how much psi to run?

[ShinRekka]

How much PSI do you think i can run with this setup?

custom manifold, T3 Hi-Flow .60 Turbocharger unit, Non- intercooled, Internal wastegate, Downpipe flange and universal downpipe (unassembled), Steel braided Oil send/return kit (w/ all necessary fittings), Cool side pipings, Couplers and clamps, Vacuum hoses and clamps, Cold air intake, Air Filter, Gasket(s), Nuts & Bolts, TurboXS blow off valve, Boost dependent Dual adjustable Fuel management unit (FMU), Fuel pump, Dual guage pillar pod, Air Fuel ratio meter, Boost/Vac guage. < that is the real nissan turbo kit i plan on buying

Plus i will be adding 3" exhaust, high flow cat, k+n intake, and a custom front mount intercooler, turbo timer, and instead i will get a triple gauge pillar pod and a boost gauge. I am also going to get the engine rebuilt at the time of installing the turbo kit.

This will be on the single cam KA24E

Also at the PSI you recommend how much hp do you think i will have?

[NismoFreakS14]

With 370cc injectors... 7 psi

Get some 550cc injectors and run 10 psi.

[enecks]

Originally Posted by NismoFreakS14

With 370cc injectors... 7 psi

Get some 550cc injectors and run 10 psi.

How high with 740s?

[NismoFreakS14]

Originally Posted by enecks

How high with 740s?

10 psi tops on the stock KA24E bottom end.

Build the motor, run the 740s, and I'd say you can run up to 2 bar.

[ShinRekka]

thanks

[ShinRekka]

hey how much horsepower do you think i'll have at 9psi

[dayna240sx]

that set-up would be retarded.

The t3 with a .60 trim could produce in the ballpark of ~25 psi, or around 2 bar as nismofreak said...

That is three times more boost than you can use, and will have 3 times a slower spool..

If I were to turbo charge your engine I would do so with a T25 or T28.

If it were going to later be used in competition I would opt for the ball bearing version rather than an OEM version..

this will yeild better spool, quicker online time, much easier to control, lower propensity for boost spikes, smaller in the already cramped engine bay.. more over it will produce boost in the range you want, and can produce more under proper control...

but concerning fuel, can you simply swap in bigger injectors? Or wouldn't you need to have a re-map/reflash done? Wouldn't it be better to just pick-up a Microtech?

3" exhaust is excessive..
and rather than buying the kit i think i would rather spend an afternoon fabricating my own turbo manifold.

but scrap all that if you are going to flop down ~$3ooo + on a rebuild, and already plan buying the turbo grind cam, titanium valves and retainers, etc, etc, port and polish, way lower compression forged pistons, forged connecting rods, forged or billet crank, light weight flywheel, coated, and skirted piston treatment... PLUS the turbo KIT

running high boost is expensive huh?

Or go my way for ~$15oo and run the stock engine nearly as fast as your $5ooo beast, until it blows (with proper engin , spend 2K for the rebuild and go another 1ooK miles... even faster than your $5ooo beast..

[ShinRekka]

ok i'll leave it at the starter kit. I'll use dif turbo. Starter kit is simpler and cheaper. If im not gonna run high boost might as well go with the starter kit, cause if your right their full turbo kit is a waste of money for only runing like 8-9 psi. I'll still intercool it and custom make the exhaust and what not. Still gonna be fast.

[J SPEC SilEighty]

To estimate your required fuel injector size you can use this simple formula:

expected bhp X .55
_________________ = lb/hr
number of injectors

lb/hr * 10.5 = cc/m




As dayna said, 3" will be WAY more than you need. There are a couple ways to size a tailpipe for a turbo car. One of the shortest ways to estimate a good size is to use a tailpipe approx 10% larger than the turbine outlet diameter. You can also use more complicated equations involving the increasing drag and airflow losses due to the airflow velocity being to high. You probably don't need to know those equations, but just send me a PM if you really want to know.





For 8-9 psi max, I'd go with something smaller like dayna suggested. At 9 psi, redline rpm, and a .85 Ve: the KA will flow 28.5 lb/min at a PR of 1.61. Find out the airflow at different RPM also and then plot all those (including the airflow for the redline rpm I gave you) onto a compressor map to find the perfect turbo for your needs.




Also just so you know:

Airflow (lb/min) * 60
--------------------- = Estimated WHP
A/F Ratio * BSFC

Use .55 for your BSFC unless you actually know it.

[ShinRekka]

Thanks for the info!!!!!!!!