R33 Dump Pipe Installed - Now Boost Holding Back

[mad082]

1. I have been told I can run 1 bar before I will get “boost cut”, is that OK?

2. My mate runs 12 psi and doesn’t get “boost cut” and I run 11 psi and get “boost cut”, why ?

3. Something is wrong with my engine I get “boost cut” at 10 psi ?

4. GTR’s don’t get "boost cut" until 1.1 bar, so why do GTST’s get "boost cut" at 11 psi ?

so instead of all those you will have the same questions, but with 'rich and retard mode' instead of 'boost cut'. no matter what term you use people will still keep asking the questions.

[mad082]

The problem is when someone is told it is a “boost cut” problem the first thing they think is there is some hard and fast boost limit that they can’t exceed

it is a limit that they can't exceed. on that particular car, whatever boost they are at when the r&r mode kicks in, that is the limit as to what they can run. sure they could run a higher boost, but it will cut out earlier. there is no way they can get around it without a fuel cut defender or an ecu upgrade.

also a lot of you make it sound like it just gets sluggish when it happens. it is a harsh stop in power. it is literally as if someone has turned the key off, then immediately turns it back on, and in my case results in wheelspin in the lower gears if i don't lift of the gas quick enough. then it keeps pulling up through the rev range about as hard as usual.

[TTT]

Hey Everyone,

Thanks for your help. So I guess it's a re-map for my friend. Much appreciated

R33’s can’t get REMAPS (easily)

and

is it a sudden stop start, or a flat spot where acceleration slows for a bit. if it is a sudden cut out then it is 'boost cut'. if it is just a slow spot then it could be the cams changing over. there is a thread on it somewhere on here, and how you can change when it does it slightly with an aftermarket ecu.

Maybe you missed it..

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

There is no such thing as boost cut

[mad082]

Maybe you missed it

maybe you missed my inverted commas. also refering to it as boost cut isn't really any different to giving someone a nick name. if someones name is james and i call them jimmy, i'm not calling him the right name, but everyone would still know who i'm talking about.

[R31Nismoid]

not if there are a dozen other people in a room that dont know each other

thats the problem here, people dont KNOW what the problem is and are looking for a plain english answer

[Sydneykid]

it is a limit that they can't exceed. on that particular car, whatever boost they are at when the r&r mode kicks in, that is the limit as to what they can run. sure they could run a higher boost, but it will cut out earlier. there is no way they can get around it without a fuel cut defender or an ecu upgrade.

That’s exactly the problem, think about this question;

I had the standard turbo at 10 psi with no “boost cut”, why do I get “boost cut” at 10 psi with my new (larger) turbo?

Well that’ because it’s not boost that is the problem, it is excessive airflow. The new (larger) turbo flows more air at 10 psi than the standard turbo. The only fix is an AFM voltage bender, rechip (if possible) or aftermarket ECU.

But everyone told me it was “boost cut”, so I spent all my money buying a new turbo to I could make more power at the same boost and not get “boost cut”. I don’t have any money left to buy an ECU…………..

Do a search I will bet you find 50 posts with exactly that problem of misunderstanding. Which is simply avoided by using the correct terminology.

cheers