Na-t Results

[psybic]

Hi,

In the last few days, I have been thinking about NA-T projects on a JZA80. I'm not ready yet, but thought I'd weight up the prices and facts first.

In my research, I have looked at as many threads as possible on the supraforums and the SAU forums to see how other people have gone.

Seems alot of people keep going on with this "My mechanic said you can't turbo a NA engine", utter BS!

At this point I bring my current ride to the table, a SR20DE, with yes, a TURBO added. It has a T28BB turbo, a SS manifold, Microtech ECU (was actually running standard SR20DET ECU for a while), runs 9psi daily. Was a drift car, so driven pretty hard, then I bought it and only added the microtech. Its been going strong for well over a year, producing over 150RWKWs at 9psi the whole time. (Which isn't bad for an SR).

So it would be really goog to have some thread or something for all the people running succesful NA-T engines, rather than hearing from people who:

a) Haven't tried and are just repeating what has been told to them; or

b) Have actually tried or know of someone who has, but the tuner didn't know what he/she was doing and things went wrong.

I can tell you from my experience, my everyday driver is great to drive, very responsive with the high comp and being caught of boost isn't so much of an issue, then when boost comes on, it runs great.

[WazR32GTSt]

i have never heard of a mechanic saying "it can't be done"

what we generally recommend is this:

- nissan made non-turbo and turbo versions of the skyline

- they differed not only in the turbo, but in many other areas too: brakes etc.

- how much will it cost to change to a turbo configurastion? consider turbo, manifold, ecu, loom, dash. then, you still are missing things like brakes, hicas, lsd that the turbo model has standard

- is it worth the cost, or simlpy easier to sell your NA nad buy a turbo model that has it all as stock?

I has an NA supra (MA70) and considered doing a turbo addition. Then i considered an engine swap. It ended up being the easiest to sell it and buy a turbo car. Thus, my R32 turbo.

[Dahtone Racing]

ill be doing the SR20DE-t conversion soon on our N15SSS

see how far i can push the high comp motor till she dies

ill post the results here once its done

[666DAN]

My car got stolen before I could ever post my final dyno results

From how my current car goes in comparison, I'd say the RB25DE+t was pushing around 180rwkw

[KamikazeR33]

on a jza80 im assuming its got a 2jzge engine like my ex gfs soarer has

if u were to do this id suggest a head change as the n/a one is pretty shitful n there is a nice dizzy that takes up alot of room in the engine bay on the exhaust side. plus the plenum is like an rb20/25 one that runs across the engine

but there is no reason y it cant b done on any engine, just dont try to run anything over 1 bar of boost at all unless uve decomp'd the engine enough

[psybic]

  WazR32GTSt said:

i have never heard of a mechanic saying "it can't be done"

what we generally recommend is this:

- nissan made non-turbo and turbo versions of the skyline

- they differed not only in the turbo, but in many other areas too: brakes etc.

- how much will it cost to change to a turbo configurastion? consider turbo, manifold, ecu, loom, dash. then, you still are missing things like brakes, hicas, lsd that the turbo model has standard

- is it worth the cost, or simlpy easier to sell your NA nad buy a turbo model that has it all as stock?

I has an NA supra (MA70) and considered doing a turbo addition. Then i considered an engine swap. It ended up being the easiest to sell it and buy a turbo car. Thus, my R32 turbo.

I've actually been thru the engine conversion also.

From my experience as a consumer, neither way is ever as easy as people say.

You don't WACK a turbo on the side.

You don't WACK an engine in an engine bay.

Some projects turn out better than others. Some people say its not meant to have a turbo on that engine. Thats right, and the GTR comes with a specific size turbo. its not MEANT to have that changed either. Some engines when tuned well, can handle more boost than they did from the factory.

I would just like to see a list of peoples results to see other satisfied Na-T people. Its fair to the people considering that option to see the full story.

ps - about the swapping heads, there is alot to be said for doing that. Injectors for one, on the 2J, you got the inlet manifold and the dizzy also. my point is more about bottom ends being strong enough to handle boost. My SR20 has the turbo head.

[CoZZm0]

  2GU UP said:

ill be doing the SR20DE-t conversion soon on our N15SSS

see how far i can push the high comp motor till she dies

ill post the results here once its done

its been done with excellent results on factory compression ratio. The issue you'll have is blowing 3rd gear and traction without an LSD.

[Dahtone Racing]

you got links to any info??

i need all the extra info i can get lol

[SLIMVLT]

i got 253 rwkw out of a converted rb30 e-t with monsta turbo gear and a 2 mm copper head gasket

its got plenty left in the motor just fuel is becoming an issue.

rising rate reg on std vlt injectors and plenty of methanol, its also on avgas.

and its manual

[SLIMVLT]

i got 253 rwkw out of a converted rb30 e-t with monsta turbo gear and a 2 mm copper head gasket

its got plenty left in the motor just fuel is becoming an issue.

rising rate reg on std vlt injectors and plenty of methanol, its also on avgas.

and its manual

[Cro_boy_Mario]

  WazR32GTSt said:

i have never heard of a mechanic saying "it can't be done"

what we generally recommend is this:

- nissan made non-turbo and turbo versions of the skyline

- they differed not only in the turbo, but in many other areas too: brakes etc.

- how much will it cost to change to a turbo configurastion? consider turbo, manifold, ecu, loom, dash. then, you still are missing things like brakes, hicas, lsd that the turbo model has standard

- is it worth the cost, or simlpy easier to sell your NA nad buy a turbo model that has it all as stock?

I has an NA supra (MA70) and considered doing a turbo addition. Then i considered an engine swap. It ended up being the easiest to sell it and buy a turbo car. Thus, my R32 turbo.

wat if u did the turbo conversion to a gts4?.......gtr drivetrain??

[Ezekial]

  KamikazeR33 said:

but there is no reason y it cant b done on any engine, just dont try to run anything over 1 bar of boost at all unless uve decomp'd the engine enough

WHY? Can you please enlighten me as to why you said this?

[unarmed_skyline]

If it were me i wouldnt be going anywhere above 5-7 psi without decomping the engine 1 bar is WAY to much you'll fry your internals probably send a piston threw the bolck

[Ezekial]

  unarmed_skyline said:

If it were me i wouldnt be going anywhere above 5-7 psi without decomping the engine 1 bar is WAY to much you'll fry your internals probably send a piston threw the bolck

OMG you people have no idea what so ever

[Cubes]

  Ezekial said:

OMG you people have no idea what so ever

here here...

Hell you can run 30psi through a 15:1 comp ratio providing the fuel is up to the task.

[VB-]

  Cubes said:

here here...

Hell you can run 30psi through a 15:1 comp ratio providing the fuel is up to the task.

so your saying he should run diesel... lol only j/k

[Rancher]

Because NA engine arn't designed to run boost, hance the higher compression on NA engine. Put some positive boost into the old girl, and you'll end up splashing all your oil and a piston or two on the road.

If you were to run positive boost on an NA engine, it would be wise not to go above 5psi, though running that little boost would decimate most turbo's cause of the already high compression from the NA engine.

If your interested in running boost, if would be best to purchase a decompresion head gasket (possibly copper, but not always) to run anything over 5psi.

On that note, running 5psi on an NA engine, and driving her hard all day, you'd end up pushing out a few pistons onto the road again. so you have to be careful. Some engine are different to others though, so if you dont try you'll never know!

Aswell as, if you were to turbo your car (In QLD anyway) you have to upgrade the brakes to the right size, for eq; Id turbo my Silva (Rb20DE) Id have to upgrade to the R32 5 stud brakes to comply with ADR rules, and be able to get it mod plated for the turbo.

On top of that, The gearbox would need to be replaced, and the dif. After driving it around for a while, you'd end up blowing them both.

Its cheaper to just buy a factory turbo, and not bother turbo'ing an NA car.

On top of the turbo, you have;

Dump pipe,

intercooler piping

exhaust,

brakes,

steering alignment,

wheel alignment,

wheels,

gearbox,

tailshaft (If need be)

diff,

Hicas,

ECU,

wiring loom,

plugs,

injectors,

fuel pump,

probably a fuel regulator,

compliance and,

Mod plates.

Its really not worth it in my opinion!

Edited August 6, 2006 by Rancher

[666DAN]

  Rancher said:

Because NA engine arn't designed to run boost, hance the higher compression on NA engine. Put some positive boost into the old girl, and you'll end up splashing all your oil and a piston or two on the road.

If you were to run positive boost on an NA engine, it would be wise not to go above 5psi, though running that little boost would decimate most turbo's cause of the already high compression from the NA engine.

If your interested in running boost, if would be best to purchase a decompresion head gasket (possibly copper, but not always) to run anything over 5psi.

On that note, running 5psi on an NA engine, and driving her hard all day, you'd end up pushing out a few pistons onto the road again. so you have to be careful. Some engine are different to others though, so if you dont try you'll never know!

Aswell as, if you were to turbo your car (In QLD anyway) you have to upgrade the brakes to the right size, for eq; Id turbo my Silva (Rb20DE) Id have to upgrade to the R32 5 stud brakes to comply with ADR rules, and be able to get it mod plated for the turbo.

On top of that, The gearbox would need to be replaced, and the dif. After driving it around for a while, you'd end up blowing them both.

Its cheaper to just buy a factory turbo, and not bother turbo'ing an NA car.

On top of the turbo, you have;

Dump pipe,

intercooler piping

exhaust,

brakes,

steering alignment,

wheel alignment,

wheels,

gearbox,

tailshaft (If need be)

diff,

Hicas,

ECU,

wiring loom,

plugs,

injectors,

fuel pump,

probably a fuel regulator,

compliance and,

Mod plates.

Its really not worth it in my opinion!

Didn't cost me much to do, my car went hard for 50,000+ kms and as far as I know is still going strong!!!

And wtf would anyone be stupid enough to put HICAS in, it's nothing but a severe annoyance..I'm looking at putting a HICAS lock on to prevent stupidly easy wheelspin due to the wheels constantly being out of geometry.

[Ezekial]

  Rancher said:

Because NA engine arn't designed to run boost, hance the higher compression on NA engine. Put some positive boost into the old girl, and you'll end up splashing all your oil and a piston or two on the road.

not designed to run boost how?? because of higher compression? compression is your friend!!

  Quote

If you were to run positive boost on an NA engine, it would be wise not to go above 5psi, though running that little boost would decimate most turbo's cause of the already high compression from the NA engine.

ok so should i be worried about my 10.2:1 compression and running 20-22psi on pump fuel? will my GT42RS decimate?

you need to spend less time listening to people with no idea

  Quote

If your interested in running boost, if would be best to purchase a decompresion head gasket (possibly copper, but not always) to run anything over 5psi.

familiar with the term quench??

[MrAnderson]

exekiel what are you using to stop detonation? you say your using pump are you also using methanol/water injection? sounds like allot of boost for 10.2:1

Edited August 7, 2006 by MrAnderson