what are the a/r's on the stock turboII turbo?
05-20-03, 07:28 AM
#1
what are the a/r's on the stock turboII turbo?
i was always under the impression that the stock turboII HT18 was unbalanced and had a big hotside and a small compressor side.
what are the a/r's for the turbine and compressor for the stock turbo?
for some reason i always thought the stock hotside had like a .80 a/r and the compressor had like a .50 or so. i have been wondering about this for a while so someone help me out.
what are the a/r's for the turbine and compressor for the stock turbo?
for some reason i always thought the stock hotside had like a .80 a/r and the compressor had like a .50 or so. i have been wondering about this for a while so someone help me out.
05-20-03, 09:01 AM
#2
Must...scrub...parts...
I'd email Brian at bnrsupercars if no one can give you a good enought anwser. I don't know the numbers, but I'm guessing you're right, which would be why his hybrids are supposed to work so well, but my memory of thermodynamics is fading, so I might not know what I'm talking about.
*think!!!*
05-22-03, 02:22 AM
#7
no way, it would have to be the compressor size. the compressor side on that turbo is tiny compared to the hotside. people always complain about the turbine side holding them back when they strap a massive t04 compressor onto the stock hotside.
josepi: i thought s4 and s5 turbos were the same except for the wastegate stuff?
josepi: i thought s4 and s5 turbos were the same except for the wastegate stuff?
Last edited by jacobcartmill; 05-22-03 at 02:25 AM.
Trending Topics
05-22-03, 02:33 AM
#8
Super Newbie
I read a thing saying that the combined A/R of the S4 housing was 1.0 with the twin scroll open, and it was .8 with it closed so it spools faster.
So I'd imagine they are both 1.0, but it's still sorta small for a rotary engine. A/R is only part of the equation.
So I'd imagine they are both 1.0, but it's still sorta small for a rotary engine. A/R is only part of the equation.
05-22-03, 03:03 PM
#9
...
Join Date: Aug 2001
Location: Tampa, FL
Posts: 7,539
Likes: 0
Received 0 Likes
on
0 Posts
All I know is when I hot the stock turbo I asked why it didn't hold boost too well in the high RPMs and people said that its because of the hotside of the turbo. But really I don't know.
05-22-03, 08:24 PM
#10
SOLD THE RX-7!
Join Date: Mar 2001
Location: Vancouver, BC, Canada
Posts: 7,451
Likes: 0
Received 0 Likes
on
0 Posts
A/R doesn't really mean anything...
I think the stock turbo is .86 which makes what 250hp..
and you could get a TO4 with a .86 ar and make over 400. and it would be alot bigger.
A/R number is just a ratio. so you make both things bigger. and the A/R stays the same. but the turbo is biger.
I think the stock turbo is .86 which makes what 250hp..
and you could get a TO4 with a .86 ar and make over 400. and it would be alot bigger.
A/R number is just a ratio. so you make both things bigger. and the A/R stays the same. but the turbo is biger.
