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Old 31-03-2009   #1
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Turbo lag?

hi guys,
just wondering whether what i'm experiencing is 'Turbo lag'? 1.4 bravo Tjet.

usually it happens from the 3rd gear onwards. if i step on the throttle fully too fast, i noticed that the rpm will climb but the car doesn't really accerelate. however after about 1-2sec, the car will accerelate.

problems here? how to 'solve' it?
hopefully it's not the clutch slipping...
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Old 31-03-2009   #2
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Re: Turbo lag?

How quickly do the rev rise?

The way to solve it is you have the car in the correct gear when you put your foot down. On my GT I know that I hit full boost around 3krpm for if I'm driving along and the car is doing around 3krpm and I put my foot down flat, I know it will start to accelerate really quickly. If however the engine is doing around 4krpm then I know I'm too high and I need to drop a cog for it to accelerate in the same way.

Make sense? I think I've confused myself :lol:
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Old 31-03-2009   #3
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Re: Turbo lag?

Quote Originally Posted by TypeR View Post
hi guys,
just wondering whether what i'm experiencing is 'Turbo lag'? 1.4 bravo Tjet.

usually it happens from the 3rd gear onwards. if i step on the throttle fully too fast, i noticed that the rpm will climb but the car doesn't really accerelate. however after about 1-2sec, the car will accerelate.

problems here? how to 'solve' it?
hopefully it's not the clutch slipping...
Sounds more like clutch slipping to me, if it was turbo lag, the rpm shouldn't climb rapidly.
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Old 31-03-2009   #4
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Re: Turbo lag?

If the revs are increasing, but the speedo is not climbing, this is Clutch slip, not Turbo lag.
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Old 31-03-2009   #5
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Re: Turbo lag?

This is what I am thinking hence why I asked the question about the revs.
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Old 31-03-2009   #6
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Re: Turbo lag?

There is another thread on here about the turbo in a small engined car - you need to work it up as it isn't instant...I think if you don't floor it for a second or 2 then apply full power you will get a better response.

I'm really not sure myself though - I don't really notice any lag, but then my sporty days are few and far between these days - which I'm not entirely sure how that has happened.

I'll start experimenting to see if I can get this lag thing and see how to go about not getting it...but I think sinking the pedal flat won't get much going unless the revs are already up and the turbo has spooled up and already going.
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Old 31-03-2009   #7
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Re: Turbo lag?

Definately slipping clutch. With turbo lag the revs wont rise quickly.

Turbo lag is "like" when the engine speed is not keeping up with the amount you put you foot on the accelrator - ie not what you have

Sliping clutch is when the wheels/gearbox arnt keeping up with the rpms of the engine (due to the clutch slipping and thus not fully transferring the turning force from the engine to the gearbox)

Is your foot fully off the clutch pedal? As its fairly sensative at the top end and even a few mm of depression can cause it to slip when driving spiritedly.

Alan
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Old 01-04-2009   #8
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Re: Turbo lag?

Quote Originally Posted by a1ant View Post
Definately slipping clutch. With turbo lag the revs wont rise quickly.

Turbo lag is "like" when the engine speed is not keeping up with the amount you put you foot on the accelrator - ie not what you have

Sliping clutch is when the wheels/gearbox arnt keeping up with the rpms of the engine (due to the clutch slipping and thus not fully transferring the turning force from the engine to the gearbox)

Is your foot fully off the clutch pedal? As its fairly sensative at the top end and even a few mm of depression can cause it to slip when driving spiritedly.

Alan
let me give more description...

if i floor it fully from about 2.5k or 3krpm, the rpm will climb (slowly to me, it's not like when you're at neutral and the rpm climbs faster) to about 4k-4.5krpm, then the rpm will drop slightly (maybe drop by 1krpm); and then it'll climb up again.
during the '1st stage', the car is like not accerelating; but during the 2nd stage', the car will accerelate but not really fast either.

however, if i floor it 'slowly', the accerelation is much faster and harder! can 'feel' the boost here...for the above 'problem'; can't 'feel' the boost...

p.s. i'll always lift my foot fully off the clutch before i floor it.
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Last edited by TypeR; 01-04-2009 at 00:31.
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Old 01-04-2009   #9
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Re: Turbo lag?

Then your clutch is scooby-doo'd mate!

It slips on full boost.
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Old 01-04-2009   #10
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Re: Turbo lag?

Quote Originally Posted by Piaggiocenter View Post
Then your clutch is scooby-doo'd mate!

It slips on full boost.
oh no!
no more max boost till i replace my clutch...
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Old 03-04-2009   #11
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Re: Turbo lag?

Do it sooner rather than later, or the flywheel will get scored, that'll add a few quid onto the bill!
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Old 03-04-2009   #12
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Re: Turbo lag?

Get it remapped!!
Quote Originally Posted by TypeR View Post
hi guys,
just wondering whether what i'm experiencing is 'Turbo lag'? 1.4 bravo Tjet.

usually it happens from the 3rd gear onwards. if i step on the throttle fully too fast, i noticed that the rpm will climb but the car doesn't really accerelate. however after about 1-2sec, the car will accerelate.

problems here? how to 'solve' it?
hopefully it's not the clutch slipping...
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Old 03-04-2009   #13
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Re: Turbo lag?

Yeah, another 30bhp will finish it off completely
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Old 18-05-2009   #14
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Re: Turbo lag?

Hi

I had the same issue with my multijet bravo, when ever I wanted to accelerate at the crossroad or when accelerating in first gear, the car did nothing for a second or two, then it started gaining speed.I went to a local fiat dealer and they found that one of the egr valves had an issue.After changing with a new part, the problem was gone.I hope it helps.
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Old 18-05-2009   #15
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Re: Turbo lag?

To check clutch:

With one leg push the break (with heel) and with foot-fingers press the accelerate pedal.
With other leg press the clutch and easily defer, just like you do when you want to start with your car. If car doesn't want to go "up" with front side you have clutch problem.

or tips from link
http://www.autoeducation.com/blog/item/20/
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