REDUCING LAG on stock turbo, stock engine

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profane

Member +
REDUCING LOW RPM LAG on stock turbo, stock engine

Hi everyone, I know a similar thread has been put up by Gee but I didn't want to hijack it since it had developed quite a bit.

Lately, I have been bothered by the lag at low rpm, that's just when you put your foot down.

I have been thinking the following things might help reduce lag but I want you guys to access this and tell me where I am wrong.

Note: No changes to engine internals and/or turbo is desired.

1. increasing fuel at low rpm.
2. changing stock exhaust manifold to an aftermarket one.
3. putting bit bigger injectors than stock.

What else, if any?
 
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cole

cole

Member +
bigger injectors wont make it spool up quicker
there only for when your injectors cant cope with the air ( boost ) going into the engine thats when you go for bigger injectors and more fuel at low rpm wont do anything it will make it run rich and just waste fuel

a decat and manifold would proberbly help a tiny bit but nothing massive
 
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Fastfish

Member +
Wow if you think you get lag on a standard tubby......go in a quick car with a big tubby and see what lag means...........
 
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profane

Member +
mate believe me when I say the lags there..its embarassing actually...

So one is out as it seems - adding bigger injector, thanks cole
 
Sheldon

Sheldon

Malta Area Rep.
lol you sure you got a STOCK turbo? ei ct9??? you should drive my car then youl see whats lag lol
 
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profane

Member +
what? does it mean none of you have felt it on a ct9??? I am not joking. I know about lag on bigger turbos that is why I am so concerned about lag on my stock ct9b.
 
GT_Neil

GT_Neil

Member +
this is true, there is very little lag with the ct9.

uprated exhaust mani and decat, with that the turbo will be ready to spool at about 2500 rpm. Which really is cruising rpm...?
 
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CMR

Member +
Coming from quite a few N/a cars to a Glanza I can also say there is very little lag with the CT9.

Unless your trying to accelerate in 5th at 30mph and calling that lag?
 
GT_Neil

GT_Neil

Member +
CMR said:
Coming from quite a few N/a cars to a Glanza I can also say there is very little lag with the CT9.

Unless your trying to accelerate in 5th at 30mph and calling that lag?
Click to expand...

that could also just be called painful lol.
 
ChrisGT

ChrisGT

Member +
I think theres something wrong mate! With stock TMIC, stock turbo, stock everything there is next to no lag. Unless like someone said, your in 5th and trying to accelerate! lol

Maybe your turbos fooked?
 
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profane

Member +
CMR said:
Coming from quite a few N/a cars to a Glanza I can also say there is very little lag with the CT9.

Unless your trying to accelerate in 5th at 30mph and calling that lag?
Click to expand...

Oh common I am not that bad. but now I putting a couple of things together, my car gives off blunt missing type sound at high revs which seems to be starving, could it be that when I put my foot down from low rpm it starts to starve and cause lag thereafter?
 
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lanxter

Member +
does engien management light come on when you get the missing sound?

if so your hitting fuel cut, which means cars running more than standard boost.

go out for a run and check your revs should be on boost about 2500rpm which you wouldnt really notice mate tbh
 
cole

cole

Member +
sounds like either your ht leads are nackered

your spark plugs

or your dizzy cap

or could be a combination of all 3

get some uprated leads
 
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profane

Member +
lanxter said:
does engien management light come on when you get the missing sound?

if so your hitting fuel cut, which means cars running more than standard boost.

go out for a run and check your revs should be on boost about 2500rpm which you wouldnt really notice mate tbh
Click to expand...

no no no its not fuel cut. I know very well whats that like and no, no check lights come on.
 
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profane

Member +
cole said:
sounds like either your ht leads are nackered

your spark plugs

or your dizzy cap

or could be a combination of all 3

get some uprated leads
Click to expand...


I have been told that starving is due to fpr or fuel pump, more likely the latter one. its not missing its starving so cant be this 3.
 
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