Would like to turbocharge a na 300zx

Post by **nissian240** » Sat Aug 02, 2008 7:33 pm

Getting ready to pick up a 1990 300zx and was intereseted in turbocharging this motor. I have a couple questions

1. How much hp am i looking at making at low boost?2. what problems am I looking to run into? 3. What is the turbo size commonly used for tt or t setups4. How well does the motor handle boost?5. Used trannys how much?6. What are common problems with this motor?

Also, how hard is it to pull the motor and tranny in this car?

Post by **Shady195** » Sun Aug 03, 2008 12:05 pm

1.on stock boost with the T25's ~300hp give or take

2. Snapping manifold studs, wiring and hose issues, a lot of troubleshooting

3. VG30DETT's use two(2) garette T25's ( a lot of people scrap the TT setup for a single bigger turbo)

4. Fairly decently on stock bottom end, good up to about 400-450hp safely

5. price range differs but you can probably find one for around 4-500 bucks

6. same problems any other motor exhibits except you have a very cramped space to work in unless the motor is out, your deff going to want to replace the timing belt, water pump, altenators and make sure the turbos are in good shape, and do all this while the motor is out obviously

7. if youve never pulled one before its prolly going to be a bit of a PITA but its not all that difficult

Post by **mtcookson** » Mon Aug 04, 2008 4:58 am

moved

Post by **Zwicked** » Mon Aug 04, 2008 5:33 am

Turbocharging an NA motor is a questionable affair. You can't safely add much boost, and the cost outweighs the gains. Get a tt engine and do the swap or buy a tt car to start with.

Post by **Weber3211** » Mon Aug 04, 2008 6:04 am

Shady195 wrote:3. VG30DETT's use two(2) garette T25's ( a lot of people scrap the TT setup for a single bigger turbo)

a lot of people? since when?

there's only 1 single turbo vg30 z32 that i know of...

http://s89053294.onlinehome.us/gallery/joel/

Post by **nsrZ32** » Mon Aug 04, 2008 6:18 am

Weber3211 wrote:a lot of people? since when?

As for the turbo setup, swap in a VG30DETT and be done. Its not horrible.

Post by **nissian240** » Mon Aug 04, 2008 11:17 am

I have the resources and know how to swap a motor and turbocharge so the question is not difficulty but more of the matter of price. From what I've seen the tt motor cost around $2000 and up. As far as turbo charging goes I could easily do a tt or t setup for at least the same price if not less. I'm new to the z's so please feel free to correct me on this.

Post by **Weber3211** » Mon Aug 04, 2008 11:21 am

the non turbo vg30 doesn't handle boost well. the best way to do this would be to buy the front clip from Z1motorsports. it will have absolutely everything needed to do the swap. it costs about $3,000.if you just buy a motor, it might not come with all the intercooler piping, air intake tubes etc. get the front clip

Post by **nissian240** » Mon Aug 04, 2008 11:29 am

I know the compression ratio is higher on the NA but what is difference internaly with the motor that causes it to not handle boost as well. What are the common problems with na gone turbo? Have many people gone this route?

Post by **mtcookson** » Mon Aug 04, 2008 11:31 am

The higher compression ratio is why the engine can't handle more boost. The general rule of thumb is: higher compression ratio, less boost - lower compression ratio, more boost.

If you supply enough fuel or use race fuel you can have a high compression high(er) boost setup but it likely wouldn't last very long.

Post by **nissian240** » Mon Aug 04, 2008 12:04 pm

Have many people gone this route?I'm well aware of detenation that could occur do to pre-ignition in the combustion chamber but there are ways to get around that.How bad could it be? Besides detenation is the motor pretty stout?

Post by **Zwicked** » Mon Aug 04, 2008 12:37 pm

As the other post says, the compression is the biggest issue, but also the valves are made of less heat resistant material in an NA as opposed to the Inconel valves in the tt, as well as the oiling system that sprays the pistons from the underside is different. Going the NA route to initially save money only to have to rebuild the motor in the end isn't really a good economical trade off.

Post by **OUKNO** » Mon Aug 04, 2008 12:40 pm

Look in the search for single turbo 300zx you will find a couple threads.

I havn't seen any one get away with this with out reworking the long block.If you are gonna invest in this do the VH45 swap instead and slap a single turbo on that qsiguy has his Q45 done single turbo for a while and it seems to be working out for him.Heres his write up on it:

zerothread?id=281662

There a few doing this swap craigztoyz & John Dixon are really knowledgable on the subject & elwesso has a VH45 adapter plate available. The Vh45 is actually 200lbs lighter than the TT set up.

Besides imagine how many times you'll get this.

Try the search on this site you can find out a lot of cool stuff. Search the guys I mentioned you can find out alot from there builds.

Post by **kbflip02** » Mon Aug 04, 2008 12:42 pm

nissian240 wrote:Have many people gone this route?I'm well aware of detenation that could occur do to pre-ignition in the combustion chamber but there are ways to get around that.How bad could it be? Besides detenation is the motor pretty stout?

for the longest i have been wanting to turbo my J30 which shares the same motor as the 90-96 300zx NA...in order to TT that particular motor there would be a lot involved...its not impossible its just that its reliablity would be very questionable once it was done...thats why people just swap the TT motor in...there are enough differences as subtle as they may be that would make it more time consuming as opposed to just swapping in a TT...if you cannot afford that theres always the other route which more and more people are getting interested in here lately and what i have decided to do with my J30...swap a vh45...stock it puts out almost 100more hp and lbs/ft torque than a stock TT...check the VH forum here and you will see at least 3 people who are either done or almost completely done with the swap...out of those 3 2 of them are twin turboing the car....sorry for rambling but in the end it all comes down to what youre willing to put up with ie how long your willing have the car down for as well as how much money you have to play with and finally the end result....either way i wish you the best of luck

Post by **OUKNO** » Mon Aug 04, 2008 12:54 pm

kbflip02 wrote:swap a vh45...stock it puts out almost 100more hp and lbs/ft torque than a stock TT...

you have some wrong info not sure of the torque exactly but the stock VH45 puts out 278HP<TT 300HP.

Post by **kbflip02** » Mon Aug 04, 2008 6:50 pm

stock vh in a z32 actually puts out around 300 to 310...ask craigztoyz....or even check the vh forum

Would like to turbocharge a na 300zx

Would like to turbocharge a na 300zx

Re: Would like to turbocharge a na 300zx (nissian240)

Re: Would like to turbocharge a na 300zx (nissian240)

Re: Would like to turbocharge a na 300zx (Shady195)

Re: Would like to turbocharge a na 300zx (Weber3211)

Re: Would like to turbocharge a na 300zx (nsrZ32)

Re: Would like to turbocharge a na 300zx (nissian240)

Re: Would like to turbocharge a na 300zx (Weber3211)

Re: (mtcookson)

Re: Would like to turbocharge a na 300zx (nissian240)

Re: (nissian240)

Re: (nissian240)

Re: (kbflip02)

Re: (OUKNO)

Nissan Forums

Infiniti Forums

Datsun Forums

Technical Forums

Classifieds / Marketplace

Nissan Motorsports

General Forums