fp red vs Gt30
A turbo does not ram air into an engine. The engine still relies on mechanical tuning to suck air into the cylinders. All the turbo does is increase air density inside the manifold, nothing else.
Larger turbo cars generally do well on fuel economy because the ECU isn't kicked into open loop everytime the driver applies mild pressure to the go-pedal.
And now to comment on the OP:
IF one is going to go through the trouble and expense of purchasing and installing a large turbo kit, there is no reason whatsover to consider anything smaller than a GT35R or variant thereof
Why?
Because there isn't anything smaller than a GT35R that does anything that an FP Red doesn't do better, and with less money and hassle invested.
Larger turbo cars generally do well on fuel economy because the ECU isn't kicked into open loop everytime the driver applies mild pressure to the go-pedal.
And now to comment on the OP:
IF one is going to go through the trouble and expense of purchasing and installing a large turbo kit, there is no reason whatsover to consider anything smaller than a GT35R or variant thereof
Why?
Because there isn't anything smaller than a GT35R that does anything that an FP Red doesn't do better, and with less money and hassle invested.
Newbie
Joined: Feb 2009
Posts: 6
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From: Suffolk County NY
Trust me im very aware of how things work... But your still saying i am incorrect! thats what i do not understand... If you dont force more air into the cylinder (boost) then you dont dump fuel, if you dont dump fuel, and your not making boost and just crusing at highway speeds then your gas mialage is better then stock turbo being at 3500 rpm in 5th already on boost... So like i said before your not making any scence... what i stated was not making more power it was fuel econemy with a big turbo, everyone here is aware on what happens when your turbo gets swapped out for a bigger one...
A turbo does not ram air into an engine. The engine still relies on mechanical tuning to suck air into the cylinders. All the turbo does is increase air density inside the manifold, nothing else.
Larger turbo cars generally do well on fuel economy because the ECU isn't kicked into open loop everytime the driver applies mild pressure to the go-pedal.
And now to comment on the OP:
IF one is going to go through the trouble and expense of purchasing and installing a large turbo kit, there is no reason whatsover to consider anything smaller than a GT35R or variant thereof
Why?
Because there isn't anything smaller than a GT35R that does anything that an FP Red doesn't do better, and with less money and hassle invested.
Larger turbo cars generally do well on fuel economy because the ECU isn't kicked into open loop everytime the driver applies mild pressure to the go-pedal.
And now to comment on the OP:
IF one is going to go through the trouble and expense of purchasing and installing a large turbo kit, there is no reason whatsover to consider anything smaller than a GT35R or variant thereof
Why?
Because there isn't anything smaller than a GT35R that does anything that an FP Red doesn't do better, and with less money and hassle invested.
Op, I apologize if i drifted off topic.
Ted, I tend to disagree with u , the turbo is essentialy a compressor, that compresses air into ur valve opening, so u could have the valve opening stay constant but by varying ur flow rate, more air can be rammed into the cylinders. and the density of the air is not a function of the turbo, its a function of temperature. my 0.02!
Trust me im very aware of how things work... But your still saying i am incorrect! thats what i do not understand... If you dont force more air into the cylinder (boost) then you dont dump fuel, if you dont dump fuel, and your not making boost and just crusing at highway speeds then your gas mialage is better then stock turbo being at 3500 rpm in 5th already on boost... So like i said before your not making any scence... what i stated was not making more power it was fuel econemy with a big turbo, everyone here is aware on what happens when your turbo gets swapped out for a bigger one...
You're free to disagree, but I'm giving you facts, not opinions.
No, because there is pressure on the exhaust side that is trying to force its way back in. Oftentimes that pressure is greater than the intake pressure. The fault in your understanding is that you are assuming the pressure on the exhaust side is remaining constant, and that is absolutely untrue. The exhaust pressure rises in proportion to the intake pressure.
That is incorrect. Temperature only influences density. It does not dictate it.
That is incorrect. Temperature only influences density. It does not dictate it.
The problem with a small, twitchy turbo is that going into boost kicks the load upward, which causes the ECU to switch into open loop. With a larger turbo, it takes a larger, more deliberate pedal movement to get the turbo moving and kick the ECU into open loop.
Op, I apologize if i drifted off topic.
Ted, I tend to disagree with u , the turbo is essentialy a compressor, that compresses air into ur valve opening, so u could have the valve opening stay constant but by varying ur flow rate, more air can be rammed into the cylinders. and the density of the air is not a function of the turbo, its a function of temperature. my 0.02!
Ted, I tend to disagree with u , the turbo is essentialy a compressor, that compresses air into ur valve opening, so u could have the valve opening stay constant but by varying ur flow rate, more air can be rammed into the cylinders. and the density of the air is not a function of the turbo, its a function of temperature. my 0.02!
n/V=P/RT
That's quite not the correct way to view it. Anytime the ECU is kicked into open loop, fuel economy suffers. The factory ECU has a table in it that uses rpm vs. load to determine when the ECU switches from closed loop (economy mode) to open loop (performance mode).
The problem with a small, twitchy turbo is that going into boost kicks the load upward, which causes the ECU to switch into open loop. With a larger turbo, it takes a larger, more deliberate pedal movement to get the turbo moving and kick the ECU into open loop.
The problem with a small, twitchy turbo is that going into boost kicks the load upward, which causes the ECU to switch into open loop. With a larger turbo, it takes a larger, more deliberate pedal movement to get the turbo moving and kick the ECU into open loop.
Newbie
Joined: Feb 2009
Posts: 2
Likes: 0
From: Stoke, UK
FPRed, GT3076R & HTA86
Hey
No doubt the red's turning out to be a weapon of a turbo
, compares well with the GT3076R and (in my opinion) the FP HTA86 
http://www.torquecurve.com/comparison/1034673035
(Graphs may be a mix of UK & US results, email me if you've got something similar and I'll upload!)
Kind Regards
Pete W
No doubt the red's turning out to be a weapon of a turbo
, compares well with the GT3076R and (in my opinion) the FP HTA86 http://www.torquecurve.com/comparison/1034673035
(Graphs may be a mix of UK & US results, email me if you've got something similar and I'll upload!)
Kind Regards
Pete W
so pressure does influences the density but that's because its effect on the rise of temperature.
Newbie
Joined: Feb 2009
Posts: 2
Likes: 0
From: Stoke, UK
Slight correction
Pressure is the macroscopic net effect of molecular momentum change, i.e. molecules bouncing off stuff.
The decrease in density for hot gasses is actually because hot gasses will balance pressure with less gas in a given volume.
The decrease in density for hot gasses is actually because hot gasses will balance pressure with less gas in a given volume.
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David Buschur
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Oct 16, 2006 09:30 AM
