Fuel required: hybrd vs stock (myth or reality?)
#1
Drive.
Thread Starter
Join Date: Oct 2002
Location: Washington, North Carolina
Posts: 1,676
Likes: 0
Received 1 Like
on
1 Post
Fuel required: hybrd vs stock (myth or reality?)
Hey, I'm trying to clear up some information. I've heard both true and false, so I don't know which is right. Does "X" amount of boost on a stock s5 turbo require the same amount of fuel as a larger hybrid (say a bnr stage 3 or 4) @ the same boost level? Essentially, does 10psi of boost on a hybrid require more fuel than 10psi on a stock turbo? If it does require more fuel....why? As I've said, I've heard both yes and no...so which is right?
#2
Lives on the Forum
Boost does not necessarily mean more power.
That's a general rule.
But, since we're talking about almost identical set-up's with the exception of the compression section...yes, the hybrid should make more power at the same amount of boost.
-Ted
That's a general rule.
But, since we're talking about almost identical set-up's with the exception of the compression section...yes, the hybrid should make more power at the same amount of boost.
-Ted
#3
Drive.
Thread Starter
Join Date: Oct 2002
Location: Washington, North Carolina
Posts: 1,676
Likes: 0
Received 1 Like
on
1 Post
but is it using the same amount of fuel or does it require more?
let me try wording a different way....assuming I'm running an s5 turbo @ 10lbs and I'm getting afr's @ 11.5 @ 6000rpm....then I change only the turbo out to a large hybrid and run it at 10 lbs...would my afr's be any leaner? Would I need to add more fuel even tho I'm still running the same amount of boost?
let me try wording a different way....assuming I'm running an s5 turbo @ 10lbs and I'm getting afr's @ 11.5 @ 6000rpm....then I change only the turbo out to a large hybrid and run it at 10 lbs...would my afr's be any leaner? Would I need to add more fuel even tho I'm still running the same amount of boost?
#7
Rotorhead
Join Date: Feb 2001
Location: Charlottesville, Virginia, USA
Posts: 9,136
Likes: 0
Received 39 Likes
on
33 Posts
It's more about density and efficiency. In this situation, pressure is a constant as stated by the original poster.
Trending Topics
#8
Boost in..Apex seals out.
Join Date: Nov 2003
Location: Maryland, 21794
Posts: 1,931
Likes: 0
Received 0 Likes
on
0 Posts
That is assuming the turbo with the larger compressor increases the volumetric efficiency and/or decreases the air temperature vs. the smaller turbo. While this is usually the case, I just want to point out that sometimes it doesn't work out this way, so the answer to the poster's question is not an absolute.
Well, no, the answer to this particular poster's question IS an absolute. The BNR stage 1-4 turbos will increase volumetric efficiency, because it WILL flow more CFM at a static boost level than the stock turbo.
So yes, it WILL need more fuel =O
#9
destroy, rebuild, repeat
iTrader: (1)
meaning, if the exhasut side was the same, and boost pressure fixed, a bigger compressor will flow the same or less, due to the higher drag of the bigger compressor
however most hybrids have clipped or modified exhaust sides, which lowers backpressure, which causes more airflow (power) at a given boost pressure
#12
Crash Auto?Fix Auto.
iTrader: (3)
Hey, I'm trying to clear up some information. I've heard both true and false, so I don't know which is right. Does "X" amount of boost on a stock s5 turbo require the same amount of fuel as a larger hybrid (say a bnr stage 3 or 4) @ the same boost level? Essentially, does 10psi of boost on a hybrid require more fuel than 10psi on a stock turbo? If it does require more fuel....why? As I've said, I've heard both yes and no...so which is right?
The hybrid turbo (should, and for this example lets say will) make more hosrepower. To make more power then before you need two things. More air. And more fuel. The two together equal a more explosive combustion, which results in more work performed on the eccentric shaft, which means more smiles on your face.
Kapeesh?
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM