Turbo without BOV & running low psi

[snowybill]

Hey guys, i don't think this has been covered quite to the detail i want, so im making a new thread, i am just wondering, i want to run a modest turbo with no BOV, and low psi.
My engine is NA (obviously, lol) and im not sure if i have series one or two, because i hear series 2 is easier to work with . So, I am wondering, does anyone know if its possible to run a modest turbo, on low PSI without a Blow Off Valve ? Because i dont want it to be obvious at all that i have a turbo on at all.

Also, would i need to replace anything?
Diff?
Injectors?
Computer?
Anything?
My brakes are turbo brakes, so I've got that part taken care of.

Cheers for any help, snowy.

[nasty1]

you dont need a bov most people these days dont use them and the ysound terible.

you cant use a series 1 motor to convert to turbo or you will have to either tap a whole in the block for oil drain or some how rig up an oil drian high enough to flow freely into sump witch i have seen before

[Mayhem05]

u'll just get a huge amount of air pushing back agains ur compresor wheel everytime u close the throttle

[detox_nath83]

yeah as well as water feed and oil feed (drilled ans tapped hole to oil gallery)and like stated oil drain..
series 2 block has provisions already for this snowy you will find them on the exhaust side of your block and a big bung just above where the sump is bolted on near engine mount..
on low psi without a BOV is not really a problem as minimal compressor surge is achieved, on big boost applications it is more suited to run BOV to stop premature turbo wear on bearings and seals when the compressed air is forced back through turbo slowing comp wheel as well as strain on bearings etc

Woot just installed my cooler and piping today... turbo soon to come to connect up :P

[vn_v6]

my cousins 240sx (RICE I KNOW) hasnt been running a bov for over 2 years now, think, the blade spins at over 30000 rpm, you reallly think that it turning the other way momentarily is going to affect it? i think at max psi and max revs that heat is what will kill it, stuff no bov, maybe it does wear it out a little, but not to failure, probably some clapped out P.O.s stuffed a turbo when it was on its way out anyway after he blocked his valve

[Mayhem05]

snowy ur head compresion (im assuming its a rb30) wich is 9.0:1 and the stock low boost turbo is 7.8:1 with a different ignition and fule mapping, could cause head gasket problems if u dont address that in the first place

[detox_nath83]

high compression conversions have been done heaps of times, have not heard of any "YET" with gasket probs.
on stock boost for a high comp setup is roughly 10-12 psi on a VLT yeah ????

[VL_5SPEED]

even if your car is running low boost anyone and everyone will hear the turbo spooling up... and it will still flutter. Best thing you can do is have a hidden cooler sprayed black, quiet exhaust and no in cabin gauges (if your on your p's)

[snowybill]

ahh well i was under the impression that, there would be no flutter or noise, i guess that was kinda naive, oh well. Well I have a custom CPU chip, so would i need to change that to stock before i go turbo? Would that be expensive ?

you hit the nail on the head 5 speed, i want it to be kinda discreet, so i don't get any attention from the fella's in blue. I haven't been pulled over before, at all, and ive been driving my VL for about a year now. So im going pretty well with the whole, not driving like a ******** and being a cop magnet side of things.

[Mayhem05]

i was assuming 6 to 8 psi was low

[thewheeldeal com au]

If you are after no noise you need to run a BOV... that is what they are desined for in the first place (look it up). Just don't vent it to atmosphere like everyone else does.. If you get a plumb back BOV you will not hear any flutter or pressure release... you may still hear the turbo spool though... BOVs are not designed to extend turbo life (as most marketing material will have you believe) they are designed to prevent noise from compressor surge at the compressor housing. Running a plumb back will also keep the turbo spinning whilst you change gears (hence no/minimal noise) and give you less lag on gear changes.

[Nackerz]

i have a high comprexssion setup and im running about 12 psi and no headgasket probs as yet but i just put a brand new one on as i had to change heads because of broken exhaust studs but still using an NA head....

all im going to get eventually is a bigger cam i think and will be all good and push a little more power out

[snowybill]

nice nackerz.
well thanks wheeldeal, that was what i was talking about. Thankyou, i wasn't sure if it was true or not. Well as long as i dont drive like a ******** it should be okay, also i have a 2.5 strait thru exhaust, will this need upgrading ?

[Abrowne70]

Headgaskets start going when people pump too much boost into their motors 10+ psi, on a hi comp turbo converted motor with no aftermarket ecu for tuning, get an aftermarket ecu, and you should be safe, im currently converting mine to turbo so it will be hi comp with a hi flowed turbo pumping 10psi, hidden front mount and 3" exhaust.

But headgaskets are a problem of hi comp turbo conversion

[snowybill]

Well, i only want to run low psi, probably 6-8 and defeinitely no more than 10. Will i need a front mount? And will i need to upgrade my exhaust from 2.5 inch to 3 ? Also, how do you hide a front mount? lol

[thewheeldeal com au]

You don't NEED any intercooler, that said they are definately worth having. Whether you front mount one or run a water-air setup is entirely up to you. My preference is water-air simply because in my opinion they provide more consistent intake temps and generally require less air volume than a front mounted setup, thus giving less turbo lag.

[snowybill]

obviously water air would be what im running atm. Will i need to upgrade by exhause from 2.5inch straight through, to a larger 3 inch system ?

Also, does anyone know a good turbo to take care of what im looking for ?

[detox_nath83]

get a a stock vl T3 turbo and highflow it :P
2.5 will work but suggest a 3" as you are forcing more air in thus getting more exhaust to get rid of

[snowybill]

So you mean the turbo that came stock with VL's ? I should get one of those ? Also, i know im a dumbass, but what exactly is highflowing a turbo ? lol . feel free to give me $#&t about knowing nothing about cars lol.. good place to learn tho i think

[rb26dett]

After driving around on low boost, you will want to increase it.

[nasty1]

Well, i only want to run low psi, probably 6-8 and defeinitely no more than 10. Will i need a front mount? And will i need to upgrade my exhaust from 2.5 inch to 3 ? Also, how do you hide a front mount? lol

6-8 psi on an n/a convert is like running 12 psi on turbo motor or about that.

im running 12 psi on my n/a convert but i was using a 1.6mm copper head gasket.at the moment the head gasket is giving me dramas as my block isnt oringd and it wants to seep water so im going for 2 genuine nissan head gaskets witch i just completed today so ill see how i go with that

[VL_5SPEED]

Yes you need an intercooler for a high comp setup. You can run just as much boost as a lower comp as long as you have good fuel set up and a good tune. All new turbo cars are high comp.

2.5" exhaust will work fine

a hidden cooler is just a normal front mound intercooler what doesnt hang below the front bar. See vl berlina 5spds vl for example. Its a gk tech intercooler.

[detox_nath83]

goodluck bruz with that bow.....hmmmm drunk i am...all will work out

Snowy your not a noob its all about learning bloke... its all good as long as u r a car enthusiast wanting 2 learn.
man im installing a turbo in a few days. just installed cooler(c Pics in channel) so stick with it and we will help you through.. call out to Vl 5 speed, Nackerz, Bax, Goon, Bow Down. if i missed any u know who u r all wanting to help the Vl commo cult live :P

[VL_5SPEED]

the vl will never die in this heart

[detox_nath83]

haha exactly man exactly