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Stalling When Coming To A Stop

mr_rbman

By mr_rbman,
in Engines & Forced Induction

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Dr GTR Rookie

Dr GTR

Posted
Posted

I have the same problem. The guy who had the car before me put on a huge SARD dumpvalve and removed the re-circ system. Due to the dumpvalve being rusty etc the car now wants to stall when i come to a standstill and have to give it a small blip on the throttle to sort it.

No dumpvalve wont do your turbos any favours.

Gez

R34NRG Grand Master

R34NRG

Posted
Posted

u made the same mistake i did, everytime i lift off the throttle the RPMs would drop so low that it would stall everytime i clutch in.

this is caused by a blocked BOV or no BOV at all. plump it back or let it vent properly and ur probz are solved

mr_rbman Grand Master

mr_rbman

Posted
  • Author
Posted

the car was tuned when i had a bov, i like the extra throttle repsonse i get from having no bov so i'm getting a tune soon and hopefully that will fix it, garret also proved that bov's do very little to prolong the life of a turbo.

SXR Rising Star

SXR

Posted
Posted
the car was tuned when i had a bov, i like the extra throttle repsonse i get from having no bov so i'm getting a tune soon and hopefully that will fix it, garret also proved that bov's do very little to prolong the life of a turbo.

Dont understand how you get extra throttle response.......Do you know what bov suppose to do.

Gts-t Grand Master

Gts-t

Posted
Posted
u made the same mistake i did, everytime i lift off the throttle the RPMs would drop so low that it would stall everytime i clutch in.

this is caused by a blocked BOV or no BOV at all. plump it back or let it vent properly and ur probz are solved

Lol whatever, i have a BOV venting to atmo that is working 100% and i have the same problem. Though it happens very rarely. FWIW it never happened before i fitted the BOV.

Adriano Grand Master

Adriano

Posted
Posted

Cars that use an AFM need a properly recirculating blow off valve to run properly, there are heaps of tricks to get around this, but they are all bandaids. There is no dowmside to doing it the way the factory does it, except you lose the "wank" factor.

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
Lol whatever, i have a BOV venting to atmo that is working 100% and i have the same problem. Though it happens very rarely. FWIW it never happened before i fitted the BOV.

Driving style is but one of the tricks that can counteract it :P

Cars that use an AFM need a properly recirculating blow off valve to run properly, there are heaps of tricks to get around this, but they are all bandaids. There is no dowmside to doing it the way the factory does it, except you lose the "wank" factor.

As above with the tricks :sleep:

Ways around it, but best to go with the OEM equipment (or GTR items if you need to)

7yphon Experienced

7yphon

Posted
Posted

I would say get the car tuned with no BOV or put one on there for now until you get it retuned, and to be frank you will find with a Plumb back you will find the turbo will spool quicker because it doesnt have to argue with air comming back at it, try it see how well you speak with air being rammed down your Throat. It works trust me :sleep:

Bl4cK32 Grand Master

Bl4cK32

Posted
Posted

Is say theres a lot of "thinking" in this thread. Ash, get the car tuned and ignore most of the advice here....

Cars that use an AFM need a properly recirculating blow off valve to run properly

Ever seen the 180's that Nissan never fitted bov's to...or did they just make thousands of factory defects? :dry:

mr_rbman Grand Master

mr_rbman

Posted
  • Author
Posted
Is say theres a lot of "thinking" in this thread. Ash, get the car tuned and ignore most of the advice here....

Ever seen the 180's that Nissan never fitted bov's to...or did they just make thousands of factory defects? :domokun:

it does need a tune, i've been meaning to get one for a while but i don't want to get one until i get my cams and valve springs installed.

Also to the guys who are bagging the idea of not having one on there just try it and then tell me if you don't notice the difference, also as i mentioned earlier they do not prolong turbo life as proved by garrett.

BAMR33 Mentor

BAMR33

Posted
Posted
it does need a tune, i've been meaning to get one for a while but i don't want to get one until i get my cams and valve springs installed.

Also to the guys who are bagging the idea of not having one on there just try it and then tell me if you don't notice the difference, also as i mentioned earlier they do not prolong turbo life as proved by garrett.

Quote Garrett

'The Blow-Off valve (BOV) is a pressure relief device on the intake tract to prevent the turbo鈥檚 compressor from going into surge. The BOV should be installed between the compressor discharge and the throttle body, preferably downstream of the charge air cooler (if equipped). When the throttle is closed rapidly, the airflow is quickly reduced, causing flow instability and pressure fluctuations. These rapidly cycling pressure fluctuations are the audible evidence of surge. Surge can eventually lead to thrust bearing failure due to the high loads associated with it.'

eXc Mentor

eXc

Posted
Posted

I've had this problem since I've had my car, I've just always blipped the throttle before it stalled.

For what it's worth, these are the things I have replaced for other reasons - Not to solve this issue, however mabye it will cancel some things out;

R32GTST, Stock internalsm stock BOV

Fuel Pump (Bosch 044)

AFM (standard R32 Green label)

RB25 Turbo

Splitfire Coil Packs

Cleaned Air Regulator

Spark Plugs

Fuel Filter

Maybe my BOV is blocked, I'll clean all that out tonight when I am chasing my boost leak

Cubes Grand Master

Cubes

Posted
Posted
Dont understand how you get extra throttle response.......Do you know what bov suppose to do.

I do. :)

A bov is there for emissions and drivability. It hurts response as the turbo must refill the fmic and its pipework.

You obviously haven't tried no bov?

IF what garrett state *causes thrust bearing failure* a mate of mines VLT wouldn't have cracked 200,000km's on its STOCK JOURNAL bearing turbo while pushing 12-13psi for many years prior.

Have a read of - http://www.autospeed.com/cms/A_1457/article.html

Simon from Nizpro is well respected within the industry.

---------

Ash,

Your going to have to do what Sinista has done, lengthen the afm to turbo pipe. OR step the size up to a 4" 90degreeish bend. Only way your going to get around it. :banana:

Shaun also recommends no bov; get him to tune it out, he may also recommend the inlet pipe mod.

Also..... Does your AFM still run its mesh? This helps prevent stalls also *in my experience*.

mr_rbman Grand Master

mr_rbman

Posted
  • Author
Posted
I do. :thumbsup:

A bov is there for emissions and drivability. It hurts response as the turbo must refill the fmic and its pipework.

You obviously haven't tried no bov?

IF what garrett state *causes thrust bearing failure* a mate of mines VLT wouldn't have cracked 200,000km's on its STOCK JOURNAL bearing turbo while pushing 12-13psi for many years prior.

Have a read of - http://www.autospeed.com/cms/A_1457/article.html

Simon from Nizpro is well respected within the industry.

---------

Ash,

Your going to have to do what Sinista has done, lengthen the afm to turbo pipe. OR step the size up to a 4" 90degreeish bend. Only way your going to get around it. ;)

Shaun also recommends no bov; get him to tune it out, he may also recommend the inlet pipe mod.

Also..... Does your AFM still run its mesh? This helps prevent stalls also *in my experience*.

hopefully shaun can tune it out as i can't really lengthen my pipe if i wanna keep the standard airbox. The afm is missing mesh on one side (was like this when i bought it)

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