Twin Turbo Swap... READ

Good advice Broke....

-Wes

Alot of the owners switch there TT rear ends for NA rear ends to get the deeper gears like Broke said. Quicker off the line.

Alot of the owners switch there TT rear ends for NA rear ends to get the deeper gears like Broke said. Quicker off the line.

True... It's done all the time. :smokin:

While swapping to NA rear end may be the cheapest most effective acceleration upgrade you'll ever find for the TT Z32, I'll keep the TT gears thank you, the car will be fast enough as is. Also, I reeeeeeeally like the idea of:

3.692 TT rear = 190mph at redline.

WITH A 5SPD!:D

I am seriously considering the TT front clip swap. The reason is that I need my 2+2. Nobody ever gives that reason to do it, but I need to take my 4 year old and her mamma with me sometimes.. I wasnt sure what I needed having a 2+2. I guess Broke answered that with the new exhaust.. Anything else I will need to change? I have a 1995 Q45, I would love to put this motor in if I could find a place in Fl to do it.

for a 2+2 TT conversion, you will need to purchase the front clip, custom exhaust, custom driveshaft, and the TT fuel pump. that should be everything you will need to do the swap.

Thanks, can I just get a cat back set up, or do I have to have something custom made?? Can I cut down my drive shaft or will that have to made from scratch?

you can usea cat-back system but you will have to take it to a shop so they can add extensions between the cat pipes and the cat-back system, i am told. also, the driveshaft would be better off made from scratch. z1motorsports sells them at a fair price.

i am going to be working on a 2+2 TT swap and i have done a lot of research. i always wondered if you could buy testpipes and a 2+2 catback and then they will bolt right up but no one has given me an answer yet. also, about the drive shaft, i always wondered if i could use my driveshaft but i havent found any information on the size differences between the 2 transmissions. so basically i am going to just try it and see what works and what doesnt. then i can report back to people and tell them what can work and what cant.

Awesome man, I will be doing it very soon. I also thought about the test pipe thing. I will try to do more research as well. Let me know if you find out any more on these topics and I will do the same. I think a 2+2 turbo will be sweet.

more than sweet. JDM SWEET!!! :evillol:

You who to contact when you need the clip :D

... *cough* me *cough*

-Wes

Oh...BTW....wes. im leaning back towards the front clip again instead of pieceing it together. damn i just cant make up my mind.....

what does it take to do a tt swap in a z31, or am i just sol?

what does it take to do a tt swap in a z31, or am i just sol?

All you need is the goodies and your in business

Albert

Yea basically... I would say just drop in an RB25DET for a Zed31... Easier.

-Wes

Wes, can you get a clip?? I am interested.. I am either going to do it in the next two months, or buy something faster..

Yeap... Just PM me when your ready.

-Wes

hey wes, is it really easier to put a rb25 into a z31? i would think it would be easier to put a 300zx motor into a 300zx rather than a skyline into a 300zx, hmmm, thats just badass. Can you get front clips of rb25det's? i already know where to get them, but how much if you can get them, would it run me. The last rb25 front clip i got quoted for was $3500? i forget i think it was that, but it had shitty body panels.
-tim

yeah...im betting the rb25det will be alot easier than the vg30de(tt). the rb20det came stock in the z31 in japan. and the rb20 and rb25 are pretty easy to swap with each other. so you have to figure the rb25 will fit rather nicely into a z31, but thats all just theory speaking. zgringo posted some pics of a z31 with a rb26dett, so you know its possible. good luck...

HERE is the thread that ZGringo posted... (http://www.automotiveforums.com/vbulletin/showthread.php?t=326745)

so its kinda like the SR swap on 240's? or is it harder?

should be very similar...probably a little more difficult because nissan's v6's are a little more complicated than there I4's. but yeah...it should just swap right in there i would think.

I havent seen this addressed:
Is the driveshaft length on the 2+2 and 2 seater different? Or would it be *realistically* possible to: RHD JDM front clip + N/A 2+2 = RHD 2+2 TT? I know the RHD is next to impossible, but i had to throw it in there...another argument for another day (cost vs. gains). Anyway, a LHD 2+2 TT?

I havent seen this addressed:
Is the driveshaft length on the 2+2 and 2 seater different?

Yes. But it's not a problem since you can get an appropriate sized drive shaft built for just that application for a couple hundred dollars.

Or would it be *realistically* possible to: RHD JDM front clip + N/A 2+2 = RHD 2+2 TT?

Possible: Sure. Have the parts, just a matter of going through the entire car forward of the front seats and changing what you need to.

I know the RHD is next to impossible, but i had to throw it in there...another argument for another day (cost vs. gains).

Hardly impossible. Just time consuming and expensive (cutting holes in the firewall for clutch, brakes, steering and throttle, switching all of the above to the otherside of the engine bay, rerouting the exhaust etc and so on). So *realistically* possible? No, not really. If you are really that dead hard up for a RHD TT 2+2 it might just be easier to import one, if that says anything about the requirements of the process.

Anyway, a LHD 2+2 TT?

Easily done.

I checked a salvage and used car co. located in japan (hopefully will get stationed in okinawa anyways), that stated they HAD a TT 2+2. I thought the TT was only available as a 2 seater? Or is that only USDM? I'm hung on the 2+2 TT, or an r32, but it'll probably end up only being a GTS-T...sigh...

The TT was sold in 2+2 configuration overseas, US market seems to be the only one that didn't recieve it. If you get stationed in Oki then no problems, buy what ever your budget allows. If you stay stateside then I would suggest just buying a TT instead of swapping anything, but that maybe just me.

Why the hell is everyone so damn nuts over the 2+2? And dont' give me that "more stable at high speeds" line. Seriously, how often are you doing 150+ mph? I would think the lessened weight, superior balance and quicker responding shorter wheel base of the two seater would be much more beneficial.

I honestly just like the idea of carrying 2 more babes :-) lol. but really, i like the body lines of the 2+2. as far as the stability, i think with the right suspension mods, you can go as fast as your balls let you. I've only been 165, in an 01 vette, and that was fairly close to my limit (in traffic anyway). Anyways, you seem very well educated, and a true Z fan, and i commend you for that. Your opinions are regarded highly. Please respond.

So who is this guy talking to? I'm the friggin gimp of the Past Z forum, scorned by all and envied by none but the lowest of Civic pushing ricers. :D

Seriously though, appreciate the kind words but I'm just a guy with car that I've been through and around enough to learn a thing or two.

Anyway, I didn't mean to rant about the 2+2, just seems that's what everyone but me is hot for. To each his own I guess.

So who is this guy talking to? I'm the friggin gimp of the Past Z forum, scorned by all and envied by none but the lowest of Civic pushing ricers. :D

Seriously though, appreciate the kind words but I'm just a guy with car that I've been through and around enough to learn a thing or two.

Anyway, I didn't mean to rant about the 2+2, just seems that's what everyone but me is hot for. To each his own I guess.
Don't you be trying to take away my "asshole of the year award".
As for the 2+2, you couldn't give me one. The back seat is only good for kids, which I don't have, or speaker boxes which I don't use, too heavy.
As for being stable, gosh I've only had my 2 seater up to 185+MPH and it seemed pretty stable to me, but who am I to say?
But like you say, beauty is in the eye's of the beholder.

Anyway, I didn't mean to rant about the 2+2, just seems that's what everyone but me is hot for. To each his own I guess.

i wish i had a 2-seater TT....actually if i already didnt have most of the parts i needed to convert my n/a auto to a TT 5-speed...and i just didnt finance a new car. i probably would have just took out a loan and bought a nice TT. but yeah, whatever...i did finance another car and i do have most of the parts i need to change my n/a auto to a TT 5-speed so....thats kind of out the f***in window now. i guess i will have to settle for a 2+2 TT, shucks :rolleyes:

I scanned this FAQ and didn't see the answers I was looking for, so forgive me if I'm just unobservent...My question:

Will a 90-95 VG30DETT fit into an 85 VG30ET engine bay? (the VG30DETT comes with TT ECU, TT Tranny, wiring harnesses, etc...)

I've had a few Nissan enthusiasts tell me it shouldn't really be a problem but to expect an extraordinarily tight fit.

Yep, it fits alright. Just don't expect to be able to see the sides of the engine, and make sure you run some petroleum jelly up the sides of the engine bay when you're trying to squeeze her in. :D

Seriously though, I'm 95% complete on my project, so if you have any questions whatsoever on the swap, feel free to drop me an email or PM or something.

-Mike

Good to see you Mike..
I use petroleum jelley for other things than installing engines.
What do you mean it's a tight squeeze in the Z31. It isn't much better in the Z32.

Well I don't know about the z32, but I can't fit my hand between my rocker covers and the engine bay wall.

Hello all....well here it goes. I was on yahoo looking for a wiring harness for my friends 1994 300zx motor. We are currently in the process of doing a TT swap into his convertable NA 300z. The most we have done at this point is putting the new TT motor in his car, but in the process of exchanging the motors some how the wiring harness off his old NA motor was lost or stolen. So now I am stuck with the task of finding a wiring harness for his car. Does anyone here know of any place that I could find one? Also what do you do about the intercooler? Where do you find an intercooler with two inlets on each side? Also is there any pertinate info that you would give to me that would help in this project? I am sure people have asked this eariler in this thread but unfortunatly I don't have time to read all 7 pages worth of this thread. Any help will be greatly appreciated!!

Hello all....well here it goes. I was on yahoo looking for a wiring harness for my friends 1994 300zx motor. We are currently in the process of doing a TT swap into his convertable NA 300z. The most we have done at this point is putting the new TT motor in his car, but in the process of exchanging the motors some how the wiring harness off his old NA motor was lost or stolen. So now I am stuck with the task of finding a wiring harness for his car. Does anyone here know of any place that I could find one? Also what do you do about the intercooler? Where do you find an intercooler with two inlets on each side? Also is there any pertinate info that you would give to me that would help in this project? I am sure people have asked this eariler in this thread but unfortunatly I don't have time to read all 7 pages worth of this thread. Any help will be greatly appreciated!!

well you have completed the easiest step of the TT swap, swapping the motors. now, you have to pull the motor back out!!! :D

i do not see how there is any way possible for you to install the EFI harness with the engine in the car. here are some places to look...

http://www.amzperformance.com (check the OEM parts list)
http://www.conceptzperformance.com
http://www.z1motorsports.com

if you want to go cheap and take a chance...
http://www.twinturbo.net (go to the classified section and start a new post or search through)

it sounds like you dont really have a clue on what parts you need to complete the swap. i would search around on twinturbo.net and z1motorsports has a winderful write-up that explains what your getting yourself into.

just a list, make sure you have these parts...

-AC lines (if you want AC)
-TT transmission
-TT flywheel
-TT clutch & pressure plate
-AC condensor (if you want AC)
-N/A power steering pump
-AC compressor (if it is a JDM motor & you want AC)
-Boost controller (unless you buy a TT EFI harness)
-TT ECU
-Boost piping (from turbos to intercooler to TB)
-intake pipes (from intake to Turbos)
-TT radiator and upper radiator mounts*
-TT upper radiator hose
-pilot bushing (if you bought a TT motor out of an automatic car)
-TT half shaft or a custom driveshaft
-N/A speed sensor (tranmission specific)
-intercoolers, ducts, and brackets
-oil cooler and lines

-if you bought a JDM motor, you can use the stock N/A midpipes
-if you bought a USDM motor you will need TT midpipes to connect to the downpipes

*to put in the TT AC condensor and TT radiator you will need to customize the lower supports because they are narrower but taller than the N/A pieces. so the TT radiator sits farther down in the bay than the N/A to let the boost piping go on the side of it.

if you have any questions, start a thread and post or PM me...i am doing a TT/5-speed swap as we speak and i can more than likely take pictures for reference or verbally help you.

good luck!!! hope you know what you have gotten yourself into. :D

BTW: how in the hell did you lose the efi harness??? it shouldnt even have been removed from the car.

man.. i'd rather sell the car and buy a TT.. it will cost you more than buying a tt car.here in CA cost around $5600 to convert it to a TT... go to racycler.com and get a TT

sometimes it's not about just knowing you own a fast car, sometimes it's about knowing you put sweat tears and blood building the car to make it as fast as it is. or there's times where it's more expensive to buy a tt car than to convert one to tt (in my example, in order to get a tt for a perfect body, i'm looking at over 16 grand, where i could find an n/a with a bad engine and perfect body for between 4200 and 6400. now factor in it Just being the engine swap... no tranny, no nothing, just the engine, wiring and ecu (other stuff necessary of course) which i could find on ebay (again just the engine) for a little over 1500. i do all the work myself, now i've got a tt with a perfect body for 8-9 grand.

i guess it just depends on availability.... up in canada, any z car is hard to come by

the only reason why i am doing a TT/5-speed swap is because my N/A is in mint condition with a fresh paint job and some minor body work. plus, i want to belong to an even rarer club by having a 2+2 TT. in some peoples position it is better off to perform a TT swap.

i would need to find a mint condition TT with a fresh paint job, 25k miles on the motor and 95k on the body. also, needs to have a JDM front fascia and a mint condition interior with a very nice stereo. i think that would be hard for me to come by for $10.5k and thats about what i have put into my car, and thats including upgrading the motor to 475 hp.

Japanese engine Racing JER in S. CA will swap the RB26DETT for $10,000 . they are working now on two old Zs 260z and 280z. almost done. will take pictures for you guys

ditto. after looking at this, I'm thinking I may just go buy a camry and a crotch rocket.

-Will

ditto. after looking at this, I'm thinking I may just go buy a camry and a crotch rocket.

-Will

wuss...what would be the fun in that? part of owning a Z is the modifying part. Z's + good owner = money pit for the owner because he or she will modify till their pockets are completely empty. :D its what makes Z ownership, Z ownership.

f'n expensive z's... mine will ruin me before the year's out...

f'n expensive z's... mine will ruin me before the year's out...

lets not even talk about it...

Z's suck.


I'm on my second one. :(






It's definately a love/hate relationship.

Z's suck.


I'm on my second one. :(






It's definately a love/hate relationship.

i have hated more than loved, but i cannot deny the love. :D

mine has been sitting since february of 05'. all for some upgrades...

Mine still drives.


Barely. Can't do anything till I can afford the motor to stuff in it.

Then... then we'll be back on top of our game. :thumbsup:

Mine still drives.


Barely. Can't do anything till I can afford the motor to stuff in it.

Then... then we'll be back on top of our game. :thumbsup:
took my motor to the machine shop today. JE pistons and GT525 turbos are on their way. :evillol:

I'll raise you, your GT525s for a pair of N1's. ;)

I'll raise you, your GT525s for a pair of N1's. ;)

how hard it is it to get the uber nice N1 motor imported? heard that thing is putting out like 350ps rather than the 280ps that Nissan rated it at. :D

N1 turbos are just GT2560R's arent they? those are the same turbos i was gonna get for my build but decided that id rather give up 25whp on the street, where my car will be, in exchange for about $1000 off the price of my build costs. f***ing Greg Dupree 5-bolt downpipes are $600. wtf. its all good...next year im going GT28RS's. :lol:

we can go heads up when i get my GT28RS's...

hmm...maybe if i can sell some of the shit in my garage i can make up the extra costs and buy the GT2560R's. *heads out to garage with a notepad.*

Well, the R34 RB26 makes roughly 330hp stock. It's just rated at 276hp.

N1's are good for 20-21psi of b00st. So roughly 500whp with full bolt-ons and high-lift cams. We'll see.

Well, the R34 RB26 makes roughly 330hp stock. It's just rated at 276hp.

N1's are good for 20-21psi of b00st. So roughly 500whp with full bolt-ons and high-lift cams. We'll see.

wow...i would think that motor is making more power than that at 20ish psi. i think the VG makes near 550 rwhp at that boost level. ehh...extra .4L i guess.

good luck with it man. i think i just scored some badass turbos and manifolds. guy made 540rwhp on pump fuel with this set-up. i have never been more excited...

Well, I'm being fairly conservative with my assumptions.

In reality, it may very well make more. The RB26 can get power if you just look at it the right way.

Well, I'm being fairly conservative with my assumptions.

In reality, it may very well make more. The RB26 can get power if you just look at it the right way.

yes i know, with how much money i have spent into my drivetrain, i almost wish i would have just dropped in an RB26 and upgraded to 1000rwhp. :D

in my search, no one wants to get rid of their TTs or they are automatic (ghey) or they are convertible (meh). old thread no one probably reads it, but here's my 2 cents :iceslolan

Speaking of which.... K3 are you done YET?

Speaking of which.... K3 are you done YET?

fawk no...waiting on this so called trusted Z shop to finish my flippin motor.

Hi! I'm :newbie: here & I'm thinking of doing the N/A To TT engine swap to my car in 2 week's I'm getting a tt front clip and I have read most of the thread of the engine swap but I have I littel problem with the wiring harness some say that you can use the N/A wiring harness but you have customize some wires but I don't know which one's can you help me out with a wiring diagram of how to due so. Or which wiring harness do you recommend to use the N/A or the TT one & which is easy due Thank's.

I'm doing this because my engine f***ed up my timing belt broke doing around 5 to 6,000 RPM :banghead: & I did a compression check and it failed :frown: so you know what that mean :crying:& I still didrent think that I f**ked up my engine so I whent & change my timing belt but it still didrent work:madsign:.

Hey guys, new to the site, not to the car... but hey, i know all of you are talking about bolting up to N/A cars, has anyone ever done a VG30ET to VG30DETT? That is the project i am thinking of taking on... it just seems like paying $2000 (- shipping) for a VG30DETT and starting out around 300hp is a far better investment than paying about $2000 for upgrades to the VG30ET to get it to 300hp!

I have already upgraded exhaust, intake, 2 electric 12" puller fans, intercooler, boost controller, suspension, rims/tires, wiring and audio, wideband 02, and CRAP TONS of bondo! ... no A/C by the way

so, for any help/tips would REALLY be greatful!

Thanks Guys!

I am no Z31 expert, but from what I remember. The biggest issue you will run into with a VG30ET to VG30DETT swap is space. The Z31 has a narrower engine bay than the Z32 which means the DETT may not fit.

But you may want to check with more Z31 gurus first, I only know my Z32... and starting to learn the S130.

yeah, i know about the clearance issues... for that they have developed an engine isolater for the left mont that moves it farther under the engine to promote the use of the stock twin turbo set up. You can get them from Z31parts.com... I think.

Is there any any chance you know if there is a huge issue with tapping in to the coolent line in the Z32 heads/Z31 block and possibly machining some new bolt holes in either the block or heads to make up for the difference in 6/4 bolt patterns?

i was thinking, maybe there is a way to do a Z31/32 hybrid (Swap the Z32 24 valve heads for Z31 12 valve heads on a stock block) since both blocks are the same minus the coolent line bores... would be a hella awsome flow improvement if it would work!

Penny for your thoughts~
Thanks