Back Pressure

[GTmike34]

I'm sure i've heard in the past someone say that skylines need an adapter plate after the turbo to cause back pressure , is this true ???.

The reason i ask is that scince i have fitted my new set up , when ever i drive my car really hard and stop ,it suddenly will stall. Under normal driving conditions....(ie - like miss daisy) the car drives and stops ok, though the idle is very lumpy.

I'm now running a T70 top mount and external wastegate and a straight through 3" system (no cat or middle boxes) and wondered if i needed to cause some back pressure by fitting a reducer plate between the turbo and downpipe. The car picks up extreamly well and goes like stink so just wondered

cheers

mike

[600hp]

Do you have a plumb back bov?

What computer are you running?

and no you do not need a plate for more back pressure.Back pressure is the devil!

[The Mafia]

Do you have a plumb back bov?

What computer are you running?

and no you do not need a plate for more back pressure.Back pressure is the devil!

amen, back pressure is the devil.

Could be your Ventmo BOV, or it could simply be the tune. are you able to list your mods?

[Jmaac]

have u upgraded injectors? got an a/m ecu thats been tuned for the setup?

[DECIM8]

timing or idle to low?

Id back your atmo blow off if you have one .. typical for that sort of problem ..

And yes back presure on a turbo kills it and is never good if you want her to continue spoooooooolin

[GTmike34]

thats what i always thought, back pressure is the devil , just could have sworn i heard/read about it on a forum somewere. I'm running a HKS bov , but i never had this problem until i fitted the new tubo set up, so would'nt have thought that to be the problem. The idle was always lumpy with me using the tomei poncams , but its now worse with the new turbo. I'm using the Power FC and TBH i know i will need a remap for optimum performance, but just wondered if there was anything i could do to stabalise the idle speed a bit before i take it.

cheers

mike

[R31Nismoid]

Its the BOV/tune combination.

So you've basically changed turbo setup with a retune ye?

[GTmike34]

yeh, ive now changed the set up inc turbo and greddy inlet manifold. The cars running the power fc so needs a tune up, but i still need to get the splitfire coilpacks and 660cc injectors before i take it for a remap, otherwise i'll have to fork out twice which is a lot of money (2 remaps).

heres a pic as it is now :-

[R31Nismoid]

Well thats your problem.

You cant just change a cars full setup and expect it to run.

Get a tune and it will fix the problem.

[The Mafia]

lol at the problem.

Time for a tune.

[GTmike34]

LOL.........got it booked in so will let you know the outcome

cheers....