Please Help With Turbo Selection Z32NA - Holset rear (remote) turbo?!
11-03-2011, 09:17 PM
#11
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Join Date: Sep 2011
Posts: 10
Thanks for the reply - very encouraging.
- Did you use a single 2" after a merge back to the turbo, or 'dual' 2" back to the turbo?
-Did you ever suspect that the 2" cold pipe was undersized, or did you feel it was just right?
Thanks!
BTW: The 200sx SE was one of my favorite cars of that time. I know it well. A sleeper. If I tripped over a good one I'd probably consider snapping it up, but a good one would indeed be rare around here.
- Did you use a single 2" after a merge back to the turbo, or 'dual' 2" back to the turbo?
-Did you ever suspect that the 2" cold pipe was undersized, or did you feel it was just right?
Thanks!
BTW: The 200sx SE was one of my favorite cars of that time. I know it well. A sleeper. If I tripped over a good one I'd probably consider snapping it up, but a good one would indeed be rare around here.
11-04-2011, 10:41 AM
#12
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Join Date: Nov 2011
Posts: 6
Thanks for the reply - very encouraging.
- Did you use a single 2" after a merge back to the turbo, or 'dual' 2" back to the turbo?
-Did you ever suspect that the 2" cold pipe was undersized, or did you feel it was just right?
Thanks!
BTW: The 200sx SE was one of my favorite cars of that time. I know it well. A sleeper. If I tripped over a good one I'd probably consider snapping it up, but a good one would indeed be rare around here.
- Did you use a single 2" after a merge back to the turbo, or 'dual' 2" back to the turbo?
-Did you ever suspect that the 2" cold pipe was undersized, or did you feel it was just right?
Thanks!
BTW: The 200sx SE was one of my favorite cars of that time. I know it well. A sleeper. If I tripped over a good one I'd probably consider snapping it up, but a good one would indeed be rare around here.
http://club-s12.org/v3/index.php?topic=8278.0
Last edited by mcx; 11-04-2011 at 10:48 AM.
11-05-2011, 01:31 PM
#13
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Join Date: Nov 2011
Posts: 11
finally!!!
after 2 days of searching i have found some useful information.
i have a 1994 nissan 300ax convertible that i am planning this same build on - except i am a realist and dont want over 6 lbs of boost.
i have several questions, but ill start with one as i am still in the planning stages of this build...
how do you plan on turning a single 2 inch cold pipe into 2 - 2 inch intakes?
i was toying with the idea of building my own custom single intake plenum with a 3 inch throttle body.
are you goona put the MAF before or after the turbo? ive seen it both ways on this car.
ive seen a couple builds like this with the z32 and it seems like they were most affective with undersized turbos because they spool up easier and you dont need more than 8 lbs of boost to be affective.
i saw a rear mount on a NA z doing 320rwhp on youtube running 7 psi !!! that is pretty impressive for a 1000 dollar build.
after 2 days of searching i have found some useful information.
i have a 1994 nissan 300ax convertible that i am planning this same build on - except i am a realist and dont want over 6 lbs of boost.
i have several questions, but ill start with one as i am still in the planning stages of this build...
how do you plan on turning a single 2 inch cold pipe into 2 - 2 inch intakes?
i was toying with the idea of building my own custom single intake plenum with a 3 inch throttle body.
are you goona put the MAF before or after the turbo? ive seen it both ways on this car.
ive seen a couple builds like this with the z32 and it seems like they were most affective with undersized turbos because they spool up easier and you dont need more than 8 lbs of boost to be affective.
i saw a rear mount on a NA z doing 320rwhp on youtube running 7 psi !!! that is pretty impressive for a 1000 dollar build.
11-05-2011, 01:48 PM
#14
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Join Date: Nov 2011
Posts: 11
oh and by the way - i gave away a very very nice 1988 nissan 200sx years ago when i lost my lisence. i gave it to my roomate in exchange for driving me to work... i regret doing it ever since. i loved that car even tho it only had the 4 cylinder in it , it was quite snappy and handled like a dream. he sold it to someone else we worked with for 300 and he got drunk and busted all the glass out after a fight with his old lady - he sold it for scrap - 75 buck after that.
... this car ran perfect , no rust, 110k miles. id love to have it back
... this car ran perfect , no rust, 110k miles. id love to have it back
11-05-2011, 05:48 PM
#15
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Thread Starter
Join Date: Sep 2011
Posts: 10
finally!!!
after 2 days of searching i have found some useful information.
i have a 1994 nissan 300ax convertible that i am planning this same build on - except i am a realist and dont want over 6 lbs of boost.
i have several questions, but ill start with one as i am still in the planning stages of this build...
how do you plan on turning a single 2 inch cold pipe into 2 - 2 inch intakes?
i was toying with the idea of building my own custom single intake plenum with a 3 inch throttle body.
are you goona put the MAF before or after the turbo? ive seen it both ways on this car.
ive seen a couple builds like this with the z32 and it seems like they were most affective with undersized turbos because they spool up easier and you dont need more than 8 lbs of boost to be affective.
i saw a rear mount on a NA z doing 320rwhp on youtube running 7 psi !!! that is pretty impressive for a 1000 dollar build.
after 2 days of searching i have found some useful information.
i have a 1994 nissan 300ax convertible that i am planning this same build on - except i am a realist and dont want over 6 lbs of boost.
i have several questions, but ill start with one as i am still in the planning stages of this build...
how do you plan on turning a single 2 inch cold pipe into 2 - 2 inch intakes?
i was toying with the idea of building my own custom single intake plenum with a 3 inch throttle body.
are you goona put the MAF before or after the turbo? ive seen it both ways on this car.
ive seen a couple builds like this with the z32 and it seems like they were most affective with undersized turbos because they spool up easier and you dont need more than 8 lbs of boost to be affective.
i saw a rear mount on a NA z doing 320rwhp on youtube running 7 psi !!! that is pretty impressive for a 1000 dollar build.
Well, realistically I think the stock NA could survive with 10lbs -IF IT'S ROCK SOLID,IF THE CHARGE TEMP WERE KEPT LOW ENOUGH, AND IF THERE IS PLENTY OF FUEL WITH CAREFUL TIMING AND TUNING. Lot's of 'IFS'. This is why I am refreshing my motor with TT pistons
This way I can go as far as is reasonable, assuming I'm lucky enough to see my turbo generate plenty of boost!I plan on ditching the belt driven fan. There would be plenty of space then to simply Y into the dual TBs. My gut is telling me that 2 1/8 or 2 1/4 may be better for the VG30DE as it certainly can move air faster than the VG30E - Losing sleep on that one though
I thought of the custom plenum idea, then it dawned on me that the Nissan engineers spent millions in that long runner set up, which works mint. Who am I to think I can do better?
I am going to go 'blow through' on the MAF, yup after the turbo.
Yes, of course a small turbo will spool faster. Keep in mind that the Holset HE351VE that I'm using has the variable vanes on the hot side. The hot side can be adjusted from too small to too large. If this were controlled, the idea would be to have a very early spooler with few limitations up top. It's an experiment for sure - which is really the point of the whole thing at this point, for me.
Also, this holset weighs in at about a zillion pounds. This along with the battery relocate might just get me to 50/50 f/r weight ratio LOL
11-05-2011, 06:15 PM
#16
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Join Date: Sep 2011
Posts: 10
The thing that is really bugging me is the stupid scavenge pump for the oil. seems most everyone complains that they end up dying or leaking or exploding or..... And they are sooooo inexpensive (sarc) 
Hmmm - should I just put the turbo front of the engine, and push the radiator forward - thereby making this whole thread irrelevant? Sigh...
Hmmm - should I just put the turbo front of the engine, and push the radiator forward - thereby making this whole thread irrelevant? Sigh...
11-07-2011, 06:36 AM
#18
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Join Date: Nov 2011
Posts: 11
i agree that the stock nissan plenum is near perfect... but you have to remember it was designed as a naturally aspirated intake. a motor normally sucks in air - forced induction makes the long runner tubes almost irrelavent i think. - i think the long tubes are to reduce the air vortex during intake stroke allowing air to be pulled in like a solid stream rather than competing for the same space and swirling around. but i culd be wrong tho - like i said - i am no expert.
the twin turbo came out after the NA and was supposed to be a more "exotic/ supercar" type of ride, but people didnt really want the NA after that so they changed the production schema and the twin turbo became more commonplace.. (this is what i read somewhere - i cant garauntee how true it is)
dont get me wrong - i am no expert, i am trying to learn as much as possible before i jump into this project but i have seen a few pictures of single turbos with custom plenum and i gotta tell you, they look soooooo much cleaner and simpler, and you cant beat the space saving.
i am going to take some measurements to see if it can be done.. but i am thinking about these things...
relocate battery to the back.
replace the battery with a liquid intercooler.
these kits arent much more than a regular aircooled intercooler but -- they take up less room and can be put anyhere - even right inline with your piping if you want (barrel design lookes like a 4 inch piece of pipe)just route your water and heat exchanger tubes to the front.
i think frozenboost dot com has complete kits in all shapes and sized starting around 350.
simple single throttlebody intake , and i am going to try to face the intake to the rear where the battery used to be instead of the front.
if i dont go with the custom plenum idea.. im considering a 1 to 2 intercooler - but running it backwards to it will have one intake from turbo, splitting into 2 output to the dual intakes on the car. and mounting it where ever i can find room.. i want to keep the tubing as short as possible tho so that why i keep going back to liquid intercoolr.
i will be trying this set up on the engine i currently have in the car - then when its time (maybe after itsblown or i get it running how i like it) i have a 36k mile replacement engine waiting to drop in that i can hopefully bolt my fab work to.
and i will likely put 8.5 or 9:1 pistons in the new engine or have a custom 1/8 inch or 2mm head gasket cut out of stainless on the water jet where my dad works. - there by reducing the compression to about 165 - i think thats a nice medium that will allow about 12lbs of boost easily an still have enough so it will have some really good bottom end.
like i said tho... these ideas are all swirling aound and its gonna be a trial and error once i get started.
the biggest obsicle with these cars is space. since i have a convertible i have an actual trunk that will alow me to do some things that others might not be able to - things like trunk mount oil system, or water tank for liquid intercooler. not that you cant do those things in a hatch but i have to think that the trunk would be better. its a toy to me anyway not my main car. not even my second car for that matter. but i want it to look clean and be reliable enough for me to drive regularly and not some track car. think 375hp sleeper that i can drive anywhere - i know should drop in a TT and be done... but come on, we all know that can be done.
the twin turbo came out after the NA and was supposed to be a more "exotic/ supercar" type of ride, but people didnt really want the NA after that so they changed the production schema and the twin turbo became more commonplace.. (this is what i read somewhere - i cant garauntee how true it is)
dont get me wrong - i am no expert, i am trying to learn as much as possible before i jump into this project but i have seen a few pictures of single turbos with custom plenum and i gotta tell you, they look soooooo much cleaner and simpler, and you cant beat the space saving.
i am going to take some measurements to see if it can be done.. but i am thinking about these things...
relocate battery to the back.
replace the battery with a liquid intercooler.
these kits arent much more than a regular aircooled intercooler but -- they take up less room and can be put anyhere - even right inline with your piping if you want (barrel design lookes like a 4 inch piece of pipe)just route your water and heat exchanger tubes to the front.
i think frozenboost dot com has complete kits in all shapes and sized starting around 350.
simple single throttlebody intake , and i am going to try to face the intake to the rear where the battery used to be instead of the front.
if i dont go with the custom plenum idea.. im considering a 1 to 2 intercooler - but running it backwards to it will have one intake from turbo, splitting into 2 output to the dual intakes on the car. and mounting it where ever i can find room.. i want to keep the tubing as short as possible tho so that why i keep going back to liquid intercoolr.
i will be trying this set up on the engine i currently have in the car - then when its time (maybe after itsblown or i get it running how i like it) i have a 36k mile replacement engine waiting to drop in that i can hopefully bolt my fab work to.
and i will likely put 8.5 or 9:1 pistons in the new engine or have a custom 1/8 inch or 2mm head gasket cut out of stainless on the water jet where my dad works. - there by reducing the compression to about 165 - i think thats a nice medium that will allow about 12lbs of boost easily an still have enough so it will have some really good bottom end.
like i said tho... these ideas are all swirling aound and its gonna be a trial and error once i get started.
the biggest obsicle with these cars is space. since i have a convertible i have an actual trunk that will alow me to do some things that others might not be able to - things like trunk mount oil system, or water tank for liquid intercooler. not that you cant do those things in a hatch but i have to think that the trunk would be better. its a toy to me anyway not my main car. not even my second car for that matter. but i want it to look clean and be reliable enough for me to drive regularly and not some track car. think 375hp sleeper that i can drive anywhere - i know should drop in a TT and be done... but come on, we all know that can be done.
11-07-2011, 06:46 AM
#19
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Join Date: Nov 2011
Posts: 11
oh - i would really like to try to find somewhere closer to the front to hang the turbo instead of all the way where the stock mufflers are. mostly because i would still like the look of dual exhaust. seems vain i know.. but its what i want. plus i can get better throttle response with less tubing. ... opinions?
its cramped everywhere in this car
its cramped everywhere in this car
11-07-2011, 08:37 PM
#20
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Thread Starter
Join Date: Sep 2011
Posts: 10
Yea - there's the Mocal, the Shurflo, and there's another I stumbled upon on the web -
http://www.rbracing-rsr.com/partnumbers.htm#oilscavenge
Hmm - all brass pump. Looks real good for only a couple bucks more....
About the plenum - I agree, a custom one would make all the difference as far as packaging. The thing is, when off boost I think those long runners will make all the difference for street drivability. I am not making a drag car, and I made the executive decision to work w/ the factory plenum - 3 reasons..
1 )see above
2) speed, I want to drive it someday
3 )cost
I thought about the 2-1 Intercooler as well! I was combing all over the web looking at them. I think it's a great Idea. I think I'm going to skip the air/air IC and depend on an aluminum charge pipe and water injection. I can always stick a water/air in later if need be, But I'm not sure it's necessary. I think throttle resp will be a lot better w/o the air IC.
I think my watr inj tank will go where the battery was, I bet you could fit 3 gallons there if you wanted to.
Maybe if the rear mount turbo went as far forward as possible, we could imitate a dual exhaust, I dont know what it looks like under the convertible though.
I converted to one of the smaller GM alternators a while back (that nissan one sucks, Delco makes the best IMO). I am thinking I might be able to relocate the alternator to just under the AC compressor, replacing the tensioner. This will give ample space to sweep a cold charge pipe from between the block and motor mount, and take it right on up....hmm
The real trick is going to be the VVT turbo. I want to control the size of the exhaust housing based upon boost pressure and throttle position. Can you imagine having 'what appears to be' a very small turbo early - and when things start cooking, it opens up like a BIG turbo?
I can handle the electro/mech part but programming a microcontroller is stretching it a "bit" for me right now. I have some friends that are programmers, if I can steal some of their time....
http://www.rbracing-rsr.com/partnumbers.htm#oilscavenge
Hmm - all brass pump. Looks real good for only a couple bucks more....
About the plenum - I agree, a custom one would make all the difference as far as packaging. The thing is, when off boost I think those long runners will make all the difference for street drivability. I am not making a drag car, and I made the executive decision to work w/ the factory plenum - 3 reasons..
1 )see above
2) speed, I want to drive it someday
3 )cost
I thought about the 2-1 Intercooler as well! I was combing all over the web looking at them. I think it's a great Idea. I think I'm going to skip the air/air IC and depend on an aluminum charge pipe and water injection. I can always stick a water/air in later if need be, But I'm not sure it's necessary. I think throttle resp will be a lot better w/o the air IC.
I think my watr inj tank will go where the battery was, I bet you could fit 3 gallons there if you wanted to.
Maybe if the rear mount turbo went as far forward as possible, we could imitate a dual exhaust, I dont know what it looks like under the convertible though.
I converted to one of the smaller GM alternators a while back (that nissan one sucks, Delco makes the best IMO). I am thinking I might be able to relocate the alternator to just under the AC compressor, replacing the tensioner. This will give ample space to sweep a cold charge pipe from between the block and motor mount, and take it right on up....hmm
The real trick is going to be the VVT turbo. I want to control the size of the exhaust housing based upon boost pressure and throttle position. Can you imagine having 'what appears to be' a very small turbo early - and when things start cooking, it opens up like a BIG turbo?
I can handle the electro/mech part but programming a microcontroller is stretching it a "bit" for me right now. I have some friends that are programmers, if I can steal some of their time....
