peakaboost

whats up guys,

I have a divided .85a/r turbine housing,and im using an undivided ramhorn mani. Will using a divided housing and an undivided mani cause problems? As in hamper my spool,or effect top end power?

PT66Y922Rx83

There is an obvious obstruction that will cause some turbulence which has some negative effect, but you probably will not notice and/or will not be able to document it.

Don't worry about it.

boostismycrack

FWIW I made 600hp on a .78 divided gt35r and an undivided ramhorn...

HiProfile

Its really a question of WHY, since there are so few downsides to a divided setup. Less interference during exhaust pulses, mix between faster spoolup & more power (same or larger AR). Its mainly an issue with manifold design. Its not as easy to design on a inline-4 than say a inline-6.

TheShodan

iTrader: (14)

The reason is that he wanted to use a .85A/R BW turbine housing for his application, when his best option is actually the .70A/R T3 undivided V-band

peakaboost

why is the smaller housing a better option?

boostismycrack

An undivided .70 a/r will outflow a divided .85 a/r is my guess. I bought atp's .78 divided t3 housing for its compact size and figured it wasn't much smaller than the .82. Tony told me that it would probably flow less than the .63. It ran out of breath right at 600hp.

hondab1015

^ Whats up with the numbers in your sig? Id like to see a honda run a 10.7 @114mph.

tony413

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondab1015 &raquo;</TD></TR><TR><TD CLASS="quote">^ Whats up with the numbers in your sig? Id like to see a honda run a 10.7 @114mph.</TD></TR></TABLE>

haha 31inch slicks and 4.9:1 final drive FTW

JDMs1eeper

i had a .84 a/r turbine, divided. on a InlinePRO T4 mani. non divide.

Ran fine, made 370 @ 10psi on a 2.0 lsvtec. and was full boost at 5k.

Soooo seemed to of been just fine.

boostismycrack

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondab1015 &raquo;</TD></TR><TR><TD CLASS="quote">^ Whats up with the numbers in your sig? Id like to see a honda run a 10.7 @114mph.</TD></TR></TABLE>

Uhhhh, you wana see the slip? Thats what happens when you cut a good 60' a good 330' a good 1/8th and your **** breaks before the 1/4...

tony413

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

Uhhhh, you wana see the slip? Thats what happens when you cut a good 60' a good 330' a good 1/8th and your **** breaks before the 1/4...</TD></TR></TABLE>

i would like to see a slip.

how much does the car weight ? and whats the gearing and size slicks ?

TheShodan

iTrader: (14)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by peakaboost &raquo;</TD></TR><TR><TD CLASS="quote">why is the smaller housing a better option?</TD></TR></TABLE>

You're looking at a RAW number, not the math behind it. The .70A/R can support a larger exhaust wheel due to its wider volute than most Garretts in the .82A/R size. A wider turbine housing and larger volute is what changes the number. It's really not small.

tony1

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony413 &raquo;</TD></TR><TR><TD CLASS="quote">

i would like to see a slip.

how much does the car weight ? and whats the gearing and size slicks ? </TD></TR></TABLE>

It's a normal street car with a/c and full interior, my guess is 2550 or so. GSR trans and 24.5" slicks. I built and tuned the car, i was there, hit the boost cut in 4th gear.

I've run 10.0 at 102mph, when you let off early it has a huge affect on MPH but not as much on ET.

mrbsponge

I had the Bullseye .85 AR divided housing on a fullrace UNdivided manifold, made a hair over 700 with it, and ran a 10.02, do i think there was any issues with it, not a chance in hell.

could i have picked up a little in the midrange, im sure. but i wasnt worried about it. the 366 spooled damn near identical to my 35R, so i was happy.

tony413

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">

It's a normal street car with a/c and full interior, my guess is 2550 or so. GSR trans and 24.5" slicks. I built and tuned the car, i was there, hit the boost cut in 4th gear.

I've run 10.0 at 102mph, when you let off early it has a huge affect on MPH but not as much on ET.</TD></TR></TABLE>

wow never seen it happen before but il take your word for it, would you have been in the 9's without letting off ?

hondab1015

Yeah Id like to see that slip.

boostismycrack

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondab1015 &raquo;</TD></TR><TR><TD CLASS="quote">Yeah Id like to see that slip. </TD></TR></TABLE>

^^^Are you serious? It was a bad run, the car didn't make a full pass. Do you not comprehend?

hondab1015

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

^^^Are you serious? It was a bad run, the car didn't make a full pass. Do you not comprehend?</TD></TR></TABLE>

Why offer if your not going to come through?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by boostismycrack &raquo;</TD></TR><TR><TD CLASS="quote">
Uhhhh, you wana see the slip? Thats what happens when you cut a good 60' a good 330' a good 1/8th and your **** breaks before the 1/4...
</TD></TR></TABLE>

So once again, YES I WANT TO SEE THE SLIP! Now WTF dont YOU comprehend?

boostismycrack

I am not at home and most likely the slip will be wiped out by a hurricane, but doesn't change the fact that a car will lose mph when you let out. I'm sorry you don't get it. When I get back home I will go to the track and let out early and make u another slip. Maybe then you will understand, but i doubt it...

boostismycrack

^^Alright scratch that, I just went thruogh my stuff here and actually happen to have the slip. Times are:

60' 1.653
330' 4.625
1/8th 6.933@109
1/4th 10.786@114.08

The hotel room doesn't have a scanner, but rest assured I will scan it when I get home.

boostismycrack

Hotel doesn't have a scanner, but i got my camera. Hope this fulfills your needs pal...

SovXietday

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondab1015 &raquo;</TD></TR><TR><TD CLASS="quote">^ Whats up with the numbers in your sig? Id like to see a honda run a 10.7 @114mph.</TD></TR></TABLE>

Uh, clearly you must be jesting? I've seen plenty of cars do that. If you're not accelerating through the line, whether you let off for testing purposes or something breaks, your trap speed is going to be much lower than normal because of the way trap speeds are calculated. Times won't be affected that much because at 100+ you're still covering a lot of ground very quickly, you're just not accelerating.

tony413

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SovXietday &raquo;</TD></TR><TR><TD CLASS="quote">
you're just not accelerating.</TD></TR></TABLE>

no he is still accelerating just in the opposite direction because he is slowing down

Blown90hatcH

Classic H-T haters FTL.

I wouldn't worry too much about the undiv/div combo. Its not ideal, but not going to create that much of a difference in what you are using.