Can anybody tell me how much power the stock internals can take on a 93 uk tt, and how how much boost can you safely run?

:D

14PSi is pretty much your safe limit with stock turbos/injectors and intercoolers. But it's advisable to have a replacement chip fitted. You could see gains of up to about 370bhp on a strong engine.

well i believe my car is chipped already, and running 14psi on standard turbos injectors etc. but can you turn the boost up on standard turbos if everything else were uprated?:rolleyes:

Do you have a boost controller?

 

The thing with the Z is, each critical components can take a different amount of boost at certain levels. If you simply fit bigger turbos, then you'll reduce the efficiency of the injectors and you'll get detonation leading to damaged pistons. So whereas with stock turbos, your injectors can run safely up to 14PSi, if you put huge turbos on it and leave the boost levels the same, you'll get detonation.

 

Stock turbos can be run at about 15-16PSi, but your injectors will be running lean at this point (14PSi being the safe limit for your injectors). Your ICs cool effeciently a little higher I think at around 17. But it's your injectors that are the biggest restriction.

stock turbos will become inefficient above, say, 15psi. when you reach this point and want to push more power out, then its intercoolers, injectors, rebuilt/uprated turbos, probably rad, all in pretty much one go :(

So what would happen if you put bigger inj in a n/a

Not a lot! You'd probably get loads of black smoke out of the exhaust. lol

 

You need to have accompanying mods really. No point trying to push more fuel through that it actually requires.

would it actually run ? I'd of though it would need remap with bigger injectors

Can anybody tell me how much power the stock internals can take on a 93 uk tt, and how how much boost can you safely run?

:D

 

Stock injectors 14/15 psi is 100% fuel duty

Stock intercoolers 14/15 psi is about max efficiency

Stock turbos efficiency 16/17 psi is about max efficiency

 

Stock internals...well there are examples in the states hitting 500-600rwhp on stock internals. However most of them are fresh rebuilds and the rest are a ticking bomb.

 

Realistically when you upgrade to larger turbos, and subsequently have to remove engine, thats the time to go for a rebuild with forged pistons. Aftermarket forged rods if your chasing big power. Stock crank is fine.

No point in fitting TT injectors in an NA, unless the rest of the modifications have met the limits of the stock NA injectors.

 

You need ECU remapped anytime you fit larger injectors so the correct injector "k value" on the chip can be changed.

Edited October 16, 200817 yr by Yowser

i dont have a boost controller,but if i did get one and bigger injectors would that mean i could turn the boost up 1 or 2 psi? if so would i see a lot more power?:rolleyes:

Aftermarket forged rods if your chasing big power. Stock crank is fine.

 

Stock Rods are already forged, are they not ?

i dont have a boost controller,but if i did get one and bigger injectors would that mean i could turn the boost up 1 or 2 psi? if so would i see a lot more power?:rolleyes:

 

 

My advice would be never run your car maxing out a component, You are only going to reduce the lifespan of it.

 

If you run 14 psi constantly on stock urbo's and injectors, one drop of bad fuel and you're getting det, don't notice it or it happens too much, then you're gonna crack your landers between the piston rings.

 

If you are thinking of putting 555 injectors in just to get another 2 psi, the tub's will be blowing hot air out and be working to thier maximum constantly especially if you stick with stock IC's. Keep this up you're going to have replace them real son due to leaking seals or misaligned compressor/turbine wheels.

 

Play it safe, run at 12.5 - 13 psi max and leave the margin or error gap for bad fuel.

 

There really is no point in changing your injectors without changing the turbo's unless of course your injectors are faulty and you don't have the money to do the turbos at the same time.

so the rods dont need replacing?

Stock Rods are already forged, are they not ?

 

Yes, but lower quality and heavier to aftermarket forged rods.

While you may make a little more power running the boost up to 16/17 psi (with bigger injectors and intercoolers), dont expect the turbos to last very long at all.

so the rods dont need replacing?

 

 

 

No mate, as they are forged the average engine rebuild doesn't do them.

That said, those chasing mega power and throwing big money at the build will normally buy aftermarket rods as they are also llighter and it's a new part in the block, so one less thing to break with all the extra stress.

Anyone under 500bhp, i wouldn't suggest getting new rods, unless you just fancy fitting them.

smithy

well ive not had my 300 long and its been running 14psi since ive had it, and a lot of people told me this is safe! how true is this?

well ive not had my 300 long and its been running 14psi since ive had it, and a lot of people told me this is safe! how true is this?

 

Most run 13-14psi with a Chipped ECU on stock turbos, injectors, intercoolers, internals. No problems.

thank you my mind has been put to rest:bow:

3 weeks later.... Bang !! Guys, I've got a problem :D.

 

Only kidding ;)

You shouldn't have problems if you do the job properly. Steve-300zx is running stock internals and look at the reliable power his is producing. :)

Steve-300zx is running stock internals and look at the reliable power his is producing. :)

 

What's unrealiable power ? Is that when you get a high BHP figure on the dyno just before it goes BANG !!!!.

 

Sorry ignore me I'm in holiday mode today.

It's when people turn up the boost too high, don't change maps, run high boost when sensors are failing etc etc. I'm not talking mega power here, just 14PSi...ie, safe limits on a GOOD engine.

We are all talking pie in the sky!

 

The 300ZX is a 15 year old supercar, that has been available cheaply allowing people who cannot afford to look after them to buy them!

 

When we talk people running 10 billion bhp on stock internals reliably, it is irrelevant, because that person may only use all that bhp on a once a year blast and lets face it, one persons idea of a blast is another's idea of a sunday cruise!

 

I think the most important issue is can you afford to run the car to it's max and afford to have an engine/gearbox/turbo rebuild?

 

Have you got the car serviced and running correctly and safely beforehand?

 

Maybe think about upgrading the cooling system before uprating the output of the car, i.e. radiator/oil cooler/intercoolers?

dont forget the brakes too, stock brakes suck!

 

As far as I know my injectors are stock, but my car still runs a little rich at 18psi on the rollers? Its turned down to 16.5 now but the injectors still havnt missed a beat on the 4 or so sessions I have done.