up my email from bullseyepower and he said the mitsubishi housing a/r is .55 and the t3 one is .63. I don't know if there is a t4 housing for the hx40, I have no info on that, I don't remember where I got what I wrote a few posts ago about the .68 t4..it's probably totally wrong though.

2 different turbos, same a/r, different spool though.. you might be able to spool an hx35 with a 16cm housing, but how would an hx40 spool with that same .82 a/r? I guess that is what I want, for power and the ability to carry the torque high up into the rev range, like say 9krpm or so..?

 

i remember seeing a holset with a t4 flanged housing, but they are hard to come across. most larger holsets are t6 flanged

 

And what does that hx40 with the 16cm housing come off of?? What kind of truck or whatever..a volvo semi?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rorik &raquo;</TD></TR><TR><TD CLASS="quote">And what does that hx40 with the 16cm housing come off of?? What kind of truck or whatever..a volvo semi?</TD></TR></TABLE>
no clue but in pgs 1-5 you find a link to a site that sells them...heh i guess this is a reason why i need to make a huge directory...

and the 16cm is gonna be very laggy...9k isnt much farther than im stretch my setup at 8200 and it rips to redline....id be hard pressed to say torque is dropping off...but w/ a dyno sheet im useless...hopefully firin her up today and have her on the rollers in a week or two

 

yes most are. but there are some non wastegated ones floating around. but you can order one from a deisel shop. you could buy 3 used 35's and not pay as much for the gt35r. and bullseye makess a t4 houseing for the 35,40. if anyone has any dout check the dsm site there mad info on them using these holset

 

yes 16cm maybe alittle laggy pending on setup!? ive have seen anyone run that size or bigger on a 4 bagger, but people are lazzy and will use with they get. i should have some dyno number in 2-3 weeks im running the 40 with the bullseye housing in t3. im giong to finish the car after the 4th july. and for those who have comp. maps you will
see they run best between 25-30 psi they run in the 75-79% is the sweet spot. so running under 15psi is just plane wrong! the watse gate on these turbo are set set at 22-25 stock. that being said, this shoul tell you what kind of monsters these turbo can be. im running built h22 9.5comp. so im running 15-20 on low boost setting for pump gas and 25-35psi race but we have 100 oct. for pump gas in north carolina so i will be getting tune on that after car is car is running.

 

H1C with V band style exhaust just arrived in the mail.

Im beyond excited.


Modified by Dr. D-Series at 12:17 AM 7/3/2006

 

i don't know if this has been covered or not, but will a hx30 or 35 fit on a drag mani and still keep A/C and P/S? From what ive read, these turbo seem to be pretty decent.