Chirpn'3rd

I Just Bought A '86 300zx, Non-turbo. I Already Installed A 4" Intake, Yeah It Really Is 4". I Can't Have It Stock For Long. I Want To Turbo It, But Have A Few Questions.
1- Will The Stock Parts Off A Turbo Model Bolt Right Up?
2-i Know The Compression Is Highher On The Nt, Wiill That Cause Me Probs, Or Will I Have To Lower The Compression? And If So How Would I Do That?
3-would It Be Better To Just Got Custom Turbo? I Got Quoted By A Local Shop $4500 For A Custom Install. That Includes Everything.

Any And All Help Is Much Appreciated.

k3smostwanted

$4500 is very steep beings the stock turbo from a Z31T will supply with you all the power your N/A will be able to handle for a long time. and you cna probably pick up the exhaust manifolds, turbos and downpipes off of a Z31T for dirt cheap if you looks hard enough.

anyways, compression is gonna effect you in someway...on the N/A's higher compression even though it is not that high, you will only be able to run 5 or 6 psi of boost tops. even with that little amount of boost, you are deteriorating your engines life dramatically. if you boost any higher than that your asking for problems unless you have the fuel injectors and ECU programmed to handle it...then you might get away with another couple PSI for a while until your engine cant handle the stress anymore.

if you just want some extra power for a while then go with the N/A turbo setup...it will swap right in. you need to pick up all the turbo accessories that come on the VG30ET... and swap it in.

but if you are serious about making some serious power then i would advise you to just swap in the Z31T drivetrain or trade in your N/A and buy a Turbo model. then you can start with the real thing and work with that...

another possibility is to swap in the lower compression Turbo pistons in exchange for your N/A's...i dont know whats all different on the inside of the Z31 model'e engine but im sure its not that much, if any. but going this route is only worthwhile if you want to rebuild the engine with stronger and upgraded parts anyways...otherise this will be the most time consuming and probably the most expensive. there are a few exceptions...(1) like i said earlier, you want to rebuild the engine with upgraded parts anyways (2) you blew your motor and it needs rebuilt anyways.

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ZedEx Crew Member #4

Chirpn'3rd

WELL THATS FAIRLY BAD NEWS I GUESS. BUT VERY HELPFUL NONE THE LESS. WHAT ELSE COULD I DO IF I WANTED TO GO ALL ENGINE?

Chirpn'3rd

WELL THATS FAIRLY BAD NEWS I GUESS. BUT VERY HELPFUL NONE THE LESS. WHAT ELSE COULD I DO IF I WANTED TO GO ALL ENGINE? AND WHERE THE HELL CAN I GET AFTERMARKET PERFORMANCE PARTS FOR THIS THING?

DeleriousZ

staying all motor with the n/a isn't usually recommended unless you're out to prove something. if you wanted to, i'm sure you could make some power out of it... mind you it'd take some serious work eg. cams, valvetrain, higher comp pistons, new intake mani, more efficient exhaust mani's, larger throttle body, new intake, and possibly nitrous if you were serious about it.

bottom line is, swapping in a vg30et would be your best bet... or you could also go for a more exotic swap such as an rb20det or rb25det.... but sticking with the vg30et would be your best bet for cheap power (aside from nitrous)

what you could also do if you're wanting to go big is find a vg30et somewhere, bring it into the garage and start building it up while it's on the stand, and when it's all ready, drop it into your car... the benefiet of that is no down time, and you're dropping in some serious power when you get it built

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ZedEx Crew Member #6
1988 300zx turbo 5spd. 3" mandrel exhaust, filter, afco rad, e-fan, poly engine mounts, mbc at 8.5 psi, turboxs rfl-h bov, gutted plenum, etc.

blown turbo, under construction.. gt35 coming.

Chirpn'3rd

Where Would I Get Any High Performance Stuff For This Car? I've Searched Online And Gone To A Few Shops, But Not Much Is Available.

k3smostwanted

check the sticky labeled Good Z Resources!!! and also go to Z31.com and do some searching over there. alot more Z31 owners over on that forum that have done a lot of things to their cars that you can learn from.

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ZedEx Crew Member #4

ExTrEmEDrIfT

www.jimwolftechnology.com is a good place for the Z and there is many more jus search the stickies labeled good Z resources like k3 said it will help you out..

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Past Z Car Crew



[The Enemy Of Your Enemy is Your Friend]

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stephenp

turbo from z31 will bolt directly to the manifolds as long as they are stock and do that swap computers from a turbo and inj. and you can call it good at the stock 4 psi should be a good boost guessing around 200 wheel horse and should be quite snappy
do that and put an intake and exhaust remove the mechanicle fan in favor of electric and pull the ac pump off and your looking in the neiborhood of 225 to 250 to the ground eisily probably closer to 275 rear wheel so find the turbo , inj, and ecu and throw a fan in there and you should be smooth sailing

also if you upped the boost to closer to 7 you woiuld be near if not past 300 wheel horse but at that point the life of the engine would stasrt to go down a bit but you know it would kick some but
i had actually thought of it and actually plan to by the end of july i should have the donor motor
i had a z 31 turbo and an na but i kinda killed the na by improperly changinmg ther timing belt and the turbo i poped the head gasket reassembled and then within 3 days spun a bearing so i kinda got discouraged and out of funds and figured since i can pick up my buddies camaro for 1000 and it was stick and in mint (305 terd bodie inj.) i should do that and put my z's in storage until i get a pocket full of dough ya know lol
and actually off subject but i may have found a 280 motor for my 83 just gotta find out what i can get it for

DeleriousZ

watch out for advice from this dude, he has no regard for the life of engines...

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ZedEx Crew Member #6
1988 300zx turbo 5spd. 3" mandrel exhaust, filter, afco rad, e-fan, poly engine mounts, mbc at 8.5 psi, turboxs rfl-h bov, gutted plenum, etc.

blown turbo, under construction.. gt35 coming.

k3smostwanted

nor his own life!!!

BTW:
your not gonna be putting down 300whp on a Z31 N/A with a turbo connected to it without some serious modifications internally and externally. even a Z31 turbo will take some heavy modding atleast externally and fuel upgrades to push 300RWHP.

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ZedEx Crew Member #4

MikeMan

Maybe he was talking about the flywheel .
300hp @ flywheel should be fine without any internal modifications so long as you run some decent fuel (around 98 octane) but I agree with k3, 300rwhp is going to be pretty hard to get on stock internals. You could do it, but the engine won't last you 100kms

The only major differences between the VG30E and the VG30ET are the pistons (lower compression pistons in the turbo) and the exhaust cam profile. Regardless of what naysayers will tell you, 8 or 9psi on a high compression engine will be fine as long as you keep the boost spikes down, retard the timing a little and you run decent fuel. You could even grab yourself some toluene and mix a bit of that in your petrol tank and get the boost up to around the injectors limits (13psi iirc) without detonation. You should be able to get a drum of toluene from your local airport for around $1-$1.50 USD a litre. Just make sure you dont get it on your skin because it is slightly carcinogenic.

-Mike

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hybrid z31/z32 work in progress.
Coming soon to a dragstrip near you.

stephenp

wait i said to bolt a turbo on the na, remove the mechanicle fan, do the cone filter intake mod and put a free flowing exhaust, and run the 8 or 9 psi you just suggested and you dont think that will get you approx 300 whp????
if it will give a turbop low compresoin 250 you dont think the extra compresion and no mechanicle fan or ac will give it 50????
mechanicl fan approx 10 hp the ac unit removal well say 8 theres 18 so 32 to go....... still doubt it also depends on condition of the engine

my bad almost forgot get a msd blaster 2 coil and leave the ignition timing stock
also dont forget that the transsmission is lighter internally than that of the tubo counterpart

stephenp

forgot thats another good idea is to pull the cams out of the tubo since as stated they are a little better on the exhaust side sorry bout that and the 13 psi inj. limit is only with ecu upgrade is\nt it??? they reach full dutty at 12.5 with out it do they not and also you may wasnt to keep it under 10 without bigger inj. id think so you have a slight ability for error in boost spikes you know

MikeMan

Try 250hp at the fly. Remember that the turbos only come 200hp at the fly stock. Also, the A/C isn't that much of a drain on the engine if its not on. They use an electromagnetic clutch to engage/disengage and when its disengaged, I can spin it quite freely with my hand.

Even still, no where near 250rwhp. The transmission being lighter might net you 0.05s on the quarter, but give you all sorts of headaches down the line. If you can, upgrade the tranny to the z31t if you can. Otherwise, just make sure you've got some contingency plan if the tranny dies, because it will with the extra power sooner or later.

Thats a pretty goddamned big job in itself. The stock exhaust cams should be fine for the turbo around 7-9psi. Not the best, but if you were going to upgrade the camshafts, you'd take them to a cam shop and get them to grind you some custom cams for your application.

Yeah, but the main reason you don't run 12.5 all day long is because you start to lose the efficiency of fuel injection if its just spraying all day long regardless of where the piston is.

-Mike

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hybrid z31/z32 work in progress.
Coming soon to a dragstrip near you.