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Discussion Starter #1
Hey everyone I have a 83zxt, I'm about to intercool it and put in an adjustable boost controler. Anyone know how much boost the stock ecu and fuel system can handle. Or a good way to modify it? Thanks
 

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The stock system can handle about 11 to 12 psi. You might be able to push 13psi but your injectors will have to be in perfect condition. A good way to modify the system is to talk to Jim Wolf Tech. and he will recomend a setup for your needs. I'm sure he will suggest larger injectors, and his computer upgrade. Expect to pay about $1000 for this. You may also need a higher flow fuel pump as well. The turbo Porsche pumps work well. Also, 3 exhaust and a high flow intake help a lot. Good luck!!!

Ian

> Hey everyone I have a 83zxt, I'm about to
> intercool it and put in an adjustable boost
> controler. Anyone know how much boost the
> stock ecu and fuel system can handle. Or a
> good way to modify it? Thanks
 

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Good advise Ian, I don't think you could go wrong with Jim Wolf components . This company knows there Nissan fuel injection . An alternative might be to use the Bell Engineering Group Boost Referenced Fuel Pressure Regulator . It increases the fuel pressure to you injectors as boost increases, however you must upgrade you fuel pump to keep up with fuel demand . The first thing I would do is make sure my car was in tip top shape an engine scope at a trusted garage is a big bonus . If one injector is not working quite properly a hot spot is created and will burn a hole in your piston . Get your injectors cleaned and the will check for leakage and spray pattern .
Get a set of colder NGK non platnum plugs . Have some fun with the new power, play safe .

> The stock system can handle about 11 to 12
> psi. You might be able to push 13psi but
> your injectors will have to be in perfect
> condition. A good way to modify the system
> is to talk to Jim Wolf Tech. and he will
> recomend a setup for your needs. I'm sure he
> will suggest larger injectors, and his
> computer upgrade. Expect to pay about $1000
> for this. You may also need a higher flow
> fuel pump as well. The turbo Porsche pumps
> work well. Also, 3 exhaust and a high
> flow intake help a lot. Good luck!!!

> Ian
 

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Discussion Starter #4
> Good advise Ian, I don't think you could go
> wrong with Jim Wolf components . This
> company knows there Nissan fuel injection .
> An alternative might be to use the Bell
> Engineering Group Boost Referenced Fuel
> Pressure Regulator . It increases the fuel
> pressure to you injectors as boost
> increases, however you must upgrade you fuel
> pump to keep up with fuel demand . The first
> thing I would do is make sure my car was in
> tip top shape an engine scope at a trusted
> garage is a big bonus . If one injector is
> not working quite properly a hot spot is
> created and will burn a hole in your piston
> . Get your injectors cleaned and the will
> check for leakage and spray pattern .
> Get a set of colder NGK non platnum plugs .
> Have some fun with the new power, play safe
> .
Thanks guys, I want to run 15 psi (try to get 300hp) but I'm debating on whether to replace the stock ecu and injectors ($$) or get an addtional injector controler.
 

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(Boost) the guy here runs 17 psi with new fuel pump boost ref fuel press regulator and stock injectors . This is quite extrodinary, you should be able to get 15 psi . You probably do not need an AIC or new ecu and injectors . Good luck with your project and get back to us with your results bad or good !!!
 

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15 PSI = T3/T4 Turbo

BOOST is using a larger turbo to run 17 psi.
I doubt you will be able to get 300 hp out of the stock turbo no matter what else you do. Although the factory turbo will push 15 lbs of boost (maybe even more) it will not do it efficiently and you would probably not notice any major power gains from going say, 13lbs to 15 lbs.
On my Z I could not tell feel any gains in power pushing my factory turbo past 13 lbs. Right now I am keeping it at 12lbs. It may not sound like much but keep in mind that that is doubling the factory 6 lbs or so. You will definantly feel the difference there.
Would recommend at the least:
Intercooler
Larger fuel pump
Cartech regulator
Don't think the upgraded ECU would be worth it at this time. Factory turbo injectors (in good shape) should be fine. Next problem you will probably run into (I have) is the clutch starting to slip under boost.
 

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What about upgrading stock turbo?

> BOOST is using a larger turbo to run 17 psi.
> I doubt you will be able to get 300 hp out
> of the stock turbo no matter what else you
> do. Although the factory turbo will push 15
> lbs of boost (maybe even more) it will not
> do it efficiently and you would probably not
> notice any major power gains from going say,
> 13lbs to 15 lbs.
> On my Z I could not tell feel any gains in
> power pushing my factory turbo past 13 lbs.
> Right now I am keeping it at 12lbs. It may
> not sound like much but keep in mind that
> that is doubling the factory 6 lbs or so.
> You will definantly feel the difference
> there.
> Would recommend at the least:
> Intercooler
> Larger fuel pump
> Cartech regulator
> Don't think the upgraded ECU would be worth
> it at this time. Factory turbo injectors (in
> good shape) should be fine. Next problem you
> will probably run into (I have) is the
> clutch starting to slip under boost.

Just finished tearing down the turbo on the engine I just bought. Oil supply line was totally blocked, shaft is sheared, turbine and compressor wheels are trash.

1] Is unit rebuildable?

2] If so, are there any turbine or compressor upgrades available?

3] Should I throw the thing in the scrap pile and just go shopping for a new one?

Educated opinions and ideas greatly appreciated!
 

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Re: What about upgrading stock turbo?

Motorhead, this may be good or bad news for you but IMHO you should forget that turbo and get a new unit. If you are looking for BIG power that should be the way to go, it makes no sense to get a T3 to run the Z and later want more power, I think you are in the perfect moment to get a better unit.

Reasons:
You can get a new center cartridge, it cost some money and solve that problem but you also said that the shaft is sheared, that means a new turbine wheel and I am sure that the compressor wheel is not in good shape and also both howsings will be scored due to the wheels running out of position.
e-mail turbonetics and other souces, talk to them about your needs and goals and they will help.
dont consider Ball bearing center sections unless you have lots of money(that option alone cost around $500).
a new T4 unit should run for about $800-$1,000 but you will love you did.
BTW if you upgrade your turbo you will benefit from upgraded fuel injection system and of course an intercooler.

good luck

CarlosZXT

> Just finished tearing down the turbo on the
> engine I just bought. Oil supply line was
> totally blocked, shaft is sheared, turbine
> and compressor wheels are trash.

> 1] Is unit rebuildable?

> 2] If so, are there any turbine or
> compressor upgrades available?

> 3] Should I throw the thing in the scrap
> pile and just go shopping for a new one?

> Educated opinions and ideas greatly
> appreciated!
 

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Re: What about upgrading stock turbo?

> Motorhead, this may be good or bad news for
> you but IMHO you should forget that turbo
> and get a new unit. If you are looking for
> BIG power that should be the way to go, it
> makes no sense to get a T3 to run the Z and
> later want more power, I think you are in
> the perfect moment to get a better unit.

> Reasons:
> You can get a new center cartridge, it cost
> some money and solve that problem but you
> also said that the shaft is sheared, that
> means a new turbine wheel and I am sure that
> the compressor wheel is not in good shape
> and also both howsings will be scored due to
> the wheels running out of position.
> e-mail turbonetics and other souces, talk to
> them about your needs and goals and they
> will help.
> dont consider Ball bearing center sections
> unless you have lots of money(that option
> alone cost around $500).
> a new T4 unit should run for about
> $800-$1,000 but you will love you did.
> BTW if you upgrade your turbo you will
> benefit from upgraded fuel injection system
> and of course an intercooler.

> good luck

> CarlosZXT

Thanks Carlos
Intercooler's a given. You're right about wheels out of position. Both are pretty sad. Just wasn't sure about remaining components. Will take advice and shop/research. T4 sounds like the ticket!

Thanks
 

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I have seen guys run 18 psi on the stock computer. The upgrades include bigger turbo, bell engineering rising rate regulator, starion intercooler and a bigger fuel pump. Oh yea, this was on stock injectors and the guy was running a 12.58 in the quarter.
 

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Discussion Starter #11
> I have seen guys run 18 psi on the stock
> computer. The upgrades include bigger turbo,
> bell engineering rising rate regulator,
> starion intercooler and a bigger fuel pump.
> Oh yea, this was on stock injectors and the
> guy was running a 12.58 in the quarter.

Thanks for all the help everyone, do you know if these people are running the stock air flow meter?
 

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Re: 15 PSI = T3/T4 Turbo

this is billy from tampa,fl. i own a '83 280 turbo,i have a t04e/t3 turbo that flows 620cfm (the stock turbo is 365cfm) i have a starion intercooler custom intercooler pipes,greddy type-r blow-off valve,and a methanol injection setup.it consists of an aluminum tank,electric pump,and lines.it uses a nitrous oxide fogger,and the tank is pressurized by the intake manifold when i go into boost. the pump is activated by an adjustable pressure switch.these things have allowed me to run 18psi.i have a stage 5 advanced clutch technology clutch,and yes i have a stock computer and fuel system.i just rebuilt my engine before this,it has 1200 miles on it and 18psi is sick out of that turbo.i made a best pass of [email protected] on street tires,i went [email protected] with the stock turbo and no methanol. billy mattull(tampa,fl.)
 

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Re: What about upgrading stock turbo?

the best thing to do is let the professional decide.find the nearest turbo shop and give it to them,i went threw the same thing.how much?how fast do you want to go?and i said as long as i can kill a non-stock mustang and make it look easy that's what i want.majestic turbo in tampa,florida is excellent i am friends with all of them there.give them a call.dave,charlie(the magician),and dave will know what to do (813)-931-5110 and if you need somthing fabricated talk to charlie if he can't do it no one can,he amazes me everyday. billy mattull(tampa,fl.)
 

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Thanks Billy, got it!

> the best thing to do is let the professional
> decide.find the nearest turbo shop and give
> it to them,i went threw the same thing.how
> much?how fast do you want to go?and i said
> as long as i can kill a non-stock mustang
> and make it look easy that's what i
> want.majestic turbo in tampa,florida is
> excellent i am friends with all of them
> there.give them a call.dave,charlie(the
> magician),and dave will know what to do
> (813)-931-5110 and if you need somthing
> fabricated talk to charlie if he can't do it
> no one can,he amazes me everyday. billy
> mattull(tampa,fl.)
 

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How much boost for 13.8 run?

How much boost were you pushing with the factory turbo to get you into the 13's?

dave

> this is billy from tampa,fl. i own a '83 280
> turbo,i have a t04e/t3 turbo that flows
> 620cfm (the stock turbo is 365cfm) i have a
> starion intercooler custom intercooler
> pipes,greddy type-r blow-off valve,and a
> methanol injection setup.it consists of an
> aluminum tank,electric pump,and lines.it
> uses a nitrous oxide fogger,and the tank is
> pressurized by the intake manifold when i go
> into boost. the pump is activated by an
> adjustable pressure switch.these things have
> allowed me to run 18psi.i have a stage 5
> advanced clutch technology clutch,and yes i
> have a stock computer and fuel system.i just
> rebuilt my engine before this,it has 1200
> miles on it and 18psi is sick out of that
> turbo.i made a best pass of [email protected] on
> street tires,i went [email protected] with the
> stock turbo and no methanol. billy
> mattull(tampa,fl.)
 
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