Boosting On Neutral

[JnJ]

hey guys just need help on troubleshooting the problem or explain to me what's going on lol. recently installed a hks evc 5, everything seems to be installed accordingly, just one problem is that i'm receiving a reading saying that the car boosting while the it's on neutral. usually gives out 54kpa otherwise 7psi on 7000rpm, i know it's not meant to be boosting on neutral, i've checked the connections everything seems alright. Need help.

-thanks

[femno]

You need to be a bit clearer.

What does 'its on neutral' mean?

[JnJ]

oops my bad suppose to be "while the car" is on neutral.

[JCaSs1001]

while the car is "in" neutral?????????? if u rev it?????????

[krzysiu]

wouldnt that mean negative (-) 54kpa meaning your car is in vacuum?

[JonnoHR31]

most turbos will make some boost in neutral, especially small stocker turbos

[streatracer]

Yeah mate at that kind of rpm most cars will build some boost in neutral. It's completely normal. not a problem.

[JnJ]

while the car is "in" neutral?????????? if u rev it?????????

yeah while the car is in neutral and reving it hence the 7000rpm

Edited October 20, 2009 by JnJ

[blind_elk]

Good luck to your engine.

[JnJ]

thanks streatracer and JonnoHR31 for clarifying this, thought something went wrong with the installation.

[Haines]

shit !!!

who revs their own cars to 7000rpm in neutral ??

save that shit for your rental cars mate

[JnJ]

shit !!!

who revs their own cars to 7000rpm in neutral ??

save that shit for your rental cars mate

lol was just testing something cause at mid range rpm evc stated that it boosted 10kpa so just reved it some more just to clarify whether what the evc has shown was true or not. first time seeing it boost in neutral as well bit puzzled.

[Sheriff Wan]

Boosting in neutral and boosting while in gear driving are 2 very different situations...

[FATGTS-R]

Never done it myself as I've always heard it was very cruel to the engine but why exactly is it worse to rev to say 7,000rpm in neutral as opposed to in gear?

I understand when in gear and on the move the engine is under load but why is it worse in neutral when there is minimal load?

[JonnoHR31]

its not worse. hitting 7000rpm in say 2nd or 3rd puts shitloads more load on the motor than hitting 7000 in neutral, aslong as the car is running fine (not too lean or too much timing up there, good oil etc) then what you did isnt gonna hurt it

[TiTAN]

assuming you dont start the engine and then just go straight to 7000.

[JnJ]

assuming you dont start the engine and then just go straight to 7000.

yeah, it was warmed up.

[Parag0n]

Some turbos do some don't, on my twins they didn't, on my big single yes.

[MBS206]

its not worse. hitting 7000rpm in say 2nd or 3rd puts shitloads more load on the motor than hitting 7000 in neutral, aslong as the car is running fine (not too lean or too much timing up there, good oil etc) then what you did isnt gonna hurt it

That's the difference, an engine in neutral with a huge quick rev up to 7000RPM is more damaging if oil pressure isn't quick enough.

On the street, motor is loaded, doesn't rev up as quickly, the oil pressure "lag" is barely noticeable...

But a very quick free rev, it can be quite noticeable depending on how quickly the motor revs out of gear.